java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 00:15:32,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 00:15:32,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 00:15:32,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 00:15:32,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 00:15:32,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 00:15:32,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 00:15:32,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 00:15:32,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 00:15:32,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 00:15:32,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 00:15:32,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 00:15:32,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 00:15:32,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 00:15:32,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 00:15:32,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 00:15:32,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 00:15:32,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 00:15:32,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 00:15:32,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 00:15:32,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 00:15:32,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 00:15:32,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 00:15:32,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 00:15:32,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 00:15:32,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 00:15:32,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 00:15:32,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 00:15:32,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 00:15:32,629 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 00:15:32,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 00:15:32,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 00:15:32,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 00:15:32,631 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 00:15:32,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 00:15:32,631 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 00:15:32,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 00:15:32,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 00:15:32,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 00:15:32,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 00:15:32,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 00:15:32,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 00:15:32,632 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 00:15:32,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 00:15:32,633 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 00:15:32,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 00:15:32,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 00:15:32,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 00:15:32,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 00:15:32,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 00:15:32,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 00:15:32,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 00:15:32,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 00:15:32,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 00:15:32,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 00:15:32,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 00:15:32,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 00:15:32,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 00:15:32,666 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 00:15:32,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 00:15:32,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 00:15:32,688 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 00:15:32,688 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 00:15:32,689 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-1.i [2019-10-02 00:15:32,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/022c8a139/713c6ff1b74c4866a93ef81ee969d664/FLAG77eaf690b [2019-10-02 00:15:33,201 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 00:15:33,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome2-1.i [2019-10-02 00:15:33,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/022c8a139/713c6ff1b74c4866a93ef81ee969d664/FLAG77eaf690b [2019-10-02 00:15:33,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/022c8a139/713c6ff1b74c4866a93ef81ee969d664 [2019-10-02 00:15:33,634 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 00:15:33,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 00:15:33,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 00:15:33,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 00:15:33,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 00:15:33,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:33,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae0ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33, skipping insertion in model container [2019-10-02 00:15:33,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:33,653 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 00:15:33,670 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 00:15:33,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:15:33,855 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 00:15:33,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:15:33,895 INFO L192 MainTranslator]: Completed translation [2019-10-02 00:15:33,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33 WrapperNode [2019-10-02 00:15:33,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 00:15:33,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 00:15:33,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 00:15:33,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 00:15:33,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:33,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:33,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:34,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:34,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:34,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:34,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (1/1) ... [2019-10-02 00:15:34,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 00:15:34,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 00:15:34,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 00:15:34,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 00:15:34,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (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 [2019-10-02 00:15:34,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 00:15:34,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 00:15:34,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 00:15:34,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 00:15:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 00:15:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 00:15:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 00:15:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 00:15:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 00:15:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 00:15:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 00:15:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 00:15:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 00:15:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 00:15:34,417 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 00:15:34,418 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-02 00:15:34,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:15:34 BoogieIcfgContainer [2019-10-02 00:15:34,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 00:15:34,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 00:15:34,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 00:15:34,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 00:15:34,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 12:15:33" (1/3) ... [2019-10-02 00:15:34,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3768b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:15:34, skipping insertion in model container [2019-10-02 00:15:34,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:15:33" (2/3) ... [2019-10-02 00:15:34,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3768b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:15:34, skipping insertion in model container [2019-10-02 00:15:34,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:15:34" (3/3) ... [2019-10-02 00:15:34,426 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2019-10-02 00:15:34,438 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 00:15:34,445 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 00:15:34,462 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 00:15:34,489 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 00:15:34,490 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 00:15:34,490 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 00:15:34,490 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 00:15:34,490 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 00:15:34,491 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 00:15:34,491 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 00:15:34,491 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 00:15:34,491 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 00:15:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-02 00:15:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 