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 0.1.23-1dbac8b [2018-10-26 22:33:38,555 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:33:38,557 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:33:38,574 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:33:38,575 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:33:38,576 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:33:38,577 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:33:38,580 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:33:38,582 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:33:38,584 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:33:38,585 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:33:38,585 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:33:38,587 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:33:38,588 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:33:38,591 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:33:38,599 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:33:38,600 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:33:38,603 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:33:38,605 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:33:38,607 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:33:38,610 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:33:38,611 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:33:38,613 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 22:33:38,621 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 [2018-10-26 22:33:38,634 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:33:38,635 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:33:38,636 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:33:38,636 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:33:38,636 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:33:38,636 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:33:38,637 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:33:38,637 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:33:38,637 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:33:38,637 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:33:38,638 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:33:38,638 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:33:38,638 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:33:38,638 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:33:38,638 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:33:38,639 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:33:38,639 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:33:38,639 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:33:38,639 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:33:38,639 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:33:38,640 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:33:38,640 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:33:38,640 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:33:38,640 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:33:38,640 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:33:38,640 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:33:38,641 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:33:38,641 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:33:38,682 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:33:38,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:33:38,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:33:38,698 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:33:38,699 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:33:38,700 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-10-26 22:33:38,763 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3ac8bedbe/8e08d4aed27c4cb9a956985d5ed06fd0/FLAG3594c3ec4 [2018-10-26 22:33:39,192 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:33:39,193 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-10-26 22:33:39,198 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3ac8bedbe/8e08d4aed27c4cb9a956985d5ed06fd0/FLAG3594c3ec4 [2018-10-26 22:33:39,212 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3ac8bedbe/8e08d4aed27c4cb9a956985d5ed06fd0 [2018-10-26 22:33:39,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:33:39,224 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:33:39,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:33:39,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:33:39,229 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:33:39,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed6ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39, skipping insertion in model container [2018-10-26 22:33:39,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:33:39,265 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:33:39,447 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:33:39,451 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:33:39,471 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:33:39,488 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:33:39,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39 WrapperNode [2018-10-26 22:33:39,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:33:39,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:33:39,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:33:39,490 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:33:39,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:33:39,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:33:39,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:33:39,529 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:33:39,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (1/1) ... [2018-10-26 22:33:39,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:33:39,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:33:39,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:33:39,552 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:33:39,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (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 [2018-10-26 22:33:39,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:33:39,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:33:40,038 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:33:40,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:33:40 BoogieIcfgContainer [2018-10-26 22:33:40,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:33:40,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:33:40,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:33:40,043 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:33:40,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:33:39" (1/3) ... [2018-10-26 22:33:40,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342269e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:33:40, skipping insertion in model container [2018-10-26 22:33:40,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:39" (2/3) ... [2018-10-26 22:33:40,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342269e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:33:40, skipping insertion in model container [2018-10-26 22:33:40,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:33:40" (3/3) ... [2018-10-26 22:33:40,047 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call.c [2018-10-26 22:33:40,065 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:33:40,087 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:33:40,121 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:33:40,159 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:33:40,160 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:33:40,160 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:33:40,160 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:33:40,160 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:33:40,160 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:33:40,161 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:33:40,161 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:33:40,161 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:33:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-26 22:33:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 22:33:40,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:40,185 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:40,188 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:40,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:40,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1650387823, now seen corresponding path program 1 times [2018-10-26 22:33:40,196 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:40,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:40,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:40,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:40,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:40,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:33:40,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:33:40,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:33:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:33:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:33:40,354 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-26 22:33:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:40,373 INFO L93 Difference]: Finished difference Result 32 states and 47 transitions. [2018-10-26 22:33:40,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:33:40,376 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-26 22:33:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:40,386 INFO L225 Difference]: With dead ends: 32 [2018-10-26 22:33:40,386 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 22:33:40,390 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 [2018-10-26 22:33:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 22:33:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 22:33:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 22:33:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2018-10-26 22:33:40,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2018-10-26 22:33:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:40,433 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-10-26 22:33:40,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:33:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2018-10-26 22:33:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 22:33:40,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:40,435 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:40,436 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:40,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash 402334944, now seen corresponding path program 1 times [2018-10-26 22:33:40,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:40,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:40,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:40,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:40,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:40,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:33:40,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 22:33:40,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 22:33:40,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 22:33:40,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:33:40,566 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2018-10-26 22:33:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:40,718 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2018-10-26 22:33:40,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:33:40,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-26 22:33:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:40,720 INFO L225 Difference]: With dead ends: 35 [2018-10-26 22:33:40,720 INFO L226 Difference]: Without dead ends: 22 [2018-10-26 22:33:40,721 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 [2018-10-26 22:33:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-26 22:33:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2018-10-26 22:33:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 22:33:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2018-10-26 22:33:40,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2018-10-26 22:33:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:40,727 