java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-Reach-32bit-Automizer_Camel+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy6_false-unreach-call_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cceb4a-m [2018-01-29 22:48:54,554 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-29 22:48:54,557 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-29 22:48:54,569 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-29 22:48:54,570 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-29 22:48:54,570 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-29 22:48:54,571 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-29 22:48:54,572 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-29 22:48:54,573 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-29 22:48:54,573 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-29 22:48:54,574 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-29 22:48:54,574 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-29 22:48:54,574 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-29 22:48:54,575 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-29 22:48:54,576 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-29 22:48:54,577 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-29 22:48:54,578 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-29 22:48:54,579 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-29 22:48:54,579 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-29 22:48:54,580 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-29 22:48:54,581 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-29 22:48:54,584 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-29 22:48:54,584 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-29 22:48:54,584 INFO L98 SettingsManager]: Beginning loading settings from /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-Reach-32bit-Automizer_Camel+AI_EQ_SS.epf [2018-01-29 22:48:54,589 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-29 22:48:54,589 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-29 22:48:54,590 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-29 22:48:54,590 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-29 22:48:54,590 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-29 22:48:54,590 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-29 22:48:54,590 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-29 22:48:54,590 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-29 22:48:54,591 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-29 22:48:54,591 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-29 22:48:54,592 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-29 22:48:54,592 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-29 22:48:54,593 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-29 22:48:54,598 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-29 22:48:54,632 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-29 22:48:54,648 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-29 22:48:54,650 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-29 22:48:54,651 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-29 22:48:54,651 INFO L276 PluginConnector]: CDTParser initialized [2018-01-29 22:48:54,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_false-unreach-call_ground.i [2018-01-29 22:48:54,716 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-29 22:48:54,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-29 22:48:54,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-29 22:48:54,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-29 22:48:54,721 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-29 22:48:54,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168b1eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54, skipping insertion in model container [2018-01-29 22:48:54,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,732 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 22:48:54,741 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 22:48:54,810 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 22:48:54,820 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 22:48:54,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54 WrapperNode [2018-01-29 22:48:54,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-29 22:48:54,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-29 22:48:54,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-29 22:48:54,823 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-29 22:48:54,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (1/1) ... [2018-01-29 22:48:54,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-29 22:48:54,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-29 22:48:54,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-29 22:48:54,844 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-29 22:48:54,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (1/1) ... No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-29 22:48:54,883 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-29 22:48:54,883 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-29 22:48:54,883 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-01-29 22:48:54,883 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-29 22:48:54,883 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-29 22:48:54,883 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-01-29 22:48:54,884 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-29 22:48:54,884 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-29 22:48:54,884 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-29 22:48:54,884 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-29 22:48:55,276 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-29 22:48:55,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:48:55 BoogieIcfgContainer [2018-01-29 22:48:55,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-29 22:48:55,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-29 22:48:55,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-29 22:48:55,279 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-29 22:48:55,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 10:48:54" (1/3) ... [2018-01-29 22:48:55,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ebaf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:48:55, skipping insertion in model container [2018-01-29 22:48:55,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:48:54" (2/3) ... [2018-01-29 22:48:55,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ebaf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:48:55, skipping insertion in model container [2018-01-29 22:48:55,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:48:55" (3/3) ... [2018-01-29 22:48:55,281 INFO L107 eAbstractionObserver]: Analyzing ICFG standard_copy6_false-unreach-call_ground.i [2018-01-29 22:48:55,286 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-29 22:48:55,291 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-01-29 22:48:55,316 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-29 22:48:55,317 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-29 22:48:55,317 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-29 22:48:55,317 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-29 22:48:55,317 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-29 22:48:55,317 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-29 22:48:55,317 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-29 22:48:55,317 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-29 22:48:55,318 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-29 22:48:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-29 22:48:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-29 22:48:55,332 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:55,332 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:55,333 INFO L371 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash -966542287, now seen corresponding path program 1 times [2018-01-29 22:48:55,336 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:55,337 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:55,366 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:55,366 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:48:55,366 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:55,387 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:48:55,408 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:48:55,409 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-29 22:48:55,410 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-29 22:48:55,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-29 22:48:55,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-29 22:48:55,419 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 2 states. [2018-01-29 22:48:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:55,449 INFO L93 Difference]: Finished difference Result 148 states and 178 transitions. [2018-01-29 22:48:55,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-29 22:48:55,451 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-01-29 22:48:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:55,459 INFO L225 Difference]: With dead ends: 148 [2018-01-29 22:48:55,459 INFO L226 Difference]: Without dead ends: 81 [2018-01-29 22:48:55,461 INFO L553 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 [2018-01-29 22:48:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-29 22:48:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-29 22:48:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-29 22:48:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2018-01-29 22:48:55,487 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 35 [2018-01-29 22:48:55,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:55,487 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2018-01-29 22:48:55,487 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-29 22:48:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2018-01-29 22:48:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-29 22:48:55,488 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:55,488 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:55,488 INFO L371 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1548885415, now seen corresponding path program 1 times [2018-01-29 22:48:55,488 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:55,488 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:55,489 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:55,489 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:48:55,489 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:55,497 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:48:55,544 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:48:55,544 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-29 22:48:55,545 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-29 22:48:55,545 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-29 22:48:55,545 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-29 22:48:55,545 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 3 states. [2018-01-29 22:48:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:55,630 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2018-01-29 22:48:55,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-29 22:48:55,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-01-29 22:48:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:55,631 INFO L225 Difference]: With dead ends: 148 [2018-01-29 22:48:55,631 INFO L226 Difference]: Without dead ends: 91 [2018-01-29 22:48:55,632 INFO L553 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 [2018-01-29 22:48:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-29 22:48:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2018-01-29 22:48:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-29 22:48:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2018-01-29 22:48:55,637 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 42 [2018-01-29 22:48:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:55,637 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2018-01-29 22:48:55,637 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-29 22:48:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2018-01-29 22:48:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-29 22:48:55,638 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:55,638 INFO L350 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:55,638 INFO L371 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2107517201, now seen corresponding path program 1 times [2018-01-29 22:48:55,638 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:55,638 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:55,639 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:55,639 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:48:55,639 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:55,710 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-29 22:48:55,742 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:48:55,742 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-29 22:48:55,742 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-29 22:48:55,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-29 22:48:55,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-29 22:48:55,743 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 3 states. [2018-01-29 22:48:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:56,026 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2018-01-29 22:48:56,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-29 22:48:56,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-01-29 22:48:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:56,027 INFO L225 Difference]: With dead ends: 162 [2018-01-29 22:48:56,027 INFO L226 Difference]: Without dead ends: 113 [2018-01-29 22:48:56,027 INFO L553 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 [2018-01-29 22:48:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-01-29 22:48:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2018-01-29 22:48:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-01-29 22:48:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2018-01-29 22:48:56,033 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 53 [2018-01-29 22:48:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:56,033 INFO L432 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2018-01-29 22:48:56,033 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-29 22:48:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2018-01-29 22:48:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-01-29 22:48:56,034 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:56,035 INFO L350 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:56,035 INFO L371 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash -157991569, now seen corresponding path program 1 times [2018-01-29 22:48:56,035 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:56,035 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:56,035 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:56,036 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:48:56,036 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:56,051 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-01-29 22:48:56,115 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:56,115 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-29 22:48:56,127 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:56,158 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-01-29 22:48:56,192 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:56,193 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-01-29 22:48:56,193 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-29 22:48:56,193 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-29 22:48:56,193 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-29 22:48:56,193 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 5 states. [2018-01-29 22:48:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:56,267 INFO L93 Difference]: Finished difference Result 183 states and 199 transitions. [2018-01-29 22:48:56,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-29 22:48:56,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2018-01-29 22:48:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:56,268 INFO L225 Difference]: With dead ends: 183 [2018-01-29 22:48:56,268 INFO L226 Difference]: Without dead ends: 114 [2018-01-29 22:48:56,268 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-29 22:48:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-29 22:48:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2018-01-29 22:48:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-29 22:48:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2018-01-29 22:48:56,273 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 89 [2018-01-29 22:48:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:56,274 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2018-01-29 22:48:56,274 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-29 22:48:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2018-01-29 22:48:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-01-29 22:48:56,274 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:56,274 INFO L350 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:56,275 INFO L371 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:56,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2038062567, now seen corresponding path program 2 times [2018-01-29 22:48:56,275 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:56,275 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:56,275 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:56,276 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:48:56,276 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:56,290 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-01-29 22:48:56,364 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:56,364 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-29 22:48:56,370 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:56,385 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:56,403 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:56,413 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:48:56,416 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-01-29 22:48:56,649 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:56,650 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-01-29 22:48:56,650 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-29 22:48:56,650 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-29 22:48:56,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-01-29 22:48:56,650 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 10 states. [2018-01-29 22:48:57,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:57,049 INFO L93 Difference]: Finished difference Result 218 states and 235 transitions. [2018-01-29 22:48:57,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-29 22:48:57,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2018-01-29 22:48:57,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:57,050 INFO L225 Difference]: With dead ends: 218 [2018-01-29 22:48:57,050 INFO L226 Difference]: Without dead ends: 149 [2018-01-29 22:48:57,051 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-01-29 22:48:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-01-29 22:48:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2018-01-29 22:48:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-01-29 22:48:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2018-01-29 22:48:57,055 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 100 [2018-01-29 22:48:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:57,055 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2018-01-29 22:48:57,056 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-29 22:48:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2018-01-29 22:48:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-01-29 22:48:57,056 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:57,057 INFO L350 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:57,057 INFO L371 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1779201351, now seen corresponding path program 3 times [2018-01-29 22:48:57,057 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:57,057 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:57,058 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:57,058 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:48:57,058 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:57,079 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-01-29 22:48:57,185 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:57,185 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:57,194 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:48:57,201 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:48:57,212 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:48:57,220 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:48:57,222 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-01-29 22:48:57,247 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:57,248 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-01-29 22:48:57,248 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-29 22:48:57,248 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-29 22:48:57,248 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-29 22:48:57,248 INFO L87 Difference]: Start difference. First operand 123 states and 131 transitions. Second operand 5 states. [2018-01-29 22:48:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:57,444 INFO L93 Difference]: Finished difference Result 194 states and 208 transitions. [2018-01-29 22:48:57,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-29 22:48:57,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2018-01-29 22:48:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:57,445 INFO L225 Difference]: With dead ends: 194 [2018-01-29 22:48:57,445 INFO L226 Difference]: Without dead ends: 144 [2018-01-29 22:48:57,446 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-29 22:48:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-01-29 22:48:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 129. [2018-01-29 22:48:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-01-29 22:48:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2018-01-29 22:48:57,449 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 117 [2018-01-29 22:48:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:57,450 INFO L432 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2018-01-29 22:48:57,450 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-29 22:48:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2018-01-29 22:48:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-01-29 22:48:57,451 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:57,451 INFO L350 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:57,451 INFO L371 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:57,451 INFO L82 PathProgramCache]: Analyzing trace with hash -94870865, now seen corresponding path program 4 times [2018-01-29 22:48:57,451 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:57,451 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:57,452 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:57,452 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:48:57,452 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:57,466 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-01-29 22:48:57,564 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:57,564 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:57,571 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:48:57,601 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:48:57,603 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-01-29 22:48:57,738 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:57,738 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2018-01-29 22:48:57,738 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-29 22:48:57,738 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-29 22:48:57,739 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-01-29 22:48:57,739 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand 12 states. [2018-01-29 22:48:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:57,983 INFO L93 Difference]: Finished difference Result 247 states and 264 transitions. [2018-01-29 22:48:57,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-29 22:48:57,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 123 [2018-01-29 22:48:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:57,985 INFO L225 Difference]: With dead ends: 247 [2018-01-29 22:48:57,985 INFO L226 Difference]: Without dead ends: 166 [2018-01-29 22:48:57,985 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2018-01-29 22:48:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-01-29 22:48:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 146. [2018-01-29 22:48:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-29 22:48:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2018-01-29 22:48:57,989 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 123 [2018-01-29 22:48:57,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:57,989 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2018-01-29 22:48:57,989 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-29 22:48:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2018-01-29 22:48:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-01-29 22:48:57,990 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:57,990 INFO L350 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:57,990 INFO L371 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash -245505679, now seen corresponding path program 5 times [2018-01-29 22:48:57,991 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:57,991 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:57,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:57,991 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:48:57,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:58,002 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-01-29 22:48:58,104 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:58,104 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-29 22:48:58,109 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:58,115 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:58,120 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:58,122 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:58,126 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:58,131 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:58,131 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:48:58,133 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-01-29 22:48:58,177 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:58,177 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-29 22:48:58,177 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-29 22:48:58,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-29 22:48:58,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-29 22:48:58,178 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand 6 states. [2018-01-29 22:48:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:58,260 INFO L93 Difference]: Finished difference Result 199 states and 212 transitions. [2018-01-29 22:48:58,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-29 22:48:58,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2018-01-29 22:48:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:58,261 INFO L225 Difference]: With dead ends: 199 [2018-01-29 22:48:58,261 INFO L226 Difference]: Without dead ends: 167 [2018-01-29 22:48:58,262 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-01-29 22:48:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-01-29 22:48:58,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2018-01-29 22:48:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-29 22:48:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 166 transitions. [2018-01-29 22:48:58,266 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 166 transitions. Word has length 140 [2018-01-29 22:48:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:58,266 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 166 transitions. [2018-01-29 22:48:58,266 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-29 22:48:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 166 transitions. [2018-01-29 22:48:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-01-29 22:48:58,268 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:58,268 INFO L350 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:58,268 INFO L371 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:58,268 INFO L82 PathProgramCache]: Analyzing trace with hash 657329473, now seen corresponding path program 6 times [2018-01-29 22:48:58,268 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:58,268 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:58,269 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:58,269 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:48:58,269 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:58,278 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-01-29 22:48:58,391 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:58,392 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:58,397 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:48:58,409 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:48:58,417 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:48:58,433 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:48:58,439 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:48:58,441 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-01-29 22:48:58,477 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:58,477 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-01-29 22:48:58,477 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-29 22:48:58,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-29 22:48:58,477 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-29 22:48:58,477 INFO L87 Difference]: Start difference. First operand 158 states and 166 transitions. Second operand 5 states. [2018-01-29 22:48:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:58,769 INFO L93 Difference]: Finished difference Result 196 states and 207 transitions. [2018-01-29 22:48:58,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-29 22:48:58,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2018-01-29 22:48:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:58,773 INFO L225 Difference]: With dead ends: 196 [2018-01-29 22:48:58,773 INFO L226 Difference]: Without dead ends: 167 [2018-01-29 22:48:58,773 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-29 22:48:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-01-29 22:48:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2018-01-29 22:48:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-01-29 22:48:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2018-01-29 22:48:58,776 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 152 [2018-01-29 22:48:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:58,777 INFO L432 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2018-01-29 22:48:58,777 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-29 22:48:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2018-01-29 22:48:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-01-29 22:48:58,778 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:58,778 INFO L350 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:58,778 INFO L371 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 823387609, now seen corresponding path program 7 times [2018-01-29 22:48:58,778 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:58,778 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:58,779 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:58,779 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:48:58,779 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:58,795 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-01-29 22:48:58,918 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:58,918 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:58,923 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:48:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:58,943 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-01-29 22:48:58,971 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:58,971 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-01-29 22:48:58,971 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-29 22:48:58,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-29 22:48:58,971 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-01-29 22:48:58,971 INFO L87 Difference]: Start difference. First operand 164 states and 172 transitions. Second operand 11 states. [2018-01-29 22:48:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:59,056 INFO L93 Difference]: Finished difference Result 288 states and 304 transitions. [2018-01-29 22:48:59,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-29 22:48:59,056 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 158 [2018-01-29 22:48:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:59,057 INFO L225 Difference]: With dead ends: 288 [2018-01-29 22:48:59,057 INFO L226 Difference]: Without dead ends: 183 [2018-01-29 22:48:59,057 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-01-29 22:48:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-01-29 22:48:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 175. [2018-01-29 22:48:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-01-29 22:48:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 183 transitions. [2018-01-29 22:48:59,060 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 183 transitions. Word has length 158 [2018-01-29 22:48:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:59,060 INFO L432 AbstractCegarLoop]: Abstraction has 175 states and 183 transitions. [2018-01-29 22:48:59,060 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-29 22:48:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 183 transitions. [2018-01-29 22:48:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-01-29 22:48:59,062 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:59,062 INFO L350 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:59,062 INFO L371 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash 31599471, now seen corresponding path program 8 times [2018-01-29 22:48:59,062 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:59,062 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:59,063 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:59,063 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:48:59,063 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:59,072 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-01-29 22:48:59,136 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:59,136 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:59,141 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:48:59,147 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:59,167 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:48:59,169 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:48:59,170 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-01-29 22:48:59,285 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:59,285 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 18 [2018-01-29 22:48:59,285 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-29 22:48:59,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-29 22:48:59,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-01-29 22:48:59,286 INFO L87 Difference]: Start difference. First operand 175 states and 183 transitions. Second operand 18 states. [2018-01-29 22:48:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:48:59,514 INFO L93 Difference]: Finished difference Result 308 states and 325 transitions. [2018-01-29 22:48:59,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-29 22:48:59,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 169 [2018-01-29 22:48:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:48:59,519 INFO L225 Difference]: With dead ends: 308 [2018-01-29 22:48:59,519 INFO L226 Difference]: Without dead ends: 203 [2018-01-29 22:48:59,520 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2018-01-29 22:48:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-01-29 22:48:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 192. [2018-01-29 22:48:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-01-29 22:48:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 200 transitions. [2018-01-29 22:48:59,523 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 200 transitions. Word has length 169 [2018-01-29 22:48:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:48:59,523 INFO L432 AbstractCegarLoop]: Abstraction has 192 states and 200 transitions. [2018-01-29 22:48:59,523 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-29 22:48:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 200 transitions. [2018-01-29 22:48:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-01-29 22:48:59,524 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:48:59,524 INFO L350 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:48:59,524 INFO L371 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:48:59,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1433862833, now seen corresponding path program 9 times [2018-01-29 22:48:59,525 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:48:59,525 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:48:59,525 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:59,525 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:48:59,525 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:48:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:48:59,535 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:48:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2018-01-29 22:48:59,601 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:48:59,601 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:48:59,607 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:48:59,615 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:48:59,629 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:48:59,642 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:48:59,649 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:48:59,650 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:48:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2018-01-29 22:48:59,800 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:48:59,801 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-01-29 22:48:59,801 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-29 22:48:59,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-29 22:48:59,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-29 22:48:59,801 INFO L87 Difference]: Start difference. First operand 192 states and 200 transitions. Second operand 9 states. [2018-01-29 22:49:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:00,087 INFO L93 Difference]: Finished difference Result 305 states and 321 transitions. [2018-01-29 22:49:00,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-29 22:49:00,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 186 [2018-01-29 22:49:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:00,097 INFO L225 Difference]: With dead ends: 305 [2018-01-29 22:49:00,097 INFO L226 Difference]: Without dead ends: 210 [2018-01-29 22:49:00,098 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-01-29 22:49:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-01-29 22:49:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2018-01-29 22:49:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-01-29 22:49:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 212 transitions. [2018-01-29 22:49:00,100 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 212 transitions. Word has length 186 [2018-01-29 22:49:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:00,101 INFO L432 AbstractCegarLoop]: Abstraction has 204 states and 212 transitions. [2018-01-29 22:49:00,101 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-29 22:49:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 212 transitions. [2018-01-29 22:49:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-01-29 22:49:00,101 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:00,101 INFO L350 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:00,101 INFO L371 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:00,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1755273521, now seen corresponding path program 10 times [2018-01-29 22:49:00,102 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:00,102 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:00,102 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:00,102 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:00,102 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:00,111 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2018-01-29 22:49:00,257 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:00,257 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:00,262 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:49:00,285 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:00,287 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-01-29 22:49:00,441 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:00,441 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 20 [2018-01-29 22:49:00,442 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-29 22:49:00,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-29 22:49:00,442 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-01-29 22:49:00,442 INFO L87 Difference]: Start difference. First operand 204 states and 212 transitions. Second operand 20 states. [2018-01-29 22:49:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:00,867 INFO L93 Difference]: Finished difference Result 355 states and 372 transitions. [2018-01-29 22:49:00,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-29 22:49:00,867 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 198 [2018-01-29 22:49:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:00,868 INFO L225 Difference]: With dead ends: 355 [2018-01-29 22:49:00,868 INFO L226 Difference]: Without dead ends: 232 [2018-01-29 22:49:00,869 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2018-01-29 22:49:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-01-29 22:49:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 221. [2018-01-29 22:49:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-01-29 22:49:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 229 transitions. [2018-01-29 22:49:00,872 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 229 transitions. Word has length 198 [2018-01-29 22:49:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:00,872 INFO L432 AbstractCegarLoop]: Abstraction has 221 states and 229 transitions. [2018-01-29 22:49:00,872 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-29 22:49:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 229 transitions. [2018-01-29 22:49:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-01-29 22:49:00,873 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:00,873 INFO L350 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:00,873 INFO L371 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1872303569, now seen corresponding path program 11 times [2018-01-29 22:49:00,873 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:00,874 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:00,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:00,874 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:00,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:00,885 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-01-29 22:49:01,176 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:01,176 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:01,181 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:49:01,187 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:01,189 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:01,190 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:01,191 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:01,194 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:01,197 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:01,202 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:01,209 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:01,210 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:01,212 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-01-29 22:49:01,258 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:01,258 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-01-29 22:49:01,258 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-29 22:49:01,258 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-29 22:49:01,258 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-01-29 22:49:01,258 INFO L87 Difference]: Start difference. First operand 221 states and 229 transitions. Second operand 12 states. [2018-01-29 22:49:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:01,416 INFO L93 Difference]: Finished difference Result 325 states and 340 transitions. [2018-01-29 22:49:01,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-29 22:49:01,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 215 [2018-01-29 22:49:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:01,431 INFO L225 Difference]: With dead ends: 325 [2018-01-29 22:49:01,431 INFO L226 Difference]: Without dead ends: 239 [2018-01-29 22:49:01,431 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2018-01-29 22:49:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-01-29 22:49:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2018-01-29 22:49:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-01-29 22:49:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 241 transitions. [2018-01-29 22:49:01,434 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 241 transitions. Word has length 215 [2018-01-29 22:49:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:01,434 INFO L432 AbstractCegarLoop]: Abstraction has 233 states and 241 transitions. [2018-01-29 22:49:01,434 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-29 22:49:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 241 transitions. [2018-01-29 22:49:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-01-29 22:49:01,435 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:01,435 INFO L350 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:01,435 INFO L371 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:01,435 INFO L82 PathProgramCache]: Analyzing trace with hash 447400191, now seen corresponding path program 12 times [2018-01-29 22:49:01,435 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:01,435 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:01,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:01,436 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:01,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:01,445 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2018-01-29 22:49:01,525 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:01,525 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:01,529 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:49:01,538 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:01,539 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:01,543 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:01,546 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:01,549 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:01,550 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:01,551 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2018-01-29 22:49:01,584 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:01,584 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-01-29 22:49:01,584 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-29 22:49:01,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-29 22:49:01,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-29 22:49:01,585 INFO L87 Difference]: Start difference. First operand 233 states and 241 transitions. Second operand 7 states. [2018-01-29 22:49:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:02,226 INFO L93 Difference]: Finished difference Result 256 states and 266 transitions. [2018-01-29 22:49:02,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-29 22:49:02,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 227 [2018-01-29 22:49:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:02,228 INFO L225 Difference]: With dead ends: 256 [2018-01-29 22:49:02,228 INFO L226 Difference]: Without dead ends: 242 [2018-01-29 22:49:02,228 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-01-29 22:49:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-01-29 22:49:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2018-01-29 22:49:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-01-29 22:49:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 247 transitions. [2018-01-29 22:49:02,231 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 247 transitions. Word has length 227 [2018-01-29 22:49:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:02,231 INFO L432 AbstractCegarLoop]: Abstraction has 239 states and 247 transitions. [2018-01-29 22:49:02,231 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-29 22:49:02,232 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 247 transitions. [2018-01-29 22:49:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-01-29 22:49:02,232 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:02,232 INFO L350 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:02,232 INFO L371 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 287146087, now seen corresponding path program 13 times [2018-01-29 22:49:02,233 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:02,233 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:02,233 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:02,233 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:02,233 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:02,242 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2018-01-29 22:49:02,409 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:02,409 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:02,413 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:02,442 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-01-29 22:49:02,645 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:02,645 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17] total 22 [2018-01-29 22:49:02,646 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-29 22:49:02,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-29 22:49:02,646 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-01-29 22:49:02,646 INFO L87 Difference]: Start difference. First operand 239 states and 247 transitions. Second operand 22 states. [2018-01-29 22:49:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:02,889 INFO L93 Difference]: Finished difference Result 414 states and 431 transitions. [2018-01-29 22:49:02,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-29 22:49:02,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 233 [2018-01-29 22:49:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:02,890 INFO L225 Difference]: With dead ends: 414 [2018-01-29 22:49:02,890 INFO L226 Difference]: Without dead ends: 267 [2018-01-29 22:49:02,891 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2018-01-29 22:49:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-01-29 22:49:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-01-29 22:49:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-01-29 22:49:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2018-01-29 22:49:02,894 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 233 [2018-01-29 22:49:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:02,894 INFO L432 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2018-01-29 22:49:02,894 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-29 22:49:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2018-01-29 22:49:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-01-29 22:49:02,895 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:02,895 INFO L350 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:02,895 INFO L371 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1994680407, now seen corresponding path program 14 times [2018-01-29 22:49:02,895 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:02,895 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:02,896 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:02,896 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:02,896 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:02,911 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-01-29 22:49:03,010 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:03,010 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:03,015 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:49:03,024 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:03,036 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:03,038 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:03,040 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2018-01-29 22:49:03,252 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:03,253 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19] total 26 [2018-01-29 22:49:03,253 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-29 22:49:03,253 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-29 22:49:03,253 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2018-01-29 22:49:03,253 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand 26 states. [2018-01-29 22:49:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:03,762 INFO L93 Difference]: Finished difference Result 437 states and 454 transitions. [2018-01-29 22:49:03,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-29 22:49:03,763 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 250 [2018-01-29 22:49:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:03,764 INFO L225 Difference]: With dead ends: 437 [2018-01-29 22:49:03,764 INFO L226 Difference]: Without dead ends: 284 [2018-01-29 22:49:03,765 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=1776, Unknown=0, NotChecked=0, Total=2256 [2018-01-29 22:49:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-01-29 22:49:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 273. [2018-01-29 22:49:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-01-29 22:49:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 281 transitions. [2018-01-29 22:49:03,768 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 281 transitions. Word has length 250 [2018-01-29 22:49:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:03,768 INFO L432 AbstractCegarLoop]: Abstraction has 273 states and 281 transitions. [2018-01-29 22:49:03,768 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-29 22:49:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 281 transitions. [2018-01-29 22:49:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-01-29 22:49:03,769 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:03,769 INFO L350 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:03,769 INFO L371 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash -96936873, now seen corresponding path program 15 times [2018-01-29 22:49:03,769 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:03,769 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:03,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:03,770 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:03,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:03,779 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2018-01-29 22:49:03,895 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:03,895 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:03,900 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:49:03,908 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:03,922 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:03,933 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:03,938 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:03,939 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:03,941 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2018-01-29 22:49:03,989 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:03,989 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-01-29 22:49:03,990 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-29 22:49:03,990 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-29 22:49:03,990 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-01-29 22:49:03,990 INFO L87 Difference]: Start difference. First operand 273 states and 281 transitions. Second operand 12 states. [2018-01-29 22:49:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:04,188 INFO L93 Difference]: Finished difference Result 326 states and 338 transitions. [2018-01-29 22:49:04,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-29 22:49:04,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 267 [2018-01-29 22:49:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:04,196 INFO L225 Difference]: With dead ends: 326 [2018-01-29 22:49:04,196 INFO L226 Difference]: Without dead ends: 291 [2018-01-29 22:49:04,196 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2018-01-29 22:49:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-01-29 22:49:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 285. [2018-01-29 22:49:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-01-29 22:49:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 293 transitions. [2018-01-29 22:49:04,199 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 293 transitions. Word has length 267 [2018-01-29 22:49:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:04,207 INFO L432 AbstractCegarLoop]: Abstraction has 285 states and 293 transitions. [2018-01-29 22:49:04,207 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-29 22:49:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 293 transitions. [2018-01-29 22:49:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-01-29 22:49:04,208 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:04,208 INFO L350 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:04,208 INFO L371 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:04,208 INFO L82 PathProgramCache]: Analyzing trace with hash 440347607, now seen corresponding path program 16 times [2018-01-29 22:49:04,208 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:04,208 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:04,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:04,209 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:04,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:04,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2018-01-29 22:49:04,635 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:04,635 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:04,640 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:49:04,670 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:04,672 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 414 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2018-01-29 22:49:04,925 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:04,925 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21] total 30 [2018-01-29 22:49:04,925 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-29 22:49:04,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-29 22:49:04,925 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2018-01-29 22:49:04,926 INFO L87 Difference]: Start difference. First operand 285 states and 293 transitions. Second operand 30 states. [2018-01-29 22:49:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:05,362 INFO L93 Difference]: Finished difference Result 484 states and 501 transitions. [2018-01-29 22:49:05,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-29 22:49:05,363 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 279 [2018-01-29 22:49:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:05,364 INFO L225 Difference]: With dead ends: 484 [2018-01-29 22:49:05,364 INFO L226 Difference]: Without dead ends: 313 [2018-01-29 22:49:05,365 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=620, Invalid=2460, Unknown=0, NotChecked=0, Total=3080 [2018-01-29 22:49:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-01-29 22:49:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 302. [2018-01-29 22:49:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-01-29 22:49:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 310 transitions. [2018-01-29 22:49:05,368 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 310 transitions. Word has length 279 [2018-01-29 22:49:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:05,369 INFO L432 AbstractCegarLoop]: Abstraction has 302 states and 310 transitions. [2018-01-29 22:49:05,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-29 22:49:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 310 transitions. [2018-01-29 22:49:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-01-29 22:49:05,370 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:05,370 INFO L350 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:05,370 INFO L371 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1623674471, now seen corresponding path program 17 times [2018-01-29 22:49:05,370 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:05,370 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:05,370 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:05,371 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:05,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:05,381 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2018-01-29 22:49:06,000 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:06,000 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:06,005 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:49:06,012 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,020 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,029 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,039 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,048 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,058 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,069 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,080 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,091 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,102 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,113 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:06,121 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:06,123 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2018-01-29 22:49:06,367 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:06,368 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2018-01-29 22:49:06,368 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-29 22:49:06,368 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-29 22:49:06,368 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-01-29 22:49:06,368 INFO L87 Difference]: Start difference. First operand 302 states and 310 transitions. Second operand 14 states. [2018-01-29 22:49:06,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:06,663 INFO L93 Difference]: Finished difference Result 475 states and 491 transitions. [2018-01-29 22:49:06,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-29 22:49:06,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 296 [2018-01-29 22:49:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:06,664 INFO L225 Difference]: With dead ends: 475 [2018-01-29 22:49:06,664 INFO L226 Difference]: Without dead ends: 320 [2018-01-29 22:49:06,665 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2018-01-29 22:49:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-01-29 22:49:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 314. [2018-01-29 22:49:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-01-29 22:49:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 322 transitions. [2018-01-29 22:49:06,668 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 322 transitions. Word has length 296 [2018-01-29 22:49:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:06,668 INFO L432 AbstractCegarLoop]: Abstraction has 314 states and 322 transitions. [2018-01-29 22:49:06,668 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-29 22:49:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 322 transitions. [2018-01-29 22:49:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-01-29 22:49:06,669 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:06,670 INFO L350 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:06,670 INFO L371 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1715640521, now seen corresponding path program 18 times [2018-01-29 22:49:06,670 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:06,670 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:06,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:06,671 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:06,671 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:06,682 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2018-01-29 22:49:06,847 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:06,847 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:06,852 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:49:06,860 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,868 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,880 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,894 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,909 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,912 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,916 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,919 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,923 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:06,924 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:06,926 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2018-01-29 22:49:06,991 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:06,991 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-01-29 22:49:06,992 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-29 22:49:06,992 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-29 22:49:06,992 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-01-29 22:49:06,992 INFO L87 Difference]: Start difference. First operand 314 states and 322 transitions. Second operand 15 states. [2018-01-29 22:49:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:07,183 INFO L93 Difference]: Finished difference Result 493 states and 509 transitions. [2018-01-29 22:49:07,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-29 22:49:07,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 308 [2018-01-29 22:49:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:07,184 INFO L225 Difference]: With dead ends: 493 [2018-01-29 22:49:07,184 INFO L226 Difference]: Without dead ends: 332 [2018-01-29 22:49:07,185 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2018-01-29 22:49:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-01-29 22:49:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 326. [2018-01-29 22:49:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-01-29 22:49:07,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 334 transitions. [2018-01-29 22:49:07,189 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 334 transitions. Word has length 308 [2018-01-29 22:49:07,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:07,189 INFO L432 AbstractCegarLoop]: Abstraction has 326 states and 334 transitions. [2018-01-29 22:49:07,189 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-29 22:49:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 334 transitions. [2018-01-29 22:49:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-01-29 22:49:07,190 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:07,190 INFO L350 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:07,190 INFO L371 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:07,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1951537847, now seen corresponding path program 19 times [2018-01-29 22:49:07,191 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:07,191 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:07,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:07,191 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:07,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:07,228 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-01-29 22:49:07,428 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:07,428 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:07,433 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:07,463 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 515 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-01-29 22:49:08,639 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:08,639 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2018-01-29 22:49:08,639 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-29 22:49:08,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-29 22:49:08,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2018-01-29 22:49:08,640 INFO L87 Difference]: Start difference. First operand 326 states and 334 transitions. Second operand 34 states. [2018-01-29 22:49:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:09,169 INFO L93 Difference]: Finished difference Result 555 states and 572 transitions. [2018-01-29 22:49:09,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-29 22:49:09,170 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 320 [2018-01-29 22:49:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:09,171 INFO L225 Difference]: With dead ends: 555 [2018-01-29 22:49:09,171 INFO L226 Difference]: Without dead ends: 354 [2018-01-29 22:49:09,172 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=780, Invalid=3252, Unknown=0, NotChecked=0, Total=4032 [2018-01-29 22:49:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2018-01-29 22:49:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 343. [2018-01-29 22:49:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-01-29 22:49:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 351 transitions. [2018-01-29 22:49:09,176 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 351 transitions. Word has length 320 [2018-01-29 22:49:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:09,176 INFO L432 AbstractCegarLoop]: Abstraction has 343 states and 351 transitions. [2018-01-29 22:49:09,176 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-29 22:49:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 351 transitions. [2018-01-29 22:49:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-01-29 22:49:09,177 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:09,177 INFO L350 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:09,177 INFO L371 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash 93732727, now seen corresponding path program 20 times [2018-01-29 22:49:09,177 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:09,177 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:09,178 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:09,178 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:09,178 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:09,188 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2018-01-29 22:49:09,652 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:09,652 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:09,659 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:49:09,667 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:09,682 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:09,685 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:09,688 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 627 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-01-29 22:49:09,927 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:09,927 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 25] total 36 [2018-01-29 22:49:09,927 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-29 22:49:09,927 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-29 22:49:09,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2018-01-29 22:49:09,928 INFO L87 Difference]: Start difference. First operand 343 states and 351 transitions. Second operand 36 states. [2018-01-29 22:49:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:13,285 INFO L93 Difference]: Finished difference Result 578 states and 595 transitions. [2018-01-29 22:49:13,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-29 22:49:13,296 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 337 [2018-01-29 22:49:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:13,298 INFO L225 Difference]: With dead ends: 578 [2018-01-29 22:49:13,298 INFO L226 Difference]: Without dead ends: 371 [2018-01-29 22:49:13,299 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=895, Invalid=3661, Unknown=0, NotChecked=0, Total=4556 [2018-01-29 22:49:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-01-29 22:49:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 360. [2018-01-29 22:49:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-01-29 22:49:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 368 transitions. [2018-01-29 22:49:13,302 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 368 transitions. Word has length 337 [2018-01-29 22:49:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:13,302 INFO L432 AbstractCegarLoop]: Abstraction has 360 states and 368 transitions. [2018-01-29 22:49:13,302 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-29 22:49:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 368 transitions. [2018-01-29 22:49:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-01-29 22:49:13,303 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:13,310 INFO L350 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:13,310 INFO L371 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash 939557897, now seen corresponding path program 21 times [2018-01-29 22:49:13,310 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:13,310 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:13,310 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:13,311 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:13,311 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:13,331 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2018-01-29 22:49:13,556 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:13,556 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:13,561 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:49:13,575 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:13,578 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:13,585 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:13,590 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:13,595 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:13,596 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:13,598 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1138 trivial. 0 not checked. [2018-01-29 22:49:13,682 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:13,683 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 19 [2018-01-29 22:49:13,683 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-29 22:49:13,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-29 22:49:13,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-01-29 22:49:13,683 INFO L87 Difference]: Start difference. First operand 360 states and 368 transitions. Second operand 19 states. [2018-01-29 22:49:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:13,957 INFO L93 Difference]: Finished difference Result 464 states and 477 transitions. [2018-01-29 22:49:13,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-29 22:49:13,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 354 [2018-01-29 22:49:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:13,960 INFO L225 Difference]: With dead ends: 464 [2018-01-29 22:49:13,960 INFO L226 Difference]: Without dead ends: 378 [2018-01-29 22:49:13,960 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2018-01-29 22:49:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-01-29 22:49:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 372. [2018-01-29 22:49:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2018-01-29 22:49:13,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 380 transitions. [2018-01-29 22:49:13,970 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 380 transitions. Word has length 354 [2018-01-29 22:49:13,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:13,970 INFO L432 AbstractCegarLoop]: Abstraction has 372 states and 380 transitions. [2018-01-29 22:49:13,970 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-29 22:49:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 380 transitions. [2018-01-29 22:49:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-01-29 22:49:13,971 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:13,972 INFO L350 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:13,972 INFO L371 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:13,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1853234137, now seen corresponding path program 22 times [2018-01-29 22:49:13,972 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:13,972 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:13,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:13,972 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:13,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:13,984 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2018-01-29 22:49:14,387 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:14,387 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:14,392 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:49:14,442 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:14,445 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2018-01-29 22:49:14,772 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:14,772 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 38 [2018-01-29 22:49:14,773 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-29 22:49:14,773 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-29 22:49:14,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2018-01-29 22:49:14,773 INFO L87 Difference]: Start difference. First operand 372 states and 380 transitions. Second operand 38 states. [2018-01-29 22:49:15,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:15,425 INFO L93 Difference]: Finished difference Result 625 states and 642 transitions. [2018-01-29 22:49:15,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-29 22:49:15,426 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 366 [2018-01-29 22:49:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:15,427 INFO L225 Difference]: With dead ends: 625 [2018-01-29 22:49:15,427 INFO L226 Difference]: Without dead ends: 400 [2018-01-29 22:49:15,428 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1020, Invalid=4092, Unknown=0, NotChecked=0, Total=5112 [2018-01-29 22:49:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2018-01-29 22:49:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 389. [2018-01-29 22:49:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-01-29 22:49:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 397 transitions. [2018-01-29 22:49:15,432 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 397 transitions. Word has length 366 [2018-01-29 22:49:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:15,432 INFO L432 AbstractCegarLoop]: Abstraction has 389 states and 397 transitions. [2018-01-29 22:49:15,432 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-29 22:49:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 397 transitions. [2018-01-29 22:49:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-01-29 22:49:15,433 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:15,433 INFO L350 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:15,433 INFO L371 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1530316409, now seen corresponding path program 23 times [2018-01-29 22:49:15,433 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:15,433 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:15,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:15,434 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:15,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:15,445 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1310 trivial. 0 not checked. [2018-01-29 22:49:15,798 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:15,798 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:15,803 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:49:15,812 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,814 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,815 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,817 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,819 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,820 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,822 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,825 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,829 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,834 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,839 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,846 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,853 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,871 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:15,872 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:15,875 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1310 trivial. 0 not checked. [2018-01-29 22:49:15,986 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:15,987 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2018-01-29 22:49:15,987 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-29 22:49:15,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-29 22:49:15,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-01-29 22:49:15,987 INFO L87 Difference]: Start difference. First operand 389 states and 397 transitions. Second operand 21 states. [2018-01-29 22:49:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:16,319 INFO L93 Difference]: Finished difference Result 598 states and 614 transitions. [2018-01-29 22:49:16,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-29 22:49:16,320 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 383 [2018-01-29 22:49:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:16,321 INFO L225 Difference]: With dead ends: 598 [2018-01-29 22:49:16,321 INFO L226 Difference]: Without dead ends: 407 [2018-01-29 22:49:16,321 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2018-01-29 22:49:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-01-29 22:49:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 401. [2018-01-29 22:49:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2018-01-29 22:49:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 409 transitions. [2018-01-29 22:49:16,324 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 409 transitions. Word has length 383 [2018-01-29 22:49:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:16,325 INFO L432 AbstractCegarLoop]: Abstraction has 401 states and 409 transitions. [2018-01-29 22:49:16,325 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-29 22:49:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 409 transitions. [2018-01-29 22:49:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-01-29 22:49:16,326 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:16,326 INFO L350 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:16,326 INFO L371 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:16,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1543403959, now seen corresponding path program 24 times [2018-01-29 22:49:16,326 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:16,326 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:16,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:16,327 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:16,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:16,338 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 1348 trivial. 0 not checked. [2018-01-29 22:49:16,686 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:16,686 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-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 [2018-01-29 22:49:16,691 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:49:16,702 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,703 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,706 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,708 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,712 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,714 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,718 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,721 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,726 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:16,726 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:16,729 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2018-01-29 22:49:16,819 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:16,819 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 21 [2018-01-29 22:49:16,820 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-29 22:49:16,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-29 22:49:16,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-01-29 22:49:16,820 INFO L87 Difference]: Start difference. First operand 401 states and 409 transitions. Second operand 21 states. [2018-01-29 22:49:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:17,117 INFO L93 Difference]: Finished difference Result 616 states and 632 transitions. [2018-01-29 22:49:17,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-29 22:49:17,118 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 395 [2018-01-29 22:49:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:17,119 INFO L225 Difference]: With dead ends: 616 [2018-01-29 22:49:17,119 INFO L226 Difference]: Without dead ends: 419 [2018-01-29 22:49:17,120 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2018-01-29 22:49:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-01-29 22:49:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 413. [2018-01-29 22:49:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2018-01-29 22:49:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 421 transitions. [2018-01-29 22:49:17,123 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 421 transitions. Word has length 395 [2018-01-29 22:49:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:17,123 INFO L432 AbstractCegarLoop]: Abstraction has 413 states and 421 transitions. [2018-01-29 22:49:17,124 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-29 22:49:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 421 transitions. [2018-01-29 22:49:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-01-29 22:49:17,125 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:17,125 INFO L350 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:17,125 INFO L371 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2141680951, now seen corresponding path program 25 times [2018-01-29 22:49:17,125 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:17,125 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:17,126 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:17,126 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:17,126 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:17,138 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 0 proven. 884 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2018-01-29 22:49:17,636 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:17,636 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-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 [2018-01-29 22:49:17,641 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:17,691 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 0 proven. 884 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2018-01-29 22:49:17,763 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:17,763 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-01-29 22:49:17,764 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-29 22:49:17,764 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-29 22:49:17,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-01-29 22:49:17,764 INFO L87 Difference]: Start difference. First operand 413 states and 421 transitions. Second operand 29 states. [2018-01-29 22:49:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:18,227 INFO L93 Difference]: Finished difference Result 687 states and 703 transitions. [2018-01-29 22:49:18,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-29 22:49:18,227 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 407 [2018-01-29 22:49:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:18,228 INFO L225 Difference]: With dead ends: 687 [2018-01-29 22:49:18,228 INFO L226 Difference]: Without dead ends: 432 [2018-01-29 22:49:18,229 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-01-29 22:49:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2018-01-29 22:49:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 424. [2018-01-29 22:49:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-01-29 22:49:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 432 transitions. [2018-01-29 22:49:18,233 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 432 transitions. Word has length 407 [2018-01-29 22:49:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:18,233 INFO L432 AbstractCegarLoop]: Abstraction has 424 states and 432 transitions. [2018-01-29 22:49:18,233 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-29 22:49:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 432 transitions. [2018-01-29 22:49:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-01-29 22:49:18,235 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:18,235 INFO L350 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:18,235 INFO L371 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash -397054879, now seen corresponding path program 26 times [2018-01-29 22:49:18,235 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:18,235 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:18,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:18,236 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:18,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:18,248 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2018-01-29 22:49:18,690 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:18,690 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-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 [2018-01-29 22:49:18,696 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:49:18,707 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:18,727 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:18,731 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:18,734 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1029 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2018-01-29 22:49:19,189 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:19,189 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 48 [2018-01-29 22:49:19,190 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-29 22:49:19,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-29 22:49:19,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2018-01-29 22:49:19,190 INFO L87 Difference]: Start difference. First operand 424 states and 432 transitions. Second operand 48 states. [2018-01-29 22:49:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:20,064 INFO L93 Difference]: Finished difference Result 707 states and 724 transitions. [2018-01-29 22:49:20,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-01-29 22:49:20,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 418 [2018-01-29 22:49:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:20,066 INFO L225 Difference]: With dead ends: 707 [2018-01-29 22:49:20,066 INFO L226 Difference]: Without dead ends: 452 [2018-01-29 22:49:20,068 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1525, Invalid=6847, Unknown=0, NotChecked=0, Total=8372 [2018-01-29 22:49:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2018-01-29 22:49:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 441. [2018-01-29 22:49:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2018-01-29 22:49:20,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 449 transitions. [2018-01-29 22:49:20,071 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 449 transitions. Word has length 418 [2018-01-29 22:49:20,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:20,071 INFO L432 AbstractCegarLoop]: Abstraction has 441 states and 449 transitions. [2018-01-29 22:49:20,071 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-29 22:49:20,071 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 449 transitions. [2018-01-29 22:49:20,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-01-29 22:49:20,073 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:20,073 INFO L350 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:20,073 INFO L371 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash 582119183, now seen corresponding path program 27 times [2018-01-29 22:49:20,073 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:20,073 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:20,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:20,074 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:20,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:20,085 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1909 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 1769 trivial. 0 not checked. [2018-01-29 22:49:20,495 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:20,495 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:20,500 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:49:20,513 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:20,517 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:20,521 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:20,526 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:20,531 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:20,537 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:20,537 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:20,540 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1909 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2018-01-29 22:49:20,653 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:20,654 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 22 [2018-01-29 22:49:20,654 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-29 22:49:20,654 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-29 22:49:20,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2018-01-29 22:49:20,654 INFO L87 Difference]: Start difference. First operand 441 states and 449 transitions. Second operand 22 states. [2018-01-29 22:49:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:20,987 INFO L93 Difference]: Finished difference Result 551 states and 564 transitions. [2018-01-29 22:49:20,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-29 22:49:20,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 435 [2018-01-29 22:49:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:20,988 INFO L225 Difference]: With dead ends: 551 [2018-01-29 22:49:20,988 INFO L226 Difference]: Without dead ends: 459 [2018-01-29 22:49:20,989 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=488, Invalid=1582, Unknown=0, NotChecked=0, Total=2070 [2018-01-29 22:49:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-01-29 22:49:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 453. [2018-01-29 22:49:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-01-29 22:49:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 461 transitions. [2018-01-29 22:49:20,992 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 461 transitions. Word has length 435 [2018-01-29 22:49:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:20,993 INFO L432 AbstractCegarLoop]: Abstraction has 453 states and 461 transitions. [2018-01-29 22:49:20,993 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-29 22:49:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 461 transitions. [2018-01-29 22:49:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-01-29 22:49:20,994 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:20,994 INFO L350 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:20,994 INFO L371 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:20,994 INFO L82 PathProgramCache]: Analyzing trace with hash -987157025, now seen corresponding path program 28 times [2018-01-29 22:49:20,994 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:20,995 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:20,995 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:20,995 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:20,995 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:21,006 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 1801 trivial. 0 not checked. [2018-01-29 22:49:21,354 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:21,355 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:21,359 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:49:21,417 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:21,420 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-01-29 22:49:21,825 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:21,825 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2018-01-29 22:49:21,825 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-29 22:49:21,825 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-29 22:49:21,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2064, Unknown=0, NotChecked=0, Total=2450 [2018-01-29 22:49:21,826 INFO L87 Difference]: Start difference. First operand 453 states and 461 transitions. Second operand 50 states. [2018-01-29 22:49:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:22,744 INFO L93 Difference]: Finished difference Result 754 states and 771 transitions. [2018-01-29 22:49:22,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-01-29 22:49:22,756 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 447 [2018-01-29 22:49:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:22,757 INFO L225 Difference]: With dead ends: 754 [2018-01-29 22:49:22,757 INFO L226 Difference]: Without dead ends: 481 [2018-01-29 22:49:22,758 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1680, Invalid=7440, Unknown=0, NotChecked=0, Total=9120 [2018-01-29 22:49:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2018-01-29 22:49:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 470. [2018-01-29 22:49:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2018-01-29 22:49:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 478 transitions. [2018-01-29 22:49:22,762 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 478 transitions. Word has length 447 [2018-01-29 22:49:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:22,762 INFO L432 AbstractCegarLoop]: Abstraction has 470 states and 478 transitions. [2018-01-29 22:49:22,763 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-29 22:49:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 478 transitions. [2018-01-29 22:49:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-01-29 22:49:22,764 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:22,764 INFO L350 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:22,764 INFO L371 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash 9747185, now seen corresponding path program 29 times [2018-01-29 22:49:22,765 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:22,765 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:22,765 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:22,765 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:22,765 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:22,777 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2202 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 2062 trivial. 0 not checked. [2018-01-29 22:49:23,128 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:23,128 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:23,133 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:49:23,143 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,152 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,153 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,155 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,156 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,157 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,159 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,161 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,164 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,168 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,172 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,178 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,184 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,191 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,200 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,211 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,235 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:23,236 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:23,239 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2202 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2132 trivial. 0 not checked. [2018-01-29 22:49:23,465 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:23,465 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 22 [2018-01-29 22:49:23,465 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-29 22:49:23,466 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-29 22:49:23,466 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2018-01-29 22:49:23,466 INFO L87 Difference]: Start difference. First operand 470 states and 478 transitions. Second operand 22 states. [2018-01-29 22:49:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:23,781 INFO L93 Difference]: Finished difference Result 676 states and 691 transitions. [2018-01-29 22:49:23,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-29 22:49:23,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 464 [2018-01-29 22:49:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:23,782 INFO L225 Difference]: With dead ends: 676 [2018-01-29 22:49:23,782 INFO L226 Difference]: Without dead ends: 488 [2018-01-29 22:49:23,783 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=488, Invalid=1582, Unknown=0, NotChecked=0, Total=2070 [2018-01-29 22:49:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-01-29 22:49:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 482. [2018-01-29 22:49:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-01-29 22:49:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 490 transitions. [2018-01-29 22:49:23,786 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 490 transitions. Word has length 464 [2018-01-29 22:49:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:23,786 INFO L432 AbstractCegarLoop]: Abstraction has 482 states and 490 transitions. [2018-01-29 22:49:23,786 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-29 22:49:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 490 transitions. [2018-01-29 22:49:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2018-01-29 22:49:23,787 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:23,788 INFO L350 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:23,788 INFO L371 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1598211727, now seen corresponding path program 30 times [2018-01-29 22:49:23,788 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:23,788 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:23,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:23,788 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:23,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:23,799 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2018-01-29 22:49:24,339 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:24,340 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:24,345 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:49:24,356 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,370 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,375 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,377 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,380 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,382 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,386 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,389 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,393 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,404 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:24,405 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:24,407 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2018-01-29 22:49:24,488 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:24,488 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-01-29 22:49:24,489 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-29 22:49:24,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-29 22:49:24,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-01-29 22:49:24,489 INFO L87 Difference]: Start difference. First operand 482 states and 490 transitions. Second operand 13 states. [2018-01-29 22:49:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:24,597 INFO L93 Difference]: Finished difference Result 562 states and 573 transitions. [2018-01-29 22:49:24,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-29 22:49:24,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 476 [2018-01-29 22:49:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:24,598 INFO L225 Difference]: With dead ends: 562 [2018-01-29 22:49:24,598 INFO L226 Difference]: Without dead ends: 491 [2018-01-29 22:49:24,598 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2018-01-29 22:49:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2018-01-29 22:49:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 488. [2018-01-29 22:49:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-01-29 22:49:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 496 transitions. [2018-01-29 22:49:24,602 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 496 transitions. Word has length 476 [2018-01-29 22:49:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:24,602 INFO L432 AbstractCegarLoop]: Abstraction has 488 states and 496 transitions. [2018-01-29 22:49:24,602 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-29 22:49:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 496 transitions. [2018-01-29 22:49:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-01-29 22:49:24,604 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:24,604 INFO L350 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:24,604 INFO L371 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash -175582711, now seen corresponding path program 31 times [2018-01-29 22:49:24,604 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:24,604 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:24,605 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:24,605 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:24,605 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:24,617 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2126 trivial. 0 not checked. [2018-01-29 22:49:25,028 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:25,028 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:25,034 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:25,073 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2018-01-29 22:49:25,503 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:25,503 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 35] total 52 [2018-01-29 22:49:25,503 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-29 22:49:25,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-29 22:49:25,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2018-01-29 22:49:25,504 INFO L87 Difference]: Start difference. First operand 488 states and 496 transitions. Second operand 52 states. [2018-01-29 22:49:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:26,299 INFO L93 Difference]: Finished difference Result 813 states and 830 transitions. [2018-01-29 22:49:26,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-01-29 22:49:26,300 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 482 [2018-01-29 22:49:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:26,301 INFO L225 Difference]: With dead ends: 813 [2018-01-29 22:49:26,301 INFO L226 Difference]: Without dead ends: 516 [2018-01-29 22:49:26,302 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1845, Invalid=8055, Unknown=0, NotChecked=0, Total=9900 [2018-01-29 22:49:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2018-01-29 22:49:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 505. [2018-01-29 22:49:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2018-01-29 22:49:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 513 transitions. [2018-01-29 22:49:26,305 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 513 transitions. Word has length 482 [2018-01-29 22:49:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:26,305 INFO L432 AbstractCegarLoop]: Abstraction has 505 states and 513 transitions. [2018-01-29 22:49:26,305 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-29 22:49:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 513 transitions. [2018-01-29 22:49:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-01-29 22:49:26,307 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:26,307 INFO L350 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:26,307 INFO L371 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:26,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1295855433, now seen corresponding path program 32 times [2018-01-29 22:49:26,307 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:26,308 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:26,308 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:26,308 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:26,308 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:26,319 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2018-01-29 22:49:26,669 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:26,669 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:26,674 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:49:26,685 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:26,710 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:26,714 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:26,717 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 1530 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2018-01-29 22:49:27,479 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:27,479 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 37] total 50 [2018-01-29 22:49:27,480 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-29 22:49:27,480 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-29 22:49:27,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=2028, Unknown=0, NotChecked=0, Total=2450 [2018-01-29 22:49:27,480 INFO L87 Difference]: Start difference. First operand 505 states and 513 transitions. Second operand 50 states. [2018-01-29 22:49:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:28,293 INFO L93 Difference]: Finished difference Result 836 states and 853 transitions. [2018-01-29 22:49:28,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-01-29 22:49:28,293 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 499 [2018-01-29 22:49:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:28,294 INFO L225 Difference]: With dead ends: 836 [2018-01-29 22:49:28,294 INFO L226 Difference]: Without dead ends: 533 [2018-01-29 22:49:28,295 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1860, Invalid=7260, Unknown=0, NotChecked=0, Total=9120 [2018-01-29 22:49:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2018-01-29 22:49:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 522. [2018-01-29 22:49:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-01-29 22:49:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 530 transitions. [2018-01-29 22:49:28,299 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 530 transitions. Word has length 499 [2018-01-29 22:49:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:28,299 INFO L432 AbstractCegarLoop]: Abstraction has 522 states and 530 transitions. [2018-01-29 22:49:28,299 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-29 22:49:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 530 transitions. [2018-01-29 22:49:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2018-01-29 22:49:28,301 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:28,301 INFO L350 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:28,301 INFO L371 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1082476167, now seen corresponding path program 33 times [2018-01-29 22:49:28,301 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:28,301 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:28,301 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:28,302 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:28,302 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:28,314 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2765 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 2531 trivial. 0 not checked. [2018-01-29 22:49:28,765 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:28,765 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:28,774 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:49:28,787 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:28,790 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:28,794 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:28,799 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:28,804 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:28,809 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:28,816 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:28,817 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:28,819 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2765 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 2663 trivial. 0 not checked. [2018-01-29 22:49:28,956 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:28,956 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 27 [2018-01-29 22:49:28,957 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-29 22:49:28,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-29 22:49:28,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-01-29 22:49:28,957 INFO L87 Difference]: Start difference. First operand 522 states and 530 transitions. Second operand 27 states. [2018-01-29 22:49:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:29,321 INFO L93 Difference]: Finished difference Result 791 states and 807 transitions. [2018-01-29 22:49:29,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-29 22:49:29,321 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 516 [2018-01-29 22:49:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:29,322 INFO L225 Difference]: With dead ends: 791 [2018-01-29 22:49:29,322 INFO L226 Difference]: Without dead ends: 540 [2018-01-29 22:49:29,323 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=2451, Unknown=0, NotChecked=0, Total=3192 [2018-01-29 22:49:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2018-01-29 22:49:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 534. [2018-01-29 22:49:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2018-01-29 22:49:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 542 transitions. [2018-01-29 22:49:29,326 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 542 transitions. Word has length 516 [2018-01-29 22:49:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:29,326 INFO L432 AbstractCegarLoop]: Abstraction has 534 states and 542 transitions. [2018-01-29 22:49:29,327 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-29 22:49:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 542 transitions. [2018-01-29 22:49:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2018-01-29 22:49:29,328 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:29,328 INFO L350 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:29,328 INFO L371 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2106154489, now seen corresponding path program 34 times [2018-01-29 22:49:29,329 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:29,329 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:29,329 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:29,329 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:29,329 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:29,342 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2859 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 2757 trivial. 0 not checked. [2018-01-29 22:49:29,733 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:29,733 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:29,738 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:49:29,811 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:29,814 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2859 backedges. 0 proven. 1719 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2018-01-29 22:49:30,301 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:30,301 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 39] total 52 [2018-01-29 22:49:30,301 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-29 22:49:30,301 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-29 22:49:30,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2191, Unknown=0, NotChecked=0, Total=2652 [2018-01-29 22:49:30,302 INFO L87 Difference]: Start difference. First operand 534 states and 542 transitions. Second operand 52 states. [2018-01-29 22:49:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:31,148 INFO L93 Difference]: Finished difference Result 883 states and 900 transitions. [2018-01-29 22:49:31,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-01-29 22:49:31,148 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 528 [2018-01-29 22:49:31,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:31,149 INFO L225 Difference]: With dead ends: 883 [2018-01-29 22:49:31,149 INFO L226 Difference]: Without dead ends: 562 [2018-01-29 22:49:31,150 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2045, Invalid=7855, Unknown=0, NotChecked=0, Total=9900 [2018-01-29 22:49:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2018-01-29 22:49:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 551. [2018-01-29 22:49:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2018-01-29 22:49:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 559 transitions. [2018-01-29 22:49:31,154 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 559 transitions. Word has length 528 [2018-01-29 22:49:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:31,154 INFO L432 AbstractCegarLoop]: Abstraction has 551 states and 559 transitions. [2018-01-29 22:49:31,154 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-29 22:49:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 559 transitions. [2018-01-29 22:49:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-01-29 22:49:31,156 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:31,156 INFO L350 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:31,156 INFO L371 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:31,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1726688119, now seen corresponding path program 35 times [2018-01-29 22:49:31,156 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:31,156 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:31,157 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:31,157 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:31,157 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:31,170 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 2863 trivial. 0 not checked. [2018-01-29 22:49:31,645 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:31,645 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:31,649 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:49:31,668 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,669 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,670 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,672 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,673 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,674 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,676 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,678 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,680 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,682 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,686 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,690 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,695 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,702 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,710 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,719 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,729 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,740 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,754 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,803 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:31,805 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:31,808 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 2863 trivial. 0 not checked. [2018-01-29 22:49:31,903 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:31,903 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-01-29 22:49:31,904 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-29 22:49:31,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-29 22:49:31,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-01-29 22:49:31,904 INFO L87 Difference]: Start difference. First operand 551 states and 559 transitions. Second operand 21 states. [2018-01-29 22:49:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:32,154 INFO L93 Difference]: Finished difference Result 721 states and 734 transitions. [2018-01-29 22:49:32,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-29 22:49:32,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 545 [2018-01-29 22:49:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:32,156 INFO L225 Difference]: With dead ends: 721 [2018-01-29 22:49:32,156 INFO L226 Difference]: Without dead ends: 560 [2018-01-29 22:49:32,156 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=498, Invalid=984, Unknown=0, NotChecked=0, Total=1482 [2018-01-29 22:49:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2018-01-29 22:49:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 557. [2018-01-29 22:49:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2018-01-29 22:49:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 565 transitions. [2018-01-29 22:49:32,161 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 565 transitions. Word has length 545 [2018-01-29 22:49:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:32,161 INFO L432 AbstractCegarLoop]: Abstraction has 557 states and 565 transitions. [2018-01-29 22:49:32,161 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-29 22:49:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 565 transitions. [2018-01-29 22:49:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2018-01-29 22:49:32,163 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:32,164 INFO L350 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:32,164 INFO L371 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:32,164 INFO L82 PathProgramCache]: Analyzing trace with hash 403786127, now seen corresponding path program 36 times [2018-01-29 22:49:32,164 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:32,164 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:32,165 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:32,165 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:32,165 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:32,178 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3153 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 3013 trivial. 0 not checked. [2018-01-29 22:49:32,614 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:32,614 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:32,621 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:49:32,639 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,650 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,662 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,674 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,685 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,700 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,716 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,723 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,739 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,751 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,766 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,773 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,781 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,788 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,796 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:32,797 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:32,800 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3153 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 3013 trivial. 0 not checked. [2018-01-29 22:49:32,963 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:32,963 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2018-01-29 22:49:32,964 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-29 22:49:32,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-29 22:49:32,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2018-01-29 22:49:32,964 INFO L87 Difference]: Start difference. First operand 557 states and 565 transitions. Second operand 24 states. [2018-01-29 22:49:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:33,336 INFO L93 Difference]: Finished difference Result 691 states and 704 transitions. [2018-01-29 22:49:33,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-29 22:49:33,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 551 [2018-01-29 22:49:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:33,337 INFO L225 Difference]: With dead ends: 691 [2018-01-29 22:49:33,338 INFO L226 Difference]: Without dead ends: 575 [2018-01-29 22:49:33,338 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=591, Invalid=2061, Unknown=0, NotChecked=0, Total=2652 [2018-01-29 22:49:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-01-29 22:49:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 569. [2018-01-29 22:49:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2018-01-29 22:49:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 577 transitions. [2018-01-29 22:49:33,341 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 577 transitions. Word has length 551 [2018-01-29 22:49:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:33,342 INFO L432 AbstractCegarLoop]: Abstraction has 569 states and 577 transitions. [2018-01-29 22:49:33,342 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-29 22:49:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 577 transitions. [2018-01-29 22:49:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2018-01-29 22:49:33,347 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:33,347 INFO L350 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:33,347 INFO L371 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:33,347 INFO L82 PathProgramCache]: Analyzing trace with hash -154448113, now seen corresponding path program 37 times [2018-01-29 22:49:33,347 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:33,347 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:33,348 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:33,348 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:33,348 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:33,361 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2018-01-29 22:49:34,123 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:34,123 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:34,128 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:34,174 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1919 refuted. 0 times theorem prover too weak. 1322 trivial. 0 not checked. [2018-01-29 22:49:34,770 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:34,770 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 41] total 58 [2018-01-29 22:49:34,770 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-29 22:49:34,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-29 22:49:34,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2018-01-29 22:49:34,771 INFO L87 Difference]: Start difference. First operand 569 states and 577 transitions. Second operand 58 states. [2018-01-29 22:49:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:35,892 INFO L93 Difference]: Finished difference Result 942 states and 959 transitions. [2018-01-29 22:49:35,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-01-29 22:49:35,892 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 563 [2018-01-29 22:49:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:35,893 INFO L225 Difference]: With dead ends: 942 [2018-01-29 22:49:35,893 INFO L226 Difference]: Without dead ends: 597 [2018-01-29 22:49:35,895 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2400, Invalid=10032, Unknown=0, NotChecked=0, Total=12432 [2018-01-29 22:49:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2018-01-29 22:49:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 586. [2018-01-29 22:49:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2018-01-29 22:49:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 594 transitions. [2018-01-29 22:49:35,905 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 594 transitions. Word has length 563 [2018-01-29 22:49:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:35,906 INFO L432 AbstractCegarLoop]: Abstraction has 586 states and 594 transitions. [2018-01-29 22:49:35,906 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-29 22:49:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 594 transitions. [2018-01-29 22:49:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-01-29 22:49:35,914 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:35,915 INFO L350 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:35,915 INFO L371 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2111154465, now seen corresponding path program 38 times [2018-01-29 22:49:35,915 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:35,915 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:35,915 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:35,915 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:35,916 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:35,938 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 3268 trivial. 0 not checked. [2018-01-29 22:49:36,708 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:36,708 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:36,712 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:49:36,726 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:36,755 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:36,761 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:36,764 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 2130 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2018-01-29 22:49:37,376 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:37,376 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 43] total 62 [2018-01-29 22:49:37,377 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-29 22:49:37,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-29 22:49:37,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=3180, Unknown=0, NotChecked=0, Total=3782 [2018-01-29 22:49:37,377 INFO L87 Difference]: Start difference. First operand 586 states and 594 transitions. Second operand 62 states. [2018-01-29 22:49:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:38,503 INFO L93 Difference]: Finished difference Result 965 states and 982 transitions. [2018-01-29 22:49:38,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-01-29 22:49:38,503 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 580 [2018-01-29 22:49:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:38,505 INFO L225 Difference]: With dead ends: 965 [2018-01-29 22:49:38,505 INFO L226 Difference]: Without dead ends: 614 [2018-01-29 22:49:38,506 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2700, Invalid=11580, Unknown=0, NotChecked=0, Total=14280 [2018-01-29 22:49:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2018-01-29 22:49:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 603. [2018-01-29 22:49:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2018-01-29 22:49:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 611 transitions. [2018-01-29 22:49:38,510 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 611 transitions. Word has length 580 [2018-01-29 22:49:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:38,510 INFO L432 AbstractCegarLoop]: Abstraction has 603 states and 611 transitions. [2018-01-29 22:49:38,510 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-29 22:49:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 611 transitions. [2018-01-29 22:49:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-01-29 22:49:38,512 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:38,512 INFO L350 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:38,512 INFO L371 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash 757611935, now seen corresponding path program 39 times [2018-01-29 22:49:38,512 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:38,513 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:38,523 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:38,523 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:38,523 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:38,550 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 3546 trivial. 0 not checked. [2018-01-29 22:49:39,269 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:39,269 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:39,277 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:49:39,291 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:39,295 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:39,298 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:39,303 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:39,308 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:39,313 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:39,320 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:39,329 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:39,330 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:39,333 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 3640 trivial. 0 not checked. [2018-01-29 22:49:39,480 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:39,480 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 28 [2018-01-29 22:49:39,481 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-29 22:49:39,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-29 22:49:39,481 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2018-01-29 22:49:39,481 INFO L87 Difference]: Start difference. First operand 603 states and 611 transitions. Second operand 28 states. [2018-01-29 22:49:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:39,872 INFO L93 Difference]: Finished difference Result 869 states and 884 transitions. [2018-01-29 22:49:39,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-29 22:49:39,872 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 597 [2018-01-29 22:49:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:39,873 INFO L225 Difference]: With dead ends: 869 [2018-01-29 22:49:39,873 INFO L226 Difference]: Without dead ends: 621 [2018-01-29 22:49:39,874 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=799, Invalid=2741, Unknown=0, NotChecked=0, Total=3540 [2018-01-29 22:49:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2018-01-29 22:49:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 615. [2018-01-29 22:49:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2018-01-29 22:49:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 623 transitions. [2018-01-29 22:49:39,877 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 623 transitions. Word has length 597 [2018-01-29 22:49:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:39,878 INFO L432 AbstractCegarLoop]: Abstraction has 615 states and 623 transitions. [2018-01-29 22:49:39,878 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-29 22:49:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 623 transitions. [2018-01-29 22:49:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2018-01-29 22:49:39,880 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:39,880 INFO L350 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:39,880 INFO L371 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:39,880 INFO L82 PathProgramCache]: Analyzing trace with hash 228547183, now seen corresponding path program 40 times [2018-01-29 22:49:39,880 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:39,880 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:39,881 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:39,881 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:39,881 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:39,895 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3880 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2018-01-29 22:49:40,399 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:40,400 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:40,404 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:49:40,494 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:40,498 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3880 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 1528 trivial. 0 not checked. [2018-01-29 22:49:41,141 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:41,141 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 45] total 62 [2018-01-29 22:49:41,141 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-29 22:49:41,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-29 22:49:41,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=3156, Unknown=0, NotChecked=0, Total=3782 [2018-01-29 22:49:41,142 INFO L87 Difference]: Start difference. First operand 615 states and 623 transitions. Second operand 62 states. [2018-01-29 22:49:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:42,282 INFO L93 Difference]: Finished difference Result 1012 states and 1029 transitions. [2018-01-29 22:49:42,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-01-29 22:49:42,282 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 609 [2018-01-29 22:49:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:42,284 INFO L225 Difference]: With dead ends: 1012 [2018-01-29 22:49:42,284 INFO L226 Difference]: Without dead ends: 643 [2018-01-29 22:49:42,285 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2820, Invalid=11460, Unknown=0, NotChecked=0, Total=14280 [2018-01-29 22:49:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-01-29 22:49:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 632. [2018-01-29 22:49:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2018-01-29 22:49:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 640 transitions. [2018-01-29 22:49:42,289 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 640 transitions. Word has length 609 [2018-01-29 22:49:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:42,289 INFO L432 AbstractCegarLoop]: Abstraction has 632 states and 640 transitions. [2018-01-29 22:49:42,289 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-29 22:49:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 640 transitions. [2018-01-29 22:49:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2018-01-29 22:49:42,291 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:42,291 INFO L350 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:42,291 INFO L371 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash -521700095, now seen corresponding path program 41 times [2018-01-29 22:49:42,292 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:42,292 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:42,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:42,292 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:42,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:42,307 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4163 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 3979 trivial. 0 not checked. [2018-01-29 22:49:42,900 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:42,900 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:42,905 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:49:42,917 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,918 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,920 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,921 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,922 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,924 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,925 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,927 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,929 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,931 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,934 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,937 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,941 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,946 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,953 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,961 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,970 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,980 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:42,992 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:43,006 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:43,022 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:43,041 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:43,134 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:43,136 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:43,140 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4163 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 3873 trivial. 0 not checked. [2018-01-29 22:49:43,359 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:43,359 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 31 [2018-01-29 22:49:43,359 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-29 22:49:43,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-29 22:49:43,359 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2018-01-29 22:49:43,360 INFO L87 Difference]: Start difference. First operand 632 states and 640 transitions. Second operand 31 states. [2018-01-29 22:49:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:43,799 INFO L93 Difference]: Finished difference Result 727 states and 739 transitions. [2018-01-29 22:49:43,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-29 22:49:43,799 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 626 [2018-01-29 22:49:43,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:43,801 INFO L225 Difference]: With dead ends: 727 [2018-01-29 22:49:43,801 INFO L226 Difference]: Without dead ends: 650 [2018-01-29 22:49:43,802 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2018-01-29 22:49:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2018-01-29 22:49:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 644. [2018-01-29 22:49:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2018-01-29 22:49:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 652 transitions. [2018-01-29 22:49:43,805 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 652 transitions. Word has length 626 [2018-01-29 22:49:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:43,806 INFO L432 AbstractCegarLoop]: Abstraction has 644 states and 652 transitions. [2018-01-29 22:49:43,806 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-29 22:49:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 652 transitions. [2018-01-29 22:49:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2018-01-29 22:49:43,808 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:43,808 INFO L350 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:43,808 INFO L371 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:43,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1064681857, now seen corresponding path program 42 times [2018-01-29 22:49:43,808 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:43,808 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:43,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:43,809 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:43,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:43,837 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4275 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 4041 trivial. 0 not checked. [2018-01-29 22:49:44,456 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:44,456 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:44,460 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:49:44,474 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,476 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,479 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,481 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,484 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,486 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,490 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,493 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,497 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,501 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,506 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,511 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,517 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,524 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,531 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,539 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,549 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,559 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,570 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:44,572 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:44,575 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4275 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 4041 trivial. 0 not checked. [2018-01-29 22:49:44,689 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:44,689 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-01-29 22:49:44,689 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-29 22:49:44,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-29 22:49:44,690 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-01-29 22:49:44,690 INFO L87 Difference]: Start difference. First operand 644 states and 652 transitions. Second operand 21 states. [2018-01-29 22:49:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:44,928 INFO L93 Difference]: Finished difference Result 736 states and 747 transitions. [2018-01-29 22:49:44,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-29 22:49:44,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 638 [2018-01-29 22:49:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:44,930 INFO L225 Difference]: With dead ends: 736 [2018-01-29 22:49:44,930 INFO L226 Difference]: Without dead ends: 653 [2018-01-29 22:49:44,930 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=498, Invalid=984, Unknown=0, NotChecked=0, Total=1482 [2018-01-29 22:49:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2018-01-29 22:49:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 650. [2018-01-29 22:49:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2018-01-29 22:49:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 658 transitions. [2018-01-29 22:49:44,933 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 658 transitions. Word has length 638 [2018-01-29 22:49:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:44,934 INFO L432 AbstractCegarLoop]: Abstraction has 650 states and 658 transitions. [2018-01-29 22:49:44,934 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-29 22:49:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 658 transitions. [2018-01-29 22:49:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2018-01-29 22:49:44,936 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:44,936 INFO L350 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:44,936 INFO L371 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash -697924071, now seen corresponding path program 43 times [2018-01-29 22:49:44,936 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:44,936 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:44,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:44,937 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:44,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:44,951 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 4041 trivial. 0 not checked. [2018-01-29 22:49:45,655 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:45,656 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:45,660 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:45,715 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 2585 refuted. 0 times theorem prover too weak. 1746 trivial. 0 not checked. [2018-01-29 22:49:46,457 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:46,458 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 47] total 68 [2018-01-29 22:49:46,458 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-29 22:49:46,458 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-29 22:49:46,458 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=3839, Unknown=0, NotChecked=0, Total=4556 [2018-01-29 22:49:46,459 INFO L87 Difference]: Start difference. First operand 650 states and 658 transitions. Second operand 68 states. [2018-01-29 22:49:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:47,835 INFO L93 Difference]: Finished difference Result 1071 states and 1088 transitions. [2018-01-29 22:49:47,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-01-29 22:49:47,836 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 644 [2018-01-29 22:49:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:47,837 INFO L225 Difference]: With dead ends: 1071 [2018-01-29 22:49:47,837 INFO L226 Difference]: Without dead ends: 678 [2018-01-29 22:49:47,839 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3245, Invalid=14047, Unknown=0, NotChecked=0, Total=17292 [2018-01-29 22:49:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2018-01-29 22:49:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 667. [2018-01-29 22:49:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2018-01-29 22:49:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 675 transitions. [2018-01-29 22:49:47,844 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 675 transitions. Word has length 644 [2018-01-29 22:49:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:47,844 INFO L432 AbstractCegarLoop]: Abstraction has 667 states and 675 transitions. [2018-01-29 22:49:47,844 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-29 22:49:47,844 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 675 transitions. [2018-01-29 22:49:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-01-29 22:49:47,847 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:47,847 INFO L350 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:47,847 INFO L371 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:47,848 INFO L82 PathProgramCache]: Analyzing trace with hash -175741625, now seen corresponding path program 44 times [2018-01-29 22:49:47,848 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:47,848 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:47,848 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:47,848 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:49:47,848 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:47,869 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4637 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 4403 trivial. 0 not checked. [2018-01-29 22:49:48,502 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:48,502 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:48,516 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:49:48,529 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:48,570 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:48,576 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:48,579 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4637 backedges. 0 proven. 2829 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2018-01-29 22:49:49,330 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:49,331 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 49] total 68 [2018-01-29 22:49:49,331 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-29 22:49:49,331 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-29 22:49:49,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=3813, Unknown=0, NotChecked=0, Total=4556 [2018-01-29 22:49:49,332 INFO L87 Difference]: Start difference. First operand 667 states and 675 transitions. Second operand 68 states. [2018-01-29 22:49:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:50,717 INFO L93 Difference]: Finished difference Result 1094 states and 1111 transitions. [2018-01-29 22:49:50,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-01-29 22:49:50,717 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 661 [2018-01-29 22:49:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:50,718 INFO L225 Difference]: With dead ends: 1094 [2018-01-29 22:49:50,718 INFO L226 Difference]: Without dead ends: 695 [2018-01-29 22:49:50,719 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3375, Invalid=13917, Unknown=0, NotChecked=0, Total=17292 [2018-01-29 22:49:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2018-01-29 22:49:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 684. [2018-01-29 22:49:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2018-01-29 22:49:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 692 transitions. [2018-01-29 22:49:50,723 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 692 transitions. Word has length 661 [2018-01-29 22:49:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:50,724 INFO L432 AbstractCegarLoop]: Abstraction has 684 states and 692 transitions. [2018-01-29 22:49:50,724 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-29 22:49:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 692 transitions. [2018-01-29 22:49:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-01-29 22:49:50,726 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:50,726 INFO L350 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:50,726 INFO L371 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1300820185, now seen corresponding path program 45 times [2018-01-29 22:49:50,726 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:50,726 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:50,727 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:50,727 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:50,727 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:50,743 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4948 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 4596 trivial. 0 not checked. [2018-01-29 22:49:51,511 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:51,511 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:51,516 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:49:51,531 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,534 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,538 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,543 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,548 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,554 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,560 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,568 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,578 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,590 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,605 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:49:51,607 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:51,610 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4948 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 4658 trivial. 0 not checked. [2018-01-29 22:49:51,862 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:51,862 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 35 [2018-01-29 22:49:51,863 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-29 22:49:51,863 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-29 22:49:51,863 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2018-01-29 22:49:51,863 INFO L87 Difference]: Start difference. First operand 684 states and 692 transitions. Second operand 35 states. [2018-01-29 22:49:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:52,509 INFO L93 Difference]: Finished difference Result 854 states and 867 transitions. [2018-01-29 22:49:52,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-01-29 22:49:52,509 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 678 [2018-01-29 22:49:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:52,510 INFO L225 Difference]: With dead ends: 854 [2018-01-29 22:49:52,510 INFO L226 Difference]: Without dead ends: 702 [2018-01-29 22:49:52,511 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 669 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1263, Invalid=4589, Unknown=0, NotChecked=0, Total=5852 [2018-01-29 22:49:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2018-01-29 22:49:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 696. [2018-01-29 22:49:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2018-01-29 22:49:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 704 transitions. [2018-01-29 22:49:52,515 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 704 transitions. Word has length 678 [2018-01-29 22:49:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:52,515 INFO L432 AbstractCegarLoop]: Abstraction has 696 states and 704 transitions. [2018-01-29 22:49:52,515 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-29 22:49:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 704 transitions. [2018-01-29 22:49:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2018-01-29 22:49:52,518 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:52,518 INFO L350 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:52,518 INFO L371 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:52,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2008815447, now seen corresponding path program 46 times [2018-01-29 22:49:52,519 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:52,519 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:52,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:52,519 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:52,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:52,537 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5078 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 4658 trivial. 0 not checked. [2018-01-29 22:49:53,435 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:53,435 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:53,440 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:49:53,549 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:53,554 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5078 backedges. 0 proven. 3084 refuted. 0 times theorem prover too weak. 1994 trivial. 0 not checked. [2018-01-29 22:49:54,440 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:54,440 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 51] total 76 [2018-01-29 22:49:54,441 INFO L409 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-01-29 22:49:54,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-01-29 22:49:54,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=4831, Unknown=0, NotChecked=0, Total=5700 [2018-01-29 22:49:54,441 INFO L87 Difference]: Start difference. First operand 696 states and 704 transitions. Second operand 76 states. [2018-01-29 22:49:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:56,129 INFO L93 Difference]: Finished difference Result 1141 states and 1158 transitions. [2018-01-29 22:49:56,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-01-29 22:49:56,129 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 690 [2018-01-29 22:49:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:56,131 INFO L225 Difference]: With dead ends: 1141 [2018-01-29 22:49:56,131 INFO L226 Difference]: Without dead ends: 724 [2018-01-29 22:49:56,132 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4367 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3965, Invalid=17791, Unknown=0, NotChecked=0, Total=21756 [2018-01-29 22:49:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-01-29 22:49:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 713. [2018-01-29 22:49:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2018-01-29 22:49:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 721 transitions. [2018-01-29 22:49:56,137 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 721 transitions. Word has length 690 [2018-01-29 22:49:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:56,137 INFO L432 AbstractCegarLoop]: Abstraction has 713 states and 721 transitions. [2018-01-29 22:49:56,137 INFO L433 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-01-29 22:49:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 721 transitions. [2018-01-29 22:49:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2018-01-29 22:49:56,140 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:56,140 INFO L350 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:56,140 INFO L371 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:56,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1685786279, now seen corresponding path program 47 times [2018-01-29 22:49:56,140 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:56,140 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:56,141 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:56,141 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:56,141 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:56,158 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5418 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 5128 trivial. 0 not checked. [2018-01-29 22:49:56,955 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:56,955 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:56,959 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:49:56,974 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,975 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,976 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,977 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,978 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,980 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,982 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,983 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,985 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,988 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,990 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,993 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:56,996 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,000 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,005 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,012 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,020 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,029 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,040 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,052 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,066 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,083 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,102 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,124 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,149 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,243 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:49:57,246 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:57,251 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5418 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 5128 trivial. 0 not checked. [2018-01-29 22:49:57,465 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:57,465 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2018-01-29 22:49:57,466 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-29 22:49:57,466 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-29 22:49:57,466 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2018-01-29 22:49:57,466 INFO L87 Difference]: Start difference. First operand 713 states and 721 transitions. Second operand 33 states. [2018-01-29 22:49:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:57,933 INFO L93 Difference]: Finished difference Result 1027 states and 1042 transitions. [2018-01-29 22:49:57,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-01-29 22:49:57,933 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 707 [2018-01-29 22:49:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:57,935 INFO L225 Difference]: With dead ends: 1027 [2018-01-29 22:49:57,935 INFO L226 Difference]: Without dead ends: 731 [2018-01-29 22:49:57,935 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1128, Invalid=4128, Unknown=0, NotChecked=0, Total=5256 [2018-01-29 22:49:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2018-01-29 22:49:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 725. [2018-01-29 22:49:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2018-01-29 22:49:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 733 transitions. [2018-01-29 22:49:57,939 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 733 transitions. Word has length 707 [2018-01-29 22:49:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:57,940 INFO L432 AbstractCegarLoop]: Abstraction has 725 states and 733 transitions. [2018-01-29 22:49:57,940 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-29 22:49:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 733 transitions. [2018-01-29 22:49:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2018-01-29 22:49:57,942 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:57,943 INFO L350 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:57,943 INFO L371 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1722592295, now seen corresponding path program 48 times [2018-01-29 22:49:57,943 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:57,943 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:57,943 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:57,943 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:57,943 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:49:57,962 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:49:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5542 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 5048 trivial. 0 not checked. [2018-01-29 22:49:58,940 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:49:58,940 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:49:58,945 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:49:58,961 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,962 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,965 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,967 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,971 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,973 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,977 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,980 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,985 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,988 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:58,994 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,001 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,008 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,014 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,021 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,029 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,039 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,052 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,065 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,077 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,091 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:49:59,093 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:49:59,097 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:49:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5542 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 5252 trivial. 0 not checked. [2018-01-29 22:49:59,326 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:49:59,326 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 39 [2018-01-29 22:49:59,327 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-29 22:49:59,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-29 22:49:59,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2018-01-29 22:49:59,327 INFO L87 Difference]: Start difference. First operand 725 states and 733 transitions. Second operand 39 states. [2018-01-29 22:49:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:49:59,981 INFO L93 Difference]: Finished difference Result 1114 states and 1130 transitions. [2018-01-29 22:49:59,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-01-29 22:49:59,982 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 719 [2018-01-29 22:49:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:49:59,983 INFO L225 Difference]: With dead ends: 1114 [2018-01-29 22:49:59,983 INFO L226 Difference]: Without dead ends: 743 [2018-01-29 22:49:59,984 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 710 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1563, Invalid=5577, Unknown=0, NotChecked=0, Total=7140 [2018-01-29 22:49:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2018-01-29 22:49:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 737. [2018-01-29 22:49:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2018-01-29 22:49:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 745 transitions. [2018-01-29 22:49:59,988 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 745 transitions. Word has length 719 [2018-01-29 22:49:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:49:59,988 INFO L432 AbstractCegarLoop]: Abstraction has 737 states and 745 transitions. [2018-01-29 22:49:59,988 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-29 22:49:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 745 transitions. [2018-01-29 22:49:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2018-01-29 22:49:59,991 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:49:59,991 INFO L350 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 15, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:49:59,991 INFO L371 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0AssertViolation]=== [2018-01-29 22:49:59,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1231208359, now seen corresponding path program 49 times [2018-01-29 22:49:59,991 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:49:59,992 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:49:59,992 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:49:59,992 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:49:59,992 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:50:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:50:00,011 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:50:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5684 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 5332 trivial. 0 not checked. [2018-01-29 22:50:00,888 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:50:00,888 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:50:00,892 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:50:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:50:00,951 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:50:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5684 backedges. 0 proven. 3350 refuted. 0 times theorem prover too weak. 2334 trivial. 0 not checked. [2018-01-29 22:50:01,857 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:50:01,857 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 53] total 76 [2018-01-29 22:50:01,858 INFO L409 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-01-29 22:50:01,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-01-29 22:50:01,858 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=4805, Unknown=0, NotChecked=0, Total=5700 [2018-01-29 22:50:01,858 INFO L87 Difference]: Start difference. First operand 737 states and 745 transitions. Second operand 76 states. Received shutdown request... [2018-01-29 22:50:02,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-01-29 22:50:02,587 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-29 22:50:02,590 WARN L185 ceAbstractionStarter]: Timeout [2018-01-29 22:50:02,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.01 10:50:02 BoogieIcfgContainer [2018-01-29 22:50:02,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-29 22:50:02,591 INFO L168 Benchmark]: Toolchain (without parser) took 67874.84 ms. Allocated memory was 147.3 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 110.9 MB in the beginning and 319.1 MB in the end (delta: -208.2 MB). Peak memory consumption was 1.7 GB. Max. memory is 5.3 GB. [2018-01-29 22:50:02,592 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 147.3 MB. Free memory is still 115.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-29 22:50:02,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 105.66 ms. Allocated memory is still 147.3 MB. Free memory was 110.9 MB in the beginning and 102.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 5.3 GB. [2018-01-29 22:50:02,592 INFO L168 Benchmark]: Boogie Preprocessor took 20.96 ms. Allocated memory is still 147.3 MB. Free memory was 102.4 MB in the beginning and 100.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 5.3 GB. [2018-01-29 22:50:02,592 INFO L168 Benchmark]: RCFGBuilder took 432.09 ms. Allocated memory is still 147.3 MB. Free memory was 100.7 MB in the beginning and 82.2 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 5.3 GB. [2018-01-29 22:50:02,592 INFO L168 Benchmark]: TraceAbstraction took 67313.81 ms. Allocated memory was 147.3 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 82.2 MB in the beginning and 319.1 MB in the end (delta: -236.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 5.3 GB. [2018-01-29 22:50:02,596 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 147.3 MB. Free memory is still 115.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 105.66 ms. Allocated memory is still 147.3 MB. Free memory was 110.9 MB in the beginning and 102.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 20.96 ms. Allocated memory is still 147.3 MB. Free memory was 102.4 MB in the beginning and 100.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 5.3 GB. * RCFGBuilder took 432.09 ms. Allocated memory is still 147.3 MB. Free memory was 100.7 MB in the beginning and 82.2 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 5.3 GB. * TraceAbstraction took 67313.81 ms. Allocated memory was 147.3 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 82.2 MB in the beginning and 319.1 MB in the end (delta: -236.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (737states) and interpolant automaton (currently 60 states, 76 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 114 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 86 locations, 1 error locations. TIMEOUT Result, 67.2s OverallTime, 52 OverallIterations, 26 TraceHistogramMax, 28.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3548 SDtfs, 5777 SDslu, 43692 SDs, 0 SdLazy, 21991 SolverSat, 1649 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21938 GetRequests, 19188 SyntacticMatches, 0 SemanticMatches, 2749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44254 ImplicationChecksByTransitivity, 34.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=737occurred in iteration=51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 51 MinimizatonAttempts, 446 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 30.4s InterpolantComputationTime, 39876 NumberOfCodeBlocks, 38154 NumberOfCodeBlocksAsserted, 355 NumberOfCheckSat, 39775 ConstructedInterpolants, 0 QuantifiedInterpolants, 26027617 SizeOfPredicates, 955 NumberOfNonLiveVariables, 24634 ConjunctsInSsa, 1004 ConjunctsInUnsatCore, 101 InterpolantComputations, 3 PerfectInterpolantSequences, 160818/199798 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_copy6_false-unreach-call_ground.i_svcomp-Reach-32bit-Automizer_Camel+AI_EQ_SS.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-29_22-50-02-601.csv Written .csv to /home/daniel/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_copy6_false-unreach-call_ground.i_svcomp-Reach-32bit-Automizer_Camel+AI_EQ_SS.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-29_22-50-02-601.csv Completed graceful shutdown