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_2calls_10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:13:36,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:13:36,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:13:36,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:13:36,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:13:36,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:13:36,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:13:36,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:13:36,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:13:36,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:13:36,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:13:36,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:13:36,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:13:36,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:13:36,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:13:36,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:13:36,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:13:36,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:13:36,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:13:36,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:13:36,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:13:36,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:13:36,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:13:36,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:13:36,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:13:36,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:13:36,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:13:36,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:13:36,653 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 06:13:36,668 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:13:36,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:13:36,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:13:36,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:13:36,670 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:13:36,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:13:36,670 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:13:36,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:13:36,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:13:36,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:13:36,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:13:36,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:13:36,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:13:36,672 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:13:36,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:13:36,672 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:13:36,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:13:36,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:13:36,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:13:36,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:13:36,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:13:36,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:13:36,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:13:36,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:13:36,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:13:36,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:13:36,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:13:36,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:13:36,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:13:36,706 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:13:36,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:13:36,723 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:13:36,724 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:13:36,725 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:13:36,725 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-1.c [2019-09-08 06:13:36,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c049d959/81a235505c9f441a970a57cb81648991/FLAGe9d5bba92 [2019-09-08 06:13:37,198 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:13:37,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-1.c [2019-09-08 06:13:37,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c049d959/81a235505c9f441a970a57cb81648991/FLAGe9d5bba92 [2019-09-08 06:13:37,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c049d959/81a235505c9f441a970a57cb81648991 [2019-09-08 06:13:37,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:13:37,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:13:37,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:37,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:13:37,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:13:37,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:37,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2243a972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37, skipping insertion in model container [2019-09-08 06:13:37,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:37,656 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:13:37,678 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:13:37,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:37,906 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:13:37,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:37,941 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:13:37,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37 WrapperNode [2019-09-08 06:13:37,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:37,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:13:37,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:13:37,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:13:38,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:38,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:38,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:38,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:38,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:38,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:38,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (1/1) ... [2019-09-08 06:13:38,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:13:38,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:13:38,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:13:38,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:13:38,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (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 06:13:38,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:13:38,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:13:38,174 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-09-08 06:13:38,175 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-09-08 06:13:38,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:13:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:13:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:13:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-09-08 06:13:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-09-08 06:13:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:13:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:13:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:13:38,399 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:13:38,400 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:13:38,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:38 BoogieIcfgContainer [2019-09-08 06:13:38,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:13:38,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:13:38,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:13:38,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:13:38,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:13:37" (1/3) ... [2019-09-08 06:13:38,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e03b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:38, skipping insertion in model container [2019-09-08 06:13:38,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:37" (2/3) ... [2019-09-08 06:13:38,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e03b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:38, skipping insertion in model container [2019-09-08 06:13:38,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:38" (3/3) ... [2019-09-08 06:13:38,427 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-1.c [2019-09-08 06:13:38,440 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:13:38,453 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:13:38,492 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:13:38,541 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:13:38,543 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:13:38,545 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:13:38,545 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:13:38,545 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:13:38,545 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:13:38,545 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:13:38,545 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:13:38,546 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:13:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-08 06:13:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:13:38,570 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:38,571 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:38,573 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2019-09-08 06:13:38,581 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:38,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:38,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:38,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:38,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:38,750 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 06:13:38,753 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:38,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:38,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:38,771 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2019-09-08 06:13:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:38,891 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-09-08 06:13:38,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:38,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:13:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:38,901 INFO L225 Difference]: With dead ends: 44 [2019-09-08 06:13:38,901 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:13:38,905 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 06:13:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:13:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:13:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:13:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:13:38,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2019-09-08 06:13:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:38,948 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:13:38,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:13:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:13:38,950 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:38,951 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:38,951 