/usr/bin/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/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:25:01,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:25:01,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:25:01,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:25:01,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:25:01,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:25:01,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:25:01,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:25:01,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:25:01,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:25:01,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:25:01,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:25:01,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:25:01,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:25:01,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:25:01,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:25:01,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:25:01,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:25:01,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:25:01,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:25:01,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:25:01,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:25:01,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:25:01,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:25:01,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:25:01,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:25:01,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:25:01,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:25:01,566 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 [2019-11-06 21:25:01,601 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:25:01,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:25:01,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:25:01,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:25:01,607 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:25:01,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:25:01,607 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:25:01,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:25:01,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:25:01,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:25:01,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:25:01,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:25:01,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:25:01,609 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:25:01,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:25:01,609 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:25:01,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:25:01,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:25:01,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:25:01,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:25:01,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:25:01,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:25:01,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:25:01,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:25:01,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:25:01,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:25:01,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:25:01,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:25:01,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:25:01,878 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:25:01,898 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:25:01,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:25:01,903 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:25:01,903 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:25:01,904 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2019-11-06 21:25:01,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8e62d6f/c511f7c4e77e4d86a83038e6d2a86ccd/FLAGa56a0bcd0 [2019-11-06 21:25:02,451 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:25:02,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2019-11-06 21:25:02,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8e62d6f/c511f7c4e77e4d86a83038e6d2a86ccd/FLAGa56a0bcd0 [2019-11-06 21:25:02,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8e62d6f/c511f7c4e77e4d86a83038e6d2a86ccd [2019-11-06 21:25:02,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:25:02,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:25:02,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:25:02,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:25:02,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:25:02,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:25:02" (1/1) ... [2019-11-06 21:25:02,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b778097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:02, skipping insertion in model container [2019-11-06 21:25:02,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:25:02" (1/1) ... [2019-11-06 21:25:02,853 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:25:02,871 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:25:03,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:25:03,050 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:25:03,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:25:03,084 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:25:03,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03 WrapperNode [2019-11-06 21:25:03,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:25:03,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:25:03,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:25:03,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:25:03,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (1/1) ... [2019-11-06 21:25:03,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (1/1) ... [2019-11-06 21:25:03,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (1/1) ... [2019-11-06 21:25:03,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (1/1) ... [2019-11-06 21:25:03,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (1/1) ... [2019-11-06 21:25:03,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (1/1) ... [2019-11-06 21:25:03,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (1/1) ... [2019-11-06 21:25:03,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:25:03,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:25:03,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:25:03,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:25:03,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (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 [2019-11-06 21:25:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:25:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:25:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:25:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:25:03,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:25:03,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:25:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 21:25:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:25:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:25:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:25:03,403 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:25:03,403 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:25:03,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:25:03 BoogieIcfgContainer [2019-11-06 21:25:03,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:25:03,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:25:03,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:25:03,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:25:03,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:25:02" (1/3) ... [2019-11-06 21:25:03,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2593b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:25:03, skipping insertion in model container [2019-11-06 21:25:03,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:03" (2/3) ... [2019-11-06 21:25:03,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2593b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:25:03, skipping insertion in model container [2019-11-06 21:25:03,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:25:03" (3/3) ... [2019-11-06 21:25:03,413 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-11-06 21:25:03,423 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:25:03,431 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:25:03,443 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:25:03,470 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:25:03,470 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:25:03,471 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:25:03,471 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:25:03,471 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:25:03,471 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:25:03,472 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:25:03,472 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:25:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-06 21:25:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:25:03,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:03,505 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:03,507 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:03,515 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-11-06 