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-10-26 22:33:40,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 22:33:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2018-10-26 22:33:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 22:33:40,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:40,728 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:40,729 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:40,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:40,730 INFO L82 PathProgramCache]: Analyzing trace with hash -272604169, now seen corresponding path program 1 times [2018-10-26 22:33:40,730 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:40,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:40,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:40,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:40,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:40,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:40,788 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 [2018-10-26 22:33:40,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:40,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:33:40,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:40,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-26 22:33:40,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:33:40,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:33:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:33:40,905 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2018-10-26 22:33:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:41,295 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2018-10-26 22:33:41,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:33:41,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-26 22:33:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:41,297 INFO L225 Difference]: With dead ends: 49 [2018-10-26 22:33:41,297 INFO L226 Difference]: Without dead ends: 34 [2018-10-26 22:33:41,298 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 [2018-10-26 22:33:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-26 22:33:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2018-10-26 22:33:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-26 22:33:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2018-10-26 22:33:41,305 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2018-10-26 22:33:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:41,306 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2018-10-26 22:33:41,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:33:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2018-10-26 22:33:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:33:41,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:41,308 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:41,308 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:41,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:41,309 INFO L82 PathProgramCache]: Analyzing trace with hash -703387572, now seen corresponding path program 1 times [2018-10-26 22:33:41,309 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:41,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:41,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:41,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:41,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:41,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:41,450 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) [2018-10-26 22:33:41,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:41,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:41,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:41,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-10-26 22:33:41,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:33:41,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:33:41,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:33:41,552 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2018-10-26 22:33:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:41,912 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2018-10-26 22:33:41,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:33:41,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-10-26 22:33:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:41,916 INFO L225 Difference]: With dead ends: 83 [2018-10-26 22:33:41,917 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 22:33:41,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:33:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 22:33:41,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2018-10-26 22:33:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-26 22:33:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-10-26 22:33:41,926 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 20 [2018-10-26 22:33:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:41,927 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-10-26 22:33:41,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:33:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-10-26 22:33:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-26 22:33:41,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:41,928 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:41,929 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:41,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1205750631, now seen corresponding path program 1 times [2018-10-26 22:33:41,929 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:41,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:41,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:41,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:41,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:42,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:42,029 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 [2018-10-26 22:33:42,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:42,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:42,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:42,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 22:33:42,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:33:42,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:33:42,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:33:42,101 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2018-10-26 22:33:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:42,375 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2018-10-26 22:33:42,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:33:42,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-10-26 22:33:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:42,380 INFO L225 Difference]: With dead ends: 89 [2018-10-26 22:33:42,381 INFO L226 Difference]: Without dead ends: 53 [2018-10-26 22:33:42,381 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 [2018-10-26 22:33:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-26 22:33:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2018-10-26 22:33:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-26 22:33:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2018-10-26 22:33:42,393 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 24 [2018-10-26 22:33:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:42,393 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2018-10-26 22:33:42,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:33:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2018-10-26 22:33:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-26 22:33:42,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:42,398 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:42,399 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:42,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -304718848, now seen corresponding path program 2 times [2018-10-26 22:33:42,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:42,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:42,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:42,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:42,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:42,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:42,620 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 [2018-10-26 22:33:42,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:42,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:42,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:42,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-26 22:33:42,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:42,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2018-10-26 22:33:42,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:33:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:33:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:33:42,720 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 9 states. [2018-10-26 22:33:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:43,132 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2018-10-26 22:33:43,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:33:43,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-10-26 22:33:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:43,135 INFO L225 Difference]: With dead ends: 178 [2018-10-26 22:33:43,135 INFO L226 Difference]: Without dead ends: 134 [2018-10-26 22:33:43,136 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 [2018-10-26 22:33:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-26 22:33:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2018-10-26 22:33:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-26 22:33:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2018-10-26 22:33:43,150 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 28 [2018-10-26 22:33:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:43,151 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2018-10-26 22:33:43,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:33:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2018-10-26 22:33:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 22:33:43,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:43,153 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:43,153 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:43,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:43,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1043421413, now seen corresponding path program 1 times [2018-10-26 22:33:43,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:43,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:43,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:43,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:43,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:43,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:43,383 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 [2018-10-26 22:33:43,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:43,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:43,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:43,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 22:33:43,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:33:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:33:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:33:43,444 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 8 states. [2018-10-26 22:33:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:43,799 INFO L93 Difference]: Finished difference Result 279 states and 323 transitions. [2018-10-26 22:33:43,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:33:43,801 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-10-26 22:33:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:43,803 INFO L225 Difference]: With dead ends: 279 [2018-10-26 22:33:43,803 INFO L226 Difference]: Without dead ends: 183 [2018-10-26 22:33:43,805 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 [2018-10-26 22:33:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-26 22:33:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2018-10-26 22:33:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-26 22:33:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2018-10-26 22:33:43,834 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 32 [2018-10-26 22:33:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:43,835 