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2019-09-08 06:13:38,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:38,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:38,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:38,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:38,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,002 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 06:13:39,002 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:39,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:39,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:39,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:39,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:39,006 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-09-08 06:13:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:39,102 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-08 06:13:39,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:39,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:13:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:39,104 INFO L225 Difference]: With dead ends: 36 [2019-09-08 06:13:39,104 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:13:39,106 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 06:13:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:13:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:13:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:13:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:13:39,115 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2019-09-08 06:13:39,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:39,116 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:13:39,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:13:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:13:39,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:39,118 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:39,119 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2019-09-08 06:13:39,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:39,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:39,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:39,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:13:39,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:39,208 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) [2019-09-08 06:13:39,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:39,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:13:39,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:39,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2019-09-08 06:13:39,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:13:39,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:13:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:13:39,397 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2019-09-08 06:13:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:39,651 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2019-09-08 06:13:39,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:13:39,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-09-08 06:13:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:39,654 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:13:39,654 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:13:39,656 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:13:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:13:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-08 06:13:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:13:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-09-08 06:13:39,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2019-09-08 06:13:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:39,666 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-09-08 06:13:39,667 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:13:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-09-08 06:13:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:13:39,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:39,669 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:39,669 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2019-09-08 06:13:39,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:39,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:39,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:39,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:13:39,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:39,774 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) [2019-09-08 06:13:39,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:39,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:13:39,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:39,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:13:39,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:13:39,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:13:39,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:13:39,828 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-09-08 06:13:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:39,959 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-08 06:13:39,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:13:39,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-08 06:13:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:39,962 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:13:39,962 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:13:39,963 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:13:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:13:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-08 06:13:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:13:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:13:39,974 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2019-09-08 06:13:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:39,974 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:13:39,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:13:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:13:39,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 06:13:39,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:39,977 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:39,977 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:39,978 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2019-09-08 06:13:39,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:39,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:39,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:39,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:13:40,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:40,061 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:40,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:40,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:40,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:13:40,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:40,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2019-09-08 06:13:40,157 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:13:40,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:13:40,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:13:40,158 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2019-09-08 06:13:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:40,386 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2019-09-08 06:13:40,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:40,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-09-08 06:13:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:40,389 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:13:40,389 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:13:40,391 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:13:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:13:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:13:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:13:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-08 06:13:40,418 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2019-09-08 06:13:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:40,418 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-08 06:13:40,418 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:13:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-08 06:13:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:13:40,422 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:40,423 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:40,423 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:40,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2019-09-08 06:13:40,424 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:40,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:40,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:40,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:40,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:13:40,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:40,575 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) [2019-09-08 06:13:40,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:40,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:40,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:40,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:40,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-08 06:13:40,734 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:13:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:13:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:13:40,736 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 14 states. [2019-09-08 06:13:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:41,321 INFO L93 Difference]: Finished difference Result 102 states and 162 transitions. [2019-09-08 06:13:41,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:41,322 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-09-08 06:13:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:41,326 INFO L225 Difference]: With dead ends: 102 [2019-09-08 06:13:41,326 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:13:41,331 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:13:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:13:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-09-08 06:13:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:13:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2019-09-08 06:13:41,358 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 40 [2019-09-08 06:13:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:41,358 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2019-09-08 06:13:41,358 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:13:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2019-09-08 06:13:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 06:13:41,366 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:41,366 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:41,366 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2019-09-08 06:13:41,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:41,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:41,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:41,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:41,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:13:41,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:41,488 