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/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:27:19,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:27:19,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:27:19,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 06:27:19,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:27:19,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:27:19,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:27:19,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:27:19,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:27:19,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:27:19,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:27:19,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:27:19,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:27:19,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:27:19,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:27:19,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:27:19,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:27:19,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:27:19,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:27:19,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:27:19,588 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 [2019-09-08 06:27:19,609 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:27:19,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:27:19,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:27:19,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:27:19,611 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:27:19,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:27:19,612 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:27:19,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:27:19,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:27:19,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:27:19,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:27:19,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:27:19,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:27:19,614 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:27:19,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:27:19,615 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:27:19,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:27:19,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:27:19,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:27:19,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:27:19,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:27:19,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:27:19,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:27:19,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:27:19,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:27:19,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:27:19,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:27:19,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:27:19,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:27:19,661 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:27:19,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:27:19,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:27:19,679 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:27:19,679 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:27:19,680 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2019-09-08 06:27:19,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07131bd69/885b3ac4d62c46feb227a71007b652d7/FLAG97ea4d8b1 [2019-09-08 06:27:20,202 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:27:20,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2019-09-08 06:27:20,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07131bd69/885b3ac4d62c46feb227a71007b652d7/FLAG97ea4d8b1 [2019-09-08 06:27:20,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07131bd69/885b3ac4d62c46feb227a71007b652d7 [2019-09-08 06:27:20,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:27:20,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:27:20,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:20,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:27:20,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:27:20,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a662ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20, skipping insertion in model container [2019-09-08 06:27:20,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,628 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:27:20,640 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:27:20,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:20,799 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:27:20,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:20,836 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:27:20,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20 WrapperNode [2019-09-08 06:27:20,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:20,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:27:20,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:27:20,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:27:20,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (1/1) ... [2019-09-08 06:27:20,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:27:20,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:27:20,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:27:20,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:27:20,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (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 [2019-09-08 06:27:21,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:27:21,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:27:21,008 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-09-08 06:27:21,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:27:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:27:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:27:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-09-08 06:27:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:27:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:27:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:27:21,172 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:27:21,173 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:27:21,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:21 BoogieIcfgContainer [2019-09-08 06:27:21,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:27:21,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:27:21,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:27:21,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:27:21,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:27:20" (1/3) ... [2019-09-08 06:27:21,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e14ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:21, skipping insertion in model container [2019-09-08 06:27:21,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:20" (2/3) ... [2019-09-08 06:27:21,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e14ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:21, skipping insertion in model container [2019-09-08 06:27:21,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:21" (3/3) ... [2019-09-08 06:27:21,182 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2019-09-08 06:27:21,192 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:27:21,201 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:27:21,222 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:27:21,270 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:27:21,271 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:27:21,271 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:27:21,271 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:27:21,271 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:27:21,272 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:27:21,272 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:27:21,272 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:27:21,272 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:27:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-08 06:27:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:27:21,302 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:21,303 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:21,305 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:21,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2019-09-08 06:27:21,312 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:21,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:21,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:21,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:21,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:27:21,488 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:21,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:21,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:21,507 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-09-08 06:27:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:21,623 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-09-08 06:27:21,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:21,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:27:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:21,636 INFO L225 Difference]: With dead ends: 35 [2019-09-08 06:27:21,636 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:27:21,640 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:27:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:27:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:27:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:27:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:27:21,684 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-09-08 06:27:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:21,685 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:27:21,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:27:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:27:21,687 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:21,687 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:21,687 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2019-09-08 06:27:21,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:21,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:21,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:21,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:21,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:27:21,740 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:21,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:21,743 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:21,744 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-09-08 06:27:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:21,822 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-09-08 06:27:21,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:21,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:27:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:21,824 INFO L225 Difference]: With dead ends: 27 [2019-09-08 06:27:21,824 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:27:21,826 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:27:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:27:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-09-08 06:27:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:27:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:27:21,834 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-09-08 06:27:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:21,835 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:27:21,835 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:21,835 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:27:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:27:21,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:21,837 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:21,837 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2019-09-08 06:27:21,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:21,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:21,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:21,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:21,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:27:21,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:21,944 INFO L223 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 [2019-09-08 06:27:21,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:21,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:27:22,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:27:22,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:22,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-09-08 06:27:22,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:27:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:27:22,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:22,076 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2019-09-08 06:27:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:22,213 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-09-08 06:27:22,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:27:22,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-09-08 06:27:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:22,215 INFO L225 Difference]: With dead ends: 38 [2019-09-08 06:27:22,215 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:27:22,216 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:27:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 06:27:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 06:27:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-08 06:27:22,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2019-09-08 06:27:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:22,224 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-08 06:27:22,225 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:27:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-08 06:27:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:27:22,226 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:22,226 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:22,227 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:22,227 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2019-09-08 06:27:22,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:22,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:22,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:22,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:22,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:27:22,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:22,326 INFO L223 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 [2019-09-08 06:27:22,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:22,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:27:22,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:27:22,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:22,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:27:22,392 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:27:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:27:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:27:22,393 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2019-09-08 06:27:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:22,500 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-09-08 06:27:22,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:27:22,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-08 06:27:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:22,504 INFO L225 Difference]: With dead ends: 32 [2019-09-08 06:27:22,504 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 06:27:22,504 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:22,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 06:27:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 06:27:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 06:27:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-09-08 06:27:22,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2019-09-08 06:27:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:22,513 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-09-08 06:27:22,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:27:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-09-08 06:27:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:27:22,515 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:22,515 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:22,515 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:22,516 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2019-09-08 06:27:22,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:22,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:22,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:22,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:22,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-08 06:27:22,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:22,693 INFO L223 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) [2019-09-08 06:27:22,713 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 [2019-09-08 06:27:22,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:22,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:22,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:27:22,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:27:22,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:22,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-08 06:27:22,808 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:27:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:27:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:27:22,809 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 13 states. [2019-09-08 06:27:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:23,196 INFO L93 Difference]: Finished difference Result 66 states and 99 transitions. [2019-09-08 06:27:23,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:27:23,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-09-08 06:27:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:23,199 INFO L225 Difference]: With dead ends: 66 [2019-09-08 06:27:23,199 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 06:27:23,200 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:27:23,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 06:27:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-09-08 06:27:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:27:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:27:23,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 40 [2019-09-08 06:27:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:23,218 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:27:23,219 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:27:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:27:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 06:27:23,222 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:23,222 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:23,222 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2019-09-08 06:27:23,223 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:23,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:23,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:23,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:23,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:27:23,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:23,332 INFO L223 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 [2019-09-08 06:27:23,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:27:23,373 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-08 06:27:23,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:23,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:27:23,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:27:23,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:23,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:27:23,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:27:23,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:27:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:27:23,412 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 7 states. [2019-09-08 06:27:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:23,516 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-09-08 06:27:23,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:27:23,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2019-09-08 06:27:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:23,523 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:27:23,523 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:27:23,529 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:27:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:27:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-09-08 06:27:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:27:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:27:23,541 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 68 [2019-09-08 06:27:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:23,541 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:27:23,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:27:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:27:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-08 06:27:23,543 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:23,543 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:23,544 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:23,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2019-09-08 06:27:23,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:23,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:23,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:23,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:23,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-09-08 06:27:23,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:23,659 INFO L223 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:23,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:27:23,708 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:23,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:23,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:27:23,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-09-08 06:27:23,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:23,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2019-09-08 06:27:23,773 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:27:23,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:27:23,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:23,774 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 8 states. [2019-09-08 06:27:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:23,904 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-08 06:27:23,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:27:23,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2019-09-08 06:27:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:23,911 INFO L225 Difference]: With dead ends: 54 [2019-09-08 06:27:23,911 INFO L226 Difference]: Without dead ends: 50 [2019-09-08 06:27:23,912 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-08 06:27:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-09-08 06:27:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-08 06:27:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2019-09-08 06:27:23,928 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 82 [2019-09-08 06:27:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:23,929 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2019-09-08 06:27:23,929 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:27:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2019-09-08 06:27:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-08 06:27:23,932 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:23,932 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:23,933 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash 702878917, now seen corresponding path program 5 times [2019-09-08 06:27:23,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:23,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:23,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:23,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:23,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 54 proven. 273 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-09-08 06:27:24,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:24,120 INFO L223 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) [2019-09-08 06:27:24,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:24,174 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 06:27:24,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:24,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:27:24,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 422 proven. 118 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:24,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:24,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2019-09-08 06:27:24,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:27:24,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:27:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:24,300 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 14 states. [2019-09-08 06:27:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:24,845 INFO L93 Difference]: Finished difference Result 107 states and 184 transitions. [2019-09-08 06:27:24,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:27:24,845 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2019-09-08 06:27:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:24,848 INFO L225 Difference]: With dead ends: 107 [2019-09-08 06:27:24,848 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:27:24,850 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:27:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:27:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2019-09-08 06:27:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:27:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2019-09-08 06:27:24,862 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 123 [2019-09-08 06:27:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:24,862 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2019-09-08 06:27:24,862 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:27:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2019-09-08 06:27:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-09-08 06:27:24,866 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:24,866 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:24,867 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:24,867 INFO L82 PathProgramCache]: Analyzing trace with hash 706081956, now seen corresponding path program 6 times [2019-09-08 06:27:24,867 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:24,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:24,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:24,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:24,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 167 proven. 537 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2019-09-08 06:27:25,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:25,007 INFO L223 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 [2019-09-08 06:27:25,018 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:27:25,079 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-08 06:27:25,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:25,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:27:25,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 241 proven. 445 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2019-09-08 06:27:25,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:25,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-09-08 06:27:25,184 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:27:25,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:27:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:27:25,186 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand 11 states. [2019-09-08 06:27:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:25,463 INFO L93 Difference]: Finished difference Result 72 states and 105 transitions. [2019-09-08 06:27:25,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:27:25,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 218 [2019-09-08 06:27:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:25,473 INFO L225 Difference]: With dead ends: 72 [2019-09-08 06:27:25,473 INFO L226 Difference]: Without dead ends: 68 [2019-09-08 06:27:25,474 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:27:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-08 06:27:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-08 06:27:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:27:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2019-09-08 06:27:25,503 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 218 [2019-09-08 06:27:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:25,504 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2019-09-08 06:27:25,504 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:27:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2019-09-08 06:27:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2019-09-08 06:27:25,513 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:25,513 INFO L399 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:25,513 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash 949186696, now seen corresponding path program 7 times [2019-09-08 06:27:25,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:25,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:25,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:25,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:25,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 581 proven. 634 refuted. 0 times theorem prover too weak. 4824 trivial. 0 not checked. [2019-09-08 06:27:25,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:25,874 INFO L223 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) [2019-09-08 06:27:25,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:25,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 06:27:25,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 655 proven. 768 refuted. 0 times theorem prover too weak. 4616 trivial. 0 not checked. [2019-09-08 06:27:26,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:26,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2019-09-08 06:27:26,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:27:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:27:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:26,135 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand 14 states. [2019-09-08 06:27:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:26,326 INFO L93 Difference]: Finished difference Result 112 states and 208 transitions. [2019-09-08 06:27:26,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:27:26,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 327 [2019-09-08 06:27:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:26,331 INFO L225 Difference]: With dead ends: 112 [2019-09-08 06:27:26,331 INFO L226 Difference]: Without dead ends: 79 [2019-09-08 06:27:26,332 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:27:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-08 06:27:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-08 06:27:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-08 06:27:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2019-09-08 06:27:26,344 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 327 [2019-09-08 06:27:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:26,345 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2019-09-08 06:27:26,345 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:27:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2019-09-08 06:27:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-09-08 06:27:26,349 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:26,350 INFO L399 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:26,350 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2019-09-08 06:27:26,351 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:26,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:26,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:26,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:26,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2019-09-08 06:27:26,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:26,935 INFO L223 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 [2019-09-08 06:27:26,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:27:27,040 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:27,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:27,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-08 06:27:27,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:27,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:27,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2019-09-08 06:27:27,517 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 06:27:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 06:27:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:27:27,518 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 28 states. [2019-09-08 06:27:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:28,015 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2019-09-08 06:27:28,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 06:27:28,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2019-09-08 06:27:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:28,018 INFO L225 Difference]: With dead ends: 115 [2019-09-08 06:27:28,018 INFO L226 Difference]: Without dead ends: 108 [2019-09-08 06:27:28,019 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 323 SyntacticMatches, 21 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:27:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-08 06:27:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2019-09-08 06:27:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-08 06:27:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 140 transitions. [2019-09-08 06:27:28,037 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 140 transitions. Word has length 286 [2019-09-08 06:27:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:28,039 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 140 transitions. [2019-09-08 06:27:28,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 06:27:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 140 transitions. [2019-09-08 06:27:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2019-09-08 06:27:28,045 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:28,045 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 42, 25, 25, 25, 25, 25, 25, 25, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:28,046 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2131914324, now seen corresponding path program 9 times [2019-09-08 06:27:28,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:28,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 934 proven. 401 refuted. 0 times theorem prover too weak. 5826 trivial. 0 not checked. [2019-09-08 06:27:28,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:28,268 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:28,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:27:28,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-08 06:27:28,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:28,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:27:28,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 1018 proven. 17 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2019-09-08 06:27:28,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:28,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2019-09-08 06:27:28,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:27:28,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:27:28,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:27:28,499 INFO L87 Difference]: Start difference. First operand 91 states and 140 transitions. Second operand 17 states. [2019-09-08 06:27:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:28,894 INFO L93 Difference]: Finished difference Result 165 states and 289 transitions. [2019-09-08 06:27:28,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 06:27:28,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 355 [2019-09-08 06:27:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:28,897 INFO L225 Difference]: With dead ends: 165 [2019-09-08 06:27:28,897 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 06:27:28,899 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:27:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 06:27:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2019-09-08 06:27:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-08 06:27:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2019-09-08 06:27:28,917 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 355 [2019-09-08 06:27:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:28,918 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2019-09-08 06:27:28,918 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:27:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2019-09-08 06:27:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-09-08 06:27:28,921 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:28,921 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:28,921 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:28,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:28,922 INFO L82 PathProgramCache]: Analyzing trace with hash -617256294, now seen corresponding path program 10 times [2019-09-08 06:27:28,922 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:28,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:28,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:28,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 426 proven. 