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2018-10-26 22:33:43,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:33:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2018-10-26 22:33:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-26 22:33:43,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:43,836 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:43,837 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:43,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:43,837 INFO L82 PathProgramCache]: Analyzing trace with hash -744681804, now seen corresponding path program 2 times [2018-10-26 22:33:43,837 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:43,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:43,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:43,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:43,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:44,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:44,005 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 [2018-10-26 22:33:44,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:44,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:44,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:44,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:44,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:44,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 22:33:44,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:33:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:33:44,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:33:44,080 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand 9 states. [2018-10-26 22:33:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:44,214 INFO L93 Difference]: Finished difference Result 311 states and 359 transitions. [2018-10-26 22:33:44,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:33:44,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-10-26 22:33:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:44,217 INFO L225 Difference]: With dead ends: 311 [2018-10-26 22:33:44,217 INFO L226 Difference]: Without dead ends: 199 [2018-10-26 22:33:44,218 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 [2018-10-26 22:33:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-26 22:33:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2018-10-26 22:33:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-26 22:33:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2018-10-26 22:33:44,233 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 36 [2018-10-26 22:33:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:44,234 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2018-10-26 22:33:44,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:33:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2018-10-26 22:33:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-26 22:33:44,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:44,236 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:44,236 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:44,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:44,236 INFO L82 PathProgramCache]: Analyzing trace with hash 38535629, now seen corresponding path program 3 times [2018-10-26 22:33:44,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:44,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:44,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:44,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:44,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:44,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:44,354 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 [2018-10-26 22:33:44,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:44,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-26 22:33:44,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:44,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-26 22:33:44,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:44,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2018-10-26 22:33:44,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 22:33:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 22:33:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:33:44,568 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand 16 states. [2018-10-26 22:33:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:45,510 INFO L93 Difference]: Finished difference Result 663 states and 767 transitions. [2018-10-26 22:33:45,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:33:45,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2018-10-26 22:33:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:45,514 INFO L225 Difference]: With dead ends: 663 [2018-10-26 22:33:45,514 INFO L226 Difference]: Without dead ends: 535 [2018-10-26 22:33:45,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:33:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2018-10-26 22:33:45,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 263. [2018-10-26 22:33:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-26 22:33:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 302 transitions. [2018-10-26 22:33:45,551 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 302 transitions. Word has length 40 [2018-10-26 22:33:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:45,551 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 302 transitions. [2018-10-26 22:33:45,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 22:33:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 302 transitions. [2018-10-26 22:33:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-26 22:33:45,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:45,554 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:45,554 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:45,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1908864387, now seen corresponding path program 3 times [2018-10-26 22:33:45,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:45,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:45,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:45,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:45,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:45,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:45,712 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 [2018-10-26 22:33:45,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:45,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-26 22:33:45,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:45,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-10-26 22:33:45,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:45,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2018-10-26 22:33:45,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:33:45,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:33:45,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:33:45,812 INFO L87 Difference]: Start difference. First operand 263 states and 302 transitions. Second operand 14 states. [2018-10-26 22:33:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:47,082 INFO L93 Difference]: Finished difference Result 666 states and 758 transitions. [2018-10-26 22:33:47,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:33:47,083 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2018-10-26 22:33:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:47,089 INFO L225 Difference]: With dead ends: 666 [2018-10-26 22:33:47,090 INFO L226 Difference]: Without dead ends: 512 [2018-10-26 22:33:47,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:33:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2018-10-26 22:33:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 315. [2018-10-26 22:33:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-26 22:33:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 359 transitions. [2018-10-26 22:33:47,127 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 359 transitions. Word has length 48 [2018-10-26 22:33:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:47,127 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 359 transitions. [2018-10-26 22:33:47,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:33:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 359 transitions. [2018-10-26 22:33:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-26 22:33:47,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:47,130 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:47,130 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:47,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:47,130 INFO L82 PathProgramCache]: Analyzing trace with hash -324593642, now seen corresponding path program 4 times [2018-10-26 22:33:47,131 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:47,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:47,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:47,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:47,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:47,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:47,405 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 [2018-10-26 22:33:47,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:47,434 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:47,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:47,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:47,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:47,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-26 22:33:47,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:33:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:33:47,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:33:47,482 INFO L87 Difference]: Start difference. First operand 315 states and 359 transitions. Second operand 13 states. [2018-10-26 22:33:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:47,919 INFO L93 Difference]: Finished difference Result 614 states and 703 transitions. [2018-10-26 22:33:47,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 22:33:47,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-10-26 22:33:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:47,926 INFO L225 Difference]: With dead ends: 614 [2018-10-26 22:33:47,926 INFO L226 Difference]: Without dead ends: 423 [2018-10-26 22:33:47,927 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 [2018-10-26 22:33:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-26 22:33:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 343. [2018-10-26 22:33:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-26 22:33:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 390 transitions. [2018-10-26 22:33:47,960 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 390 transitions. Word has length 52 [2018-10-26 22:33:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:47,960 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 390 transitions. [2018-10-26 22:33:47,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:33:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 390 transitions. [2018-10-26 22:33:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:33:47,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:47,963 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:47,963 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:47,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash -411539409, now seen corresponding path program 5 times [2018-10-26 22:33:47,964 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:47,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:47,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:47,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:47,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:48,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:48,185 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 [2018-10-26 22:33:48,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:48,221 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 22:33:48,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:48,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:48,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:48,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-26 22:33:48,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:33:48,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:33:48,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:33:48,264 