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 06:13:41,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:41,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:13:41,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-09-08 06:13:41,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:41,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2019-09-08 06:13:41,591 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:13:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:13:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:41,592 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand 12 states. [2019-09-08 06:13:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:41,805 INFO L93 Difference]: Finished difference Result 106 states and 197 transitions. [2019-09-08 06:13:41,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:13:41,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-09-08 06:13:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:41,809 INFO L225 Difference]: With dead ends: 106 [2019-09-08 06:13:41,809 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 06:13:41,810 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:13:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 06:13:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2019-09-08 06:13:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:13:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 110 transitions. [2019-09-08 06:13:41,841 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 110 transitions. Word has length 54 [2019-09-08 06:13:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:41,841 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 110 transitions. [2019-09-08 06:13:41,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:13:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 110 transitions. [2019-09-08 06:13:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-08 06:13:41,850 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:41,850 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:41,851 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 1 times [2019-09-08 06:13:41,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:41,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:41,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:41,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:41,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 28 proven. 83 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-08 06:13:42,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:42,024 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:42,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:42,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:13:42,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-09-08 06:13:42,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:42,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-09-08 06:13:42,151 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:13:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:13:42,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:13:42,153 INFO L87 Difference]: Start difference. First operand 68 states and 110 transitions. Second operand 11 states. [2019-09-08 06:13:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:42,337 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2019-09-08 06:13:42,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:42,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2019-09-08 06:13:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:42,341 INFO L225 Difference]: With dead ends: 108 [2019-09-08 06:13:42,341 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 06:13:42,342 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:13:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 06:13:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2019-09-08 06:13:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:13:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 125 transitions. [2019-09-08 06:13:42,366 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 125 transitions. Word has length 110 [2019-09-08 06:13:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:42,366 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 125 transitions. [2019-09-08 06:13:42,367 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:13:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 125 transitions. [2019-09-08 06:13:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-09-08 06:13:42,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:42,371 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:42,371 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:42,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1502420066, now seen corresponding path program 2 times [2019-09-08 06:13:42,372 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:42,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:42,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:42,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:42,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 67 proven. 255 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2019-09-08 06:13:42,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:42,531 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 06:13:42,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:42,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:42,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:42,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:13:42,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 54 proven. 344 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2019-09-08 06:13:42,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:42,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2019-09-08 06:13:42,881 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:13:42,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:13:42,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:13:42,883 INFO L87 Difference]: Start difference. First operand 72 states and 125 transitions. Second operand 16 states. [2019-09-08 06:13:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:43,264 INFO L93 Difference]: Finished difference Result 155 states and 406 transitions. [2019-09-08 06:13:43,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:43,265 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 214 [2019-09-08 06:13:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:43,271 INFO L225 Difference]: With dead ends: 155 [2019-09-08 06:13:43,271 INFO L226 Difference]: Without dead ends: 151 [2019-09-08 06:13:43,272 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:13:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-08 06:13:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2019-09-08 06:13:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 06:13:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 171 transitions. [2019-09-08 06:13:43,305 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 171 transitions. Word has length 214 [2019-09-08 06:13:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:43,308 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 171 transitions. [2019-09-08 06:13:43,309 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:13:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 171 transitions. [2019-09-08 06:13:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-09-08 06:13:43,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:43,321 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 23, 16, 16, 16, 15, 13, 13, 13, 13, 13, 13, 13, 8, 8, 8, 8, 8, 8, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:43,321 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -892000622, now seen corresponding path program 2 times [2019-09-08 06:13:43,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:43,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:43,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:43,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:43,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 162 proven. 406 refuted. 0 times theorem prover too weak. 2113 trivial. 0 not checked. [2019-09-08 06:13:43,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:43,658 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 06:13:43,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:43,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:43,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:43,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:13:43,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 113 proven. 611 refuted. 0 times theorem prover too weak. 1957 trivial. 0 not checked. [2019-09-08 06:13:44,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:44,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2019-09-08 06:13:44,020 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:13:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:13:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:13:44,021 INFO L87 Difference]: Start difference. First operand 87 states and 171 transitions. Second operand 19 states. [2019-09-08 06:13:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:45,092 INFO L93 Difference]: Finished difference Result 250 states and 676 transitions. [2019-09-08 06:13:45,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:13:45,093 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 304 [2019-09-08 06:13:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:45,097 INFO L225 Difference]: With dead ends: 250 [2019-09-08 06:13:45,098 INFO L226 Difference]: Without dead ends: 169 [2019-09-08 06:13:45,101 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:13:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-08 06:13:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 146. [2019-09-08 06:13:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-08 06:13:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 252 transitions. [2019-09-08 06:13:45,123 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 252 transitions. Word has length 304 [2019-09-08 06:13:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:45,124 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 252 transitions. [2019-09-08 06:13:45,124 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:13:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 252 transitions. [2019-09-08 06:13:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2019-09-08 06:13:45,133 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:45,133 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 29, 29, 27, 22, 18, 18, 18, 18, 18, 18, 18, 14, 14, 14, 14, 14, 14, 14, 13, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:45,134 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash 105980441, now seen corresponding path program 1 times [2019-09-08 06:13:45,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:45,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:45,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:45,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:45,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 197 proven. 763 refuted. 