00:15:34,514 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:34,515 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:34,517 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash 696803616, now seen corresponding path program 1 times [2019-10-02 00:15:34,524 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:34,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:34,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:34,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:34,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:15:34,645 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:15:34,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 00:15:34,648 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 00:15:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 00:15:34,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 00:15:34,660 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-02 00:15:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:34,681 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-02 00:15:34,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 00:15:34,682 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-02 00:15:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:34,691 INFO L225 Difference]: With dead ends: 56 [2019-10-02 00:15:34,692 INFO L226 Difference]: Without dead ends: 27 [2019-10-02 00:15:34,695 INFO L640 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 [2019-10-02 00:15:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-02 00:15:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-02 00:15:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-02 00:15:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-02 00:15:34,730 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2019-10-02 00:15:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:34,730 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-02 00:15:34,731 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 00:15:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-02 00:15:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 00:15:34,732 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:34,732 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:34,732 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash 123133892, now seen corresponding path program 1 times [2019-10-02 00:15:34,733 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:34,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:34,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:34,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:34,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:15:34,797 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:15:34,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 00:15:34,798 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 00:15:34,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 00:15:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 00:15:34,800 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-02 00:15:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:34,894 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-02 00:15:34,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 00:15:34,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-02 00:15:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:34,897 INFO L225 Difference]: With dead ends: 54 [2019-10-02 00:15:34,898 INFO L226 Difference]: Without dead ends: 35 [2019-10-02 00:15:34,899 INFO L640 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 [2019-10-02 00:15:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-02 00:15:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-10-02 00:15:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-02 00:15:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-02 00:15:34,906 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2019-10-02 00:15:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:34,907 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-02 00:15:34,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 00:15:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-02 00:15:34,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-02 00:15:34,908 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:34,908 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:34,909 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash -204061721, now seen corresponding path program 1 times [2019-10-02 00:15:34,909 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:34,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:34,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:34,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:34,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-02 00:15:35,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:15:35,019 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:15:35,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:35,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:15:35,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:15:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-02 00:15:35,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 00:15:35,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-02 00:15:35,157 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 00:15:35,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 00:15:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-02 00:15:35,158 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2019-10-02 00:15:35,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:35,358 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2019-10-02 00:15:35,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 00:15:35,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-02 00:15:35,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:35,362 INFO L225 Difference]: With dead ends: 80 [2019-10-02 00:15:35,362 INFO L226 Difference]: Without dead ends: 59 [2019-10-02 00:15:35,363 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-10-02 00:15:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-02 00:15:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2019-10-02 00:15:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-02 00:15:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-10-02 00:15:35,376 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 25 [2019-10-02 00:15:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:35,376 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-10-02 00:15:35,376 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 00:15:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-10-02 00:15:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-02 00:15:35,378 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:35,379 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:35,379 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1317149946, now seen corresponding path program 1 times [2019-10-02 00:15:35,380 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:35,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:35,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:35,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:35,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-02 00:15:35,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:15:35,619 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:15:35,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:35,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 00:15:35,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:15:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-02 00:15:35,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 00:15:35,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-02 00:15:35,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 00:15:35,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 00:15:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-02 00:15:35,773 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 15 states. [2019-10-02 00:15:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:36,637 INFO L93 Difference]: Finished difference Result 210 states and 283 transitions. [2019-10-02 00:15:36,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-02 00:15:36,638 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2019-10-02 00:15:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:36,641 INFO L225 Difference]: With dead ends: 210 [2019-10-02 00:15:36,641 INFO L226 Difference]: Without dead ends: 171 [2019-10-02 00:15:36,642 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-10-02 00:15:36,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-02 00:15:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-10-02 00:15:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-02 00:15:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 185 transitions. [2019-10-02 00:15:36,663 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 185 transitions. Word has length 49 [2019-10-02 00:15:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:36,663 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 185 transitions. [2019-10-02 00:15:36,663 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 00:15:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 185 transitions. [2019-10-02 00:15:36,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-02 00:15:36,666 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:36,667 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:36,667 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash -822665612, now seen corresponding path program 2 times [2019-10-02 00:15:36,668 