java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:51:04,282 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:51:04,285 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:51:04,303 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:51:04,304 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:51:04,306 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:51:04,307 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:51:04,309 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:51:04,311 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:51:04,312 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:51:04,313 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:51:04,313 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:51:04,314 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:51:04,315 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:51:04,316 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:51:04,317 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:51:04,318 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:51:04,320 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:51:04,322 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:51:04,323 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:51:04,324 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:51:04,326 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:51:04,328 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:51:04,337 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:51:04,352 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:51:04,352 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:51:04,353 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:51:04,353 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:51:04,356 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:51:04,356 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:51:04,356 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:51:04,357 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:51:04,358 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:51:04,358 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:51:04,358 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:51:04,358 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:51:04,359 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:51:04,359 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:51:04,359 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:51:04,359 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:51:04,359 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:51:04,360 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:51:04,361 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:51:04,361 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:51:04,361 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:51:04,361 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:51:04,362 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:51:04,362 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:51:04,362 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:51:04,363 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:51:04,363 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:51:04,363 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:51:04,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:51:04,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:51:04,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:51:04,448 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:51:04,449 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:51:04,450 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-10-22 15:51:04,507 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e57a4deb4/c6b5528536e248d88135709302ff81b5/FLAG27f14192f [2018-10-22 15:51:04,945 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:51:04,945 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-10-22 15:51:04,951 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e57a4deb4/c6b5528536e248d88135709302ff81b5/FLAG27f14192f [2018-10-22 15:51:04,966 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e57a4deb4/c6b5528536e248d88135709302ff81b5 [2018-10-22 15:51:04,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:51:04,977 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:51:04,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:51:04,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:51:04,983 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:51:04,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:51:04" (1/1) ... [2018-10-22 15:51:04,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b394b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:04, skipping insertion in model container [2018-10-22 15:51:04,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:51:04" (1/1) ... [2018-10-22 15:51:04,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:51:05,018 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:51:05,200 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:51:05,205 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:51:05,229 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:51:05,244 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:51:05,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05 WrapperNode [2018-10-22 15:51:05,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:51:05,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:51:05,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:51:05,246 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:51:05,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:51:05,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:51:05,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:51:05,283 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:51:05,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... [2018-10-22 15:51:05,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:51:05,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:51:05,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:51:05,315 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:51:05,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:05,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:51:05,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:51:05,724 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:51:05,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:51:05 BoogieIcfgContainer [2018-10-22 15:51:05,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:51:05,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:51:05,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:51:05,729 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:51:05,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:51:04" (1/3) ... [2018-10-22 15:51:05,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76607aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:51:05, skipping insertion in model container [2018-10-22 15:51:05,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:51:05" (2/3) ... [2018-10-22 15:51:05,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76607aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:51:05, skipping insertion in model container [2018-10-22 15:51:05,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:51:05" (3/3) ... [2018-10-22 15:51:05,737 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call.c [2018-10-22 15:51:05,760 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:51:05,773 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:51:05,805 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:51:05,844 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:51:05,845 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:51:05,845 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:51:05,845 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:51:05,846 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:51:05,846 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:51:05,846 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:51:05,846 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:51:05,847 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:51:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-22 15:51:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:51:05,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:05,889 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:05,891 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:05,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1650387823, now seen corresponding path program 1 times [2018-10-22 15:51:05,898 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:05,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:05,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:05,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:05,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,033 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:51:06,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:51:06,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:51:06,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:51:06,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:51:06,059 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-22 15:51:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:06,076 INFO L93 Difference]: Finished difference Result 32 states and 47 transitions. [2018-10-22 15:51:06,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:51:06,077 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-22 15:51:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:06,086 INFO L225 Difference]: With dead ends: 32 [2018-10-22 15:51:06,087 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:51:06,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:51:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:51:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:51:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:51:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2018-10-22 15:51:06,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2018-10-22 15:51:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:06,133 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-10-22 15:51:06,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:51:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2018-10-22 15:51:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:51:06,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:06,134 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:06,135 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:06,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:06,135 INFO L82 PathProgramCache]: Analyzing trace with hash 402334944, now seen corresponding path program 1 times [2018-10-22 15:51:06,135 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:06,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:06,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,252 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:51:06,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:51:06,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:51:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:51:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:51:06,257 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2018-10-22 15:51:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:06,418 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2018-10-22 15:51:06,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:51:06,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-22 15:51:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:06,420 INFO L225 Difference]: With dead ends: 35 [2018-10-22 15:51:06,420 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 15:51:06,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:51:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 15:51:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2018-10-22 15:51:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:51:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2018-10-22 