INFO L87 Difference]: Start difference. First operand 343 states and 390 transitions. Second operand 14 states. [2018-10-26 22:33:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:48,490 INFO L93 Difference]: Finished difference Result 658 states and 752 transitions. [2018-10-26 22:33:48,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:33:48,493 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2018-10-26 22:33:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:48,496 INFO L225 Difference]: With dead ends: 658 [2018-10-26 22:33:48,496 INFO L226 Difference]: Without dead ends: 451 [2018-10-26 22:33:48,497 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 [2018-10-26 22:33:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-10-26 22:33:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 371. [2018-10-26 22:33:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-10-26 22:33:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 421 transitions. [2018-10-26 22:33:48,533 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 421 transitions. Word has length 56 [2018-10-26 22:33:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:48,534 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 421 transitions. [2018-10-26 22:33:48,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:33:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 421 transitions. [2018-10-26 22:33:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-26 22:33:48,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:48,535 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:48,536 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:48,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2055341000, now seen corresponding path program 6 times [2018-10-26 22:33:48,536 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:48,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:48,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:48,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:48,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:49,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:49,179 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 [2018-10-26 22:33:49,188 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:49,200 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-26 22:33:49,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:49,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:49,635 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 22:33:49,967 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 22:33:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-10-26 22:33:50,338 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:33:50,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 21 [2018-10-26 22:33:50,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 22:33:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 22:33:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:33:50,340 INFO L87 Difference]: Start difference. First operand 371 states and 421 transitions. Second operand 21 states. [2018-10-26 22:33:50,787 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-10-26 22:33:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:53,605 INFO L93 Difference]: Finished difference Result 890 states and 1018 transitions. [2018-10-26 22:33:53,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-26 22:33:53,605 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2018-10-26 22:33:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:53,609 INFO L225 Difference]: With dead ends: 890 [2018-10-26 22:33:53,610 INFO L226 Difference]: Without dead ends: 667 [2018-10-26 22:33:53,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=897, Invalid=2885, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:33:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2018-10-26 22:33:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 411. [2018-10-26 22:33:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-10-26 22:33:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 465 transitions. [2018-10-26 22:33:53,648 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 465 transitions. Word has length 60 [2018-10-26 22:33:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:53,648 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 465 transitions. [2018-10-26 22:33:53,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 22:33:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 465 transitions. [2018-10-26 22:33:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:33:53,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:53,649 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:53,650 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:53,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:53,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1602534976, now seen corresponding path program 1 times [2018-10-26 22:33:53,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:53,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:53,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:53,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:53,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-26 22:33:53,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:33:53,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 22:33:53,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 22:33:53,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 22:33:53,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:33:53,758 INFO L87 Difference]: Start difference. First operand 411 states and 465 transitions. Second operand 4 states. [2018-10-26 22:33:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:53,811 INFO L93 Difference]: Finished difference Result 655 states and 744 transitions. [2018-10-26 22:33:53,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:33:53,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2018-10-26 22:33:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:53,819 INFO L225 Difference]: With dead ends: 655 [2018-10-26 22:33:53,819 INFO L226 Difference]: Without dead ends: 427 [2018-10-26 22:33:53,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:33:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-26 22:33:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 407. [2018-10-26 22:33:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-26 22:33:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 459 transitions. [2018-10-26 22:33:53,857 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 459 transitions. Word has length 68 [2018-10-26 22:33:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:53,858 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 459 transitions. [2018-10-26 22:33:53,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 22:33:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 459 transitions. [2018-10-26 22:33:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-26 22:33:53,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:53,860 INFO L375 BasicCegarLoop]: trace histogram [29, 27, 27, 25, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:53,860 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:53,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1528765977, now seen corresponding path program 1 times [2018-10-26 22:33:53,861 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:53,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:53,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:53,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:53,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 786 proven. 392 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-26 22:33:54,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:54,168 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 [2018-10-26 22:33:54,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:54,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 786 proven. 392 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-26 22:33:54,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:54,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-26 22:33:54,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:33:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:33:54,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:33:54,264 INFO L87 Difference]: Start difference. First operand 407 states and 459 transitions. Second operand 17 states. [2018-10-26 22:33:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:54,574 INFO L93 Difference]: Finished difference Result 784 states and 892 transitions. [2018-10-26 22:33:54,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:33:54,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2018-10-26 22:33:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:54,577 INFO L225 Difference]: With dead ends: 784 [2018-10-26 22:33:54,577 INFO L226 Difference]: Without dead ends: 549 [2018-10-26 22:33:54,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:33:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2018-10-26 22:33:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 451. [2018-10-26 22:33:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-10-26 22:33:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 508 transitions. [2018-10-26 22:33:54,620 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 508 transitions. Word has length 129 [2018-10-26 22:33:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:54,621 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 508 transitions. [2018-10-26 22:33:54,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:33:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 508 transitions. [2018-10-26 22:33:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-26 22:33:54,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:54,623 INFO L375 BasicCegarLoop]: trace histogram [32, 30, 30, 28, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:54,623 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:54,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:54,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1089261280, now seen corresponding path program 2 times [2018-10-26 22:33:54,624 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:54,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:54,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:54,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:54,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 964 proven. 450 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2018-10-26 22:33:54,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:54,978 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 [2018-10-26 22:33:54,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:55,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:55,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:55,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 964 proven. 450 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2018-10-26 22:33:55,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:55,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-26 22:33:55,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 22:33:55,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 22:33:55,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:33:55,072 INFO L87 Difference]: Start difference. First operand 451 states and 508 transitions. Second operand 18 states. [2018-10-26 22:33:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:55,377 INFO L93 Difference]: Finished difference Result 826 states and 936 transitions. [2018-10-26 22:33:55,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:33:55,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2018-10-26 22:33:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:55,381 INFO L225 Difference]: With dead ends: 826 [2018-10-26 22:33:55,381 INFO L226 Difference]: Without dead ends: 559 [2018-10-26 22:33:55,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:33:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-10-26 22:33:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 479. [2018-10-26 22:33:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-10-26 22:33:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 539 transitions. [2018-10-26 22:33:55,425 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 539 transitions. Word has length 141 [2018-10-26 22:33:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:55,425 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 539 transitions. [2018-10-26 22:33:55,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 22:33:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 539 transitions. [2018-10-26 22:33:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-26 22:33:55,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:55,428 INFO L375 BasicCegarLoop]: trace histogram [34, 32, 32, 30, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:55,428 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:55,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:55,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1922033728, now seen corresponding path program 3 times [2018-10-26 22:33:55,428 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:55,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:55,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:55,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:55,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 1092 proven. 