21:25:03,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:03,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864954467] [2019-11-06 21:25:03,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:03,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864954467] [2019-11-06 21:25:03,648 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:25:03,648 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:25:03,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606477999] [2019-11-06 21:25:03,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:25:03,654 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:03,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:25:03,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:25:03,670 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-06 21:25:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:03,691 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-06 21:25:03,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:25:03,693 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:25:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:03,701 INFO L225 Difference]: With dead ends: 30 [2019-11-06 21:25:03,701 INFO L226 Difference]: Without dead ends: 13 [2019-11-06 21:25:03,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:25:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-06 21:25:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-06 21:25:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-06 21:25:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-06 21:25:03,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-06 21:25:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:03,738 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-06 21:25:03,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:25:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-06 21:25:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:25:03,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:03,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:03,740 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-11-06 21:25:03,740 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:03,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928268696] [2019-11-06 21:25:03,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:03,832 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928268696] [2019-11-06 21:25:03,833 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:25:03,833 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:25:03,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474251013] [2019-11-06 21:25:03,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:25:03,835 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:03,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:25:03,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:25:03,836 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-11-06 21:25:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:03,873 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-06 21:25:03,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:25:03,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-06 21:25:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:03,875 INFO L225 Difference]: With dead ends: 21 [2019-11-06 21:25:03,875 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:25:03,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:25:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:25:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-06 21:25:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-06 21:25:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-06 21:25:03,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-06 21:25:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:03,882 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-06 21:25:03,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:25:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-06 21:25:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 21:25:03,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:03,883 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:03,884 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:03,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2019-11-06 21:25:03,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:03,885 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91462806] [2019-11-06 21:25:03,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:04,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91462806] [2019-11-06 21:25:04,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208580798] [2019-11-06 21:25:04,147 INFO L94 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 [2019-11-06 21:25:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:04,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 21:25:04,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:04,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:04,401 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:04,402 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-06 21:25:04,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954902340] [2019-11-06 21:25:04,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 21:25:04,403 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 21:25:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:25:04,404 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 16 states. [2019-11-06 21:25:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:04,698 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-11-06 21:25:04,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 21:25:04,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-11-06 21:25:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:04,700 INFO L225 Difference]: With dead ends: 37 [2019-11-06 21:25:04,700 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 21:25:04,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:25:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 21:25:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-06 21:25:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 21:25:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-06 21:25:04,713 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2019-11-06 21:25:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:04,714 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-06 21:25:04,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 21:25:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-06 21:25:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:25:04,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:04,715 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:04,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:04,923 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 1 times [2019-11-06 21:25:04,925 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:04,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245404434] [2019-11-06 21:25:04,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:04,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245404434] [2019-11-06 21:25:04,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003934462] [2019-11-06 21:25:04,979 INFO L94 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 [2019-11-06 21:25:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:05,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 21:25:05,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:05,017 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:05,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-11-06 21:25:05,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644945235] [2019-11-06 21:25:05,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:25:05,018 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:05,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:25:05,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:25:05,019 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2019-11-06 21:25:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:05,063 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-11-06 21:25:05,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:25:05,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-06 21:25:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:05,065 INFO L225 Difference]: With dead ends: 30 [2019-11-06 21:25:05,065 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 21:25:05,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:25:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 21:25:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-06 21:25:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 21:25:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-06 21:25:05,075 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-11-06 21:25:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:05,077 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-06 21:25:05,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:25:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-06 21:25:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:25:05,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:05,080 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:05,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:05,281 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 2 times [2019-11-06 21:25:05,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:05,282 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376917133] [2019-11-06 21:25:05,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 21:25:05,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376917133] [2019-11-06 