15:51:06,426 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2018-10-22 15:51:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:06,426 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-10-22 15:51:06,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:51:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2018-10-22 15:51:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:51:06,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:06,428 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:06,428 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:06,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:06,429 INFO L82 PathProgramCache]: Analyzing trace with hash -272604169, now seen corresponding path program 1 times [2018-10-22 15:51:06,429 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:06,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:06,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:06,520 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:06,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:51:06,673 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:06,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-22 15:51:06,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:51:06,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:51:06,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:51:06,676 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2018-10-22 15:51:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:07,031 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2018-10-22 15:51:07,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:51:07,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-22 15:51:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:07,033 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:51:07,033 INFO L226 Difference]: Without dead ends: 34 [2018-10-22 15:51:07,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:51:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-22 15:51:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2018-10-22 15:51:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:51:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2018-10-22 15:51:07,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2018-10-22 15:51:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:07,046 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2018-10-22 15:51:07,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:51:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2018-10-22 15:51:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:51:07,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:07,048 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:07,048 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:07,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash -703387572, now seen corresponding path program 1 times [2018-10-22 15:51:07,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:07,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:07,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:07,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:07,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:07,131 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:07,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:07,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:07,282 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:07,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-10-22 15:51:07,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:51:07,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:51:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:51:07,284 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2018-10-22 15:51:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:07,620 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2018-10-22 15:51:07,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:51:07,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-10-22 15:51:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:07,625 INFO L225 Difference]: With dead ends: 83 [2018-10-22 15:51:07,626 INFO L226 Difference]: Without dead ends: 63 [2018-10-22 15:51:07,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:51:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-22 15:51:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2018-10-22 15:51:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 15:51:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-10-22 15:51:07,636 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 20 [2018-10-22 15:51:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:07,637 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-10-22 15:51:07,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:51:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-10-22 15:51:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 15:51:07,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:07,639 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:07,639 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:07,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1205750631, now seen corresponding path program 1 times [2018-10-22 15:51:07,640 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:07,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:07,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:07,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:07,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:07,729 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:07,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:07,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:07,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:07,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:51:07,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:51:07,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:51:07,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:51:07,791 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2018-10-22 15:51:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:08,098 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2018-10-22 15:51:08,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:51:08,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-10-22 15:51:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:08,102 INFO L225 Difference]: With dead ends: 89 [2018-10-22 15:51:08,102 INFO L226 Difference]: Without dead ends: 53 [2018-10-22 15:51:08,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:51:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-22 15:51:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2018-10-22 15:51:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:51:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2018-10-22 15:51:08,115 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 24 [2018-10-22 15:51:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:08,116 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2018-10-22 15:51:08,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:51:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2018-10-22 15:51:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:51:08,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:08,119 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:08,120 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:08,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:08,120 INFO L82 PathProgramCache]: Analyzing trace with hash -304718848, now seen corresponding path program 2 times [2018-10-22 15:51:08,120 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:08,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:08,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:08,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:08,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:08,337 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:08,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:08,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:08,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:08,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-22 15:51:08,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:08,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2018-10-22 15:51:08,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:51:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:51:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:51:08,443 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 9 states. [2018-10-22 15:51:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:08,812 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2018-10-22 15:51:08,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:51:08,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-10-22 15:51:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:08,817 INFO L225 Difference]: With dead ends: 178 [2018-10-22 15:51:08,817 INFO L226 Difference]: Without dead ends: 134 [2018-10-22 15:51:08,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:51:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-22 15:51:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2018-10-22 15:51:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-22 15:51:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2018-10-22 15:51:08,849 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 28 [2018-10-22 15:51:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:08,849 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2018-10-22 15:51:08,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:51:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2018-10-22 15:51:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:51:08,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:08,852 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:08,852 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:08,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1043421413, now seen corresponding path program 1 times [2018-10-22 15:51:08,853 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:08,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:08,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:08,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:09,085 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:09,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:09,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:51:09,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:51:09,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:51:09,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:51:09,160 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 8 states. [2018-10-22 15:51:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:09,325 INFO L93 Difference]: Finished difference Result 279 states and 323 transitions. [2018-10-22 15:51:09,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:51:09,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-10-22 15:51:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:09,331 INFO L225 Difference]: With dead ends: 279 [2018-10-22 15:51:09,331 INFO L226 Difference]: Without dead ends: 183 [2018-10-22 15:51:09,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:51:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-22 15:51:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2018-10-22 15:51:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-22 15:51:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2018-10-22 15:51:09,364 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 32 [2018-10-22 15:51:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:09,365 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2018-10-22 15:51:09,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:51:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2018-10-22 15:51:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-22 15:51:09,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:09,367 