0 times theorem prover too weak. 4742 trivial. 0 not checked. [2019-09-08 06:13:45,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:45,414 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 06:13:45,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:45,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:13:45,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 163 proven. 1092 refuted. 0 times theorem prover too weak. 4447 trivial. 0 not checked. [2019-09-08 06:13:45,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:45,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2019-09-08 06:13:45,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:13:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:13:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:45,798 INFO L87 Difference]: Start difference. First operand 146 states and 252 transitions. Second operand 18 states. [2019-09-08 06:13:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:46,271 INFO L93 Difference]: Finished difference Result 203 states and 444 transitions. [2019-09-08 06:13:46,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:13:46,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 446 [2019-09-08 06:13:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:46,277 INFO L225 Difference]: With dead ends: 203 [2019-09-08 06:13:46,277 INFO L226 Difference]: Without dead ends: 199 [2019-09-08 06:13:46,279 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:13:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-09-08 06:13:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 168. [2019-09-08 06:13:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-09-08 06:13:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 321 transitions. [2019-09-08 06:13:46,301 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 321 transitions. Word has length 446 [2019-09-08 06:13:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:46,302 INFO L475 AbstractCegarLoop]: Abstraction has 168 states and 321 transitions. [2019-09-08 06:13:46,302 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:13:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 321 transitions. [2019-09-08 06:13:46,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2019-09-08 06:13:46,331 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:46,331 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 58, 58, 49, 44, 31, 31, 31, 31, 31, 31, 31, 29, 29, 29, 29, 29, 29, 29, 19, 18, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:46,331 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1536004483, now seen corresponding path program 2 times [2019-09-08 06:13:46,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:46,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:46,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:46,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:46,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20030 backedges. 412 proven. 1773 refuted. 0 times theorem prover too weak. 17845 trivial. 0 not checked. [2019-09-08 06:13:46,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:46,989 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 06:13:47,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:47,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:47,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:47,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:13:47,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20030 backedges. 353 proven. 2440 refuted. 0 times theorem prover too weak. 17237 trivial. 0 not checked. [2019-09-08 06:13:47,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:47,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2019-09-08 06:13:47,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:13:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:13:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:13:47,678 INFO L87 Difference]: Start difference. First operand 168 states and 321 transitions. Second operand 19 states. [2019-09-08 06:13:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:48,246 INFO L93 Difference]: Finished difference Result 262 states and 654 transitions. [2019-09-08 06:13:48,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:13:48,249 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 826 [2019-09-08 06:13:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:48,263 INFO L225 Difference]: With dead ends: 262 [2019-09-08 06:13:48,263 INFO L226 Difference]: Without dead ends: 258 [2019-09-08 06:13:48,265 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 825 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:13:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-09-08 06:13:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 179. [2019-09-08 06:13:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-09-08 06:13:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 319 transitions. [2019-09-08 06:13:48,301 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 319 transitions. Word has length 826 [2019-09-08 06:13:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:48,303 INFO L475 AbstractCegarLoop]: Abstraction has 179 states and 319 transitions. [2019-09-08 06:13:48,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:13:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 319 transitions. [2019-09-08 06:13:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2424 [2019-09-08 06:13:48,377 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:48,378 INFO L399 BasicCegarLoop]: trace histogram [202, 202, 157, 157, 148, 114, 101, 101, 101, 101, 101, 101, 101, 78, 78, 78, 78, 78, 78, 78, 70, 54, 43, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:48,379 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1728379976, now seen corresponding path program 3 times [2019-09-08 06:13:48,380 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:48,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:48,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:48,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:48,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 179719 backedges. 1475 proven. 7171 refuted. 0 times theorem prover too weak. 171073 trivial. 0 not checked. [2019-09-08 06:13:52,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:52,383 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) [2019-09-08 06:13:52,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:52,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 06:13:52,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:52,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:52,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 179719 backedges. 7936 proven. 6 refuted. 0 times theorem prover too weak. 171777 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:54,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:54,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2019-09-08 06:13:54,591 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:13:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:13:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:54,592 INFO L87 Difference]: Start difference. First operand 179 states and 319 transitions. Second operand 18 states. [2019-09-08 06:13:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:55,193 INFO L93 Difference]: Finished difference Result 410 states and 903 transitions. [2019-09-08 06:13:55,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:13:55,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 2423 [2019-09-08 06:13:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:55,198 INFO L225 Difference]: With dead ends: 410 [2019-09-08 06:13:55,198 INFO L226 Difference]: Without dead ends: 225 [2019-09-08 06:13:55,202 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2450 GetRequests, 2421 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:13:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-09-08 06:13:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 216. [2019-09-08 06:13:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-09-08 06:13:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 398 transitions. [2019-09-08 06:13:55,223 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 398 transitions. Word has length 2423 [2019-09-08 06:13:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:55,223 INFO L475 AbstractCegarLoop]: Abstraction has 216 states and 398 transitions. [2019-09-08 06:13:55,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:13:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 398 transitions. [2019-09-08 06:13:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1700 [2019-09-08 06:13:55,259 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:55,259 INFO L399 BasicCegarLoop]: trace histogram [144, 144, 135, 99, 99, 99, 86, 72, 72, 72, 72, 72, 72, 72, 49, 49, 49, 49, 49, 49, 49, 27, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:55,260 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1042503602, now seen corresponding path program 1 times [2019-09-08 06:13:55,261 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:55,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:55,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:55,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:55,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 89412 backedges. 963 proven. 3628 refuted. 0 times theorem prover too weak. 84821 trivial. 0 not checked. [2019-09-08 06:13:56,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:56,965 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:56,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:57,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 3765 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:13:57,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 89412 backedges. 1000 proven. 5232 refuted. 0 times theorem prover too weak. 83180 trivial. 0 not checked. [2019-09-08 06:13:59,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:59,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 19 [2019-09-08 06:13:59,448 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:13:59,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:13:59,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:13:59,449 INFO L87 Difference]: Start difference. First operand 216 states and 398 transitions. Second operand 19 states. [2019-09-08 06:14:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:00,368 INFO L93 Difference]: Finished difference Result 572 states and 1568 transitions. [2019-09-08 06:14:00,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 06:14:00,369 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1699 [2019-09-08 06:14:00,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:00,375 INFO L225 Difference]: With dead ends: 572 [2019-09-08 06:14:00,375 INFO L226 Difference]: Without dead ends: 235 [2019-09-08 06:14:00,382 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1724 GetRequests, 1689 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 06:14:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-09-08 06:14:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2019-09-08 06:14:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-09-08 06:14:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 390 transitions. [2019-09-08 06:14:00,404 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 390 transitions. Word has length 1699 [2019-09-08 06:14:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:00,405 INFO L475 AbstractCegarLoop]: Abstraction has 232 states and 390 transitions. [2019-09-08 06:14:00,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:14:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 390 transitions. [2019-09-08 06:14:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1589 [2019-09-08 06:14:00,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:00,430 INFO L399 BasicCegarLoop]: trace histogram [130, 130, 101, 101, 99, 96, 65, 65, 65, 65, 65, 65, 65, 50, 50, 50, 50, 50, 50, 50, 46, 34, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:00,430 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:00,431 INFO L82 PathProgramCache]: Analyzing trace with hash 488760994, now seen corresponding path program 4 times [2019-09-08 06:14:00,431 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:00,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:00,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:00,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:00,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 76371 backedges. 