21:25:05,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703352835] [2019-11-06 21:25:05,543 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:05,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:05,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:05,576 WARN L254 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:25:05,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:05,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:05,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:05,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2019-11-06 21:25:05,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928550608] [2019-11-06 21:25:05,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 21:25:05,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 21:25:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-06 21:25:05,819 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 21 states. [2019-11-06 21:25:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:06,357 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-11-06 21:25:06,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 21:25:06,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2019-11-06 21:25:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:06,358 INFO L225 Difference]: With dead ends: 40 [2019-11-06 21:25:06,358 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 21:25:06,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 21:25:06,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 21:25:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 21:25:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 21:25:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-06 21:25:06,365 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2019-11-06 21:25:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:06,366 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-06 21:25:06,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 21:25:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-06 21:25:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:25:06,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:06,367 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:06,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:06,571 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:06,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 2 times [2019-11-06 21:25:06,572 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:06,572 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302124127] [2019-11-06 21:25:06,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:06,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302124127] [2019-11-06 21:25:06,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685417181] [2019-11-06 21:25:06,630 INFO L92 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 [2019-11-06 21:25:06,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:06,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:06,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 21:25:06,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:06,671 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:06,671 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-06 21:25:06,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057363650] [2019-11-06 21:25:06,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:25:06,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:25:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:06,673 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2019-11-06 21:25:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:06,708 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-11-06 21:25:06,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:25:06,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-06 21:25:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:06,710 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:25:06,710 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 21:25:06,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 21:25:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-06 21:25:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 21:25:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-06 21:25:06,718 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-11-06 21:25:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:06,721 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-06 21:25:06,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:25:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-06 21:25:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:25:06,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:06,723 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:06,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:06,933 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:06,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 3 times [2019-11-06 21:25:06,935 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:06,935 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541845532] [2019-11-06 21:25:06,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:06,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541845532] [2019-11-06 21:25:06,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032300320] [2019-11-06 21:25:06,993 INFO L92 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 [2019-11-06 21:25:07,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-06 21:25:07,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:07,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 21:25:07,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:07,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:07,037 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-06 21:25:07,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128967402] [2019-11-06 21:25:07,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:25:07,038 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:25:07,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:25:07,038 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2019-11-06 21:25:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:07,079 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-06 21:25:07,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:25:07,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-11-06 21:25:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:07,081 INFO L225 Difference]: With dead ends: 42 [2019-11-06 21:25:07,081 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 21:25:07,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:25:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 21:25:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-06 21:25:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 21:25:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-06 21:25:07,087 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2019-11-06 21:25:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:07,087 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-06 21:25:07,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:25:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-06 21:25:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:25:07,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:07,089 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:07,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:07,299 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:07,300 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 4 times [2019-11-06 21:25:07,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:07,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14307662] [2019-11-06 21:25:07,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:07,382 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14307662] [2019-11-06 21:25:07,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832085735] [2019-11-06 21:25:07,383 INFO L92 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 [2019-11-06 21:25:07,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:25:07,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:07,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 21:25:07,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:07,425 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:07,426 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-06 21:25:07,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247514343] [2019-11-06 21:25:07,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:07,427 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:07,429 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2019-11-06 21:25:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:07,485 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-11-06 21:25:07,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:25:07,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-11-06 21:25:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:07,487 INFO L225 Difference]: With dead ends: 45 [2019-11-06 21:25:07,487 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 21:25:07,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 21:25:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-06 21:25:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 21:25:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-06 21:25:07,493 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-11-06 21:25:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:07,493 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-06 21:25:07,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-06 