512 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2018-10-26 22:33:55,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:55,663 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 [2018-10-26 22:33:55,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:55,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-26 22:33:55,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:55,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 62 proven. 1096 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-10-26 22:33:56,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:56,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2018-10-26 22:33:56,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:33:56,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:33:56,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:33:56,078 INFO L87 Difference]: Start difference. First operand 479 states and 539 transitions. Second operand 26 states. [2018-10-26 22:33:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:57,868 INFO L93 Difference]: Finished difference Result 1605 states and 1821 transitions. [2018-10-26 22:33:57,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-26 22:33:57,868 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2018-10-26 22:33:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:57,874 INFO L225 Difference]: With dead ends: 1605 [2018-10-26 22:33:57,874 INFO L226 Difference]: Without dead ends: 1322 [2018-10-26 22:33:57,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1248, Invalid=4758, Unknown=0, NotChecked=0, Total=6006 [2018-10-26 22:33:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2018-10-26 22:33:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 811. [2018-10-26 22:33:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2018-10-26 22:33:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 916 transitions. [2018-10-26 22:33:57,962 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 916 transitions. Word has length 149 [2018-10-26 22:33:57,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:57,962 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 916 transitions. [2018-10-26 22:33:57,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:33:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 916 transitions. [2018-10-26 22:33:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-26 22:33:57,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:57,964 INFO L375 BasicCegarLoop]: trace histogram [36, 34, 34, 32, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:57,965 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:57,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash 185234210, now seen corresponding path program 1 times [2018-10-26 22:33:57,965 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:57,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:57,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:57,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:57,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 1228 proven. 578 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2018-10-26 22:33:58,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:58,671 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 [2018-10-26 22:33:58,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:58,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 1228 proven. 578 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2018-10-26 22:33:58,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:58,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-26 22:33:58,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 22:33:58,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 22:33:58,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:33:58,762 INFO L87 Difference]: Start difference. First operand 811 states and 916 transitions. Second operand 20 states. [2018-10-26 22:33:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:59,031 INFO L93 Difference]: Finished difference Result 1574 states and 1780 transitions. [2018-10-26 22:33:59,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:33:59,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 157 [2018-10-26 22:33:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:59,034 INFO L225 Difference]: With dead ends: 1574 [2018-10-26 22:33:59,035 INFO L226 Difference]: Without dead ends: 971 [2018-10-26 22:33:59,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:33:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2018-10-26 22:33:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 839. [2018-10-26 22:33:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2018-10-26 22:33:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 947 transitions. [2018-10-26 22:33:59,140 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 947 transitions. Word has length 157 [2018-10-26 22:33:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:59,140 INFO L481 AbstractCegarLoop]: Abstraction has 839 states and 947 transitions. [2018-10-26 22:33:59,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 22:33:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 947 transitions. [2018-10-26 22:33:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-26 22:33:59,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:59,143 INFO L375 BasicCegarLoop]: trace histogram [38, 36, 36, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:59,143 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:59,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:59,144 INFO L82 PathProgramCache]: Analyzing trace with hash -359223042, now seen corresponding path program 2 times [2018-10-26 22:33:59,145 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:59,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:59,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:59,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:59,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 1372 proven. 648 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-10-26 22:34:00,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:00,137 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 [2018-10-26 22:34:00,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:34:00,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:34:00,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:00,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 6 proven. 250 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2018-10-26 22:34:00,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:00,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6] total 23 [2018-10-26 22:34:00,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 22:34:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 22:34:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:34:00,312 INFO L87 Difference]: Start difference. First operand 839 states and 947 transitions. Second operand 23 states. [2018-10-26 22:34:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:01,884 INFO L93 Difference]: Finished difference Result 3963 states and 4287 transitions. [2018-10-26 22:34:01,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 22:34:01,884 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2018-10-26 22:34:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:01,894 INFO L225 Difference]: With dead ends: 3963 [2018-10-26 22:34:01,894 INFO L226 Difference]: Without dead ends: 3344 [2018-10-26 22:34:01,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=633, Invalid=1089, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:34:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2018-10-26 22:34:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 871. [2018-10-26 22:34:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2018-10-26 22:34:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 984 transitions. [2018-10-26 22:34:02,204 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 984 transitions. Word has length 165 [2018-10-26 22:34:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:02,204 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 984 transitions. [2018-10-26 22:34:02,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 22:34:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 984 transitions. [2018-10-26 22:34:02,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-26 22:34:02,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:02,207 INFO L375 BasicCegarLoop]: trace histogram [40, 38, 38, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:02,208 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:02,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1010720098, now seen corresponding path program 3 times [2018-10-26 22:34:02,208 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:02,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:02,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:02,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:02,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2972 backedges. 1524 proven. 722 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2018-10-26 22:34:02,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:02,493 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 [2018-10-26 22:34:02,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:34:02,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-26 22:34:02,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:02,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:02,797 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 22:34:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2972 backedges. 74 proven. 1528 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2018-10-26 22:34:03,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:03,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2018-10-26 22:34:03,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:34:03,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:34:03,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:34:03,104 INFO L87 Difference]: Start difference. First operand 871 states and 984 transitions. Second operand 29 states. [2018-10-26 22:34:04,648 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-26 22:34:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:08,927 INFO L93 Difference]: Finished difference Result 3286 states and 3549 transitions. [2018-10-26 22:34:08,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-26 22:34:08,928 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2018-10-26 22:34:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:08,937 INFO L225 Difference]: With dead ends: 3286 [2018-10-26 22:34:08,937 INFO L226 Difference]: Without dead ends: 2643 [2018-10-26 22:34:08,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3621 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2388, Invalid=9822, Unknown=0, NotChecked=0, Total=12210 [2018-10-26 22:34:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2018-10-26 22:34:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 931. [2018-10-26 22:34:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 931 states. [2018-10-26 22:34:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1051 transitions. [2018-10-26 22:34:09,235 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1051 transitions. Word has length 173 [2018-10-26 22:34:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:09,235 INFO L481 AbstractCegarLoop]: Abstraction has 931 states and 1051 transitions. [2018-10-26 22:34:09,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:34:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1051 transitions. [2018-10-26 22:34:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-26 22:34:09,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:09,239 INFO L375 BasicCegarLoop]: trace histogram [42, 40, 40, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:09,240 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:09,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1162401790, now seen corresponding path program 4 times [2018-10-26 22:34:09,240 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:09,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:09,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:09,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:09,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3288 backedges. 