645 proven. 4370 refuted. 0 times theorem prover too weak. 71356 trivial. 0 not checked. [2019-09-08 06:14:01,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:01,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:01,935 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:14:02,251 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:14:02,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:02,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 2830 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:14:02,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 76371 backedges. 645 proven. 4370 refuted. 0 times theorem prover too weak. 71356 trivial. 0 not checked. [2019-09-08 06:14:03,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:03,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2019-09-08 06:14:03,256 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:14:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:14:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:14:03,257 INFO L87 Difference]: Start difference. First operand 232 states and 390 transitions. Second operand 13 states. [2019-09-08 06:14:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:03,572 INFO L93 Difference]: Finished difference Result 305 states and 605 transitions. [2019-09-08 06:14:03,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:14:03,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1588 [2019-09-08 06:14:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:03,581 INFO L225 Difference]: With dead ends: 305 [2019-09-08 06:14:03,582 INFO L226 Difference]: Without dead ends: 296 [2019-09-08 06:14:03,584 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1614 GetRequests, 1595 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:14:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-09-08 06:14:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 257. [2019-09-08 06:14:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2019-09-08 06:14:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 473 transitions. [2019-09-08 06:14:03,611 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 473 transitions. Word has length 1588 [2019-09-08 06:14:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:03,614 INFO L475 AbstractCegarLoop]: Abstraction has 257 states and 473 transitions. [2019-09-08 06:14:03,614 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:14:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 473 transitions. [2019-09-08 06:14:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1468 [2019-09-08 06:14:03,638 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:03,639 INFO L399 BasicCegarLoop]: trace histogram [126, 126, 89, 89, 86, 84, 63, 63, 63, 63, 63, 63, 63, 44, 44, 44, 44, 44, 44, 44, 42, 40, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:03,639 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:03,640 INFO L82 PathProgramCache]: Analyzing trace with hash 309349512, now seen corresponding path program 5 times [2019-09-08 06:14:03,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:03,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:03,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:03,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:03,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 65901 backedges. 818 proven. 3801 refuted. 0 times theorem prover too weak. 61282 trivial. 0 not checked. [2019-09-08 06:14:04,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:04,947 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:04,959 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:14:05,051 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-09-08 06:14:05,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:05,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-08 06:14:05,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 65901 backedges. 15068 proven. 18 refuted. 0 times theorem prover too weak. 50815 trivial. 0 not checked. [2019-09-08 06:14:05,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:05,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2019-09-08 06:14:05,955 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:14:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:14:05,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:14:05,956 INFO L87 Difference]: Start difference. First operand 257 states and 473 transitions. Second operand 17 states. [2019-09-08 06:14:06,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:06,633 INFO L93 Difference]: Finished difference Result 626 states and 1388 transitions. [2019-09-08 06:14:06,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:14:06,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1467 [2019-09-08 06:14:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:06,640 INFO L225 Difference]: With dead ends: 626 [2019-09-08 06:14:06,640 INFO L226 Difference]: Without dead ends: 322 [2019-09-08 06:14:06,646 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 1470 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:14:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2019-09-08 06:14:06,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 286. [2019-09-08 06:14:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2019-09-08 06:14:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 550 transitions. [2019-09-08 06:14:06,676 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 550 transitions. Word has length 1467 [2019-09-08 06:14:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:06,677 INFO L475 AbstractCegarLoop]: Abstraction has 286 states and 550 transitions. [2019-09-08 06:14:06,677 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:14:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 550 transitions. [2019-09-08 06:14:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1340 [2019-09-08 06:14:06,697 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:06,698 INFO L399 BasicCegarLoop]: trace histogram [112, 112, 83, 83, 83, 79, 56, 56, 56, 56, 56, 56, 56, 42, 41, 41, 41, 41, 41, 41, 41, 29, 23, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:06,698 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:06,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1279390816, now seen corresponding path program 6 times [2019-09-08 06:14:06,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:06,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:06,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:06,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:06,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 54400 backedges. 728 proven. 3471 refuted. 0 times theorem prover too weak. 50201 trivial. 0 not checked. [2019-09-08 06:14:07,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:07,850 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:07,860 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:14:07,973 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-08 06:14:07,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:07,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-08 06:14:07,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 54400 backedges. 11431 proven. 13 refuted. 0 times theorem prover too weak. 42956 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:14:09,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:09,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2019-09-08 06:14:09,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:14:09,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:14:09,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:14:09,368 INFO L87 Difference]: Start difference. First operand 286 states and 550 transitions. Second operand 19 states. [2019-09-08 06:14:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:10,358 INFO L93 Difference]: Finished difference Result 700 states and 1745 transitions. [2019-09-08 06:14:10,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:14:10,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1339 [2019-09-08 06:14:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:10,371 INFO L225 Difference]: With dead ends: 700 [2019-09-08 06:14:10,372 INFO L226 Difference]: Without dead ends: 389 [2019-09-08 06:14:10,380 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1340 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 06:14:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-09-08 06:14:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 354. [2019-09-08 06:14:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-09-08 06:14:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 700 transitions. [2019-09-08 06:14:10,423 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 700 transitions. Word has length 1339 [2019-09-08 06:14:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:10,423 INFO L475 AbstractCegarLoop]: Abstraction has 354 states and 700 transitions. [2019-09-08 06:14:10,423 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:14:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 700 transitions. [2019-09-08 06:14:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1460 [2019-09-08 06:14:10,446 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:10,447 INFO L399 BasicCegarLoop]: trace histogram [112, 112, 101, 101, 90, 84, 56, 56, 56, 56, 56, 56, 56, 50, 50, 50, 50, 50, 50, 50, 34, 34, 28, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:10,447 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:10,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash -47295877, now seen corresponding path program 7 times [2019-09-08 06:14:10,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:10,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:10,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 63615 backedges. 912 proven. 3659 refuted. 0 times theorem prover too weak. 59044 trivial. 0 not checked. [2019-09-08 06:14:12,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:12,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:12,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:12,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 3240 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:14:12,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 63615 backedges. 912 proven. 3659 refuted. 0 times theorem prover too weak. 59044 trivial. 0 not checked. [2019-09-08 06:14:13,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:13,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2019-09-08 06:14:13,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:14:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:14:13,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:14:13,401 INFO L87 Difference]: Start difference. First operand 354 states and 700 transitions. Second operand 13 states. [2019-09-08 06:14:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:13,676 INFO L93 Difference]: Finished difference Result 449 states and 1062 transitions. [2019-09-08 06:14:13,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:14:13,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1459 [2019-09-08 06:14:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:13,685 INFO L225 Difference]: With dead ends: 449 [2019-09-08 06:14:13,686 INFO L226 Difference]: Without dead ends: 440 [2019-09-08 06:14:13,687 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1485 GetRequests, 1466 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:14:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2019-09-08 06:14:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 357. [2019-09-08 06:14:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2019-09-08 06:14:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 719 transitions. [2019-09-08 06:14:13,734 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 719 transitions. Word has length 1459 [2019-09-08 06:14:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:13,735 INFO L475 AbstractCegarLoop]: Abstraction has 357 states and 719 transitions. [2019-09-08 06:14:13,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:14:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 719 transitions. [2019-09-08 06:14:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1533 [2019-09-08 06:14:13,759 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:13,760 INFO L399 BasicCegarLoop]: trace histogram [113, 113, 110, 110, 99, 88, 56, 56, 56, 56, 56, 56, 56, 55, 55, 55, 55, 55, 55, 55, 44, 32, 22, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:13,760 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1335523650, now seen corresponding path program 8 times [2019-09-08 06:14:13,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:13,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:13,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:13,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:13,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 70071 backedges. 1143 proven. 5978 refuted. 0 times theorem prover too weak. 62950 trivial. 0 not checked. [2019-09-08 06:14:15,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:15,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:15,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:14:15,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:14:15,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:15,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 3401 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:14:15,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 70071 backedges. 1141 proven. 3658 refuted. 0 times theorem prover too weak. 65272 trivial. 0 not checked. [2019-09-08 06:14:16,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:16,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 26 [2019-09-08 06:14:16,479 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 06:14:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 06:14:16,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:14:16,480 INFO L87 Difference]: Start difference. First operand 357 states and 719 transitions. Second operand 26 states. [2019-09-08 06:14:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:18,442 INFO L93 Difference]: Finished difference Result 674 states and 1511 transitions. [2019-09-08 06:14:18,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-08 06:14:18,443 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 1532 [2019-09-08 06:14:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:18,447 INFO L225 Difference]: With dead ends: 674 [2019-09-08 06:14:18,448 INFO L226 Difference]: Without dead ends: 318 [2019-09-08 06:14:18,455 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1598 GetRequests, 1532 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=604, Invalid=3952, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 06:14:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-09-08 06:14:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 269. [2019-09-08 06:14:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2019-09-08 06:14:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 404 transitions. [2019-09-08 06:14:18,477 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 404 transitions. Word has length 1532 [2019-09-08 06:14:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:18,478 INFO L475 AbstractCegarLoop]: Abstraction has 269 states and 404 transitions. [2019-09-08 06:14:18,478 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 06:14:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 404 transitions. [2019-09-08 06:14:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1365 [2019-09-08 06:14:18,496 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:18,497 INFO L399 BasicCegarLoop]: trace histogram [101, 101, 98, 98, 82, 81, 50, 50, 50, 50, 50, 50, 50, 49, 49, 49, 49, 49, 49, 49, 33, 31, 19, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:18,497 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:18,498 INFO L82 PathProgramCache]: Analyzing trace with hash -383718704, now seen corresponding path program 9 times [2019-09-08 06:14:18,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:18,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:18,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:18,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:18,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55377 backedges. 1344 proven. 3091 refuted. 0 times theorem prover too weak. 50942 trivial. 0 not checked. [2019-09-08 06:14:19,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:19,953 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:19,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:14:20,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-08 06:14:20,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:20,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:14:20,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 55377 backedges. 16023 proven. 4 refuted. 0 times theorem prover too weak. 39350 trivial. 0 not checked. [2019-09-08 06:14:20,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:20,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 20 [2019-09-08 06:14:20,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:14:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:14:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:14:20,844 INFO L87 Difference]: Start difference. First operand 269 states and 404 transitions. Second operand 20 states. [2019-09-08 06:14:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:21,384 INFO L93 Difference]: Finished difference Result 545 states and 881 transitions. [2019-09-08 06:14:21,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:14:21,385 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1364 [2019-09-08 06:14:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:21,389 INFO L225 Difference]: With dead ends: 545 [2019-09-08 06:14:21,389 INFO L226 Difference]: Without dead ends: 265 [2019-09-08 06:14:21,392 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1399 GetRequests, 1366 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:14:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-09-08 06:14:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2019-09-08 06:14:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-09-08 06:14:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 372 transitions. [2019-09-08 06:14:21,416 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 372 transitions. Word has length 1364 [2019-09-08 06:14:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:21,418 INFO L475 AbstractCegarLoop]: Abstraction has 260 states and 372 transitions. [2019-09-08 06:14:21,418 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:14:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 372 transitions. [2019-09-08 06:14:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1404 [2019-09-08 06:14:21,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:21,445 INFO L399 BasicCegarLoop]: trace histogram [104, 104, 101, 101, 83, 83, 52, 52, 52, 52, 52, 52, 52, 50, 50, 50, 50, 50, 50, 50, 33, 31, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:21,445 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1114418875, now seen corresponding path program 10 times [2019-09-08 06:14:21,447 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:21,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:21,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:21,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:21,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 58634 backedges. 922 proven. 4192 refuted. 0 times theorem prover too weak. 53520 trivial. 0 not checked. [2019-09-08 06:14:23,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:23,221 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:23,233 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:14:23,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:14:23,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:23,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:14:23,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 58634 backedges. 926 proven. 4184 refuted. 0 times theorem prover too weak. 53524 trivial. 0 not checked. [2019-09-08 06:14:24,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:24,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-09-08 06:14:24,307 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:14:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:14:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:14:24,308 INFO L87 Difference]: Start difference. First operand 260 states and 372 transitions. Second operand 18 states. [2019-09-08 06:14:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:24,620 INFO L93 Difference]: Finished difference Result 298 states and 454 transitions. [2019-09-08 06:14:24,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:14:24,620 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1403 [2019-09-08 06:14:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:24,626 INFO L225 Difference]: With dead ends: 298 [2019-09-08 06:14:24,626 INFO L226 Difference]: Without dead ends: 266 [2019-09-08 06:14:24,627 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1433 GetRequests, 1408 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:14:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-09-08 06:14:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2019-09-08 06:14:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-09-08 06:14:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 372 transitions. [2019-09-08 06:14:24,645 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 372 transitions. Word has length 1403 [2019-09-08 06:14:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:24,646 INFO L475 AbstractCegarLoop]: Abstraction has 260 states and 372 transitions. [2019-09-08 06:14:24,646 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:14:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 372 transitions. [2019-09-08 06:14:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1322 [2019-09-08 06:14:24,663 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:24,664 INFO L399 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 79, 77, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 31, 29, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:24,664 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:24,665 INFO L82 PathProgramCache]: Analyzing trace with hash -792894595, now seen corresponding path program 11 times [2019-09-08 06:14:24,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:24,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:24,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:24,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:24,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 51895 backedges. 1882 proven. 1889 refuted. 0 times theorem prover too weak. 48124 trivial. 0 not checked. [2019-09-08 06:14:25,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:25,672 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:25,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:14:25,941 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2019-09-08 06:14:25,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:25,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-08 06:14:25,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 51895 backedges. 27227 proven. 765 refuted. 0 times theorem prover too weak. 23903 trivial. 0 not checked. [2019-09-08 06:14:26,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:26,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2019-09-08 06:14:26,847 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 06:14:26,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 06:14:26,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:14:26,847 INFO L87 Difference]: Start difference. First operand 260 states and 372 transitions. Second operand 26 states. [2019-09-08 06:14:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:28,371 INFO L93 Difference]: Finished difference Result 528 states and 776 transitions. [2019-09-08 06:14:28,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-08 06:14:28,374 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 1321 [2019-09-08 06:14:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:28,377 INFO L225 Difference]: With dead ends: 528 [2019-09-08 06:14:28,377 INFO L226 Difference]: Without dead ends: 246 [2019-09-08 06:14:28,380 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1376 GetRequests, 1315 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=521, Invalid=3385, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 06:14:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-09-08 06:14:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 237. [2019-09-08 06:14:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-09-08 06:14:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 311 transitions. [2019-09-08 06:14:28,395 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 311 transitions. Word has length 1321 [2019-09-08 06:14:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:28,396 INFO L475 AbstractCegarLoop]: Abstraction has 237 states and 311 transitions. [2019-09-08 06:14:28,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 06:14:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 311 transitions. [2019-09-08 06:14:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1458 [2019-09-08 06:14:28,416 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:28,417 INFO L399 BasicCegarLoop]: trace histogram [108, 108, 105, 105, 86, 86, 54, 54, 54, 54, 54, 54, 54, 52, 52, 52, 52, 52, 52, 52, 34, 32, 22, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:28,417 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash -808002877, now seen corresponding path program 12 times [2019-09-08 06:14:28,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:28,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:28,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:28,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:28,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 63290 backedges. 2919 proven. 1832 refuted. 0 times theorem prover too weak. 58539 trivial. 0 not checked. [2019-09-08 06:14:29,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:29,633 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:29,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:14:29,873 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2019-09-08 06:14:29,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:29,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:14:29,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 63290 backedges. 4503 proven. 146 refuted. 0 times theorem prover too weak. 58641 trivial. 0 not checked. [2019-09-08 06:14:30,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:30,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2019-09-08 06:14:30,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 06:14:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 06:14:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:14:30,793 INFO L87 Difference]: Start difference. First operand 237 states and 311 transitions. Second operand 24 states. [2019-09-08 06:14:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:31,739 INFO L93 Difference]: Finished difference Result 340 states and 438 transitions. [2019-09-08 06:14:31,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:14:31,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1457 [2019-09-08 06:14:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:31,744 INFO L225 Difference]: With dead ends: 340 [2019-09-08 06:14:31,744 INFO L226 Difference]: Without dead ends: 274 [2019-09-08 06:14:31,746 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1496 GetRequests, 1455 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 06:14:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-09-08 06:14:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 255. [2019-09-08 06:14:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-09-08 06:14:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 312 transitions. [2019-09-08 06:14:31,760 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 312 transitions. Word has length 1457 [2019-09-08 06:14:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:31,762 INFO L475 AbstractCegarLoop]: Abstraction has 255 states and 312 transitions. [2019-09-08 06:14:31,762 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 06:14:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 312 transitions. [2019-09-08 06:14:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2019-09-08 06:14:31,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:31,776 INFO L399 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 72, 71, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 28, 27, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:31,777 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash 416823031, now seen corresponding path program 13 times [2019-09-08 06:14:31,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:31,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:31,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:31,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:31,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 43585 backedges. 0 proven. 14453 refuted. 0 times theorem prover too weak. 29132 trivial. 0 not checked. [2019-09-08 06:14:35,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:35,631 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:35,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:36,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 711 conjunts are in the unsatisfiable core [2019-09-08 06:14:36,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 43585 backedges. 0 proven. 14453 refuted. 0 times theorem prover too weak. 29132 trivial. 0 not checked. [2019-09-08 06:14:39,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:39,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 68 [2019-09-08 06:14:39,294 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-08 06:14:39,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-08 06:14:39,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 06:14:39,295 INFO L87 Difference]: Start difference. First operand 255 states and 312 transitions. Second operand 68 states. [2019-09-08 06:14:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:40,755 INFO L93 Difference]: Finished difference Result 277 states and 336 transitions. [2019-09-08 06:14:40,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-08 06:14:40,756 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 1212 [2019-09-08 06:14:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:40,759 INFO L225 Difference]: With dead ends: 277 [2019-09-08 06:14:40,759 INFO L226 Difference]: Without dead ends: 255 [2019-09-08 06:14:40,762 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1412 SyntacticMatches, 90 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 06:14:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-09-08 06:14:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2019-09-08 06:14:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2019-09-08 06:14:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 305 transitions. [2019-09-08 06:14:40,776 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 305 transitions. Word has length 1212 [2019-09-08 06:14:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:40,776 INFO L475 AbstractCegarLoop]: Abstraction has 251 states and 305 transitions. [2019-09-08 06:14:40,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-08 06:14:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 305 transitions. [2019-09-08 06:14:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1281 [2019-09-08 06:14:40,792 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:40,793 INFO L399 BasicCegarLoop]: trace histogram [95, 95, 92, 92, 76, 75, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 30, 28, 19, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:40,794 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:40,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1483137942, now seen corresponding path program 14 times [2019-09-08 06:14:40,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:40,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:40,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:40,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:40,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 48693 backedges. 1019 proven. 2630 refuted. 0 times theorem prover too weak. 45044 trivial. 0 not checked. [2019-09-08 06:14:42,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:42,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:42,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:14:42,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:14:42,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:42,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:14:42,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 48693 backedges. 1094 proven. 3547 refuted. 0 times theorem prover too weak. 44052 trivial. 0 not checked. [2019-09-08 06:14:43,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:43,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2019-09-08 06:14:43,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:14:43,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:14:43,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:14:43,351 INFO L87 Difference]: Start difference. First operand 251 states and 305 transitions. Second operand 19 states. [2019-09-08 06:14:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:43,667 INFO L93 Difference]: Finished difference Result 251 states and 305 transitions. [2019-09-08 06:14:43,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:14:43,668 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1280 [2019-09-08 06:14:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:43,670 INFO L225 Difference]: With dead ends: 251 [2019-09-08 06:14:43,670 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:14:43,672 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1280 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:14:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:14:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:14:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:14:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:14:43,673 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1280 [2019-09-08 06:14:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:43,674 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:14:43,674 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:14:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:14:43,674 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:14:43,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:14:45,242 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 74 [2019-09-08 06:14:46,927 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 80 [2019-09-08 06:14:51,294 WARN L188 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2019-09-08 06:14:53,389 WARN L188 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 242 DAG size of output: 68 [2019-09-08 06:14:53,633 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2019-09-08 06:14:56,545 WARN L188 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 362 DAG size of output: 55 [2019-09-08 06:14:56,549 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:14:56,549 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:14:56,549 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:14:56,549 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:14:56,549 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:14:56,549 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:14:56,550 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-09-08 06:14:56,550 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2019-09-08 06:14:56,550 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2019-09-08 06:14:56,550 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2019-09-08 06:14:56,550 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-09-08 06:14:56,550 INFO L443 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-09-08 06:14:56,550 INFO L439 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2019-09-08 06:14:56,550 INFO L443 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-09-08 06:14:56,550 INFO L443 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-09-08 06:14:56,550 INFO L446 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-09-08 06:14:56,551 INFO L439 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (not (<= |fibo2_#in~n| 2))) [2019-09-08 06:14:56,551 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-09-08 06:14:56,551 INFO L439 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse10 (<= 5 |fibo2_#in~n|)) (.cse12 (<= 4 fibo2_~n)) (.cse11 (<= fibo2_~n |fibo2_#in~n|)) (.cse9 (<= 7 |fibo2_#in~n|)) (.cse7 (<= |fibo2_#in~n| fibo2_~n)) (.cse4 (<= |fibo2_#in~n| 4))) (let ((.cse1 (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1) .cse4)) (.cse0 (and .cse11 .cse9 .cse7)) (.cse3 (and .cse11 .cse4 (<= |fibo2_#t~ret2| 2) .cse12 (<= 2 |fibo2_#t~ret2|))) (.cse5 (and .cse4 .cse12)) (.cse8 (and .cse11 .cse10 .cse7 (<= |fibo2_#in~n| 5))) (.cse2 (and .cse7 (and .cse11 (<= |fibo2_#in~n| 6)) (<= 6 |fibo2_#in~n|))) (.cse6 (<= fibo2_~n 3))) (and (or .cse0 .cse1 .cse2 (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) .cse3) (or (not .cse4) .cse5 .cse1) (or .cse0 (and .cse6 .cse7 (<= 3 |fibo2_#in~n|)) .cse8 .cse2 .cse3) (or .cse9 (not .cse10) .cse8 (and (<= |fibo2_#t~ret2| 5) (<= 5 |fibo2_#t~ret2|))) (or .cse5 .cse8 .cse2 (and (<= |fibo2_#t~ret2| 8) (<= 8 |fibo2_#t~ret2|)) (<= 8 |fibo2_#in~n|) .cse6) (or (<= 10 |fibo2_#in~n|) (<= |fibo2_#in~n| 8) (and (<= 21 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 21))) (or (and (<= |fibo2_#t~ret2| 13) (<= 13 |fibo2_#t~ret2|)) (<= 9 |fibo2_#in~n|) (<= |fibo2_#in~n| 7))))) [2019-09-08 06:14:56,551 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-09-08 06:14:56,551 INFO L443 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-09-08 06:14:56,551 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-09-08 06:14:56,551 INFO L443 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-09-08 06:14:56,552 INFO L443 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-09-08 06:14:56,552 INFO L446 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-09-08 06:14:56,552 INFO L439 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (not (<= |fibo1_#in~n| 2)) (<= |fibo1_#in~n| fibo1_~n)) [2019-09-08 06:14:56,552 INFO L443 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-09-08 06:14:56,552 INFO L439 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse9 (<= 3 fibo1_~n)) (.cse0 (<= fibo1_~n |fibo1_#in~n|))) (let ((.cse1 (and .cse9 .cse0 (<= |fibo1_#in~n| 7)))) (let ((.cse5 (and .cse1 (<= |fibo1_#in~n| 6))) (.cse6 (<= 6 |fibo1_#in~n|))) (let ((.cse4 (and (<= |fibo1_#in~n| 5) .cse0 .cse9)) (.cse2 (<= 7 |fibo1_#in~n|)) (.cse3 (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|) .cse5 .cse6)) (.cse8 (<= 8 fibo1_~n))) (and (or (and .cse0 (<= 9 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 13) (<= 13 |fibo1_#t~ret0|)) .cse1) (or (<= |fibo1_#in~n| 9) (<= 11 |fibo1_#in~n|) (and (<= |fibo1_#t~ret0| 34) (<= 34 |fibo1_#t~ret0|))) (or .cse2 .cse3 .cse4) (let ((.cse7 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse5 .cse6 .cse7) (and (<= 8 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 8) .cse7) (and .cse4 (<= 5 fibo1_~n)) (and .cse8 .cse7))) (or (and .cse1 .cse2) .cse3 (and .cse0 .cse8) (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)))))))) [2019-09-08 06:14:56,552 INFO L443 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-09-08 06:14:56,552 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-09-08 06:14:56,552 INFO L443 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-09-08 06:14:56,552 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-09-08 06:14:56,552 INFO L443 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-09-08 06:14:56,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:14:56 BoogieIcfgContainer [2019-09-08 06:14:56,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:14:56,558 INFO L168 Benchmark]: Toolchain (without parser) took 78921.51 ms. Allocated memory was 134.2 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 90.1 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2019-09-08 06:14:56,558 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 134.2 MB. Free memory was 108.7 MB in the beginning and 108.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:14:56,559 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.71 ms. Allocated memory is still 134.2 MB. Free memory was 89.9 MB in the beginning and 80.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-08 06:14:56,560 INFO L168 Benchmark]: Boogie Preprocessor took 172.07 ms. Allocated memory was 134.2 MB in the beginning and 201.3 MB in the end (delta: 67.1 MB). Free memory was 80.5 MB in the beginning and 177.9 MB in the end (delta: -97.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-08 06:14:56,560 INFO L168 Benchmark]: RCFGBuilder took 292.95 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 165.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2019-09-08 06:14:56,561 INFO L168 Benchmark]: TraceAbstraction took 78147.01 ms. Allocated memory was 201.3 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 165.1 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2019-09-08 06:14:56,564 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 134.2 MB. Free memory was 108.7 MB in the beginning and 108.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.71 ms. Allocated memory is still 134.2 MB. Free memory was 89.9 MB in the beginning and 80.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 172.07 ms. Allocated memory was 134.2 MB in the beginning and 201.3 MB in the end (delta: 67.1 MB). Free memory was 80.5 MB in the beginning and 177.9 MB in the end (delta: -97.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 292.95 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 165.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 78147.01 ms. Allocated memory was 201.3 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 165.1 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. SAFE Result, 78.0s OverallTime, 25 OverallIterations, 202 TraceHistogramMax, 15.3s AutomataDifference, 0.0s DeadEndRemovalTime, 12.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 911 SDtfs, 1345 SDslu, 9970 SDs, 0 SdLazy, 11622 SolverSat, 1632 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22640 GetRequests, 21836 SyntacticMatches, 94 SemanticMatches, 710 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5380 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=18, 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: 0.5s AutomataMinimizationTime, 25 MinimizatonAttempts, 575 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 1469 PreInvPairs, 5970 NumberOfFragments, 470 HoareAnnotationTreeSize, 1469 FomulaSimplifications, 738412 FormulaSimplificationTreeSizeReduction, 7.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 124169 FormulaSimplificationTreeSizeReductionInter, 5.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 25.4s InterpolantComputationTime, 43287 NumberOfCodeBlocks, 35245 NumberOfCodeBlocksAsserted, 155 NumberOfCheckSat, 43239 ConstructedInterpolants, 0 QuantifiedInterpolants, 77593597 SizeOfPredicates, 151 NumberOfNonLiveVariables, 29846 ConjunctsInSsa, 1017 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 1793755/1901934 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...