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:36,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:36,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:36,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:36,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-10-02 00:15:37,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:15:37,006 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-02 00:15:37,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:15:37,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 00:15:37,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:15:37,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-02 00:15:37,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:15:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Stream closed [2019-10-02 00:15:37,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 00:15:37,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2019-10-02 00:15:37,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-02 00:15:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-02 00:15:37,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2019-10-02 00:15:37,303 INFO L87 Difference]: Start difference. First operand 144 states and 185 transitions. Second operand 26 states. [2019-10-02 00:15:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:38,996 INFO L93 Difference]: Finished difference Result 482 states and 654 transitions. [2019-10-02 00:15:38,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-02 00:15:38,997 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2019-10-02 00:15:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:39,000 INFO L225 Difference]: With dead ends: 482 [2019-10-02 00:15:39,000 INFO L226 Difference]: Without dead ends: 361 [2019-10-02 00:15:39,003 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1143, Invalid=3017, Unknown=0, NotChecked=0, Total=4160 [2019-10-02 00:15:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-02 00:15:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 256. [2019-10-02 00:15:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-10-02 00:15:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 333 transitions. [2019-10-02 00:15:39,031 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 333 transitions. Word has length 81 [2019-10-02 00:15:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:39,032 INFO L475 AbstractCegarLoop]: Abstraction has 256 states and 333 transitions. [2019-10-02 00:15:39,032 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-02 00:15:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 333 transitions. [2019-10-02 00:15:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-02 00:15:39,036 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:39,037 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:39,037 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 48136593, now seen corresponding path program 3 times [2019-10-02 00:15:39,037 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:39,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:39,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:39,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:15:39,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-10-02 00:15:39,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:15:39,436 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:15:39,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 00:15:39,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-02 00:15:39,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:15:39,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:15:39,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:15:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:15:39,591 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:15:39,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2019-10-02 00:15:39,592 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-02 00:15:39,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-02 00:15:39,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-10-02 00:15:39,593 INFO L87 Difference]: Start difference. First operand 256 states and 333 transitions. Second operand 28 states. [2019-10-02 00:15:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:40,469 INFO L93 Difference]: Finished difference Result 476 states and 632 transitions. [2019-10-02 00:15:40,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 00:15:40,470 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 121 [2019-10-02 00:15:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:40,472 INFO L225 Difference]: With dead ends: 476 [2019-10-02 00:15:40,472 INFO L226 Difference]: Without dead ends: 300 [2019-10-02 00:15:40,475 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2019-10-02 00:15:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-10-02 00:15:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 166. [2019-10-02 00:15:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-02 00:15:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2019-10-02 00:15:40,493 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 121 [2019-10-02 00:15:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:40,494 INFO L475 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2019-10-02 00:15:40,494 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-02 00:15:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2019-10-02 00:15:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-02 00:15:40,496 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:40,497 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:40,497 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1971339633, now seen corresponding path program 4 times [2019-10-02 00:15:40,497 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:40,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:40,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:40,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:15:40,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-10-02 00:15:40,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:15:40,674 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-02 00:15:40,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:15:40,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 00:15:40,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:15:40,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-02 00:15:40,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:15:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 133 proven. 247 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2019-10-02 00:15:41,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 00:15:41,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2019-10-02 00:15:41,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-02 00:15:41,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-02 00:15:41,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2019-10-02 00:15:41,005 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand 26 states. [2019-10-02 00:15:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:41,839 INFO L93 Difference]: Finished difference Result 488 states and 557 transitions. [2019-10-02 00:15:41,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-02 00:15:41,840 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2019-10-02 00:15:41,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:41,844 INFO L225 Difference]: With dead ends: 488 [2019-10-02 00:15:41,845 INFO L226 Difference]: Without dead ends: 355 [2019-10-02 00:15:41,849 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=690, Invalid=1662, Unknown=0, NotChecked=0, Total=2352 [2019-10-02 00:15:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2019-10-02 00:15:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 238. [2019-10-02 00:15:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-02 00:15:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 262 transitions. [2019-10-02 00:15:41,909 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 262 transitions. Word has length 121 [2019-10-02 00:15:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:41,911 INFO L475 AbstractCegarLoop]: Abstraction has 238 states and 262 transitions. [2019-10-02 00:15:41,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-02 00:15:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 262 transitions. [2019-10-02 00:15:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-02 00:15:41,923 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:41,923 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:41,923 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:41,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1668765843, now seen corresponding path program 1 times [2019-10-02 00:15:41,924 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:41,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:41,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:41,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:15:41,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2019-10-02 00:15:42,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:15:42,307 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:15:42,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:42,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-02 00:15:42,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:15:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2019-10-02 00:15:42,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 00:15:42,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 40 [2019-10-02 00:15:42,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-02 00:15:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-02 00:15:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2019-10-02 00:15:42,662 INFO L87 Difference]: Start difference. First operand 238 states and 262 transitions. Second operand 40 states. [2019-10-02 00:15:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:45,608 INFO L93 Difference]: Finished difference Result 1919 states and 2267 transitions. [2019-10-02 00:15:45,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-10-02 00:15:45,609 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2019-10-02 00:15:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:45,622 INFO L225 Difference]: With dead ends: 1919 [2019-10-02 00:15:45,622 INFO L226 Difference]: Without dead ends: 1718 [2019-10-02 00:15:45,630 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3767 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3958, Invalid=8474, Unknown=0, NotChecked=0, Total=12432 [2019-10-02 00:15:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2019-10-02 00:15:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 851. [2019-10-02 00:15:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 851 states. [2019-10-02 00:15:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 980 transitions. [2019-10-02 00:15:45,750 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 980 transitions. Word has length 137 [2019-10-02 00:15:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:45,751 INFO L475 AbstractCegarLoop]: Abstraction has 851 states and 980 transitions. [2019-10-02 00:15:45,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-02 00:15:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 980 transitions. [2019-10-02 00:15:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-02 00:15:45,759 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:45,760 INFO L411 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:45,762 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1663572564, now seen corresponding path program 2 times [2019-10-02 00:15:45,763 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:45,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:45,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:45,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:15:45,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1888 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2019-10-02 00:15:46,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:15:46,826 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:15:46,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 00:15:46,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 00:15:46,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:15:46,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-02 00:15:46,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:15:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2019-10-02 00:15:47,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 00:15:47,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 29] total 73 [2019-10-02 00:15:47,777 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-10-02 00:15:47,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-10-02 00:15:47,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1482, Invalid=3774, Unknown=0, NotChecked=0, Total=5256 [2019-10-02 00:15:47,779 INFO L87 Difference]: Start difference. First operand 851 states and 980 transitions. Second operand 73 states. [2019-10-02 00:15:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:15:55,343 INFO L93 Difference]: Finished difference Result 4519 states and 5515 transitions. [2019-10-02 00:15:55,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2019-10-02 00:15:55,344 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 225 [2019-10-02 00:15:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:15:55,369 INFO L225 Difference]: With dead ends: 4519 [2019-10-02 00:15:55,370 INFO L226 Difference]: Without dead ends: 3747 [2019-10-02 00:15:55,389 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14155 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13902, Invalid=30408, Unknown=0, NotChecked=0, Total=44310 [2019-10-02 00:15:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2019-10-02 00:15:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 1478. [2019-10-02 00:15:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1478 states. [2019-10-02 00:15:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 1739 transitions. [2019-10-02 00:15:55,651 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 1739 transitions. Word has length 225 [2019-10-02 00:15:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:15:55,653 INFO L475 AbstractCegarLoop]: Abstraction has 1478 states and 1739 transitions. [2019-10-02 00:15:55,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-10-02 00:15:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 1739 transitions. [2019-10-02 00:15:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2019-10-02 00:15:55,670 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:15:55,671 INFO L411 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:15:55,671 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:15:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:15:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1786185632, now seen corresponding path program 3 times [2019-10-02 00:15:55,672 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:15:55,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:15:55,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:55,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:15:55,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:15:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:15:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9168 backedges. 0 proven. 6750 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2019-10-02 00:15:58,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:15:58,441 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:15:58,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 00:18:20,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-10-02 00:18:20,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:18:20,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 00:18:20,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:18:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9168 backedges. 833 proven. 57 refuted. 0 times theorem prover too weak. 8278 trivial. 0 not checked. [2019-10-02 00:18:20,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 00:18:20,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 10] total 98 [2019-10-02 00:18:20,624 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-10-02 00:18:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-10-02 00:18:20,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2329, Invalid=7177, Unknown=0, NotChecked=0, Total=9506 [2019-10-02 00:18:20,626 INFO L87 Difference]: Start difference. First operand 1478 states and 1739 transitions. Second operand 98 states. [2019-10-02 00:18:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:18:28,503 INFO L93 Difference]: Finished difference Result 2364 states and 2989 transitions. [2019-10-02 00:18:28,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-10-02 00:18:28,504 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 401 [2019-10-02 00:18:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:18:28,510 INFO L225 Difference]: With dead ends: 2364 [2019-10-02 00:18:28,510 INFO L226 Difference]: Without dead ends: 1031 [2019-10-02 00:18:28,515 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7838 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11447, Invalid=25225, Unknown=0, NotChecked=0, Total=36672 [2019-10-02 00:18:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2019-10-02 00:18:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1022. [2019-10-02 00:18:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1022 states. [2019-10-02 00:18:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1113 transitions. [2019-10-02 00:18:28,593 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1113 transitions. Word has length 401 [2019-10-02 00:18:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:18:28,594 INFO L475 AbstractCegarLoop]: Abstraction has 1022 states and 1113 transitions. [2019-10-02 00:18:28,594 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-10-02 00:18:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1113 transitions. [2019-10-02 00:18:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2019-10-02 00:18:28,614 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:18:28,614 INFO L411 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:18:28,615 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:18:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:18:28,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1792206865, now seen corresponding path program 5 times [2019-10-02 00:18:28,615 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:18:28,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:18:28,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:18:28,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:18:28,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:18:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:18:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34503 backedges. 0 proven. 9152 refuted. 0 times theorem prover too weak. 25351 trivial. 0 not checked. [2019-10-02 00:18:30,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:18:30,991 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:18:31,036 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1