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:09,367 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:09,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:09,367 INFO L82 PathProgramCache]: Analyzing trace with hash -744681804, now seen corresponding path program 2 times [2018-10-22 15:51:09,367 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:09,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:09,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:09,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:09,604 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:09,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:09,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:09,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:09,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:09,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:51:09,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:51:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:51:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:51:09,683 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand 9 states. [2018-10-22 15:51:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:09,823 INFO L93 Difference]: Finished difference Result 311 states and 359 transitions. [2018-10-22 15:51:09,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:51:09,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-10-22 15:51:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:09,828 INFO L225 Difference]: With dead ends: 311 [2018-10-22 15:51:09,828 INFO L226 Difference]: Without dead ends: 199 [2018-10-22 15:51:09,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:51:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-22 15:51:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2018-10-22 15:51:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-22 15:51:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2018-10-22 15:51:09,844 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 36 [2018-10-22 15:51:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:09,844 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2018-10-22 15:51:09,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:51:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2018-10-22 15:51:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:51:09,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:09,846 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:09,847 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:09,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:09,847 INFO L82 PathProgramCache]: Analyzing trace with hash 38535629, now seen corresponding path program 3 times [2018-10-22 15:51:09,847 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:09,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:09,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:09,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:10,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:10,003 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:10,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:10,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 15:51:10,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:10,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-22 15:51:10,204 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:10,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2018-10-22 15:51:10,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:51:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:51:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:51:10,206 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand 16 states. [2018-10-22 15:51:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:11,013 INFO L93 Difference]: Finished difference Result 663 states and 767 transitions. [2018-10-22 15:51:11,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:51:11,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2018-10-22 15:51:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:11,016 INFO L225 Difference]: With dead ends: 663 [2018-10-22 15:51:11,017 INFO L226 Difference]: Without dead ends: 535 [2018-10-22 15:51:11,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:51:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2018-10-22 15:51:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 263. [2018-10-22 15:51:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-22 15:51:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 302 transitions. [2018-10-22 15:51:11,050 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 302 transitions. Word has length 40 [2018-10-22 15:51:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:11,050 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 302 transitions. [2018-10-22 15:51:11,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:51:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 302 transitions. [2018-10-22 15:51:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-22 15:51:11,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:11,053 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:11,053 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:11,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:11,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1908864387, now seen corresponding path program 3 times [2018-10-22 15:51:11,054 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:11,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:11,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:11,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:11,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:11,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:11,328 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:11,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:11,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 15:51:11,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:11,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-10-22 15:51:11,423 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:11,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2018-10-22 15:51:11,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:51:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:51:11,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:51:11,424 INFO L87 Difference]: Start difference. First operand 263 states and 302 transitions. Second operand 14 states. [2018-10-22 15:51:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:12,288 INFO L93 Difference]: Finished difference Result 666 states and 758 transitions. [2018-10-22 15:51:12,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:51:12,294 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2018-10-22 15:51:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:12,297 INFO L225 Difference]: With dead ends: 666 [2018-10-22 15:51:12,297 INFO L226 Difference]: Without dead ends: 512 [2018-10-22 15:51:12,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:51:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2018-10-22 15:51:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 315. [2018-10-22 15:51:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-22 15:51:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 359 transitions. [2018-10-22 15:51:12,331 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 359 transitions. Word has length 48 [2018-10-22 15:51:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:12,332 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 359 transitions. [2018-10-22 15:51:12,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:51:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 359 transitions. [2018-10-22 15:51:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:51:12,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:12,334 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:12,335 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:12,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:12,335 INFO L82 PathProgramCache]: Analyzing trace with hash -324593642, now seen corresponding path program 4 times [2018-10-22 15:51:12,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:12,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:12,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:12,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:12,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:12,588 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:12,597 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:12,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:12,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:12,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:12,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:12,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-22 15:51:12,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:51:12,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:51:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:51:12,704 INFO L87 Difference]: Start difference. First operand 315 states and 359 transitions. Second operand 13 states. [2018-10-22 15:51:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:13,147 INFO L93 Difference]: Finished difference Result 614 states and 703 transitions. [2018-10-22 15:51:13,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:51:13,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-10-22 15:51:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:13,156 INFO L225 Difference]: With dead ends: 614 [2018-10-22 15:51:13,156 INFO L226 Difference]: Without dead ends: 423 [2018-10-22 15:51:13,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:51:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-22 15:51:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 343. [2018-10-22 15:51:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-22 15:51:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 390 transitions. [2018-10-22 15:51:13,190 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 390 transitions. Word has length 52 [2018-10-22 15:51:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:13,191 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 390 transitions. [2018-10-22 15:51:13,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:51:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 390 transitions. [2018-10-22 15:51:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:51:13,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:13,193 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:13,193 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:13,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash -411539409, now seen corresponding path program 5 times [2018-10-22 15:51:13,194 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:13,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:13,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:13,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:13,438 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:13,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:13,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:51:13,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:13,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:13,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-22 15:51:13,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:51:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:51:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:51:13,567 INFO L87 Difference]: Start difference. First operand 343 states and 390 transitions. Second operand 14 states. [2018-10-22 15:51:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:13,804 INFO L93 Difference]: Finished difference Result 658 states and 752 transitions. [2018-10-22 15:51:13,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:51:13,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2018-10-22 15:51:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:13,808 INFO L225 Difference]: With dead ends: 