1140 refuted. 0 times theorem prover too weak. 5554 trivial. 0 not checked. [2019-09-08 06:27:29,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:29,139 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:29,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:27:29,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:29,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:29,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-08 06:27:29,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 425 proven. 1358 refuted. 0 times theorem prover too weak. 5337 trivial. 0 not checked. [2019-09-08 06:27:29,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:29,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2019-09-08 06:27:29,362 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 06:27:29,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 06:27:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:27:29,363 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 15 states. [2019-09-08 06:27:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:29,525 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2019-09-08 06:27:29,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:27:29,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 354 [2019-09-08 06:27:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:29,527 INFO L225 Difference]: With dead ends: 84 [2019-09-08 06:27:29,527 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:27:29,528 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:27:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:27:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:27:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:27:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:27:29,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 354 [2019-09-08 06:27:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:29,530 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:27:29,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 06:27:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:27:29,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:27:29,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:27:30,244 WARN L188 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2019-09-08 06:27:30,321 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:27:30,321 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:27:30,321 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:27:30,321 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:27:30,321 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:27:30,321 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:27:30,322 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2019-09-08 06:27:30,322 INFO L443 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2019-09-08 06:27:30,322 INFO L443 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2019-09-08 06:27:30,322 INFO L439 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 7) (<= 7 main_~x~0)) [2019-09-08 06:27:30,322 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2019-09-08 06:27:30,323 INFO L443 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-09-08 06:27:30,323 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-09-08 06:27:30,323 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2019-09-08 06:27:30,323 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2019-09-08 06:27:30,323 INFO L443 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2019-09-08 06:27:30,323 INFO L443 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2019-09-08 06:27:30,323 INFO L439 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2019-09-08 06:27:30,323 INFO L443 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-09-08 06:27:30,324 INFO L439 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (and (let ((.cse0 (<= |fibo_#in~n| fibo_~n))) (or (and (<= 4 |fibo_#in~n|) (<= fibo_~n 4) .cse0 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (and .cse0 (<= 6 |fibo_#in~n|)) (and (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3) (<= 1 |fibo_#t~ret0|)) (and (<= 5 |fibo_#in~n|) (<= 3 |fibo_#t~ret0|) .cse0 (<= |fibo_#t~ret0| 3)))) (or (<= 8 |fibo_#in~n|) (<= |fibo_#in~n| 5) (and (<= |fibo_#t~ret0| 5) (<= |fibo_#in~n| 6) (<= 5 |fibo_#t~ret0|)) (and (<= 7 |fibo_#in~n|) (<= |fibo_#t~ret0| 8) (<= 8 |fibo_#t~ret0|))) (let ((.cse1 (<= fibo_~n |fibo_#in~n|))) (or (and .cse1 (<= 3 fibo_~n)) (and (<= |fibo_#in~n| 2) .cse1 (< 1 fibo_~n))))) [2019-09-08 06:27:30,324 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2019-09-08 06:27:30,324 INFO L443 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2019-09-08 06:27:30,324 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2019-09-08 06:27:30,324 INFO L446 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2019-09-08 06:27:30,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:27:30 BoogieIcfgContainer [2019-09-08 06:27:30,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:27:30,331 INFO L168 Benchmark]: Toolchain (without parser) took 9718.56 ms. Allocated memory was 133.2 MB in the beginning and 448.3 MB in the end (delta: 315.1 MB). Free memory was 89.4 MB in the beginning and 333.2 MB in the end (delta: -243.8 MB). Peak memory consumption was 324.5 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:30,335 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 133.2 MB. Free memory was 107.6 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:27:30,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.45 ms. Allocated memory is still 133.2 MB. Free memory was 89.2 MB in the beginning and 80.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:30,337 INFO L168 Benchmark]: Boogie Preprocessor took 119.32 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 80.1 MB in the beginning and 177.3 MB in the end (delta: -97.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:30,337 INFO L168 Benchmark]: RCFGBuilder took 215.93 ms. Allocated memory is still 200.3 MB. Free memory was 177.3 MB in the beginning and 166.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:30,338 INFO L168 Benchmark]: TraceAbstraction took 9153.53 ms. Allocated memory was 200.3 MB in the beginning and 448.3 MB in the end (delta: 248.0 MB). Free memory was 165.5 MB in the beginning and 333.2 MB in the end (delta: -167.7 MB). Peak memory consumption was 333.6 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:30,341 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 133.2 MB. Free memory was 107.6 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.45 ms. Allocated memory is still 133.2 MB. Free memory was 89.2 MB in the beginning and 80.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.32 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 80.1 MB in the beginning and 177.3 MB in the end (delta: -97.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 215.93 ms. Allocated memory is still 200.3 MB. Free memory was 177.3 MB in the beginning and 166.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9153.53 ms. Allocated memory was 200.3 MB in the beginning and 448.3 MB in the end (delta: 248.0 MB). Free memory was 165.5 MB in the beginning and 333.2 MB in the end (delta: -167.7 MB). Peak memory consumption was 333.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 9.0s OverallTime, 13 OverallIterations, 51 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 314 SDtfs, 329 SDslu, 1722 SDs, 0 SdLazy, 1827 SolverSat, 325 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2179 GetRequests, 1962 SyntacticMatches, 24 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 33 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 128 PreInvPairs, 303 NumberOfFragments, 115 HoareAnnotationTreeSize, 128 FomulaSimplifications, 2608 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1411 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 3839 NumberOfCodeBlocks, 3310 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 3815 ConstructedInterpolants, 0 QuantifiedInterpolants, 1849345 SizeOfPredicates, 51 NumberOfNonLiveVariables, 3023 ConjunctsInSsa, 270 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 48544/57544 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...