1684 proven. 800 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2018-10-26 22:34:09,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:09,664 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 [2018-10-26 22:34:09,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:09,701 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:09,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:09,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3288 backedges. 2428 proven. 119 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2018-10-26 22:34:10,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:10,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2018-10-26 22:34:10,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:34:10,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:34:10,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1471, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:34:10,151 INFO L87 Difference]: Start difference. First operand 931 states and 1051 transitions. Second operand 45 states. [2018-10-26 22:34:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:14,224 INFO L93 Difference]: Finished difference Result 3444 states and 3754 transitions. [2018-10-26 22:34:14,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-26 22:34:14,224 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 181 [2018-10-26 22:34:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:14,234 INFO L225 Difference]: With dead ends: 3444 [2018-10-26 22:34:14,234 INFO L226 Difference]: Without dead ends: 2753 [2018-10-26 22:34:14,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1586, Invalid=6070, Unknown=0, NotChecked=0, Total=7656 [2018-10-26 22:34:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2018-10-26 22:34:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1409. [2018-10-26 22:34:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1409 states. [2018-10-26 22:34:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1548 transitions. [2018-10-26 22:34:14,784 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1548 transitions. Word has length 181 [2018-10-26 22:34:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:14,785 INFO L481 AbstractCegarLoop]: Abstraction has 1409 states and 1548 transitions. [2018-10-26 22:34:14,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:34:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1548 transitions. [2018-10-26 22:34:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-26 22:34:14,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:14,788 INFO L375 BasicCegarLoop]: trace histogram [44, 42, 42, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:14,788 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:14,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:14,789 INFO L82 PathProgramCache]: Analyzing trace with hash -646928222, now seen corresponding path program 5 times [2018-10-26 22:34:14,789 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:14,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:14,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:14,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:14,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 1852 proven. 882 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-10-26 22:34:15,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:15,123 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 [2018-10-26 22:34:15,130 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:34:15,169 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-26 22:34:15,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:15,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 1852 proven. 882 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-10-26 22:34:15,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:15,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-26 22:34:15,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 22:34:15,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 22:34:15,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:34:15,223 INFO L87 Difference]: Start difference. First operand 1409 states and 1548 transitions. Second operand 24 states. [2018-10-26 22:34:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:18,117 INFO L93 Difference]: Finished difference Result 4037 states and 4325 transitions. [2018-10-26 22:34:18,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:34:18,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2018-10-26 22:34:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:18,128 INFO L225 Difference]: With dead ends: 4037 [2018-10-26 22:34:18,129 INFO L226 Difference]: Without dead ends: 2887 [2018-10-26 22:34:18,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:34:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2018-10-26 22:34:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1477. [2018-10-26 22:34:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1477 states. [2018-10-26 22:34:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1624 transitions. [2018-10-26 22:34:18,542 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1624 transitions. Word has length 189 [2018-10-26 22:34:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:18,543 INFO L481 AbstractCegarLoop]: Abstraction has 1477 states and 1624 transitions. [2018-10-26 22:34:18,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 22:34:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1624 transitions. [2018-10-26 22:34:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-26 22:34:18,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:18,545 INFO L375 BasicCegarLoop]: trace histogram [46, 44, 44, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:18,546 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:18,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1041308350, now seen corresponding path program 6 times [2018-10-26 22:34:18,546 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:18,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:18,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:18,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:18,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 2028 proven. 968 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2018-10-26 22:34:19,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:19,007 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 [2018-10-26 22:34:19,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:34:19,032 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-26 22:34:19,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:19,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 86 proven. 2032 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2018-10-26 22:34:19,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:19,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2018-10-26 22:34:19,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 22:34:19,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 22:34:19,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:34:19,267 INFO L87 Difference]: Start difference. First operand 1477 states and 1624 transitions. Second operand 32 states. [2018-10-26 22:34:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:24,331 INFO L93 Difference]: Finished difference Result 4413 states and 4744 transitions. [2018-10-26 22:34:24,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-26 22:34:24,332 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 197 [2018-10-26 22:34:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:24,340 INFO L225 Difference]: With dead ends: 4413 [2018-10-26 22:34:24,340 INFO L226 Difference]: Without dead ends: 3211 [2018-10-26 22:34:24,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2163, Invalid=8139, Unknown=0, NotChecked=0, Total=10302 [2018-10-26 22:34:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2018-10-26 22:34:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 1657. [2018-10-26 22:34:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2018-10-26 22:34:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 1820 transitions. [2018-10-26 22:34:24,783 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 1820 transitions. Word has length 197 [2018-10-26 22:34:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:24,783 INFO L481 AbstractCegarLoop]: Abstraction has 1657 states and 1820 transitions. [2018-10-26 22:34:24,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 22:34:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 1820 transitions. [2018-10-26 22:34:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-26 22:34:24,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:24,786 INFO L375 BasicCegarLoop]: trace histogram [49, 47, 47, 45, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:24,787 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:24,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:24,787 INFO L82 PathProgramCache]: Analyzing trace with hash -179235847, now seen corresponding path program 1 times [2018-10-26 22:34:24,787 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:24,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:24,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:24,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:24,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4520 backedges. 2306 proven. 1058 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-26 22:34:25,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:25,214 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 [2018-10-26 22:34:25,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:25,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4520 backedges. 2306 proven. 1058 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-26 22:34:25,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:25,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-26 22:34:25,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:34:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:34:25,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:34:25,322 INFO L87 Difference]: Start difference. First operand 1657 states and 1820 transitions. Second operand 26 states. [2018-10-26 22:34:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:27,661 INFO L93 Difference]: Finished difference Result 4499 states and 4834 transitions. [2018-10-26 22:34:27,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:34:27,661 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 209 [2018-10-26 22:34:27,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:27,670 INFO L225 Difference]: With dead ends: 4499 [2018-10-26 22:34:27,670 INFO L226 Difference]: Without dead ends: 3133 [2018-10-26 22:34:27,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:34:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2018-10-26 22:34:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 1721. [2018-10-26 22:34:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1721 states. [2018-10-26 22:34:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 1892 transitions. [2018-10-26 22:34:28,146 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 1892 transitions. Word has length 209 [2018-10-26 22:34:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:28,146 INFO L481 AbstractCegarLoop]: Abstraction has 1721 states and 1892 transitions. [2018-10-26 22:34:28,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:34:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 1892 transitions. [2018-10-26 22:34:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-26 22:34:28,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:28,150 INFO L375 BasicCegarLoop]: trace histogram [50, 48, 48, 46, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:28,150 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:28,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1355868544, now seen corresponding path program 2 times [2018-10-26 22:34:28,150 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:28,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:28,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:28,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:28,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4712 backedges. 2404 proven. 1152 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-26 22:34:28,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:28,667 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 [2018-10-26 22:34:28,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:34:28,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:34:28,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:28,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4712 backedges. 6 proven. 3480 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2018-10-26 22:34:28,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:28,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2018-10-26 22:34:28,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:34:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:34:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:34:28,850 INFO L87 Difference]: Start difference. First operand 1721 states and 1892 transitions. Second operand 29 states. [2018-10-26 22:34:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:32,275 INFO L93 Difference]: Finished difference Result 5053 states and 5484 transitions. [2018-10-26 22:34:32,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-26 22:34:32,275 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 213 [2018-10-26 22:34:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:32,285 INFO L225 Difference]: With dead ends: 5053 [2018-10-26 22:34:32,285 INFO L226 Difference]: Without dead ends: 3639 [2018-10-26 22:34:32,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1056, Invalid=1806, Unknown=0, NotChecked=0, Total=2862 [2018-10-26 22:34:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2018-10-26 22:34:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2249. [2018-10-26 22:34:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2249 states. [2018-10-26 22:34:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 2500 transitions. [2018-10-26 22:34:32,844 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 2500 transitions. Word has length 213 [2018-10-26 22:34:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:32,845 INFO L481 AbstractCegarLoop]: Abstraction has 2249 states and 2500 transitions. [2018-10-26 22:34:32,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:34:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 2500 transitions. [2018-10-26 22:34:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-26 22:34:32,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:32,848 INFO L375 BasicCegarLoop]: trace histogram [52, 50, 50, 48, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:32,848 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:32,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:32,848 INFO L82 PathProgramCache]: Analyzing trace with hash -998658784, now seen corresponding path program 3 times [2018-10-26 22:34:32,848 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:32,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:32,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:32,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:32,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5108 backedges. 2604 proven. 1250 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2018-10-26 22:34:33,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:33,335 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 [2018-10-26 22:34:33,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:34:33,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-26 22:34:33,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:33,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5108 backedges. 98 proven. 2608 refuted. 0 times theorem prover too weak. 2402 trivial. 0 not checked. [2018-10-26 22:34:33,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:33,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2018-10-26 22:34:33,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 22:34:33,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 22:34:33,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=794, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:34:33,649 INFO L87 Difference]: Start difference. First operand 2249 states and 2500 transitions. Second operand 35 states. [2018-10-26 22:34:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:39,943 INFO L93 Difference]: Finished difference Result 5879 states and 6426 transitions. [2018-10-26 22:34:39,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-26 22:34:39,944 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 221 [2018-10-26 22:34:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:39,958 INFO L225 Difference]: With dead ends: 5879 [2018-10-26 22:34:39,958 INFO L226 Difference]: Without dead ends: 3958 [2018-10-26 22:34:39,961 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 [2018-10-26 22:34:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2018-10-26 22:34:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2343. [2018-10-26 22:34:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2343 states. [2018-10-26 22:34:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 2603 transitions. [2018-10-26 22:34:40,550 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 2603 transitions. Word has length 221 [2018-10-26 22:34:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:40,550 INFO L481 AbstractCegarLoop]: Abstraction has 2343 states and 2603 transitions. [2018-10-26 22:34:40,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 22:34:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 2603 transitions. [2018-10-26 22:34:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-26 22:34:40,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:40,555 INFO L375 BasicCegarLoop]: trace histogram [81, 78, 78, 75, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-26 22:34:40,555 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:40,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:40,556 INFO L82 PathProgramCache]: Analyzing trace with hash -425570136, now seen corresponding path program 4 times [2018-10-26 22:34:40,556 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:40,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:40,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:40,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:40,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12505 backedges. 5624 proven. 1352 refuted. 0 times theorem prover too weak. 5529 trivial. 0 not checked. [2018-10-26 22:34:41,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:41,050 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 [2018-10-26 22:34:41,060 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:41,127 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:41,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:41,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12505 backedges. 5624 proven. 1352 refuted. 0 times theorem prover too weak. 5529 trivial. 0 not checked. [2018-10-26 22:34:41,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:41,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-26 22:34:41,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:34:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:34:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:34:41,240 INFO L87 Difference]: Start difference. First operand 2343 states and 2603 transitions. Second operand 29 states. [2018-10-26 22:34:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:44,437 INFO L93 Difference]: Finished difference Result 5864 states and 6404 transitions. [2018-10-26 22:34:44,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:34:44,437 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 342 [2018-10-26 22:34:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:44,444 INFO L225 Difference]: With dead ends: 5864 [2018-10-26 22:34:44,444 INFO L226 Difference]: Without dead ends: 3867 [2018-10-26 22:34:44,446 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 [2018-10-26 22:34:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2018-10-26 22:34:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 2326. [2018-10-26 22:34:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2326 states. [2018-10-26 22:34:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 2592 transitions. [2018-10-26 22:34:45,123 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 2592 transitions. Word has length 342 [2018-10-26 22:34:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:45,123 INFO L481 AbstractCegarLoop]: Abstraction has 2326 states and 2592 transitions. [2018-10-26 22:34:45,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:34:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 2592 transitions. [2018-10-26 22:34:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-26 22:34:45,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:45,127 INFO L375 BasicCegarLoop]: trace histogram [84, 81, 81, 78, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-26 22:34:45,127 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:45,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash -997387231, now seen corresponding path program 5 times [2018-10-26 22:34:45,127 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:45,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:45,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:45,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:45,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13471 backedges. 6056 proven. 1458 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-10-26 22:34:46,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:46,204 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 [2018-10-26 22:34:46,218 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:34:46,463 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-26 22:34:46,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:46,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13471 backedges. 6056 proven. 