658 [2018-10-22 15:51:13,808 INFO L226 Difference]: Without dead ends: 451 [2018-10-22 15:51:13,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:51:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-10-22 15:51:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 371. [2018-10-22 15:51:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-10-22 15:51:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 421 transitions. [2018-10-22 15:51:13,838 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 421 transitions. Word has length 56 [2018-10-22 15:51:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:13,839 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 421 transitions. [2018-10-22 15:51:13,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:51:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 421 transitions. [2018-10-22 15:51:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-22 15:51:13,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:13,840 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:13,840 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:13,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2055341000, now seen corresponding path program 6 times [2018-10-22 15:51:13,841 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:13,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:13,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:13,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:14,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:14,454 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:14,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:14,480 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-22 15:51:14,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:14,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-10-22 15:51:15,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:15,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 21 [2018-10-22 15:51:15,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:51:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:51:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:51:15,031 INFO L87 Difference]: Start difference. First operand 371 states and 421 transitions. Second operand 21 states. [2018-10-22 15:51:15,196 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-10-22 15:51:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:17,765 INFO L93 Difference]: Finished difference Result 890 states and 1018 transitions. [2018-10-22 15:51:17,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-22 15:51:17,766 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2018-10-22 15:51:17,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:17,771 INFO L225 Difference]: With dead ends: 890 [2018-10-22 15:51:17,771 INFO L226 Difference]: Without dead ends: 667 [2018-10-22 15:51:17,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=897, Invalid=2885, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:51:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2018-10-22 15:51:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 411. [2018-10-22 15:51:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-10-22 15:51:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 465 transitions. [2018-10-22 15:51:17,807 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 465 transitions. Word has length 60 [2018-10-22 15:51:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:17,807 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 465 transitions. [2018-10-22 15:51:17,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:51:17,807 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 465 transitions. [2018-10-22 15:51:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:51:17,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:17,808 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:17,809 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:17,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:17,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1602534976, now seen corresponding path program 1 times [2018-10-22 15:51:17,809 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:17,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:17,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:17,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:17,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-22 15:51:18,043 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:51:18,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:51:18,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:51:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:51:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:51:18,044 INFO L87 Difference]: Start difference. First operand 411 states and 465 transitions. Second operand 4 states. [2018-10-22 15:51:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:18,111 INFO L93 Difference]: Finished difference Result 655 states and 744 transitions. [2018-10-22 15:51:18,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:51:18,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2018-10-22 15:51:18,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:18,115 INFO L225 Difference]: With dead ends: 655 [2018-10-22 15:51:18,115 INFO L226 Difference]: Without dead ends: 427 [2018-10-22 15:51:18,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:51:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-22 15:51:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 407. [2018-10-22 15:51:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-22 15:51:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 459 transitions. [2018-10-22 15:51:18,151 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 459 transitions. Word has length 68 [2018-10-22 15:51:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:18,151 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 459 transitions. [2018-10-22 15:51:18,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:51:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 459 transitions. [2018-10-22 15:51:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-22 15:51:18,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:18,153 INFO L375 BasicCegarLoop]: trace histogram [29, 27, 27, 25, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:18,153 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:18,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1528765977, now seen corresponding path program 1 times [2018-10-22 15:51:18,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:18,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:18,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:18,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 786 proven. 392 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-22 15:51:18,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:18,419 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:18,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 786 proven. 392 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-22 15:51:18,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:18,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:51:18,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:51:18,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:51:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:51:18,530 INFO L87 Difference]: Start difference. First operand 407 states and 459 transitions. Second operand 17 states. [2018-10-22 15:51:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:18,797 INFO L93 Difference]: Finished difference Result 784 states and 892 transitions. [2018-10-22 15:51:18,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:51:18,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2018-10-22 15:51:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:18,800 INFO L225 Difference]: With dead ends: 784 [2018-10-22 15:51:18,800 INFO L226 Difference]: Without dead ends: 549 [2018-10-22 15:51:18,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:51:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2018-10-22 15:51:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 451. [2018-10-22 15:51:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-10-22 15:51:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 508 transitions. [2018-10-22 15:51:18,835 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 508 transitions. Word has length 129 [2018-10-22 15:51:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:18,836 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 508 transitions. [2018-10-22 15:51:18,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:51:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 508 transitions. [2018-10-22 15:51:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-22 15:51:18,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:18,838 INFO L375 BasicCegarLoop]: trace histogram [32, 30, 30, 28, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:18,838 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:18,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1089261280, now seen corresponding path program 2 times [2018-10-22 15:51:18,838 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:18,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:18,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:18,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 964 proven. 450 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2018-10-22 15:51:19,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:19,051 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:19,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:19,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:19,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:19,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 964 proven. 450 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2018-10-22 15:51:19,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:19,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-22 15:51:19,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:51:19,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:51:19,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:51:19,156 INFO L87 Difference]: Start difference. First operand 451 states and 508 transitions. Second operand 18 states. [2018-10-22 15:51:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:19,406 INFO L93 Difference]: Finished difference Result 826 states and 936 transitions. [2018-10-22 15:51:19,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:51:19,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2018-10-22 15:51:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:19,414 INFO L225 Difference]: With dead ends: 826 [2018-10-22 15:51:19,414 INFO L226 Difference]: Without dead ends: 559 [2018-10-22 15:51:19,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:51:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-10-22 15:51:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 479. [2018-10-22 15:51:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-10-22 15:51:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 539 transitions. [2018-10-22 15:51:19,466 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 539 transitions. Word has length 141 [2018-10-22 15:51:19,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:19,466 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 539 transitions. [2018-10-22 15:51:19,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:51:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 539 transitions. [2018-10-22 15:51:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-22 15:51:19,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:19,469 INFO L375 BasicCegarLoop]: trace histogram [34, 32, 32, 30, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:19,469 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:19,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:19,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1922033728, now seen corresponding path program 3 times [2018-10-22 15:51:19,469 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:19,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:19,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:19,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 1092 proven. 