21:25:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:25:07,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:07,495 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:07,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:07,705 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 5 times [2019-11-06 21:25:07,706 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:07,707 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977695575] [2019-11-06 21:25:07,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:07,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977695575] [2019-11-06 21:25:07,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414853451] [2019-11-06 21:25:07,801 INFO L92 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 [2019-11-06 21:25:07,850 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-06 21:25:07,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:07,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:25:07,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:07,860 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:07,861 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-06 21:25:07,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022899026] [2019-11-06 21:25:07,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:25:07,862 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:07,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:25:07,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:07,862 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2019-11-06 21:25:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:07,923 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-11-06 21:25:07,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:25:07,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-06 21:25:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:07,924 INFO L225 Difference]: With dead ends: 48 [2019-11-06 21:25:07,924 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 21:25:07,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 21:25:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-06 21:25:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 21:25:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-06 21:25:07,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2019-11-06 21:25:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:07,936 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-06 21:25:07,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:25:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-06 21:25:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:25:07,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:07,939 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:08,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:08,149 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 6 times [2019-11-06 21:25:08,150 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:08,150 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395743396] [2019-11-06 21:25:08,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:08,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395743396] [2019-11-06 21:25:08,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919919713] [2019-11-06 21:25:08,259 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:08,291 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-06 21:25:08,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:08,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 21:25:08,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:08,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:08,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-11-06 21:25:08,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381472106] [2019-11-06 21:25:08,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:25:08,304 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:25:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:08,305 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2019-11-06 21:25:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:08,365 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2019-11-06 21:25:08,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:25:08,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-11-06 21:25:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:08,371 INFO L225 Difference]: With dead ends: 51 [2019-11-06 21:25:08,371 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 21:25:08,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:08,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 21:25:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-06 21:25:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 21:25:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-06 21:25:08,377 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-11-06 21:25:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:08,378 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-06 21:25:08,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:25:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-06 21:25:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 21:25:08,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:08,379 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:08,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:08,583 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 7 times [2019-11-06 21:25:08,584 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:08,585 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921928607] [2019-11-06 21:25:08,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-06 21:25:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-06 21:25:08,664 INFO L172 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-06 21:25:08,664 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-06 21:25:08,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:25:08 BoogieIcfgContainer [2019-11-06 21:25:08,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-06 21:25:08,706 INFO L168 Benchmark]: Toolchain (without parser) took 5872.26 ms. Allocated memory was 147.3 MB in the beginning and 243.3 MB in the end (delta: 95.9 MB). Free memory was 104.0 MB in the beginning and 142.1 MB in the end (delta: -38.1 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. [2019-11-06 21:25:08,711 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 147.3 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-06 21:25:08,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.68 ms. Allocated memory is still 147.3 MB. Free memory was 103.8 MB in the beginning and 94.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-11-06 21:25:08,712 INFO L168 Benchmark]: Boogie Preprocessor took 111.98 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 94.1 MB in the beginning and 183.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-11-06 21:25:08,713 INFO L168 Benchmark]: RCFGBuilder took 207.54 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 172.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2019-11-06 21:25:08,714 INFO L168 Benchmark]: TraceAbstraction took 5296.84 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 171.9 MB in the beginning and 142.1 MB in the end (delta: 29.8 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB. [2019-11-06 21:25:08,717 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 147.3 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.68 ms. Allocated memory is still 147.3 MB. Free memory was 103.8 MB in the beginning and 94.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.98 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 94.1 MB in the beginning and 183.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 207.54 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 172.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5296.84 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 171.9 MB in the beginning and 142.1 MB in the end (delta: 29.8 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=10] [L13] COND TRUE i<=n VAL [i=1, n=0, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=10, n=2] [L13] i++ VAL [i=2, n=10, n=2] [L13] COND TRUE i<=n VAL [i=2, n=10, n=2] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=10, n=4] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=6, n=10] [L13] i++ VAL [i=4, n=6, n=10] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=4, n=10, n=8] [L13] i++ VAL [i=5, n=10, n=8] [L13] COND TRUE i<=n VAL [i=5, n=10, n=8] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=6, n=10, n=12] [L13] i++ VAL [i=7, n=10, n=12] [L13] COND TRUE i<=n VAL [i=7, n=12, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=7, n=14, n=10] [L13] i++ VAL [i=8, n=10, n=14] [L13] COND TRUE i<=n VAL [i=8, n=14, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=10, n=16] [L13] i++ VAL [i=9, n=10, n=16] [L13] COND TRUE i<=n VAL [i=9, n=16, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=9, n=18, n=10] [L13] i++ VAL [i=10, n=18, n=10] [L13] COND TRUE i<=n VAL [i=10, n=18, n=10] [L14] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L13] i++ VAL [i=11, n=18, n=10] [L13] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Result: UNSAFE, OverallTime: 5.2s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 114 SDtfs, 61 SDslu, 439 SDs, 0 SdLazy, 543 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 316 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 472 NumberOfCodeBlocks, 472 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 29868 SizeOfPredicates, 12 NumberOfNonLiveVariables, 448 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 145/780 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...