1458 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-10-26 22:34:46,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:46,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-26 22:34:46,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-26 22:34:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-26 22:34:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:34:46,636 INFO L87 Difference]: Start difference. First operand 2326 states and 2592 transitions. Second operand 30 states. [2018-10-26 22:34:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:49,807 INFO L93 Difference]: Finished difference Result 5772 states and 6322 transitions. [2018-10-26 22:34:49,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 22:34:49,807 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 354 [2018-10-26 22:34:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:49,813 INFO L225 Difference]: With dead ends: 5772 [2018-10-26 22:34:49,813 INFO L226 Difference]: Without dead ends: 3812 [2018-10-26 22:34:49,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:34:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3812 states. [2018-10-26 22:34:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3812 to 2422. [2018-10-26 22:34:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2422 states. [2018-10-26 22:34:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2700 transitions. [2018-10-26 22:34:50,595 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2700 transitions. Word has length 354 [2018-10-26 22:34:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:50,595 INFO L481 AbstractCegarLoop]: Abstraction has 2422 states and 2700 transitions. [2018-10-26 22:34:50,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-26 22:34:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2700 transitions. [2018-10-26 22:34:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-10-26 22:34:50,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:50,598 INFO L375 BasicCegarLoop]: trace histogram [87, 84, 84, 81, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-26 22:34:50,598 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:50,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:50,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1708873190, now seen corresponding path program 6 times [2018-10-26 22:34:50,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:50,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:50,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:50,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:50,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14473 backedges. 6504 proven. 1568 refuted. 0 times theorem prover too weak. 6401 trivial. 0 not checked. [2018-10-26 22:34:51,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:51,106 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 [2018-10-26 22:34:51,114 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:34:51,147 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-26 22:34:51,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:51,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:51,646 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 22:34:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14473 backedges. 6623 proven. 1 refuted. 0 times theorem prover too weak. 7849 trivial. 0 not checked. [2018-10-26 22:34:52,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:52,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8] total 37 [2018-10-26 22:34:52,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:34:52,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:34:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=850, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:34:52,328 INFO L87 Difference]: Start difference. First operand 2422 states and 2700 transitions. Second operand 37 states. [2018-10-26 22:34:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:59,135 INFO L93 Difference]: Finished difference Result 6056 states and 6657 transitions. [2018-10-26 22:34:59,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-26 22:34:59,136 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 366 [2018-10-26 22:34:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:59,136 INFO L225 Difference]: With dead ends: 6056 [2018-10-26 22:34:59,136 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 22:34:59,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3027, Invalid=6479, Unknown=0, NotChecked=0, Total=9506 [2018-10-26 22:34:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 22:34:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 22:34:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 22:34:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 22:34:59,141 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 366 [2018-10-26 22:34:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:59,142 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 22:34:59,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:34:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 22:34:59,142 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 22:34:59,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 22:34:59,917 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:34:59,925 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:00,041 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:04,793 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:05,960 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:08,931 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:09,032 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:11,404 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:15,881 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:26,414 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:51,347 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,325 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,336 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,343 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,359 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,367 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,409 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:52,416 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,032 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,049 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,055 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,065 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,072 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,082 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,089 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,098 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:54,122 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,332 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,339 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,348 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,358 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,365 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,380 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:56,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:59,177 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:59,184 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:59,190 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:59,197 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:59,204 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:59,211 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:59,220 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:35:59,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:01,937 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:01,946 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:01,956 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:01,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:01,969 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:01,984 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:01,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:04,634 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:04,641 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:04,649 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:04,659 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:04,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,177 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,185 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,193 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,201 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,221 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,250 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,264 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,274 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,284 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,305 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:12,326 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:27,123 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,917 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,926 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,938 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,947 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,956 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,965 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,977 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,989 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:38,998 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:39,031 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:39,042 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:39,056 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:39,068 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:39,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:39,104 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:39,139 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,702 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,711 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,719 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,727 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,735 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,746 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,754 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,762 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,771 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,810 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,823 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,833 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,843 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,864 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,874 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,887 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:36:56,900 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:01,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:05,013 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:10,519 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:17,778 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:21,550 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:21,703 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:30,967 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:31,086 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:42,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:42,803 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:49,063 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:52,249 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:52,754 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 22:37:54,176 WARN L250 erpolLogProxyWrapper]: Already inconsistent. Received shutdown request... [2018-10-26 22:37:59,585 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-26 22:37:59,587 INFO L168 Benchmark]: Toolchain (without parser) took 260363.51 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 4.0 GB in the end (delta: -2.6 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-26 22:37:59,588 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:37:59,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.05 ms. Allocated memory is still 1.5 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. [2018-10-26 22:37:59,589 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.39 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:37:59,589 INFO L168 Benchmark]: Boogie Preprocessor took 23.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:37:59,589 INFO L168 Benchmark]: RCFGBuilder took 486.65 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 705.2 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -756.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-10-26 22:37:59,590 INFO L168 Benchmark]: TraceAbstraction took 259546.39 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 4.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-26 22:37:59,595 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.05 ms. Allocated memory is still 1.5 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 38.39 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 486.65 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 705.2 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -756.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 259546.39 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 4.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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