512 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2018-10-22 15:51:19,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:19,763 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:19,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:19,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 15:51:19,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:19,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 62 proven. 1096 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-10-22 15:51:20,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:20,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2018-10-22 15:51:20,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:51:20,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:51:20,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:51:20,157 INFO L87 Difference]: Start difference. First operand 479 states and 539 transitions. Second operand 26 states. [2018-10-22 15:51:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:21,867 INFO L93 Difference]: Finished difference Result 1605 states and 1821 transitions. [2018-10-22 15:51:21,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-22 15:51:21,868 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2018-10-22 15:51:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:21,874 INFO L225 Difference]: With dead ends: 1605 [2018-10-22 15:51:21,875 INFO L226 Difference]: Without dead ends: 1322 [2018-10-22 15:51:21,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1248, Invalid=4758, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:51:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2018-10-22 15:51:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 811. [2018-10-22 15:51:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2018-10-22 15:51:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 916 transitions. [2018-10-22 15:51:21,975 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 916 transitions. Word has length 149 [2018-10-22 15:51:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:21,976 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 916 transitions. [2018-10-22 15:51:21,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:51:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 916 transitions. [2018-10-22 15:51:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-22 15:51:21,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:21,979 INFO L375 BasicCegarLoop]: trace histogram [36, 34, 34, 32, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:21,979 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:21,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:21,979 INFO L82 PathProgramCache]: Analyzing trace with hash 185234210, now seen corresponding path program 1 times [2018-10-22 15:51:21,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:21,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:21,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:21,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:21,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 1228 proven. 578 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2018-10-22 15:51:22,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:22,575 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:22,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:22,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 1228 proven. 578 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2018-10-22 15:51:22,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:22,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-22 15:51:22,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:51:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:51:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:51:22,671 INFO L87 Difference]: Start difference. First operand 811 states and 916 transitions. Second operand 20 states. [2018-10-22 15:51:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:22,926 INFO L93 Difference]: Finished difference Result 1574 states and 1780 transitions. [2018-10-22 15:51:22,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:51:22,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 157 [2018-10-22 15:51:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:22,930 INFO L225 Difference]: With dead ends: 1574 [2018-10-22 15:51:22,930 INFO L226 Difference]: Without dead ends: 971 [2018-10-22 15:51:22,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:51:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2018-10-22 15:51:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 839. [2018-10-22 15:51:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2018-10-22 15:51:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 947 transitions. [2018-10-22 15:51:23,036 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 947 transitions. Word has length 157 [2018-10-22 15:51:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:23,036 INFO L481 AbstractCegarLoop]: Abstraction has 839 states and 947 transitions. [2018-10-22 15:51:23,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:51:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 947 transitions. [2018-10-22 15:51:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-22 15:51:23,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:23,039 INFO L375 BasicCegarLoop]: trace histogram [38, 36, 36, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:23,039 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:23,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:23,040 INFO L82 PathProgramCache]: Analyzing trace with hash -359223042, now seen corresponding path program 2 times [2018-10-22 15:51:23,040 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:23,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:23,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:23,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:23,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 1372 proven. 648 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-10-22 15:51:23,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:23,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:23,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:23,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:23,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:23,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 6 proven. 250 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2018-10-22 15:51:23,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:23,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6] total 23 [2018-10-22 15:51:23,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:51:23,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:51:23,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:51:23,871 INFO L87 Difference]: Start difference. First operand 839 states and 947 transitions. Second operand 23 states. [2018-10-22 15:51:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:25,099 INFO L93 Difference]: Finished difference Result 3963 states and 4287 transitions. [2018-10-22 15:51:25,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:51:25,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2018-10-22 15:51:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:25,108 INFO L225 Difference]: With dead ends: 3963 [2018-10-22 15:51:25,108 INFO L226 Difference]: Without dead ends: 3344 [2018-10-22 15:51:25,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=633, Invalid=1089, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:51:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2018-10-22 15:51:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 871. [2018-10-22 15:51:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2018-10-22 15:51:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 984 transitions. [2018-10-22 15:51:25,323 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 984 transitions. Word has length 165 [2018-10-22 15:51:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:25,323 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 984 transitions. [2018-10-22 15:51:25,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:51:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 984 transitions. [2018-10-22 15:51:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-22 15:51:25,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:25,326 INFO L375 BasicCegarLoop]: trace histogram [40, 38, 38, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:25,327 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:25,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:25,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1010720098, now seen corresponding path program 3 times [2018-10-22 15:51:25,327 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:25,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:25,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:25,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:25,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2972 backedges. 1524 proven. 722 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2018-10-22 15:51:25,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:25,626 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:25,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:25,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 15:51:25,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:25,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2972 backedges. 74 proven. 1528 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2018-10-22 15:51:25,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:25,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2018-10-22 15:51:25,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:51:25,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:51:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:25,991 INFO L87 Difference]: Start difference. First operand 871 states and 984 transitions. Second operand 29 states. [2018-10-22 15:51:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:31,286 INFO L93 Difference]: Finished difference Result 3286 states and 3549 transitions. [2018-10-22 15:51:31,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-22 15:51:31,287 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2018-10-22 15:51:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:31,296 INFO L225 Difference]: With dead ends: 3286 [2018-10-22 15:51:31,296 INFO L226 Difference]: Without dead ends: 2643 [2018-10-22 15:51:31,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3621 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2388, Invalid=9822, Unknown=0, NotChecked=0, Total=12210 [2018-10-22 15:51:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2018-10-22 15:51:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 931. [2018-10-22 15:51:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 931 states. [2018-10-22 15:51:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1051 transitions. [2018-10-22 15:51:31,506 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1051 transitions. Word has length 173 [2018-10-22 15:51:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:31,507 INFO L481 AbstractCegarLoop]: Abstraction has 931 states and 1051 transitions. [2018-10-22 15:51:31,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:51:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1051 transitions. [2018-10-22 15:51:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-22 15:51:31,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:31,509 INFO L375 BasicCegarLoop]: trace histogram [42, 40, 40, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:31,509 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:31,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1162401790, now seen corresponding path program 4 times [2018-10-22 15:51:31,510 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:31,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:31,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:31,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:31,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3288 backedges. 1684 proven. 800 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2018-10-22 15:51:32,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:32,702 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:32,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:32,737 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:32,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:32,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3288 backedges. 2428 proven. 119 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2018-10-22 15:51:33,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:33,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2018-10-22 15:51:33,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:51:33,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:51:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1471, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:33,186 INFO L87 Difference]: Start difference. First operand 931 states and 1051 transitions. Second operand 45 states. [2018-10-22 15:51:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:36,855 INFO L93 Difference]: Finished difference Result 3444 states and 3754 transitions. [2018-10-22 15:51:36,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:51:36,855 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 181 [2018-10-22 15:51:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:36,865 INFO L225 Difference]: With dead ends: 3444 [2018-10-22 15:51:36,865 INFO L226 Difference]: Without dead ends: 2753 [2018-10-22 15:51:36,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1586, Invalid=6070, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:51:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2018-10-22 15:51:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1409. [2018-10-22 15:51:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1409 states. [2018-10-22 15:51:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1548 transitions. [2018-10-22 15:51:37,234 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1548 transitions. Word has length 181 [2018-10-22 15:51:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:37,235 INFO L481 AbstractCegarLoop]: Abstraction has 1409 states and 1548 transitions. [2018-10-22 15:51:37,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:51:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1548 transitions. [2018-10-22 15:51:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-22 15:51:37,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:37,237 INFO L375 BasicCegarLoop]: trace histogram [44, 42, 42, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:37,237 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:37,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash -646928222, now seen corresponding path program 5 times [2018-10-22 15:51:37,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:37,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:37,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:37,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:37,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 1852 proven. 882 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-10-22 15:51:37,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:37,736 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:37,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:37,783 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-22 15:51:37,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:37,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 1852 proven. 882 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-10-22 15:51:37,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:37,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-22 15:51:37,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:51:37,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:51:37,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:51:37,840 INFO L87 Difference]: Start difference. First operand 1409 states and 1548 transitions. Second operand 24 states. [2018-10-22 15:51:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:40,523 INFO L93 Difference]: Finished difference Result 4037 states and 4325 transitions. [2018-10-22 15:51:40,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:51:40,525 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2018-10-22 15:51:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:40,535 INFO L225 Difference]: With dead ends: 4037 [2018-10-22 15:51:40,535 INFO L226 Difference]: Without dead ends: 2887 [2018-10-22 15:51:40,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:51:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2018-10-22 15:51:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1477. [2018-10-22 15:51:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1477 states. [2018-10-22 15:51:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1624 transitions. [2018-10-22 15:51:40,964 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1624 transitions. Word has length 189 [2018-10-22 15:51:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:40,965 INFO L481 AbstractCegarLoop]: Abstraction has 1477 states and 1624 transitions. [2018-10-22 15:51:40,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:51:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1624 transitions. [2018-10-22 15:51:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-22 15:51:40,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:40,967 INFO L375 BasicCegarLoop]: trace histogram [46, 44, 44, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:40,968 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:40,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:40,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1041308350, now seen corresponding path program 6 times [2018-10-22 15:51:40,968 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:40,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:40,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:40,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:40,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 2028 proven. 968 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2018-10-22 15:51:41,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:41,465 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:41,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:41,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-22 15:51:41,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:41,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 86 proven. 2032 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2018-10-22 15:51:41,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:41,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2018-10-22 15:51:41,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:51:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:51:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:51:41,715 INFO L87 Difference]: Start difference. First operand 1477 states and 1624 transitions. Second operand 32 states. [2018-10-22 15:51:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:46,668 INFO L93 Difference]: Finished difference Result 4413 states and 4744 transitions. [2018-10-22 15:51:46,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-22 15:51:46,668 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 197 [2018-10-22 15:51:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:46,679 INFO L225 Difference]: With dead ends: 4413 [2018-10-22 15:51:46,679 INFO L226 Difference]: Without dead ends: 3211 [2018-10-22 15:51:46,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2163, Invalid=8139, Unknown=0, NotChecked=0, Total=10302 [2018-10-22 15:51:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2018-10-22 15:51:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 1657. [2018-10-22 15:51:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2018-10-22 15:51:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 1820 transitions. [2018-10-22 15:51:47,100 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 1820 transitions. Word has length 197 [2018-10-22 15:51:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:47,101 INFO L481 AbstractCegarLoop]: Abstraction has 1657 states and 1820 transitions. [2018-10-22 15:51:47,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:51:47,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 1820 transitions. [2018-10-22 15:51:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-22 15:51:47,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:47,103 INFO L375 BasicCegarLoop]: trace histogram [49, 47, 47, 45, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:47,103 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:47,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:47,104 INFO L82 PathProgramCache]: Analyzing trace with hash -179235847, now seen corresponding path program 1 times [2018-10-22 15:51:47,104 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:47,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:47,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:47,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:47,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4520 backedges. 2306 proven. 1058 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-22 15:51:47,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:47,655 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:47,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:47,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4520 backedges. 2306 proven. 1058 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-22 15:51:47,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:47,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-22 15:51:47,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:51:47,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:51:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:51:47,760 INFO L87 Difference]: Start difference. First operand 1657 states and 1820 transitions. Second operand 26 states. [2018-10-22 15:51:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:50,255 INFO L93 Difference]: Finished difference Result 4499 states and 4834 transitions. [2018-10-22 15:51:50,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:51:50,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 209 [2018-10-22 15:51:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:50,263 INFO L225 Difference]: With dead ends: 4499 [2018-10-22 15:51:50,263 INFO L226 Difference]: Without dead ends: 3133 [2018-10-22 15:51:50,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:51:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2018-10-22 15:51:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 1721. [2018-10-22 15:51:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1721 states. [2018-10-22 15:51:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 1892 transitions. [2018-10-22 15:51:50,710 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 1892 transitions. Word has length 209 [2018-10-22 15:51:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:50,711 INFO L481 AbstractCegarLoop]: Abstraction has 1721 states and 1892 transitions. [2018-10-22 15:51:50,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:51:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 1892 transitions. [2018-10-22 15:51:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-22 15:51:50,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:50,713 INFO L375 BasicCegarLoop]: trace histogram [50, 48, 48, 46, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:50,713 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:50,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1355868544, now seen corresponding path program 2 times [2018-10-22 15:51:50,714 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:50,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:50,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:50,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:50,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4712 backedges. 2404 proven. 1152 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-22 15:51:51,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:51,130 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:51,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:51,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:51,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:51,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4712 backedges. 6 proven. 3480 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2018-10-22 15:51:51,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:51,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2018-10-22 15:51:51,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:51:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:51:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:51,285 INFO L87 Difference]: Start difference. First operand 1721 states and 1892 transitions. Second operand 29 states. [2018-10-22 15:51:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:54,681 INFO L93 Difference]: Finished difference Result 5053 states and 5484 transitions. [2018-10-22 15:51:54,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:51:54,682 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 213 [2018-10-22 15:51:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:54,691 INFO L225 Difference]: With dead ends: 5053 [2018-10-22 15:51:54,691 INFO L226 Difference]: Without dead ends: 3639 [2018-10-22 15:51:54,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1056, Invalid=1806, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:51:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2018-10-22 15:51:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2249. [2018-10-22 15:51:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2249 states. [2018-10-22 15:51:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 2500 transitions. [2018-10-22 15:51:55,210 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 2500 transitions. Word has length 213 [2018-10-22 15:51:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:55,210 INFO L481 AbstractCegarLoop]: Abstraction has 2249 states and 2500 transitions. [2018-10-22 15:51:55,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:51:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 2500 transitions. [2018-10-22 15:51:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-22 15:51:55,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:55,213 INFO L375 BasicCegarLoop]: trace histogram [52, 50, 50, 48, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:55,214 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:55,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash -998658784, now seen corresponding path program 3 times [2018-10-22 15:51:55,214 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:55,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:55,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:55,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:55,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5108 backedges. 2604 proven. 1250 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2018-10-22 15:51:55,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:55,685 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:55,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:55,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 15:51:55,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:55,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5108 backedges. 98 proven. 2608 refuted. 0 times theorem prover too weak. 2402 trivial. 0 not checked. [2018-10-22 15:51:56,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:56,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2018-10-22 15:51:56,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:51:56,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:51:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=794, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:56,056 INFO L87 Difference]: Start difference. First operand 2249 states and 2500 transitions. Second operand 35 states. [2018-10-22 15:52:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:02,268 INFO L93 Difference]: Finished difference Result 5879 states and 6426 transitions. [2018-10-22 15:52:02,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-22 15:52:02,269 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 221 [2018-10-22 15:52:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:02,282 INFO L225 Difference]: With dead ends: 5879 [2018-10-22 15:52:02,282 INFO L226 Difference]: Without dead ends: 3958 [2018-10-22 15:52:02,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4112 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2812, Invalid=11950, Unknown=0, NotChecked=0, Total=14762 [2018-10-22 15:52:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2018-10-22 15:52:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2343. [2018-10-22 15:52:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2343 states. [2018-10-22 15:52:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 2603 transitions. [2018-10-22 15:52:02,869 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 2603 transitions. Word has length 221 [2018-10-22 15:52:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:02,869 INFO L481 AbstractCegarLoop]: Abstraction has 2343 states and 2603 transitions. [2018-10-22 15:52:02,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:52:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 2603 transitions. [2018-10-22 15:52:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-22 15:52:02,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:02,873 INFO L375 BasicCegarLoop]: trace histogram [81, 78, 78, 75, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-22 15:52:02,873 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:02,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -425570136, now seen corresponding path program 4 times [2018-10-22 15:52:02,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:02,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:02,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:02,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:02,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12505 backedges. 5624 proven. 1352 refuted. 0 times theorem prover too weak. 5529 trivial. 0 not checked. [2018-10-22 15:52:03,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:03,360 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:03,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:03,437 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:03,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:03,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12505 backedges. 5624 proven. 1352 refuted. 0 times theorem prover too weak. 5529 trivial. 0 not checked. [2018-10-22 15:52:03,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:03,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-22 15:52:03,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:52:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:52:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:52:03,551 INFO L87 Difference]: Start difference. First operand 2343 states and 2603 transitions. Second operand 29 states. [2018-10-22 15:52:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:06,708 INFO L93 Difference]: Finished difference Result 5864 states and 6404 transitions. [2018-10-22 15:52:06,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:52:06,709 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 342 [2018-10-22 15:52:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:06,715 INFO L225 Difference]: With dead ends: 5864 [2018-10-22 15:52:06,715 INFO L226 Difference]: Without dead ends: 3867 [2018-10-22 15:52:06,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:52:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2018-10-22 15:52:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 2326. [2018-10-22 15:52:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2326 states. [2018-10-22 15:52:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 2592 transitions. [2018-10-22 15:52:07,365 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 2592 transitions. Word has length 342 [2018-10-22 15:52:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:07,365 INFO L481 AbstractCegarLoop]: Abstraction has 2326 states and 2592 transitions. [2018-10-22 15:52:07,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:52:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 2592 transitions. [2018-10-22 15:52:07,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-22 15:52:07,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:07,368 INFO L375 BasicCegarLoop]: trace histogram [84, 81, 81, 78, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-22 15:52:07,369 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:07,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:07,369 INFO L82 PathProgramCache]: Analyzing trace with hash -997387231, now seen corresponding path program 5 times [2018-10-22 15:52:07,369 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:07,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:07,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:07,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:07,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13471 backedges. 6056 proven. 1458 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-10-22 15:52:08,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:08,527 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:08,542 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:08,739 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-22 15:52:08,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:08,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13471 backedges. 6056 proven. 1458 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-10-22 15:52:08,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:08,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-22 15:52:08,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:52:08,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:52:08,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:52:08,869 INFO L87 Difference]: Start difference. First operand 2326 states and 2592 transitions. Second operand 30 states. [2018-10-22 15:52:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:13,082 INFO L93 Difference]: Finished difference Result 5772 states and 6322 transitions. [2018-10-22 15:52:13,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:52:13,083 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 354 [2018-10-22 15:52:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:13,090 INFO L225 Difference]: With dead ends: 5772 [2018-10-22 15:52:13,091 INFO L226 Difference]: Without dead ends: 3812 [2018-10-22 15:52:13,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:52:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3812 states. [2018-10-22 15:52:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3812 to 2422. [2018-10-22 15:52:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2422 states. [2018-10-22 15:52:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2700 transitions. [2018-10-22 15:52:13,895 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2700 transitions. Word has length 354 [2018-10-22 15:52:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:13,896 INFO L481 AbstractCegarLoop]: Abstraction has 2422 states and 2700 transitions. [2018-10-22 15:52:13,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:52:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2700 transitions. [2018-10-22 15:52:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-10-22 15:52:13,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:13,899 INFO L375 BasicCegarLoop]: trace histogram [87, 84, 84, 81, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-22 15:52:13,899 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:13,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:13,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1708873190, now seen corresponding path program 6 times [2018-10-22 15:52:13,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:13,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:13,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:13,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14473 backedges. 6504 proven. 1568 refuted. 0 times theorem prover too weak. 6401 trivial. 0 not checked. [2018-10-22 15:52:14,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:14,763 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:14,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:14,793 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-22 15:52:14,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:14,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:15,275 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-22 15:52:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14473 backedges. 6623 proven. 1 refuted. 0 times theorem prover too weak. 7849 trivial. 0 not checked. [2018-10-22 15:52:16,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:16,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8] total 37 [2018-10-22 15:52:16,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:52:16,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:52:16,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=850, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:52:16,221 INFO L87 Difference]: Start difference. First operand 2422 states and 2700 transitions. Second operand 37 states. [2018-10-22 15:52:22,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:22,676 INFO L93 Difference]: Finished difference Result 6056 states and 6657 transitions. [2018-10-22 15:52:22,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-22 15:52:22,676 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 366 [2018-10-22 15:52:22,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:22,676 INFO L225 Difference]: With dead ends: 6056 [2018-10-22 15:52:22,676 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:52:22,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3027, Invalid=6479, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:52:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:52:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:52:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:52:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:52:22,682 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 366 [2018-10-22 15:52:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:22,682 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:52:22,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:52:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:52:22,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:52:22,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:52:23,055 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:23,057 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:23,152 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:28,090 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:29,973 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:32,981 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:33,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:35,433 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:39,993 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:52:51,111 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:18,663 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,622 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,632 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,639 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,656 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,663 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,680 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,698 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,705 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:19,712 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,327 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,344 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,351 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,361 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,378 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,401 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:21,418 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,623 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,637 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,644 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,653 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,663 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,686 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,696 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:23,705 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:26,415 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:26,421 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:26,428 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:26,435 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:26,441 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:26,448 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:26,457 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:26,471 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:29,062 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:29,071 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:29,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:29,086 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:29,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:29,108 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:29,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:31,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:31,735 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:31,747 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:31,763 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:31,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,858 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,866 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,874 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,882 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,901 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,929 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,942 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,952 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,982 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:38,992 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:39,002 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:53:53,339 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,326 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,335 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,347 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,356 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,364 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,397 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,406 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,437 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,447 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,461 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,472 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,483 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,507 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:04,542 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,764 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,772 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,780 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,788 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,797 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,808 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,816 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,833 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,841 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,873 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,886 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,896 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,927 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,937 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,951 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:21,964 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:26,525 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:29,982 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:35,374 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:42,454 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:46,017 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:46,166 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:54,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:54:54,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:55:06,250 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:55:06,719 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:55:12,774 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:55:16,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:55:16,902 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:55:18,543 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:55:26,191 WARN L250 erpolLogProxyWrapper]: Already inconsistent. Received shutdown request... [2018-10-22 15:55:26,430 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-22 15:55:26,431 INFO L168 Benchmark]: Toolchain (without parser) took 261454.14 ms. Allocated memory was 1.6 GB in the beginning and 4.3 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -924.6 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-22 15:55:26,432 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:55:26,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.80 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:26,433 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.78 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:55:26,433 INFO L168 Benchmark]: Boogie Preprocessor took 31.00 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:55:26,434 INFO L168 Benchmark]: RCFGBuilder took 410.14 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 760.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -801.0 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:26,434 INFO L168 Benchmark]: TraceAbstraction took 260704.53 ms. Allocated memory was 2.3 GB in the beginning and 4.3 GB in the end (delta: 1.9 GB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -134.2 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-22 15:55:26,438 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.80 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.78 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.00 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 410.14 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 760.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -801.0 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 260704.53 ms. Allocated memory was 2.3 GB in the beginning and 4.3 GB in the end (delta: 1.9 GB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -134.2 MB). 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: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 6775. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown