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-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cceb4a [2018-01-29 22:55:18,089 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-29 22:55:18,090 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-29 22:55:18,104 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-29 22:55:18,105 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-29 22:55:18,105 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-29 22:55:18,106 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-29 22:55:18,107 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-29 22:55:18,109 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-29 22:55:18,109 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-29 22:55:18,110 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-29 22:55:18,110 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-29 22:55:18,111 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-29 22:55:18,112 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-29 22:55:18,112 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-29 22:55:18,115 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-29 22:55:18,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-29 22:55:18,119 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-29 22:55:18,120 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-29 22:55:18,121 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-29 22:55:18,123 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-29 22:55:18,128 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-29 22:55:18,129 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-29 22:55:18,129 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_SS.epf [2018-01-29 22:55:18,139 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-29 22:55:18,139 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-29 22:55:18,140 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-29 22:55:18,140 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-29 22:55:18,140 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-29 22:55:18,141 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-29 22:55:18,141 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-29 22:55:18,141 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-29 22:55:18,142 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-29 22:55:18,142 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-29 22:55:18,142 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-29 22:55:18,142 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-29 22:55:18,142 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-29 22:55:18,143 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-29 22:55:18,143 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-29 22:55:18,143 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-29 22:55:18,143 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-29 22:55:18,143 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-29 22:55:18,144 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-29 22:55:18,144 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-01-29 22:55:18,144 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-29 22:55:18,144 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-29 22:55:18,144 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-29 22:55:18,145 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-29 22:55:18,145 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-29 22:55:18,145 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-29 22:55:18,145 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-29 22:55:18,145 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-29 22:55:18,146 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-29 22:55:18,146 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-29 22:55:18,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-29 22:55:18,146 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-29 22:55:18,147 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-29 22:55:18,147 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-29 22:55:18,182 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-29 22:55:18,196 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-29 22:55:18,200 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-29 22:55:18,201 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-29 22:55:18,202 INFO L276 PluginConnector]: CDTParser initialized [2018-01-29 22:55:18,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i [2018-01-29 22:55:18,328 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-29 22:55:18,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-29 22:55:18,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-29 22:55:18,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-29 22:55:18,340 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-29 22:55:18,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6470b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18, skipping insertion in model container [2018-01-29 22:55:18,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,357 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 22:55:18,370 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 22:55:18,481 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 22:55:18,493 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 22:55:18,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18 WrapperNode [2018-01-29 22:55:18,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-29 22:55:18,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-29 22:55:18,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-29 22:55:18,498 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-29 22:55:18,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (1/1) ... [2018-01-29 22:55:18,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-29 22:55:18,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-29 22:55:18,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-29 22:55:18,523 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-29 22:55:18,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (1/1) ... No working directory specified, using /storage/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 22:55:18,574 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-29 22:55:18,574 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-29 22:55:18,574 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-01-29 22:55:18,574 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-29 22:55:18,574 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-29 22:55:18,574 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-01-29 22:55:18,574 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-29 22:55:18,574 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-29 22:55:18,575 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-29 22:55:18,694 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-29 22:55:18,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:55:18 BoogieIcfgContainer [2018-01-29 22:55:18,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-29 22:55:18,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-29 22:55:18,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-29 22:55:18,698 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-29 22:55:18,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 10:55:18" (1/3) ... [2018-01-29 22:55:18,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72192f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:55:18, skipping insertion in model container [2018-01-29 22:55:18,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:55:18" (2/3) ... [2018-01-29 22:55:18,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72192f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:55:18, skipping insertion in model container [2018-01-29 22:55:18,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:55:18" (3/3) ... [2018-01-29 22:55:18,701 INFO L107 eAbstractionObserver]: Analyzing ICFG standard_strcpy_false-valid-deref_ground.i [2018-01-29 22:55:18,712 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-29 22:55:18,720 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-29 22:55:18,759 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-29 22:55:18,759 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-29 22:55:18,759 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-29 22:55:18,759 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-29 22:55:18,760 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-29 22:55:18,760 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-29 22:55:18,760 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-29 22:55:18,760 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-29 22:55:18,761 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-29 22:55:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-01-29 22:55:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-29 22:55:18,788 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:18,789 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:18,789 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash 433409700, now seen corresponding path program 1 times [2018-01-29 22:55:18,798 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:18,798 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:18,850 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:18,851 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:18,851 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:18,890 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:18,948 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 22:55:18,950 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:55:18,950 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-29 22:55:18,951 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-29 22:55:18,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-29 22:55:18,962 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-29 22:55:18,965 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2018-01-29 22:55:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:19,051 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2018-01-29 22:55:19,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-29 22:55:19,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-01-29 22:55:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:19,061 INFO L225 Difference]: With dead ends: 86 [2018-01-29 22:55:19,061 INFO L226 Difference]: Without dead ends: 52 [2018-01-29 22:55:19,064 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 22:55:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-29 22:55:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2018-01-29 22:55:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-29 22:55:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-01-29 22:55:19,174 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 9 [2018-01-29 22:55:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:19,174 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-01-29 22:55:19,174 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-29 22:55:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-01-29 22:55:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-29 22:55:19,175 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:19,175 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:19,175 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:19,175 INFO L82 PathProgramCache]: Analyzing trace with hash 23906902, now seen corresponding path program 1 times [2018-01-29 22:55:19,176 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:19,176 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:19,176 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:19,177 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:19,177 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:19,187 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:19,232 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 22:55:19,232 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:55:19,232 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-29 22:55:19,234 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-29 22:55:19,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-29 22:55:19,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:55:19,235 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 4 states. [2018-01-29 22:55:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:19,285 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2018-01-29 22:55:19,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-29 22:55:19,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-29 22:55:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:19,287 INFO L225 Difference]: With dead ends: 58 [2018-01-29 22:55:19,287 INFO L226 Difference]: Without dead ends: 40 [2018-01-29 22:55:19,289 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:55:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-29 22:55:19,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-01-29 22:55:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-29 22:55:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-01-29 22:55:19,295 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 15 [2018-01-29 22:55:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:19,295 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-01-29 22:55:19,295 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-29 22:55:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-01-29 22:55:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-29 22:55:19,296 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:19,296 INFO L350 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:19,296 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2014656078, now seen corresponding path program 1 times [2018-01-29 22:55:19,297 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:19,297 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:19,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:19,299 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:19,299 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:19,304 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:19,354 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:19,354 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:55:19,369 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:19,398 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:19,454 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:19,454 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-01-29 22:55:19,455 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-29 22:55:19,455 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-29 22:55:19,455 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:55:19,455 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 4 states. [2018-01-29 22:55:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:19,518 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2018-01-29 22:55:19,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-29 22:55:19,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-29 22:55:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:19,520 INFO L225 Difference]: With dead ends: 62 [2018-01-29 22:55:19,520 INFO L226 Difference]: Without dead ends: 59 [2018-01-29 22:55:19,520 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:55:19,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-29 22:55:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2018-01-29 22:55:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-29 22:55:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-01-29 22:55:19,527 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 16 [2018-01-29 22:55:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:19,528 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-01-29 22:55:19,528 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-29 22:55:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-01-29 22:55:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-29 22:55:19,529 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:19,529 INFO L350 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:19,529 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:19,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1322336996, now seen corresponding path program 1 times [2018-01-29 22:55:19,530 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:19,530 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:19,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:19,531 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:19,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:19,539 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:19,598 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:19,598 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:55:19,605 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:19,616 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-29 22:55:19,644 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-29 22:55:19,644 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2018-01-29 22:55:19,688 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-29 22:55:19,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-29 22:55:19,689 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-29 22:55:19,689 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 6 states. [2018-01-29 22:55:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:19,794 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2018-01-29 22:55:19,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-29 22:55:19,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-01-29 22:55:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:19,796 INFO L225 Difference]: With dead ends: 75 [2018-01-29 22:55:19,796 INFO L226 Difference]: Without dead ends: 73 [2018-01-29 22:55:19,797 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-29 22:55:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-29 22:55:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2018-01-29 22:55:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-29 22:55:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-01-29 22:55:19,805 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 22 [2018-01-29 22:55:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:19,805 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-01-29 22:55:19,805 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-29 22:55:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-01-29 22:55:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-29 22:55:19,806 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:19,806 INFO L350 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:19,806 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:19,807 INFO L82 PathProgramCache]: Analyzing trace with hash -418028828, now seen corresponding path program 2 times [2018-01-29 22:55:19,807 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:19,807 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:19,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:19,808 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:19,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:19,816 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:19,912 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:19,912 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:19,921 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:55:19,926 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:19,934 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:19,934 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:19,936 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:19,966 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:19,966 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-01-29 22:55:19,966 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-29 22:55:19,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-29 22:55:19,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-29 22:55:19,967 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 5 states. [2018-01-29 22:55:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:20,027 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2018-01-29 22:55:20,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-29 22:55:20,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-01-29 22:55:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:20,029 INFO L225 Difference]: With dead ends: 93 [2018-01-29 22:55:20,029 INFO L226 Difference]: Without dead ends: 90 [2018-01-29 22:55:20,029 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-29 22:55:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-01-29 22:55:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2018-01-29 22:55:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-29 22:55:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2018-01-29 22:55:20,035 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 23 [2018-01-29 22:55:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:20,035 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2018-01-29 22:55:20,035 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-29 22:55:20,035 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2018-01-29 22:55:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-29 22:55:20,036 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:20,036 INFO L350 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:20,036 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:20,036 INFO L82 PathProgramCache]: Analyzing trace with hash -495489678, now seen corresponding path program 3 times [2018-01-29 22:55:20,037 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:20,037 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:20,037 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:20,038 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:20,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:20,044 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:20,130 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:20,130 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:20,135 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:55:20,139 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:20,141 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:20,143 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:20,144 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:20,145 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:20,147 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:20,189 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:20,189 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-01-29 22:55:20,189 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-29 22:55:20,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-29 22:55:20,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-29 22:55:20,190 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 6 states. [2018-01-29 22:55:20,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:20,334 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2018-01-29 22:55:20,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-29 22:55:20,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-01-29 22:55:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:20,336 INFO L225 Difference]: With dead ends: 116 [2018-01-29 22:55:20,336 INFO L226 Difference]: Without dead ends: 113 [2018-01-29 22:55:20,336 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-29 22:55:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-01-29 22:55:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 63. [2018-01-29 22:55:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-29 22:55:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2018-01-29 22:55:20,342 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 30 [2018-01-29 22:55:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:20,343 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2018-01-29 22:55:20,343 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-29 22:55:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2018-01-29 22:55:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-29 22:55:20,344 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:20,344 INFO L350 BasicCegarLoop]: trace histogram [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] [2018-01-29 22:55:20,344 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash -745917537, now seen corresponding path program 1 times [2018-01-29 22:55:20,344 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:20,344 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:20,345 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:20,345 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:20,345 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:20,354 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:20,437 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:20,437 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:55:20,444 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:20,453 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:20,520 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:20,520 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-01-29 22:55:20,521 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-29 22:55:20,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-29 22:55:20,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-01-29 22:55:20,521 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 10 states. [2018-01-29 22:55:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:20,620 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2018-01-29 22:55:20,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-29 22:55:20,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-01-29 22:55:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:20,622 INFO L225 Difference]: With dead ends: 89 [2018-01-29 22:55:20,622 INFO L226 Difference]: Without dead ends: 63 [2018-01-29 22:55:20,622 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-01-29 22:55:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-29 22:55:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-01-29 22:55:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-29 22:55:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2018-01-29 22:55:20,629 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 34 [2018-01-29 22:55:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:20,630 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2018-01-29 22:55:20,630 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-29 22:55:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2018-01-29 22:55:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-29 22:55:20,631 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:20,631 INFO L350 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:20,632 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 528287524, now seen corresponding path program 4 times [2018-01-29 22:55:20,632 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:20,632 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:20,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:20,633 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:20,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:20,640 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:20,742 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:20,742 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:20,752 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:55:20,761 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:20,763 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:20,793 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:20,793 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-01-29 22:55:20,794 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-29 22:55:20,794 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-29 22:55:20,794 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-29 22:55:20,794 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 7 states. [2018-01-29 22:55:20,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:20,970 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2018-01-29 22:55:20,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-29 22:55:20,971 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2018-01-29 22:55:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:20,972 INFO L225 Difference]: With dead ends: 123 [2018-01-29 22:55:20,972 INFO L226 Difference]: Without dead ends: 120 [2018-01-29 22:55:20,972 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-29 22:55:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-01-29 22:55:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 70. [2018-01-29 22:55:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-29 22:55:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2018-01-29 22:55:20,980 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 37 [2018-01-29 22:55:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:20,981 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2018-01-29 22:55:20,981 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-29 22:55:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2018-01-29 22:55:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-29 22:55:20,982 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:20,983 INFO L350 BasicCegarLoop]: trace histogram [3, 3, 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] [2018-01-29 22:55:20,983 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:20,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2078778449, now seen corresponding path program 2 times [2018-01-29 22:55:20,983 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:20,983 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:20,984 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:20,984 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:20,984 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:20,992 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-01-29 22:55:21,028 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:21,028 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:21,034 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:55:21,038 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:21,042 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:21,044 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:21,046 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-01-29 22:55:21,076 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:21,076 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-01-29 22:55:21,076 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-29 22:55:21,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-29 22:55:21,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-29 22:55:21,077 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 5 states. [2018-01-29 22:55:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:21,112 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-01-29 22:55:21,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-29 22:55:21,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2018-01-29 22:55:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:21,114 INFO L225 Difference]: With dead ends: 83 [2018-01-29 22:55:21,114 INFO L226 Difference]: Without dead ends: 81 [2018-01-29 22:55:21,114 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-29 22:55:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-29 22:55:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-01-29 22:55:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-29 22:55:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2018-01-29 22:55:21,120 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 41 [2018-01-29 22:55:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:21,120 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2018-01-29 22:55:21,120 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-29 22:55:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2018-01-29 22:55:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-29 22:55:21,122 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:21,122 INFO L350 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:21,122 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash -247824078, now seen corresponding path program 5 times [2018-01-29 22:55:21,122 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:21,123 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:21,123 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:21,123 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:21,123 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:21,131 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:21,233 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:21,233 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:21,241 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:55:21,244 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:21,245 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:21,246 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:21,248 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:21,249 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:21,251 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:21,252 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:21,254 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:21,285 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:21,285 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-01-29 22:55:21,286 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-29 22:55:21,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-29 22:55:21,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-29 22:55:21,286 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 8 states. [2018-01-29 22:55:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:21,409 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2018-01-29 22:55:21,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-29 22:55:21,409 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2018-01-29 22:55:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:21,411 INFO L225 Difference]: With dead ends: 186 [2018-01-29 22:55:21,411 INFO L226 Difference]: Without dead ends: 183 [2018-01-29 22:55:21,412 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-29 22:55:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-01-29 22:55:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 85. [2018-01-29 22:55:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-29 22:55:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2018-01-29 22:55:21,422 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 44 [2018-01-29 22:55:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:21,422 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2018-01-29 22:55:21,422 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-29 22:55:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2018-01-29 22:55:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-29 22:55:21,423 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:21,423 INFO L350 BasicCegarLoop]: trace histogram [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] [2018-01-29 22:55:21,423 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:21,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1122032012, now seen corresponding path program 3 times [2018-01-29 22:55:21,424 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:21,424 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:21,425 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:21,425 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:21,425 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:21,434 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-29 22:55:21,644 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:21,644 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:21,648 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:55:21,653 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:21,657 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:21,659 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:21,660 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:21,663 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-29 22:55:21,745 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:21,745 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-01-29 22:55:21,745 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-29 22:55:21,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-29 22:55:21,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2018-01-29 22:55:21,746 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 15 states. [2018-01-29 22:55:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:21,848 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2018-01-29 22:55:21,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-29 22:55:21,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2018-01-29 22:55:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:21,849 INFO L225 Difference]: With dead ends: 119 [2018-01-29 22:55:21,849 INFO L226 Difference]: Without dead ends: 85 [2018-01-29 22:55:21,850 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2018-01-29 22:55:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-29 22:55:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-01-29 22:55:21,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-29 22:55:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2018-01-29 22:55:21,859 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 53 [2018-01-29 22:55:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:21,859 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2018-01-29 22:55:21,859 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-29 22:55:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2018-01-29 22:55:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-29 22:55:21,861 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:21,861 INFO L350 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:21,861 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:21,861 INFO L82 PathProgramCache]: Analyzing trace with hash 512768868, now seen corresponding path program 6 times [2018-01-29 22:55:21,861 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:21,861 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:21,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:21,862 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:21,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:21,867 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:21,954 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:21,954 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:21,959 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:55:21,962 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:21,963 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:21,964 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:21,965 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:21,966 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:21,967 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:21,968 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:21,969 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:21,970 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:22,020 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:22,020 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-01-29 22:55:22,020 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-29 22:55:22,020 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-29 22:55:22,021 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-01-29 22:55:22,021 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 9 states. [2018-01-29 22:55:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:22,202 INFO L93 Difference]: Finished difference Result 193 states and 207 transitions. [2018-01-29 22:55:22,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-29 22:55:22,203 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2018-01-29 22:55:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:22,204 INFO L225 Difference]: With dead ends: 193 [2018-01-29 22:55:22,204 INFO L226 Difference]: Without dead ends: 190 [2018-01-29 22:55:22,205 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-01-29 22:55:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-29 22:55:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 92. [2018-01-29 22:55:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-29 22:55:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2018-01-29 22:55:22,212 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 51 [2018-01-29 22:55:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:22,212 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2018-01-29 22:55:22,212 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-29 22:55:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2018-01-29 22:55:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-01-29 22:55:22,213 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:22,213 INFO L350 BasicCegarLoop]: trace histogram [4, 4, 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] [2018-01-29 22:55:22,213 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1471444890, now seen corresponding path program 4 times [2018-01-29 22:55:22,214 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:22,214 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:22,214 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:22,215 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:22,215 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:22,223 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-29 22:55:22,312 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:22,312 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:22,317 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:55:22,329 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:22,331 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-01-29 22:55:22,392 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:22,392 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2018-01-29 22:55:22,392 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-29 22:55:22,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-29 22:55:22,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-01-29 22:55:22,393 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 16 states. [2018-01-29 22:55:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:22,625 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2018-01-29 22:55:22,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-29 22:55:22,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2018-01-29 22:55:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:22,626 INFO L225 Difference]: With dead ends: 133 [2018-01-29 22:55:22,626 INFO L226 Difference]: Without dead ends: 103 [2018-01-29 22:55:22,627 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2018-01-29 22:55:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-01-29 22:55:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2018-01-29 22:55:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-29 22:55:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2018-01-29 22:55:22,633 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 60 [2018-01-29 22:55:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:22,633 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2018-01-29 22:55:22,633 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-29 22:55:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2018-01-29 22:55:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-29 22:55:22,634 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:22,634 INFO L350 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:22,634 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:22,634 INFO L82 PathProgramCache]: Analyzing trace with hash 472909042, now seen corresponding path program 7 times [2018-01-29 22:55:22,634 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:22,634 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:22,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:22,635 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:22,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:22,640 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:22,748 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:22,748 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:22,760 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:22,776 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:22,807 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:22,808 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-01-29 22:55:22,808 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-29 22:55:22,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-29 22:55:22,808 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-01-29 22:55:22,809 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 10 states. [2018-01-29 22:55:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:22,964 INFO L93 Difference]: Finished difference Result 240 states and 259 transitions. [2018-01-29 22:55:22,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-29 22:55:22,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2018-01-29 22:55:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:22,967 INFO L225 Difference]: With dead ends: 240 [2018-01-29 22:55:22,967 INFO L226 Difference]: Without dead ends: 237 [2018-01-29 22:55:22,967 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-01-29 22:55:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-01-29 22:55:22,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 107. [2018-01-29 22:55:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-29 22:55:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2018-01-29 22:55:22,978 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 58 [2018-01-29 22:55:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:22,978 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2018-01-29 22:55:22,978 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-29 22:55:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2018-01-29 22:55:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-01-29 22:55:22,978 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:22,979 INFO L350 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:22,979 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash -925696092, now seen corresponding path program 8 times [2018-01-29 22:55:22,979 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:22,979 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:22,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:22,980 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:22,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:22,986 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:23,180 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:23,181 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:23,193 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:55:23,201 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:23,207 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:23,208 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:23,211 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:23,263 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:23,263 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-01-29 22:55:23,264 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-29 22:55:23,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-29 22:55:23,264 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-01-29 22:55:23,264 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 11 states. [2018-01-29 22:55:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:23,523 INFO L93 Difference]: Finished difference Result 279 states and 302 transitions. [2018-01-29 22:55:23,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-29 22:55:23,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2018-01-29 22:55:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:23,525 INFO L225 Difference]: With dead ends: 279 [2018-01-29 22:55:23,525 INFO L226 Difference]: Without dead ends: 276 [2018-01-29 22:55:23,526 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-01-29 22:55:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-01-29 22:55:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 114. [2018-01-29 22:55:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-01-29 22:55:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2018-01-29 22:55:23,538 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 65 [2018-01-29 22:55:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:23,538 INFO L432 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2018-01-29 22:55:23,538 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-29 22:55:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2018-01-29 22:55:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-01-29 22:55:23,539 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:23,539 INFO L350 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:23,540 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:23,540 INFO L82 PathProgramCache]: Analyzing trace with hash 575928498, now seen corresponding path program 9 times [2018-01-29 22:55:23,540 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:23,540 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:23,541 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:23,541 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:23,541 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:23,549 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:23,690 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:23,690 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:23,695 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:55:23,699 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,706 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,707 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,708 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,709 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,710 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,711 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,712 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,714 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,715 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:23,716 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:23,717 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:23,756 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:23,757 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-01-29 22:55:23,757 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-29 22:55:23,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-29 22:55:23,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-01-29 22:55:23,757 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand 12 states. [2018-01-29 22:55:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:24,042 INFO L93 Difference]: Finished difference Result 318 states and 345 transitions. [2018-01-29 22:55:24,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-29 22:55:24,043 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-01-29 22:55:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:24,044 INFO L225 Difference]: With dead ends: 318 [2018-01-29 22:55:24,045 INFO L226 Difference]: Without dead ends: 315 [2018-01-29 22:55:24,045 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-01-29 22:55:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-01-29 22:55:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 121. [2018-01-29 22:55:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-01-29 22:55:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2018-01-29 22:55:24,059 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 72 [2018-01-29 22:55:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:24,059 INFO L432 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2018-01-29 22:55:24,059 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-29 22:55:24,059 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2018-01-29 22:55:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-29 22:55:24,060 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:24,061 INFO L350 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:24,061 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2010866311, now seen corresponding path program 5 times [2018-01-29 22:55:24,061 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:24,061 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:24,062 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:24,062 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:24,062 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:24,073 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-01-29 22:55:24,215 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:24,215 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:24,220 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:55:24,224 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:24,226 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:24,229 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:24,233 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:24,236 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:24,237 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:24,240 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-01-29 22:55:24,356 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:24,356 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2018-01-29 22:55:24,357 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-29 22:55:24,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-29 22:55:24,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2018-01-29 22:55:24,358 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 21 states. [2018-01-29 22:55:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:24,685 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2018-01-29 22:55:24,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-29 22:55:24,686 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2018-01-29 22:55:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:24,687 INFO L225 Difference]: With dead ends: 170 [2018-01-29 22:55:24,687 INFO L226 Difference]: Without dead ends: 132 [2018-01-29 22:55:24,688 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2018-01-29 22:55:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-01-29 22:55:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2018-01-29 22:55:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-01-29 22:55:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2018-01-29 22:55:24,696 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 79 [2018-01-29 22:55:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:24,696 INFO L432 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2018-01-29 22:55:24,696 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-29 22:55:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2018-01-29 22:55:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-29 22:55:24,697 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:24,697 INFO L350 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:24,697 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -875998236, now seen corresponding path program 10 times [2018-01-29 22:55:24,697 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:24,697 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:24,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:24,698 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:24,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:24,703 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:24,838 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:24,838 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:24,843 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:55:24,854 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:24,855 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:24,894 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:24,894 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-01-29 22:55:24,894 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-29 22:55:24,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-29 22:55:24,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-01-29 22:55:24,894 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand 13 states. [2018-01-29 22:55:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:25,160 INFO L93 Difference]: Finished difference Result 381 states and 415 transitions. [2018-01-29 22:55:25,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-29 22:55:25,161 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2018-01-29 22:55:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:25,163 INFO L225 Difference]: With dead ends: 381 [2018-01-29 22:55:25,163 INFO L226 Difference]: Without dead ends: 378 [2018-01-29 22:55:25,164 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-01-29 22:55:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-01-29 22:55:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 136. [2018-01-29 22:55:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-01-29 22:55:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2018-01-29 22:55:25,179 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 79 [2018-01-29 22:55:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:25,180 INFO L432 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2018-01-29 22:55:25,180 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-29 22:55:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2018-01-29 22:55:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-01-29 22:55:25,181 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:25,181 INFO L350 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:25,181 INFO L371 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -643670926, now seen corresponding path program 11 times [2018-01-29 22:55:25,182 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:25,182 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:25,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:25,183 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:25,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:25,190 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:25,337 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:25,338 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:25,342 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:55:25,345 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,346 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,347 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,348 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,349 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,351 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,352 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,353 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,355 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,357 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,359 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,361 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:25,362 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:25,363 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:25,403 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:25,404 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-01-29 22:55:25,404 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-29 22:55:25,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-29 22:55:25,404 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-01-29 22:55:25,405 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand 14 states. [2018-01-29 22:55:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:25,733 INFO L93 Difference]: Finished difference Result 428 states and 467 transitions. [2018-01-29 22:55:25,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-29 22:55:25,733 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 86 [2018-01-29 22:55:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:25,736 INFO L225 Difference]: With dead ends: 428 [2018-01-29 22:55:25,736 INFO L226 Difference]: Without dead ends: 425 [2018-01-29 22:55:25,737 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-01-29 22:55:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2018-01-29 22:55:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 143. [2018-01-29 22:55:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-01-29 22:55:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2018-01-29 22:55:25,753 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 86 [2018-01-29 22:55:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:25,754 INFO L432 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2018-01-29 22:55:25,754 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-29 22:55:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2018-01-29 22:55:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-01-29 22:55:25,755 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:25,755 INFO L350 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:25,755 INFO L371 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash -571000796, now seen corresponding path program 12 times [2018-01-29 22:55:25,756 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:25,756 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:25,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:25,757 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:25,757 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:25,764 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:26,030 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:26,030 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:26,036 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:55:26,040 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,042 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,043 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,044 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,045 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,046 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,047 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,048 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,050 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,051 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,052 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,054 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,057 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,058 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:26,060 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:26,101 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:26,101 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-01-29 22:55:26,101 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-29 22:55:26,102 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-29 22:55:26,102 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-01-29 22:55:26,102 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 15 states. [2018-01-29 22:55:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:26,480 INFO L93 Difference]: Finished difference Result 475 states and 519 transitions. [2018-01-29 22:55:26,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-29 22:55:26,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2018-01-29 22:55:26,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:26,483 INFO L225 Difference]: With dead ends: 475 [2018-01-29 22:55:26,483 INFO L226 Difference]: Without dead ends: 472 [2018-01-29 22:55:26,483 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-01-29 22:55:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2018-01-29 22:55:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2018-01-29 22:55:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-29 22:55:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2018-01-29 22:55:26,501 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 93 [2018-01-29 22:55:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:26,501 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2018-01-29 22:55:26,502 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-29 22:55:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2018-01-29 22:55:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-01-29 22:55:26,503 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:26,503 INFO L350 BasicCegarLoop]: trace histogram [6, 6, 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] [2018-01-29 22:55:26,503 INFO L371 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:26,503 INFO L82 PathProgramCache]: Analyzing trace with hash -301622704, now seen corresponding path program 6 times [2018-01-29 22:55:26,503 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:26,504 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:26,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:26,504 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:26,505 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:26,514 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-01-29 22:55:26,664 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:26,664 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:26,669 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:55:26,674 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,676 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,678 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,680 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,683 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,686 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:26,688 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:26,690 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-01-29 22:55:26,724 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:26,725 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-01-29 22:55:26,725 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-29 22:55:26,725 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-29 22:55:26,725 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-01-29 22:55:26,725 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand 11 states. [2018-01-29 22:55:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:27,161 INFO L93 Difference]: Finished difference Result 163 states and 177 transitions. [2018-01-29 22:55:27,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-29 22:55:27,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 98 [2018-01-29 22:55:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:27,163 INFO L225 Difference]: With dead ends: 163 [2018-01-29 22:55:27,163 INFO L226 Difference]: Without dead ends: 161 [2018-01-29 22:55:27,163 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-01-29 22:55:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-01-29 22:55:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-01-29 22:55:27,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-29 22:55:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 171 transitions. [2018-01-29 22:55:27,177 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 171 transitions. Word has length 98 [2018-01-29 22:55:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:27,178 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 171 transitions. [2018-01-29 22:55:27,178 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-29 22:55:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 171 transitions. [2018-01-29 22:55:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-01-29 22:55:27,179 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:27,179 INFO L350 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:27,179 INFO L371 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:27,179 INFO L82 PathProgramCache]: Analyzing trace with hash -283693006, now seen corresponding path program 13 times [2018-01-29 22:55:27,179 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:27,180 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:27,180 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:27,180 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:27,180 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:27,188 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:27,461 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:27,461 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:27,466 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:27,484 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:27,530 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:27,530 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-01-29 22:55:27,531 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-29 22:55:27,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-29 22:55:27,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-01-29 22:55:27,531 INFO L87 Difference]: Start difference. First operand 158 states and 171 transitions. Second operand 16 states. [2018-01-29 22:55:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:28,551 INFO L93 Difference]: Finished difference Result 602 states and 661 transitions. [2018-01-29 22:55:28,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-29 22:55:28,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 100 [2018-01-29 22:55:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:28,554 INFO L225 Difference]: With dead ends: 602 [2018-01-29 22:55:28,554 INFO L226 Difference]: Without dead ends: 599 [2018-01-29 22:55:28,554 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-01-29 22:55:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2018-01-29 22:55:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 165. [2018-01-29 22:55:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-01-29 22:55:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2018-01-29 22:55:28,576 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 100 [2018-01-29 22:55:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:28,576 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2018-01-29 22:55:28,576 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-29 22:55:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2018-01-29 22:55:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-01-29 22:55:28,578 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:28,578 INFO L350 BasicCegarLoop]: trace histogram [6, 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] [2018-01-29 22:55:28,578 INFO L371 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1799014667, now seen corresponding path program 7 times [2018-01-29 22:55:28,578 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:28,578 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:28,579 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:28,579 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:28,579 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:28,589 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 65 proven. 115 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-29 22:55:28,797 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:28,797 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:28,809 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:28,826 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 95 proven. 85 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-29 22:55:29,034 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:29,035 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2018-01-29 22:55:29,035 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-29 22:55:29,035 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-29 22:55:29,036 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2018-01-29 22:55:29,036 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 30 states. [2018-01-29 22:55:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:29,286 INFO L93 Difference]: Finished difference Result 223 states and 242 transitions. [2018-01-29 22:55:29,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-29 22:55:29,287 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2018-01-29 22:55:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:29,288 INFO L225 Difference]: With dead ends: 223 [2018-01-29 22:55:29,288 INFO L226 Difference]: Without dead ends: 165 [2018-01-29 22:55:29,288 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2018-01-29 22:55:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-01-29 22:55:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-01-29 22:55:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-01-29 22:55:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2018-01-29 22:55:29,298 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 110 [2018-01-29 22:55:29,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:29,298 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2018-01-29 22:55:29,298 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-29 22:55:29,298 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2018-01-29 22:55:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-01-29 22:55:29,299 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:29,299 INFO L350 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:29,300 INFO L371 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -18830236, now seen corresponding path program 14 times [2018-01-29 22:55:29,300 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:29,300 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:29,301 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:29,301 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:29,301 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:29,308 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:29,498 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:29,498 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:29,503 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:55:29,507 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:29,513 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:29,514 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:29,517 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:29,573 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:29,573 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-01-29 22:55:29,573 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-29 22:55:29,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-29 22:55:29,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-01-29 22:55:29,573 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand 17 states. [2018-01-29 22:55:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:30,009 INFO L93 Difference]: Finished difference Result 609 states and 668 transitions. [2018-01-29 22:55:30,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-29 22:55:30,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 107 [2018-01-29 22:55:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:30,013 INFO L225 Difference]: With dead ends: 609 [2018-01-29 22:55:30,013 INFO L226 Difference]: Without dead ends: 606 [2018-01-29 22:55:30,014 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-01-29 22:55:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2018-01-29 22:55:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 172. [2018-01-29 22:55:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-01-29 22:55:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-01-29 22:55:30,036 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 107 [2018-01-29 22:55:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:30,036 INFO L432 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-01-29 22:55:30,036 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-29 22:55:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-01-29 22:55:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-01-29 22:55:30,037 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:30,038 INFO L350 BasicCegarLoop]: trace histogram [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] [2018-01-29 22:55:30,038 INFO L371 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash -284938563, now seen corresponding path program 8 times [2018-01-29 22:55:30,038 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:30,038 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:30,039 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:30,039 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:30,039 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:30,050 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 60 proven. 158 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-29 22:55:30,263 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:30,263 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:30,268 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:55:30,272 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:30,280 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:30,282 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:30,284 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-29 22:55:30,345 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:30,345 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2018-01-29 22:55:30,345 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-29 22:55:30,345 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-29 22:55:30,346 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2018-01-29 22:55:30,346 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 23 states. [2018-01-29 22:55:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:30,583 INFO L93 Difference]: Finished difference Result 223 states and 243 transitions. [2018-01-29 22:55:30,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-29 22:55:30,584 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2018-01-29 22:55:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:30,585 INFO L225 Difference]: With dead ends: 223 [2018-01-29 22:55:30,585 INFO L226 Difference]: Without dead ends: 172 [2018-01-29 22:55:30,585 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2018-01-29 22:55:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-29 22:55:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-01-29 22:55:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-01-29 22:55:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 185 transitions. [2018-01-29 22:55:30,597 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 185 transitions. Word has length 117 [2018-01-29 22:55:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:30,598 INFO L432 AbstractCegarLoop]: Abstraction has 172 states and 185 transitions. [2018-01-29 22:55:30,598 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-29 22:55:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 185 transitions. [2018-01-29 22:55:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-01-29 22:55:30,598 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:30,598 INFO L350 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:30,598 INFO L371 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1498516494, now seen corresponding path program 15 times [2018-01-29 22:55:30,599 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:30,599 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:30,599 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:30,599 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:30,599 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:30,605 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:30,855 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:30,856 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:30,861 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:55:30,864 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,865 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,866 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,867 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,869 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,870 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,873 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,874 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,877 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,879 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,882 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,885 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,893 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,896 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,901 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:30,902 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:30,905 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:30,960 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:30,960 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-01-29 22:55:30,960 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-29 22:55:30,960 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-29 22:55:30,960 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-01-29 22:55:30,961 INFO L87 Difference]: Start difference. First operand 172 states and 185 transitions. Second operand 18 states. [2018-01-29 22:55:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:31,447 INFO L93 Difference]: Finished difference Result 616 states and 675 transitions. [2018-01-29 22:55:31,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-29 22:55:31,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2018-01-29 22:55:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:31,449 INFO L225 Difference]: With dead ends: 616 [2018-01-29 22:55:31,450 INFO L226 Difference]: Without dead ends: 613 [2018-01-29 22:55:31,450 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-01-29 22:55:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2018-01-29 22:55:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 179. [2018-01-29 22:55:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-01-29 22:55:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 193 transitions. [2018-01-29 22:55:31,465 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 193 transitions. Word has length 114 [2018-01-29 22:55:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:31,465 INFO L432 AbstractCegarLoop]: Abstraction has 179 states and 193 transitions. [2018-01-29 22:55:31,465 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-29 22:55:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 193 transitions. [2018-01-29 22:55:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-01-29 22:55:31,466 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:31,466 INFO L350 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:31,466 INFO L371 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1482710219, now seen corresponding path program 9 times [2018-01-29 22:55:31,466 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:31,466 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:31,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:31,467 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:31,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:31,476 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2018-01-29 22:55:31,858 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:31,858 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:31,865 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:55:31,870 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:31,872 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:31,875 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:31,878 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:31,884 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:31,887 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:31,888 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:31,891 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2018-01-29 22:55:31,939 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:31,939 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-01-29 22:55:31,939 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-29 22:55:31,939 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-29 22:55:31,940 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-01-29 22:55:31,940 INFO L87 Difference]: Start difference. First operand 179 states and 193 transitions. Second operand 13 states. [2018-01-29 22:55:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:32,109 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2018-01-29 22:55:32,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-29 22:55:32,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 124 [2018-01-29 22:55:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:32,111 INFO L225 Difference]: With dead ends: 192 [2018-01-29 22:55:32,111 INFO L226 Difference]: Without dead ends: 190 [2018-01-29 22:55:32,111 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2018-01-29 22:55:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-29 22:55:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2018-01-29 22:55:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-01-29 22:55:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2018-01-29 22:55:32,125 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 124 [2018-01-29 22:55:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:32,125 INFO L432 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2018-01-29 22:55:32,125 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-29 22:55:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2018-01-29 22:55:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-01-29 22:55:32,126 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:32,126 INFO L350 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:32,126 INFO L371 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1224101724, now seen corresponding path program 16 times [2018-01-29 22:55:32,127 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:32,127 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:32,127 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:32,127 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:32,128 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:32,136 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:32,429 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:32,429 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:32,435 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:55:32,452 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:32,455 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:32,510 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:32,510 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-01-29 22:55:32,510 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-29 22:55:32,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-29 22:55:32,511 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-01-29 22:55:32,511 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand 19 states. [2018-01-29 22:55:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:33,108 INFO L93 Difference]: Finished difference Result 759 states and 835 transitions. [2018-01-29 22:55:33,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-29 22:55:33,109 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 121 [2018-01-29 22:55:33,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:33,111 INFO L225 Difference]: With dead ends: 759 [2018-01-29 22:55:33,111 INFO L226 Difference]: Without dead ends: 756 [2018-01-29 22:55:33,112 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-01-29 22:55:33,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2018-01-29 22:55:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 194. [2018-01-29 22:55:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-01-29 22:55:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 210 transitions. [2018-01-29 22:55:33,128 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 210 transitions. Word has length 121 [2018-01-29 22:55:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:33,129 INFO L432 AbstractCegarLoop]: Abstraction has 194 states and 210 transitions. [2018-01-29 22:55:33,129 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-29 22:55:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 210 transitions. [2018-01-29 22:55:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-01-29 22:55:33,129 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:33,129 INFO L350 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:33,130 INFO L371 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:33,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1687935054, now seen corresponding path program 17 times [2018-01-29 22:55:33,130 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:33,130 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:33,130 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:33,130 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:33,131 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:33,139 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:33,515 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:33,515 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:33,521 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:55:33,525 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,526 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,527 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,528 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,529 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,530 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,531 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,533 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,534 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,536 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,538 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,540 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,542 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,545 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,548 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,551 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,555 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,559 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:33,560 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:33,562 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:33,622 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:33,622 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-01-29 22:55:33,622 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-29 22:55:33,622 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-29 22:55:33,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-01-29 22:55:33,622 INFO L87 Difference]: Start difference. First operand 194 states and 210 transitions. Second operand 20 states. [2018-01-29 22:55:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:34,260 INFO L93 Difference]: Finished difference Result 822 states and 905 transitions. [2018-01-29 22:55:34,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-29 22:55:34,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 128 [2018-01-29 22:55:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:34,265 INFO L225 Difference]: With dead ends: 822 [2018-01-29 22:55:34,265 INFO L226 Difference]: Without dead ends: 819 [2018-01-29 22:55:34,265 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-01-29 22:55:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-01-29 22:55:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 201. [2018-01-29 22:55:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-01-29 22:55:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 218 transitions. [2018-01-29 22:55:34,290 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 218 transitions. Word has length 128 [2018-01-29 22:55:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:34,290 INFO L432 AbstractCegarLoop]: Abstraction has 201 states and 218 transitions. [2018-01-29 22:55:34,290 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-29 22:55:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 218 transitions. [2018-01-29 22:55:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-01-29 22:55:34,290 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:34,291 INFO L350 BasicCegarLoop]: trace histogram [8, 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] [2018-01-29 22:55:34,291 INFO L371 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:34,291 INFO L82 PathProgramCache]: Analyzing trace with hash 41331462, now seen corresponding path program 10 times [2018-01-29 22:55:34,291 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:34,291 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:34,291 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:34,292 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:34,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:34,300 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-01-29 22:55:34,518 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:34,518 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:34,523 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:55:34,539 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:34,542 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-01-29 22:55:34,609 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:34,609 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-01-29 22:55:34,609 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-29 22:55:34,609 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-29 22:55:34,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-01-29 22:55:34,609 INFO L87 Difference]: Start difference. First operand 201 states and 218 transitions. Second operand 15 states. [2018-01-29 22:55:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:34,862 INFO L93 Difference]: Finished difference Result 214 states and 233 transitions. [2018-01-29 22:55:34,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-29 22:55:34,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 136 [2018-01-29 22:55:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:34,863 INFO L225 Difference]: With dead ends: 214 [2018-01-29 22:55:34,863 INFO L226 Difference]: Without dead ends: 212 [2018-01-29 22:55:34,864 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2018-01-29 22:55:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-01-29 22:55:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2018-01-29 22:55:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-01-29 22:55:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 227 transitions. [2018-01-29 22:55:34,884 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 227 transitions. Word has length 136 [2018-01-29 22:55:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:34,884 INFO L432 AbstractCegarLoop]: Abstraction has 209 states and 227 transitions. [2018-01-29 22:55:34,884 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-29 22:55:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 227 transitions. [2018-01-29 22:55:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-01-29 22:55:34,885 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:34,886 INFO L350 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:34,886 INFO L371 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1475757284, now seen corresponding path program 18 times [2018-01-29 22:55:34,886 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:34,886 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:34,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:34,887 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:34,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:34,895 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:35,224 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:35,224 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:35,228 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:55:35,232 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,233 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,234 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,235 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,236 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,237 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,238 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,239 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,240 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,241 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,242 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,244 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,246 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,248 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,252 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,260 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,263 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,265 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,269 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:35,269 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:35,272 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:35,319 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:35,319 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-01-29 22:55:35,320 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-29 22:55:35,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-29 22:55:35,320 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-01-29 22:55:35,320 INFO L87 Difference]: Start difference. First operand 209 states and 227 transitions. Second operand 21 states. [2018-01-29 22:55:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:36,048 INFO L93 Difference]: Finished difference Result 989 states and 1092 transitions. [2018-01-29 22:55:36,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-29 22:55:36,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 135 [2018-01-29 22:55:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:36,051 INFO L225 Difference]: With dead ends: 989 [2018-01-29 22:55:36,052 INFO L226 Difference]: Without dead ends: 986 [2018-01-29 22:55:36,052 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-01-29 22:55:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2018-01-29 22:55:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 216. [2018-01-29 22:55:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-01-29 22:55:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 235 transitions. [2018-01-29 22:55:36,080 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 235 transitions. Word has length 135 [2018-01-29 22:55:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:36,080 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 235 transitions. [2018-01-29 22:55:36,080 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-29 22:55:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 235 transitions. [2018-01-29 22:55:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-01-29 22:55:36,081 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:36,081 INFO L350 BasicCegarLoop]: trace histogram [8, 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] [2018-01-29 22:55:36,081 INFO L371 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:36,081 INFO L82 PathProgramCache]: Analyzing trace with hash 532314305, now seen corresponding path program 11 times [2018-01-29 22:55:36,082 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:36,082 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:36,082 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:36,082 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:36,082 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:36,091 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 145 proven. 212 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-01-29 22:55:36,344 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:36,344 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:36,349 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:55:36,354 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:36,356 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:36,358 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:36,361 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:36,363 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:36,366 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:36,369 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:36,372 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:36,373 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:36,376 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 189 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-01-29 22:55:36,640 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:36,640 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2018-01-29 22:55:36,640 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-29 22:55:36,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-29 22:55:36,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2018-01-29 22:55:36,641 INFO L87 Difference]: Start difference. First operand 216 states and 235 transitions. Second operand 40 states. [2018-01-29 22:55:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:36,988 INFO L93 Difference]: Finished difference Result 290 states and 316 transitions. [2018-01-29 22:55:36,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-29 22:55:36,988 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 148 [2018-01-29 22:55:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:36,989 INFO L225 Difference]: With dead ends: 290 [2018-01-29 22:55:36,989 INFO L226 Difference]: Without dead ends: 216 [2018-01-29 22:55:36,990 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=2283, Unknown=0, NotChecked=0, Total=2862 [2018-01-29 22:55:36,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-01-29 22:55:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-01-29 22:55:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-01-29 22:55:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 234 transitions. [2018-01-29 22:55:37,008 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 234 transitions. Word has length 148 [2018-01-29 22:55:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:37,008 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 234 transitions. [2018-01-29 22:55:37,008 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-29 22:55:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 234 transitions. [2018-01-29 22:55:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-01-29 22:55:37,009 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:37,009 INFO L350 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:37,009 INFO L371 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:37,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2134133618, now seen corresponding path program 19 times [2018-01-29 22:55:37,009 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:37,009 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:37,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:37,010 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:37,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:37,016 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:37,372 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:37,372 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:37,377 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:37,391 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:37,441 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:37,441 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-01-29 22:55:37,441 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-29 22:55:37,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-29 22:55:37,442 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-01-29 22:55:37,442 INFO L87 Difference]: Start difference. First operand 216 states and 234 transitions. Second operand 22 states. [2018-01-29 22:55:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:38,250 INFO L93 Difference]: Finished difference Result 996 states and 1099 transitions. [2018-01-29 22:55:38,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-29 22:55:38,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2018-01-29 22:55:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:38,254 INFO L225 Difference]: With dead ends: 996 [2018-01-29 22:55:38,254 INFO L226 Difference]: Without dead ends: 993 [2018-01-29 22:55:38,254 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-01-29 22:55:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2018-01-29 22:55:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 223. [2018-01-29 22:55:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-01-29 22:55:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 242 transitions. [2018-01-29 22:55:38,279 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 242 transitions. Word has length 142 [2018-01-29 22:55:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:38,279 INFO L432 AbstractCegarLoop]: Abstraction has 223 states and 242 transitions. [2018-01-29 22:55:38,279 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-29 22:55:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 242 transitions. [2018-01-29 22:55:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-01-29 22:55:38,280 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:38,280 INFO L350 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:38,280 INFO L371 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:38,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1459877645, now seen corresponding path program 12 times [2018-01-29 22:55:38,281 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:38,281 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:38,281 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:38,281 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:38,281 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:38,289 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2018-01-29 22:55:38,556 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:38,557 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:38,563 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:55:38,569 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,571 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,575 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,577 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,580 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,583 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,586 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,589 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,593 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:38,594 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:38,598 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2018-01-29 22:55:38,655 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:38,656 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-01-29 22:55:38,656 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-29 22:55:38,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-29 22:55:38,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-01-29 22:55:38,657 INFO L87 Difference]: Start difference. First operand 223 states and 242 transitions. Second operand 17 states. [2018-01-29 22:55:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:38,960 INFO L93 Difference]: Finished difference Result 236 states and 257 transitions. [2018-01-29 22:55:38,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-29 22:55:38,960 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 155 [2018-01-29 22:55:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:38,961 INFO L225 Difference]: With dead ends: 236 [2018-01-29 22:55:38,962 INFO L226 Difference]: Without dead ends: 234 [2018-01-29 22:55:38,962 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2018-01-29 22:55:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-01-29 22:55:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2018-01-29 22:55:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-01-29 22:55:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 251 transitions. [2018-01-29 22:55:38,982 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 251 transitions. Word has length 155 [2018-01-29 22:55:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:38,983 INFO L432 AbstractCegarLoop]: Abstraction has 231 states and 251 transitions. [2018-01-29 22:55:38,983 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-29 22:55:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 251 transitions. [2018-01-29 22:55:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-01-29 22:55:38,984 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:38,984 INFO L350 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:38,984 INFO L371 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1009412388, now seen corresponding path program 20 times [2018-01-29 22:55:38,984 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:38,984 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:38,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:38,985 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:38,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:38,991 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:39,331 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:39,331 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:39,336 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:55:39,340 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:39,348 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:39,349 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:39,352 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:39,404 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:39,405 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-01-29 22:55:39,405 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-29 22:55:39,405 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-29 22:55:39,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-01-29 22:55:39,406 INFO L87 Difference]: Start difference. First operand 231 states and 251 transitions. Second operand 23 states. [2018-01-29 22:55:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:40,334 INFO L93 Difference]: Finished difference Result 1179 states and 1304 transitions. [2018-01-29 22:55:40,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-29 22:55:40,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 149 [2018-01-29 22:55:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:40,338 INFO L225 Difference]: With dead ends: 1179 [2018-01-29 22:55:40,338 INFO L226 Difference]: Without dead ends: 1176 [2018-01-29 22:55:40,339 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-01-29 22:55:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2018-01-29 22:55:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 238. [2018-01-29 22:55:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-01-29 22:55:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 259 transitions. [2018-01-29 22:55:40,386 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 259 transitions. Word has length 149 [2018-01-29 22:55:40,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:40,387 INFO L432 AbstractCegarLoop]: Abstraction has 238 states and 259 transitions. [2018-01-29 22:55:40,387 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-29 22:55:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 259 transitions. [2018-01-29 22:55:40,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-01-29 22:55:40,388 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:40,388 INFO L350 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:40,389 INFO L371 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:40,389 INFO L82 PathProgramCache]: Analyzing trace with hash -618995918, now seen corresponding path program 21 times [2018-01-29 22:55:40,389 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:40,389 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:40,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:40,390 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:40,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:40,398 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:40,782 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:40,782 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:40,787 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:55:40,791 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,792 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,793 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,794 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,795 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,796 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,797 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,799 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,800 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,801 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,803 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,805 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,807 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,809 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,811 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,814 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,817 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,820 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,824 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,828 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,832 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,837 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:40,838 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:40,840 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:40,905 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:40,905 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-01-29 22:55:40,905 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-29 22:55:40,905 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-29 22:55:40,906 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-01-29 22:55:40,906 INFO L87 Difference]: Start difference. First operand 238 states and 259 transitions. Second operand 24 states. [2018-01-29 22:55:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:41,939 INFO L93 Difference]: Finished difference Result 1258 states and 1392 transitions. [2018-01-29 22:55:41,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-29 22:55:41,940 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 156 [2018-01-29 22:55:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:41,944 INFO L225 Difference]: With dead ends: 1258 [2018-01-29 22:55:41,944 INFO L226 Difference]: Without dead ends: 1255 [2018-01-29 22:55:41,944 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-01-29 22:55:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2018-01-29 22:55:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 245. [2018-01-29 22:55:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-01-29 22:55:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 267 transitions. [2018-01-29 22:55:41,984 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 267 transitions. Word has length 156 [2018-01-29 22:55:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:41,984 INFO L432 AbstractCegarLoop]: Abstraction has 245 states and 267 transitions. [2018-01-29 22:55:41,984 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-29 22:55:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 267 transitions. [2018-01-29 22:55:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-01-29 22:55:41,986 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:41,986 INFO L350 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:41,986 INFO L371 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:41,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1888920786, now seen corresponding path program 13 times [2018-01-29 22:55:41,986 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:41,987 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:41,987 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:41,987 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:41,988 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:41,998 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 197 proven. 271 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-01-29 22:55:42,478 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:42,478 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:42,483 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:42,503 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 248 proven. 220 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-01-29 22:55:43,209 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:43,209 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 45 [2018-01-29 22:55:43,209 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-01-29 22:55:43,209 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-01-29 22:55:43,210 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1659, Unknown=0, NotChecked=0, Total=1980 [2018-01-29 22:55:43,210 INFO L87 Difference]: Start difference. First operand 245 states and 267 transitions. Second operand 45 states. [2018-01-29 22:55:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:43,726 INFO L93 Difference]: Finished difference Result 327 states and 357 transitions. [2018-01-29 22:55:43,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-29 22:55:43,726 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 167 [2018-01-29 22:55:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:43,727 INFO L225 Difference]: With dead ends: 327 [2018-01-29 22:55:43,727 INFO L226 Difference]: Without dead ends: 245 [2018-01-29 22:55:43,728 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=735, Invalid=2925, Unknown=0, NotChecked=0, Total=3660 [2018-01-29 22:55:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-01-29 22:55:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-01-29 22:55:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-01-29 22:55:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 266 transitions. [2018-01-29 22:55:43,754 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 266 transitions. Word has length 167 [2018-01-29 22:55:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:43,754 INFO L432 AbstractCegarLoop]: Abstraction has 245 states and 266 transitions. [2018-01-29 22:55:43,754 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-01-29 22:55:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 266 transitions. [2018-01-29 22:55:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-01-29 22:55:43,755 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:43,755 INFO L350 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:43,755 INFO L371 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash 120200548, now seen corresponding path program 22 times [2018-01-29 22:55:43,755 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:43,755 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:43,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:43,756 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:43,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:43,763 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:44,342 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:44,342 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:44,346 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:55:44,372 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:44,375 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:44,433 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:44,433 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-01-29 22:55:44,433 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-29 22:55:44,434 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-29 22:55:44,434 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-01-29 22:55:44,434 INFO L87 Difference]: Start difference. First operand 245 states and 266 transitions. Second operand 25 states. [2018-01-29 22:55:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:45,560 INFO L93 Difference]: Finished difference Result 1265 states and 1399 transitions. [2018-01-29 22:55:45,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-29 22:55:45,561 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 163 [2018-01-29 22:55:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:45,566 INFO L225 Difference]: With dead ends: 1265 [2018-01-29 22:55:45,566 INFO L226 Difference]: Without dead ends: 1262 [2018-01-29 22:55:45,567 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-01-29 22:55:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2018-01-29 22:55:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 252. [2018-01-29 22:55:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-29 22:55:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 274 transitions. [2018-01-29 22:55:45,607 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 274 transitions. Word has length 163 [2018-01-29 22:55:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:45,607 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 274 transitions. [2018-01-29 22:55:45,607 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-29 22:55:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 274 transitions. [2018-01-29 22:55:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-01-29 22:55:45,608 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:45,608 INFO L350 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:45,608 INFO L371 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:45,608 INFO L82 PathProgramCache]: Analyzing trace with hash 448375228, now seen corresponding path program 14 times [2018-01-29 22:55:45,608 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:45,608 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:45,609 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:45,609 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:45,609 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:45,618 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 248 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2018-01-29 22:55:46,036 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:46,036 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:46,040 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:55:46,045 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:46,057 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:46,059 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:46,061 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 240 proven. 287 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-01-29 22:55:46,604 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:46,604 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 45 [2018-01-29 22:55:46,604 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-29 22:55:46,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-29 22:55:46,605 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2018-01-29 22:55:46,605 INFO L87 Difference]: Start difference. First operand 252 states and 274 transitions. Second operand 46 states. [2018-01-29 22:55:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:47,812 INFO L93 Difference]: Finished difference Result 341 states and 376 transitions. [2018-01-29 22:55:47,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-01-29 22:55:47,812 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 174 [2018-01-29 22:55:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:47,813 INFO L225 Difference]: With dead ends: 341 [2018-01-29 22:55:47,813 INFO L226 Difference]: Without dead ends: 263 [2018-01-29 22:55:47,815 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=669, Invalid=7163, Unknown=0, NotChecked=0, Total=7832 [2018-01-29 22:55:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-01-29 22:55:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2018-01-29 22:55:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-01-29 22:55:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 282 transitions. [2018-01-29 22:55:47,852 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 282 transitions. Word has length 174 [2018-01-29 22:55:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:47,853 INFO L432 AbstractCegarLoop]: Abstraction has 260 states and 282 transitions. [2018-01-29 22:55:47,853 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-29 22:55:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 282 transitions. [2018-01-29 22:55:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-01-29 22:55:47,854 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:47,854 INFO L350 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:47,854 INFO L371 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash -820780302, now seen corresponding path program 23 times [2018-01-29 22:55:47,855 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:47,855 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:47,855 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:47,856 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:47,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:47,864 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 0 proven. 1817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:48,282 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:48,282 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:48,286 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:55:48,290 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,291 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,295 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,296 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,297 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,299 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,300 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,302 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,304 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,307 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,309 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,312 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,315 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,319 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,323 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,327 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,332 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,338 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,344 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,351 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,359 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:48,360 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:48,362 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 0 proven. 1817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:48,426 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:48,427 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-01-29 22:55:48,427 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-29 22:55:48,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-29 22:55:48,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-01-29 22:55:48,427 INFO L87 Difference]: Start difference. First operand 260 states and 282 transitions. Second operand 26 states. [2018-01-29 22:55:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:49,662 INFO L93 Difference]: Finished difference Result 1392 states and 1541 transitions. [2018-01-29 22:55:49,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-29 22:55:49,662 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 170 [2018-01-29 22:55:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:49,666 INFO L225 Difference]: With dead ends: 1392 [2018-01-29 22:55:49,666 INFO L226 Difference]: Without dead ends: 1389 [2018-01-29 22:55:49,667 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-01-29 22:55:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2018-01-29 22:55:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 267. [2018-01-29 22:55:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-01-29 22:55:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 290 transitions. [2018-01-29 22:55:49,703 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 290 transitions. Word has length 170 [2018-01-29 22:55:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:49,703 INFO L432 AbstractCegarLoop]: Abstraction has 267 states and 290 transitions. [2018-01-29 22:55:49,704 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-29 22:55:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 290 transitions. [2018-01-29 22:55:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-01-29 22:55:49,705 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:49,705 INFO L350 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:49,705 INFO L371 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash -445029980, now seen corresponding path program 24 times [2018-01-29 22:55:49,706 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:49,706 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:49,706 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:49,706 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:49,707 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:49,720 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:50,452 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:50,452 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:50,457 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:55:50,462 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,463 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,464 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,465 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,466 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,467 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,468 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,469 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,470 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,472 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,473 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,475 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,477 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,478 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,480 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,483 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,490 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,493 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,496 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,500 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,504 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,508 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,513 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,519 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,523 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:55:50,524 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:50,527 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:50,602 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:50,603 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-01-29 22:55:50,603 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-29 22:55:50,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-29 22:55:50,603 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-01-29 22:55:50,603 INFO L87 Difference]: Start difference. First operand 267 states and 290 transitions. Second operand 27 states. [2018-01-29 22:55:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:51,981 INFO L93 Difference]: Finished difference Result 1479 states and 1638 transitions. [2018-01-29 22:55:51,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-29 22:55:51,981 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 177 [2018-01-29 22:55:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:51,986 INFO L225 Difference]: With dead ends: 1479 [2018-01-29 22:55:51,986 INFO L226 Difference]: Without dead ends: 1476 [2018-01-29 22:55:51,986 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-01-29 22:55:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2018-01-29 22:55:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 274. [2018-01-29 22:55:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-01-29 22:55:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 298 transitions. [2018-01-29 22:55:52,027 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 298 transitions. Word has length 177 [2018-01-29 22:55:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:52,028 INFO L432 AbstractCegarLoop]: Abstraction has 274 states and 298 transitions. [2018-01-29 22:55:52,028 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-29 22:55:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 298 transitions. [2018-01-29 22:55:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-01-29 22:55:52,032 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:52,033 INFO L350 BasicCegarLoop]: trace histogram [11, 11, 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] [2018-01-29 22:55:52,033 INFO L371 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash -732106455, now seen corresponding path program 15 times [2018-01-29 22:55:52,033 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:52,033 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:52,034 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:52,034 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:52,034 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:52,042 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2018-01-29 22:55:52,493 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:52,493 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:52,499 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:55:52,505 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,508 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,510 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,512 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,515 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,518 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,521 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,526 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,530 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,534 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:52,535 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:52,538 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2018-01-29 22:55:52,590 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:52,590 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-01-29 22:55:52,590 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-29 22:55:52,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-29 22:55:52,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-01-29 22:55:52,591 INFO L87 Difference]: Start difference. First operand 274 states and 298 transitions. Second operand 21 states. [2018-01-29 22:55:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:53,050 INFO L93 Difference]: Finished difference Result 287 states and 313 transitions. [2018-01-29 22:55:53,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-29 22:55:53,050 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 193 [2018-01-29 22:55:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:53,052 INFO L225 Difference]: With dead ends: 287 [2018-01-29 22:55:53,052 INFO L226 Difference]: Without dead ends: 285 [2018-01-29 22:55:53,052 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2018-01-29 22:55:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-01-29 22:55:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2018-01-29 22:55:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-01-29 22:55:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 307 transitions. [2018-01-29 22:55:53,086 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 307 transitions. Word has length 193 [2018-01-29 22:55:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:53,087 INFO L432 AbstractCegarLoop]: Abstraction has 282 states and 307 transitions. [2018-01-29 22:55:53,087 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-29 22:55:53,087 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 307 transitions. [2018-01-29 22:55:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-01-29 22:55:53,088 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:53,088 INFO L350 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:53,088 INFO L371 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash -769960270, now seen corresponding path program 25 times [2018-01-29 22:55:53,088 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:53,089 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:53,089 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:53,089 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:53,089 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:53,098 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 0 proven. 2150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:53,539 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:53,540 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:53,544 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:53,562 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 0 proven. 2150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:53,652 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:53,653 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-01-29 22:55:53,653 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-29 22:55:53,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-29 22:55:53,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-01-29 22:55:53,654 INFO L87 Difference]: Start difference. First operand 282 states and 307 transitions. Second operand 28 states. [2018-01-29 22:55:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:55,203 INFO L93 Difference]: Finished difference Result 1702 states and 1888 transitions. [2018-01-29 22:55:55,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-29 22:55:55,204 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 184 [2018-01-29 22:55:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:55,208 INFO L225 Difference]: With dead ends: 1702 [2018-01-29 22:55:55,209 INFO L226 Difference]: Without dead ends: 1699 [2018-01-29 22:55:55,209 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-01-29 22:55:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2018-01-29 22:55:55,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 289. [2018-01-29 22:55:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-01-29 22:55:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 315 transitions. [2018-01-29 22:55:55,254 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 315 transitions. Word has length 184 [2018-01-29 22:55:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:55,255 INFO L432 AbstractCegarLoop]: Abstraction has 289 states and 315 transitions. [2018-01-29 22:55:55,255 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-29 22:55:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 315 transitions. [2018-01-29 22:55:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-01-29 22:55:55,256 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:55,257 INFO L350 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:55,257 INFO L371 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash -862177820, now seen corresponding path program 26 times [2018-01-29 22:55:55,257 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:55,257 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:55,258 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:55,258 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:55:55,258 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:55,267 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 0 proven. 2327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:55,786 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:55,822 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:55,827 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:55:55,831 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:55,844 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:55:55,845 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:55,848 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 0 proven. 2327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:55,915 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:55,915 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-01-29 22:55:55,916 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-29 22:55:55,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-29 22:55:55,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-01-29 22:55:55,916 INFO L87 Difference]: Start difference. First operand 289 states and 315 transitions. Second operand 29 states. [2018-01-29 22:55:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:57,658 INFO L93 Difference]: Finished difference Result 1797 states and 1994 transitions. [2018-01-29 22:55:57,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-29 22:55:57,659 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 191 [2018-01-29 22:55:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:57,664 INFO L225 Difference]: With dead ends: 1797 [2018-01-29 22:55:57,664 INFO L226 Difference]: Without dead ends: 1794 [2018-01-29 22:55:57,665 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-01-29 22:55:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2018-01-29 22:55:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 296. [2018-01-29 22:55:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-01-29 22:55:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 323 transitions. [2018-01-29 22:55:57,714 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 323 transitions. Word has length 191 [2018-01-29 22:55:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:57,714 INFO L432 AbstractCegarLoop]: Abstraction has 296 states and 323 transitions. [2018-01-29 22:55:57,714 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-29 22:55:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 323 transitions. [2018-01-29 22:55:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-01-29 22:55:57,715 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:57,715 INFO L350 BasicCegarLoop]: trace histogram [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] [2018-01-29 22:55:57,715 INFO L371 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1202609564, now seen corresponding path program 16 times [2018-01-29 22:55:57,716 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:57,716 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:57,716 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:57,717 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:57,717 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:57,724 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 325 proven. 410 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-01-29 22:55:58,166 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:58,166 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:58,173 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:55:58,192 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:58,195 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 390 proven. 345 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-01-29 22:55:58,284 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:58,284 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2018-01-29 22:55:58,284 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-29 22:55:58,285 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-29 22:55:58,285 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1011, Unknown=0, NotChecked=0, Total=1260 [2018-01-29 22:55:58,285 INFO L87 Difference]: Start difference. First operand 296 states and 323 transitions. Second operand 36 states. [2018-01-29 22:55:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:55:58,839 INFO L93 Difference]: Finished difference Result 394 states and 431 transitions. [2018-01-29 22:55:58,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-29 22:55:58,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 205 [2018-01-29 22:55:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:55:58,841 INFO L225 Difference]: With dead ends: 394 [2018-01-29 22:55:58,841 INFO L226 Difference]: Without dead ends: 296 [2018-01-29 22:55:58,842 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=2385, Unknown=0, NotChecked=0, Total=3080 [2018-01-29 22:55:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-01-29 22:55:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2018-01-29 22:55:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-01-29 22:55:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 322 transitions. [2018-01-29 22:55:58,884 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 322 transitions. Word has length 205 [2018-01-29 22:55:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:55:58,885 INFO L432 AbstractCegarLoop]: Abstraction has 296 states and 322 transitions. [2018-01-29 22:55:58,885 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-29 22:55:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 322 transitions. [2018-01-29 22:55:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-01-29 22:55:58,885 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:55:58,886 INFO L350 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:55:58,886 INFO L371 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:55:58,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1915566706, now seen corresponding path program 27 times [2018-01-29 22:55:58,886 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:55:58,886 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:55:58,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:58,886 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:55:58,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:55:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:55:58,892 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:55:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 2511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:59,402 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:55:59,402 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:55:59,407 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:55:59,411 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,412 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,413 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,414 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,415 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,416 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,417 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,418 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,419 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,421 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,423 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,424 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,427 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,429 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,431 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,434 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,437 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,440 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,443 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,447 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,452 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,456 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,461 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,466 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,472 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,479 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,486 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,494 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:55:59,495 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:55:59,498 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:55:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 2511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:55:59,620 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:55:59,620 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-01-29 22:55:59,621 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-29 22:55:59,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-29 22:55:59,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-01-29 22:55:59,621 INFO L87 Difference]: Start difference. First operand 296 states and 322 transitions. Second operand 30 states. [2018-01-29 22:56:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:01,551 INFO L93 Difference]: Finished difference Result 1804 states and 2001 transitions. [2018-01-29 22:56:01,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-29 22:56:01,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 198 [2018-01-29 22:56:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:01,556 INFO L225 Difference]: With dead ends: 1804 [2018-01-29 22:56:01,556 INFO L226 Difference]: Without dead ends: 1801 [2018-01-29 22:56:01,557 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-01-29 22:56:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2018-01-29 22:56:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 303. [2018-01-29 22:56:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-01-29 22:56:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 330 transitions. [2018-01-29 22:56:01,610 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 330 transitions. Word has length 198 [2018-01-29 22:56:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:01,610 INFO L432 AbstractCegarLoop]: Abstraction has 303 states and 330 transitions. [2018-01-29 22:56:01,610 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-29 22:56:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 330 transitions. [2018-01-29 22:56:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-01-29 22:56:01,612 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:01,612 INFO L350 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:01,612 INFO L371 AbstractCegarLoop]: === Iteration 47 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:01,612 INFO L82 PathProgramCache]: Analyzing trace with hash 293639794, now seen corresponding path program 17 times [2018-01-29 22:56:01,612 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:01,612 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:01,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:01,613 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:01,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:01,621 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 315 proven. 493 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-01-29 22:56:02,089 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:02,089 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:56:02,095 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:56:02,099 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,101 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,103 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,106 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,108 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,110 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,113 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,116 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,119 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,123 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,127 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,146 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:02,150 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:02,153 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2018-01-29 22:56:02,660 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:02,660 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 22] total 55 [2018-01-29 22:56:02,661 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-29 22:56:02,661 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-29 22:56:02,662 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2018-01-29 22:56:02,662 INFO L87 Difference]: Start difference. First operand 303 states and 330 transitions. Second operand 56 states. [2018-01-29 22:56:04,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:04,112 INFO L93 Difference]: Finished difference Result 408 states and 450 transitions. [2018-01-29 22:56:04,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-01-29 22:56:04,112 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 212 [2018-01-29 22:56:04,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:04,113 INFO L225 Difference]: With dead ends: 408 [2018-01-29 22:56:04,113 INFO L226 Difference]: Without dead ends: 314 [2018-01-29 22:56:04,115 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=835, Invalid=10721, Unknown=0, NotChecked=0, Total=11556 [2018-01-29 22:56:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-01-29 22:56:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 311. [2018-01-29 22:56:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-01-29 22:56:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 338 transitions. [2018-01-29 22:56:04,161 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 338 transitions. Word has length 212 [2018-01-29 22:56:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:04,161 INFO L432 AbstractCegarLoop]: Abstraction has 311 states and 338 transitions. [2018-01-29 22:56:04,161 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-29 22:56:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 338 transitions. [2018-01-29 22:56:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-01-29 22:56:04,162 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:04,162 INFO L350 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:04,162 INFO L371 AbstractCegarLoop]: === Iteration 48 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:04,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1156146652, now seen corresponding path program 28 times [2018-01-29 22:56:04,163 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:04,163 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:04,163 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:04,163 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:04,163 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:04,169 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 0 proven. 2702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:04,634 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:04,635 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:56:04,639 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:56:04,675 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:04,679 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 0 proven. 2702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:04,814 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:04,815 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-01-29 22:56:04,815 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-29 22:56:04,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-29 22:56:04,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-01-29 22:56:04,815 INFO L87 Difference]: Start difference. First operand 311 states and 338 transitions. Second operand 31 states. [2018-01-29 22:56:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:06,830 INFO L93 Difference]: Finished difference Result 1955 states and 2170 transitions. [2018-01-29 22:56:06,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-29 22:56:06,831 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 205 [2018-01-29 22:56:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:06,836 INFO L225 Difference]: With dead ends: 1955 [2018-01-29 22:56:06,836 INFO L226 Difference]: Without dead ends: 1952 [2018-01-29 22:56:06,837 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-01-29 22:56:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2018-01-29 22:56:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 318. [2018-01-29 22:56:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-01-29 22:56:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 346 transitions. [2018-01-29 22:56:06,896 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 346 transitions. Word has length 205 [2018-01-29 22:56:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:06,896 INFO L432 AbstractCegarLoop]: Abstraction has 318 states and 346 transitions. [2018-01-29 22:56:06,896 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-29 22:56:06,897 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 346 transitions. [2018-01-29 22:56:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-01-29 22:56:06,897 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:06,897 INFO L350 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:06,897 INFO L371 AbstractCegarLoop]: === Iteration 49 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:06,898 INFO L82 PathProgramCache]: Analyzing trace with hash 340102706, now seen corresponding path program 29 times [2018-01-29 22:56:06,898 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:06,898 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:06,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:06,898 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:06,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:06,904 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 2900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:07,436 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:07,436 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:56:07,441 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:56:07,444 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,445 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,446 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,447 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,448 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,449 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,450 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,452 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,453 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,455 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,457 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,459 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,461 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,464 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,467 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,470 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,473 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,478 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,482 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,487 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,492 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,498 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,505 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,512 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,521 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,530 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,552 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,565 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,579 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:07,580 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:07,583 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 2900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:07,659 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:07,659 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-01-29 22:56:07,659 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-29 22:56:07,659 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-29 22:56:07,659 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-01-29 22:56:07,660 INFO L87 Difference]: Start difference. First operand 318 states and 346 transitions. Second operand 32 states. [2018-01-29 22:56:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:09,929 INFO L93 Difference]: Finished difference Result 2058 states and 2285 transitions. [2018-01-29 22:56:09,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-29 22:56:09,929 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 212 [2018-01-29 22:56:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:09,937 INFO L225 Difference]: With dead ends: 2058 [2018-01-29 22:56:09,937 INFO L226 Difference]: Without dead ends: 2055 [2018-01-29 22:56:09,938 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-01-29 22:56:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2018-01-29 22:56:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 325. [2018-01-29 22:56:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-01-29 22:56:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 354 transitions. [2018-01-29 22:56:10,001 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 354 transitions. Word has length 212 [2018-01-29 22:56:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:10,001 INFO L432 AbstractCegarLoop]: Abstraction has 325 states and 354 transitions. [2018-01-29 22:56:10,001 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-29 22:56:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 354 transitions. [2018-01-29 22:56:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-01-29 22:56:10,002 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:10,002 INFO L350 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:10,002 INFO L371 AbstractCegarLoop]: === Iteration 50 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:10,002 INFO L82 PathProgramCache]: Analyzing trace with hash -127103388, now seen corresponding path program 30 times [2018-01-29 22:56:10,002 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:10,002 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:10,003 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:10,003 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:10,003 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:10,009 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:10,592 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:10,593 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:56:10,598 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:56:10,602 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,603 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,604 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,605 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,606 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,607 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,608 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,609 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,610 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,611 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,613 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,614 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,616 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,617 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,619 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,621 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,623 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,625 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,627 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,630 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,633 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,636 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,639 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,644 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,649 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,652 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,664 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,676 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,682 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,687 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:10,688 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:10,691 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:10,786 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:10,786 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-01-29 22:56:10,786 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-29 22:56:10,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-29 22:56:10,786 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-01-29 22:56:10,787 INFO L87 Difference]: Start difference. First operand 325 states and 354 transitions. Second operand 33 states. [2018-01-29 22:56:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:13,353 INFO L93 Difference]: Finished difference Result 2161 states and 2400 transitions. [2018-01-29 22:56:13,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-29 22:56:13,353 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 219 [2018-01-29 22:56:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:13,359 INFO L225 Difference]: With dead ends: 2161 [2018-01-29 22:56:13,359 INFO L226 Difference]: Without dead ends: 2158 [2018-01-29 22:56:13,360 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-01-29 22:56:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2018-01-29 22:56:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 332. [2018-01-29 22:56:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-01-29 22:56:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 362 transitions. [2018-01-29 22:56:13,427 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 362 transitions. Word has length 219 [2018-01-29 22:56:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:13,428 INFO L432 AbstractCegarLoop]: Abstraction has 332 states and 362 transitions. [2018-01-29 22:56:13,428 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-29 22:56:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 362 transitions. [2018-01-29 22:56:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-01-29 22:56:13,429 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:13,429 INFO L350 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:13,429 INFO L371 AbstractCegarLoop]: === Iteration 51 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:13,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1187047263, now seen corresponding path program 18 times [2018-01-29 22:56:13,429 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:13,429 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:13,430 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:13,430 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:13,430 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:13,438 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2018-01-29 22:56:13,820 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:13,820 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 22:56:13,829 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:56:13,835 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,836 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,838 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,839 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,842 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,844 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,846 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,849 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,852 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,855 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,861 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,865 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,873 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:13,875 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:13,878 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2018-01-29 22:56:13,955 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:13,955 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-01-29 22:56:13,956 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-29 22:56:13,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-29 22:56:13,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-01-29 22:56:13,956 INFO L87 Difference]: Start difference. First operand 332 states and 362 transitions. Second operand 25 states. [2018-01-29 22:56:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:14,610 INFO L93 Difference]: Finished difference Result 345 states and 377 transitions. [2018-01-29 22:56:14,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-29 22:56:14,610 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 231 [2018-01-29 22:56:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:14,612 INFO L225 Difference]: With dead ends: 345 [2018-01-29 22:56:14,612 INFO L226 Difference]: Without dead ends: 343 [2018-01-29 22:56:14,613 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2018-01-29 22:56:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-01-29 22:56:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2018-01-29 22:56:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-01-29 22:56:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 371 transitions. [2018-01-29 22:56:14,674 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 371 transitions. Word has length 231 [2018-01-29 22:56:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:14,674 INFO L432 AbstractCegarLoop]: Abstraction has 340 states and 371 transitions. [2018-01-29 22:56:14,675 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-29 22:56:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 371 transitions. [2018-01-29 22:56:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-01-29 22:56:14,676 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:14,676 INFO L350 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:14,676 INFO L371 AbstractCegarLoop]: === Iteration 52 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:14,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1268755982, now seen corresponding path program 31 times [2018-01-29 22:56:14,676 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:14,677 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:14,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:14,677 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:14,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:14,683 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 0 proven. 3317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:15,325 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:15,325 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:15,330 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:56:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:15,349 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 0 proven. 3317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:15,431 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:15,431 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-01-29 22:56:15,431 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-29 22:56:15,431 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-29 22:56:15,431 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-01-29 22:56:15,432 INFO L87 Difference]: Start difference. First operand 340 states and 371 transitions. Second operand 34 states. [2018-01-29 22:56:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:18,180 INFO L93 Difference]: Finished difference Result 2432 states and 2704 transitions. [2018-01-29 22:56:18,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-29 22:56:18,180 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 226 [2018-01-29 22:56:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:18,185 INFO L225 Difference]: With dead ends: 2432 [2018-01-29 22:56:18,185 INFO L226 Difference]: Without dead ends: 2429 [2018-01-29 22:56:18,186 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-01-29 22:56:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2018-01-29 22:56:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 347. [2018-01-29 22:56:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-01-29 22:56:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 379 transitions. [2018-01-29 22:56:18,261 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 379 transitions. Word has length 226 [2018-01-29 22:56:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:18,261 INFO L432 AbstractCegarLoop]: Abstraction has 347 states and 379 transitions. [2018-01-29 22:56:18,261 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-29 22:56:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 379 transitions. [2018-01-29 22:56:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-01-29 22:56:18,262 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:18,262 INFO L350 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:18,263 INFO L371 AbstractCegarLoop]: === Iteration 53 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash -434636902, now seen corresponding path program 19 times [2018-01-29 22:56:18,263 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:18,263 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:18,263 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:18,263 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:56:18,263 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:18,271 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 485 proven. 577 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-01-29 22:56:18,847 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:18,847 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:18,851 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:56:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:18,877 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 564 proven. 498 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-01-29 22:56:19,497 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:19,497 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 65 [2018-01-29 22:56:19,498 INFO L409 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-01-29 22:56:19,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-01-29 22:56:19,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3517, Unknown=0, NotChecked=0, Total=4160 [2018-01-29 22:56:19,498 INFO L87 Difference]: Start difference. First operand 347 states and 379 transitions. Second operand 65 states. [2018-01-29 22:56:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:20,219 INFO L93 Difference]: Finished difference Result 461 states and 505 transitions. [2018-01-29 22:56:20,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-29 22:56:20,219 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 243 [2018-01-29 22:56:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:20,220 INFO L225 Difference]: With dead ends: 461 [2018-01-29 22:56:20,220 INFO L226 Difference]: Without dead ends: 347 [2018-01-29 22:56:20,221 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1549, Invalid=6283, Unknown=0, NotChecked=0, Total=7832 [2018-01-29 22:56:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-01-29 22:56:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-01-29 22:56:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-01-29 22:56:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 378 transitions. [2018-01-29 22:56:20,287 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 378 transitions. Word has length 243 [2018-01-29 22:56:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:20,288 INFO L432 AbstractCegarLoop]: Abstraction has 347 states and 378 transitions. [2018-01-29 22:56:20,288 INFO L433 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-01-29 22:56:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 378 transitions. [2018-01-29 22:56:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-01-29 22:56:20,288 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:20,289 INFO L350 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:20,289 INFO L371 AbstractCegarLoop]: === Iteration 54 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1428296356, now seen corresponding path program 32 times [2018-01-29 22:56:20,289 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:20,289 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:20,289 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:20,289 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:56:20,290 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:20,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 0 proven. 3536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:20,900 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:20,900 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:20,905 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:56:20,910 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:20,939 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:20,943 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:20,946 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 0 proven. 3536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:21,071 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:21,072 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-01-29 22:56:21,072 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-29 22:56:21,072 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-29 22:56:21,072 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-01-29 22:56:21,073 INFO L87 Difference]: Start difference. First operand 347 states and 378 transitions. Second operand 35 states. [2018-01-29 22:56:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:23,970 INFO L93 Difference]: Finished difference Result 2439 states and 2711 transitions. [2018-01-29 22:56:23,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-29 22:56:23,971 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 233 [2018-01-29 22:56:23,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:23,976 INFO L225 Difference]: With dead ends: 2439 [2018-01-29 22:56:23,977 INFO L226 Difference]: Without dead ends: 2436 [2018-01-29 22:56:23,978 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-01-29 22:56:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2018-01-29 22:56:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 354. [2018-01-29 22:56:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-01-29 22:56:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 386 transitions. [2018-01-29 22:56:24,073 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 386 transitions. Word has length 233 [2018-01-29 22:56:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:24,073 INFO L432 AbstractCegarLoop]: Abstraction has 354 states and 386 transitions. [2018-01-29 22:56:24,073 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-29 22:56:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 386 transitions. [2018-01-29 22:56:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-01-29 22:56:24,074 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:24,074 INFO L350 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:24,074 INFO L371 AbstractCegarLoop]: === Iteration 55 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash -696422104, now seen corresponding path program 20 times [2018-01-29 22:56:24,075 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:24,075 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:24,075 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:24,075 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:24,075 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:24,083 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 473 proven. 676 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-01-29 22:56:24,767 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:24,767 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:24,776 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:56:24,781 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:24,796 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:24,800 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:24,802 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 552 proven. 597 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-01-29 22:56:24,920 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:24,920 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2018-01-29 22:56:24,921 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-29 22:56:24,921 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-29 22:56:24,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1543, Unknown=0, NotChecked=0, Total=1892 [2018-01-29 22:56:24,921 INFO L87 Difference]: Start difference. First operand 354 states and 386 transitions. Second operand 44 states. [2018-01-29 22:56:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:25,635 INFO L93 Difference]: Finished difference Result 461 states and 506 transitions. [2018-01-29 22:56:25,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-29 22:56:25,636 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 250 [2018-01-29 22:56:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:25,636 INFO L225 Difference]: With dead ends: 461 [2018-01-29 22:56:25,637 INFO L226 Difference]: Without dead ends: 354 [2018-01-29 22:56:25,637 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1048, Invalid=3782, Unknown=0, NotChecked=0, Total=4830 [2018-01-29 22:56:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2018-01-29 22:56:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2018-01-29 22:56:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-01-29 22:56:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 385 transitions. [2018-01-29 22:56:25,716 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 385 transitions. Word has length 250 [2018-01-29 22:56:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:25,717 INFO L432 AbstractCegarLoop]: Abstraction has 354 states and 385 transitions. [2018-01-29 22:56:25,717 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-29 22:56:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 385 transitions. [2018-01-29 22:56:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-01-29 22:56:25,718 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:25,718 INFO L350 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:25,718 INFO L371 AbstractCegarLoop]: === Iteration 56 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1518762574, now seen corresponding path program 33 times [2018-01-29 22:56:25,718 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:25,718 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:25,719 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:25,719 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:25,719 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:25,727 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 0 proven. 3762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:26,365 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:26,365 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:26,370 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:56:26,374 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,375 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,376 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,377 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,378 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,379 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,380 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,381 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,382 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,384 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,386 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,387 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,390 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,392 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,394 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,397 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,400 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,403 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,407 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,411 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,416 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,420 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,425 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,431 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,437 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,444 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,452 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,461 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,469 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,479 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,489 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,501 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,514 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,528 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:26,529 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:26,532 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 0 proven. 3762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:26,621 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:26,622 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-01-29 22:56:26,622 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-29 22:56:26,622 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-29 22:56:26,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-01-29 22:56:26,622 INFO L87 Difference]: Start difference. First operand 354 states and 385 transitions. Second operand 36 states. [2018-01-29 22:56:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:29,710 INFO L93 Difference]: Finished difference Result 2446 states and 2718 transitions. [2018-01-29 22:56:29,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-29 22:56:29,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 240 [2018-01-29 22:56:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:29,715 INFO L225 Difference]: With dead ends: 2446 [2018-01-29 22:56:29,715 INFO L226 Difference]: Without dead ends: 2443 [2018-01-29 22:56:29,716 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-01-29 22:56:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2018-01-29 22:56:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 361. [2018-01-29 22:56:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-01-29 22:56:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 393 transitions. [2018-01-29 22:56:29,876 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 393 transitions. Word has length 240 [2018-01-29 22:56:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:29,876 INFO L432 AbstractCegarLoop]: Abstraction has 361 states and 393 transitions. [2018-01-29 22:56:29,876 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-29 22:56:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 393 transitions. [2018-01-29 22:56:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-01-29 22:56:29,878 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:29,878 INFO L350 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:29,878 INFO L371 AbstractCegarLoop]: === Iteration 57 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:29,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1483424806, now seen corresponding path program 21 times [2018-01-29 22:56:29,879 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:29,879 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:29,879 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:29,879 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:29,880 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:29,891 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2018-01-29 22:56:30,309 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:30,309 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:30,314 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:56:30,320 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,322 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,324 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,326 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,329 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,332 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,335 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,340 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,344 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,349 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,356 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,366 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,376 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:56:30,377 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:30,379 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2018-01-29 22:56:30,442 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:30,442 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-01-29 22:56:30,443 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-29 22:56:30,443 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-29 22:56:30,444 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-01-29 22:56:30,444 INFO L87 Difference]: Start difference. First operand 361 states and 393 transitions. Second operand 27 states. [2018-01-29 22:56:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:31,193 INFO L93 Difference]: Finished difference Result 374 states and 408 transitions. [2018-01-29 22:56:31,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-29 22:56:31,193 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 257 [2018-01-29 22:56:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:31,194 INFO L225 Difference]: With dead ends: 374 [2018-01-29 22:56:31,194 INFO L226 Difference]: Without dead ends: 372 [2018-01-29 22:56:31,194 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2018-01-29 22:56:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2018-01-29 22:56:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 369. [2018-01-29 22:56:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-01-29 22:56:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 402 transitions. [2018-01-29 22:56:31,277 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 402 transitions. Word has length 257 [2018-01-29 22:56:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:31,277 INFO L432 AbstractCegarLoop]: Abstraction has 369 states and 402 transitions. [2018-01-29 22:56:31,277 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-29 22:56:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 402 transitions. [2018-01-29 22:56:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-01-29 22:56:31,278 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:31,278 INFO L350 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:31,278 INFO L371 AbstractCegarLoop]: === Iteration 58 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1790650084, now seen corresponding path program 34 times [2018-01-29 22:56:31,278 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:31,278 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:31,279 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:31,279 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:31,279 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:31,285 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 0 proven. 3995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:31,956 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:31,956 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:31,961 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:56:32,013 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:32,016 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 0 proven. 3995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:32,139 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:32,139 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-01-29 22:56:32,139 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-29 22:56:32,140 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-29 22:56:32,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-01-29 22:56:32,140 INFO L87 Difference]: Start difference. First operand 369 states and 402 transitions. Second operand 37 states. [2018-01-29 22:56:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:35,648 INFO L93 Difference]: Finished difference Result 2733 states and 3040 transitions. [2018-01-29 22:56:35,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-29 22:56:35,649 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 247 [2018-01-29 22:56:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:35,654 INFO L225 Difference]: With dead ends: 2733 [2018-01-29 22:56:35,654 INFO L226 Difference]: Without dead ends: 2730 [2018-01-29 22:56:35,655 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-01-29 22:56:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2018-01-29 22:56:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 376. [2018-01-29 22:56:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-01-29 22:56:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 410 transitions. [2018-01-29 22:56:35,757 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 410 transitions. Word has length 247 [2018-01-29 22:56:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:35,758 INFO L432 AbstractCegarLoop]: Abstraction has 376 states and 410 transitions. [2018-01-29 22:56:35,758 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-29 22:56:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 410 transitions. [2018-01-29 22:56:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-01-29 22:56:35,759 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:35,759 INFO L350 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:35,759 INFO L371 AbstractCegarLoop]: === Iteration 59 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:35,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1368205682, now seen corresponding path program 35 times [2018-01-29 22:56:35,759 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:35,759 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:35,760 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:35,760 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:35,760 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:35,767 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 4235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:36,535 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:36,535 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:36,540 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:56:36,544 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,545 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,546 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,547 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,548 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,549 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,550 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,552 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,553 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,555 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,557 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,559 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,562 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,565 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,568 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,572 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,576 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,580 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,584 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,590 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,596 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,602 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,610 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,618 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,627 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,637 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,648 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,660 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,673 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,688 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,704 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,721 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,740 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,759 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,782 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,806 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:36,808 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:36,812 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 4235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:36,909 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:36,909 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-01-29 22:56:36,909 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-29 22:56:36,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-29 22:56:36,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-01-29 22:56:36,910 INFO L87 Difference]: Start difference. First operand 376 states and 410 transitions. Second operand 38 states. [2018-01-29 22:56:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:40,674 INFO L93 Difference]: Finished difference Result 2852 states and 3173 transitions. [2018-01-29 22:56:40,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-29 22:56:40,675 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 254 [2018-01-29 22:56:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:40,679 INFO L225 Difference]: With dead ends: 2852 [2018-01-29 22:56:40,679 INFO L226 Difference]: Without dead ends: 2849 [2018-01-29 22:56:40,680 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-01-29 22:56:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2018-01-29 22:56:40,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 383. [2018-01-29 22:56:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-01-29 22:56:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 418 transitions. [2018-01-29 22:56:40,834 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 418 transitions. Word has length 254 [2018-01-29 22:56:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:40,834 INFO L432 AbstractCegarLoop]: Abstraction has 383 states and 418 transitions. [2018-01-29 22:56:40,834 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-29 22:56:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 418 transitions. [2018-01-29 22:56:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-01-29 22:56:40,835 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:40,835 INFO L350 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:40,835 INFO L371 AbstractCegarLoop]: === Iteration 60 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1128141931, now seen corresponding path program 22 times [2018-01-29 22:56:40,835 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:40,835 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:40,836 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:40,836 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:40,836 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:40,844 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 564 proven. 778 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-01-29 22:56:41,587 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:41,588 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:41,592 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:56:41,629 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:41,632 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 663 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2018-01-29 22:56:42,216 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:42,216 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 28] total 70 [2018-01-29 22:56:42,216 INFO L409 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-01-29 22:56:42,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-01-29 22:56:42,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=4553, Unknown=0, NotChecked=0, Total=4970 [2018-01-29 22:56:42,217 INFO L87 Difference]: Start difference. First operand 383 states and 418 transitions. Second operand 71 states. [2018-01-29 22:56:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:44,429 INFO L93 Difference]: Finished difference Result 512 states and 565 transitions. [2018-01-29 22:56:44,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-01-29 22:56:44,429 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 269 [2018-01-29 22:56:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:44,430 INFO L225 Difference]: With dead ends: 512 [2018-01-29 22:56:44,430 INFO L226 Difference]: Without dead ends: 394 [2018-01-29 22:56:44,431 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5094 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1234, Invalid=17672, Unknown=0, NotChecked=0, Total=18906 [2018-01-29 22:56:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-01-29 22:56:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 391. [2018-01-29 22:56:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-01-29 22:56:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 426 transitions. [2018-01-29 22:56:44,533 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 426 transitions. Word has length 269 [2018-01-29 22:56:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:44,533 INFO L432 AbstractCegarLoop]: Abstraction has 391 states and 426 transitions. [2018-01-29 22:56:44,533 INFO L433 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-01-29 22:56:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 426 transitions. [2018-01-29 22:56:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-01-29 22:56:44,534 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:44,534 INFO L350 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:44,534 INFO L371 AbstractCegarLoop]: === Iteration 61 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:44,534 INFO L82 PathProgramCache]: Analyzing trace with hash -608449756, now seen corresponding path program 36 times [2018-01-29 22:56:44,534 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:44,534 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:44,535 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:44,535 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:44,535 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:44,543 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 0 proven. 4482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:45,318 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:45,318 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:45,323 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:56:45,328 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,328 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,329 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,330 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,331 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,332 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,333 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,334 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,335 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,336 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,338 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,339 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,341 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,342 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,344 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,346 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,348 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,350 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,352 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,355 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,357 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,360 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,363 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,367 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,370 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,374 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,378 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,382 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,386 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,391 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,396 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,402 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,408 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,414 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,423 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,431 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,441 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:56:45,443 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:45,446 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 0 proven. 4482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:45,547 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:45,547 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-01-29 22:56:45,547 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-29 22:56:45,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-29 22:56:45,548 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-01-29 22:56:45,548 INFO L87 Difference]: Start difference. First operand 391 states and 426 transitions. Second operand 39 states. [2018-01-29 22:56:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:49,530 INFO L93 Difference]: Finished difference Result 3043 states and 3387 transitions. [2018-01-29 22:56:49,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-29 22:56:49,531 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 261 [2018-01-29 22:56:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:49,534 INFO L225 Difference]: With dead ends: 3043 [2018-01-29 22:56:49,534 INFO L226 Difference]: Without dead ends: 3040 [2018-01-29 22:56:49,535 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-01-29 22:56:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2018-01-29 22:56:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 398. [2018-01-29 22:56:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2018-01-29 22:56:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 434 transitions. [2018-01-29 22:56:49,647 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 434 transitions. Word has length 261 [2018-01-29 22:56:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:49,648 INFO L432 AbstractCegarLoop]: Abstraction has 398 states and 434 transitions. [2018-01-29 22:56:49,648 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-29 22:56:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 434 transitions. [2018-01-29 22:56:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-01-29 22:56:49,649 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:49,649 INFO L350 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:49,649 INFO L371 AbstractCegarLoop]: === Iteration 62 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash -107528910, now seen corresponding path program 37 times [2018-01-29 22:56:49,649 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:49,649 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:49,650 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:49,650 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:49,650 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:49,657 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 0 proven. 4736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:50,460 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:50,490 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:50,495 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:56:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:50,519 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 0 proven. 4736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:56:50,625 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:50,625 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-01-29 22:56:50,625 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-29 22:56:50,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-29 22:56:50,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-01-29 22:56:50,626 INFO L87 Difference]: Start difference. First operand 398 states and 434 transitions. Second operand 40 states. [2018-01-29 22:56:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:54,971 INFO L93 Difference]: Finished difference Result 3170 states and 3529 transitions. [2018-01-29 22:56:54,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-29 22:56:54,972 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 268 [2018-01-29 22:56:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:54,976 INFO L225 Difference]: With dead ends: 3170 [2018-01-29 22:56:54,976 INFO L226 Difference]: Without dead ends: 3167 [2018-01-29 22:56:54,977 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-01-29 22:56:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2018-01-29 22:56:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 405. [2018-01-29 22:56:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2018-01-29 22:56:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 442 transitions. [2018-01-29 22:56:55,123 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 442 transitions. Word has length 268 [2018-01-29 22:56:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:55,123 INFO L432 AbstractCegarLoop]: Abstraction has 405 states and 442 transitions. [2018-01-29 22:56:55,123 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-29 22:56:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 442 transitions. [2018-01-29 22:56:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-01-29 22:56:55,124 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:55,125 INFO L350 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:55,125 INFO L371 AbstractCegarLoop]: === Iteration 63 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash 778189278, now seen corresponding path program 23 times [2018-01-29 22:56:55,125 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:55,125 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:55,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:55,126 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:56:55,126 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:55,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:56:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 663 proven. 887 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2018-01-29 22:56:55,973 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:56:55,973 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:56:55,978 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-29 22:56:55,983 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:55,985 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:55,987 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:55,989 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:55,991 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:55,994 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:55,996 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:55,999 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,002 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,005 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,009 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,013 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,018 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,023 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,028 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,036 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:56:56,038 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:56:56,041 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:56:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 1144 trivial. 0 not checked. [2018-01-29 22:56:56,717 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:56:56,718 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 30] total 75 [2018-01-29 22:56:56,718 INFO L409 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-01-29 22:56:56,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-01-29 22:56:56,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=5231, Unknown=0, NotChecked=0, Total=5700 [2018-01-29 22:56:56,719 INFO L87 Difference]: Start difference. First operand 405 states and 442 transitions. Second operand 76 states. [2018-01-29 22:56:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:56:59,148 INFO L93 Difference]: Finished difference Result 542 states and 598 transitions. [2018-01-29 22:56:59,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-01-29 22:56:59,148 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 288 [2018-01-29 22:56:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:56:59,149 INFO L225 Difference]: With dead ends: 542 [2018-01-29 22:56:59,149 INFO L226 Difference]: Without dead ends: 416 [2018-01-29 22:56:59,150 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1383, Invalid=20373, Unknown=0, NotChecked=0, Total=21756 [2018-01-29 22:56:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2018-01-29 22:56:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 413. [2018-01-29 22:56:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2018-01-29 22:56:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 450 transitions. [2018-01-29 22:56:59,259 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 450 transitions. Word has length 288 [2018-01-29 22:56:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:56:59,259 INFO L432 AbstractCegarLoop]: Abstraction has 413 states and 450 transitions. [2018-01-29 22:56:59,259 INFO L433 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-01-29 22:56:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 450 transitions. [2018-01-29 22:56:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-01-29 22:56:59,260 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:56:59,260 INFO L350 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:56:59,260 INFO L371 AbstractCegarLoop]: === Iteration 64 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:56:59,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1817706652, now seen corresponding path program 38 times [2018-01-29 22:56:59,260 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:56:59,260 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:56:59,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:59,261 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:56:59,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:56:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:56:59,268 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:57:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 0 proven. 4997 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:57:00,095 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:57:00,095 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:57:00,100 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-29 22:57:00,104 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:57:00,119 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-29 22:57:00,121 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:57:00,124 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:57:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 0 proven. 4997 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:57:00,231 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:57:00,232 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-01-29 22:57:00,232 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-29 22:57:00,232 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-29 22:57:00,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-01-29 22:57:00,233 INFO L87 Difference]: Start difference. First operand 413 states and 450 transitions. Second operand 41 states. [2018-01-29 22:57:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:57:04,912 INFO L93 Difference]: Finished difference Result 3369 states and 3752 transitions. [2018-01-29 22:57:04,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-29 22:57:04,912 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 275 [2018-01-29 22:57:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:57:04,917 INFO L225 Difference]: With dead ends: 3369 [2018-01-29 22:57:04,917 INFO L226 Difference]: Without dead ends: 3366 [2018-01-29 22:57:04,919 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-01-29 22:57:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2018-01-29 22:57:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 420. [2018-01-29 22:57:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2018-01-29 22:57:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 458 transitions. [2018-01-29 22:57:05,063 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 458 transitions. Word has length 275 [2018-01-29 22:57:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:57:05,063 INFO L432 AbstractCegarLoop]: Abstraction has 420 states and 458 transitions. [2018-01-29 22:57:05,063 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-29 22:57:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 458 transitions. [2018-01-29 22:57:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-01-29 22:57:05,064 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:57:05,065 INFO L350 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:57:05,065 INFO L371 AbstractCegarLoop]: === Iteration 65 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:57:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1972617458, now seen corresponding path program 39 times [2018-01-29 22:57:05,065 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:57:05,065 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:57:05,065 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:57:05,065 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:57:05,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:57:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:57:05,074 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:57:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 0 proven. 5265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:57:05,962 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:57:05,962 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:57:05,969 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-29 22:57:05,976 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,978 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,979 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,979 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,980 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,981 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,982 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,983 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,985 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,986 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,988 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,990 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,992 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,994 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,997 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:05,999 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,002 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,005 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,009 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,013 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,017 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,022 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,027 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,032 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,039 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,045 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,053 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,061 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,070 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,080 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,090 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,102 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,115 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,129 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,144 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,158 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,174 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,191 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,210 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,231 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-29 22:57:06,233 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:57:06,237 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:57:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 0 proven. 5265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:57:06,358 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:57:06,358 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-01-29 22:57:06,358 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-29 22:57:06,358 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-29 22:57:06,359 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-01-29 22:57:06,359 INFO L87 Difference]: Start difference. First operand 420 states and 458 transitions. Second operand 42 states. [2018-01-29 22:57:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:57:11,382 INFO L93 Difference]: Finished difference Result 3504 states and 3903 transitions. [2018-01-29 22:57:11,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-29 22:57:11,383 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 282 [2018-01-29 22:57:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:57:11,387 INFO L225 Difference]: With dead ends: 3504 [2018-01-29 22:57:11,387 INFO L226 Difference]: Without dead ends: 3501 [2018-01-29 22:57:11,388 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-01-29 22:57:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2018-01-29 22:57:11,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 427. [2018-01-29 22:57:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-01-29 22:57:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 466 transitions. [2018-01-29 22:57:11,525 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 466 transitions. Word has length 282 [2018-01-29 22:57:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:57:11,525 INFO L432 AbstractCegarLoop]: Abstraction has 427 states and 466 transitions. [2018-01-29 22:57:11,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-29 22:57:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 466 transitions. [2018-01-29 22:57:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-01-29 22:57:11,526 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:57:11,527 INFO L350 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:57:11,527 INFO L371 AbstractCegarLoop]: === Iteration 66 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:57:11,527 INFO L82 PathProgramCache]: Analyzing trace with hash 117687204, now seen corresponding path program 40 times [2018-01-29 22:57:11,527 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:57:11,527 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:57:11,527 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:57:11,528 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:57:11,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:57:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:57:11,534 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:57:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5540 backedges. 0 proven. 5540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:57:12,447 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:57:12,447 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:57:12,452 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-29 22:57:12,523 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:57:12,527 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-29 22:57:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5540 backedges. 0 proven. 5540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:57:12,642 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-29 22:57:12,642 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-01-29 22:57:12,642 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-29 22:57:12,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-29 22:57:12,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-01-29 22:57:12,643 INFO L87 Difference]: Start difference. First operand 427 states and 466 transitions. Second operand 43 states. [2018-01-29 22:57:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:57:18,111 INFO L93 Difference]: Finished difference Result 3639 states and 4054 transitions. [2018-01-29 22:57:18,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-29 22:57:18,111 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 289 [2018-01-29 22:57:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:57:18,114 INFO L225 Difference]: With dead ends: 3639 [2018-01-29 22:57:18,114 INFO L226 Difference]: Without dead ends: 3636 [2018-01-29 22:57:18,115 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-01-29 22:57:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2018-01-29 22:57:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 434. [2018-01-29 22:57:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-01-29 22:57:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 474 transitions. [2018-01-29 22:57:18,271 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 474 transitions. Word has length 289 [2018-01-29 22:57:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:57:18,272 INFO L432 AbstractCegarLoop]: Abstraction has 434 states and 474 transitions. [2018-01-29 22:57:18,272 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-29 22:57:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 474 transitions. [2018-01-29 22:57:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-01-29 22:57:18,273 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:57:18,273 INFO L350 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:57:18,273 INFO L371 AbstractCegarLoop]: === Iteration 67 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-29 22:57:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash 435813835, now seen corresponding path program 24 times [2018-01-29 22:57:18,273 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:57:18,273 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:57:18,274 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:57:18,274 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-29 22:57:18,274 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:57:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:57:18,282 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:57:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 770 proven. 1003 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-01-29 22:57:19,242 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-29 22:57:19,242 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-29 22:57:19,246 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-29 22:57:19,252 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,253 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,255 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,257 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,259 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,261 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,263 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,266 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,269 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,273 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,277 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,281 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,286 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,291 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,296 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,302 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,308 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-29 22:57:19,310 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-29 22:57:19,314 INFO L270 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-01-29 22:57:20,057 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-29 22:57:20,057 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-29 22:57:20,061 WARN L185 ceAbstractionStarter]: Timeout [2018-01-29 22:57:20,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.01 10:57:20 BoogieIcfgContainer [2018-01-29 22:57:20,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-29 22:57:20,062 INFO L168 Benchmark]: Toolchain (without parser) took 121732.63 ms. Allocated memory was 308.3 MB in the beginning and 916.5 MB in the end (delta: 608.2 MB). Free memory was 269.3 MB in the beginning and 640.4 MB in the end (delta: -371.0 MB). Peak memory consumption was 237.1 MB. Max. memory is 5.3 GB. [2018-01-29 22:57:20,063 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 308.3 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-29 22:57:20,063 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.96 ms. Allocated memory is still 308.3 MB. Free memory was 268.3 MB in the beginning and 261.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 5.3 GB. [2018-01-29 22:57:20,063 INFO L168 Benchmark]: Boogie Preprocessor took 24.77 ms. Allocated memory is still 308.3 MB. Free memory was 261.1 MB in the beginning and 259.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-29 22:57:20,063 INFO L168 Benchmark]: RCFGBuilder took 172.12 ms. Allocated memory is still 308.3 MB. Free memory was 259.1 MB in the beginning and 246.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 5.3 GB. [2018-01-29 22:57:20,063 INFO L168 Benchmark]: TraceAbstraction took 121365.47 ms. Allocated memory was 308.3 MB in the beginning and 916.5 MB in the end (delta: 608.2 MB). Free memory was 246.5 MB in the beginning and 640.4 MB in the end (delta: -393.9 MB). Peak memory consumption was 214.3 MB. Max. memory is 5.3 GB. [2018-01-29 22:57:20,065 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 308.3 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 162.96 ms. Allocated memory is still 308.3 MB. Free memory was 268.3 MB in the beginning and 261.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 24.77 ms. Allocated memory is still 308.3 MB. Free memory was 261.1 MB in the beginning and 259.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 172.12 ms. Allocated memory is still 308.3 MB. Free memory was 259.1 MB in the beginning and 246.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 5.3 GB. * TraceAbstraction took 121365.47 ms. Allocated memory was 308.3 MB in the beginning and 916.5 MB in the end (delta: 608.2 MB). Free memory was 246.5 MB in the beginning and 640.4 MB in the end (delta: -393.9 MB). Peak memory consumption was 214.3 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 7). Cancelled while BasicCegarLoop was analyzing trace of length 308 with TraceHistMax 17, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 74 known predicates. - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was analyzing trace of length 308 with TraceHistMax 17, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 74 known predicates. - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was analyzing trace of length 308 with TraceHistMax 17, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 74 known predicates. - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was analyzing trace of length 308 with TraceHistMax 17, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 74 known predicates. - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was analyzing trace of length 308 with TraceHistMax 17, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 74 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 5 error locations. TIMEOUT Result, 121.3s OverallTime, 67 OverallIterations, 41 TraceHistogramMax, 79.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12015 SDtfs, 8095 SDslu, 280132 SDs, 0 SdLazy, 135816 SolverSat, 899 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11633 GetRequests, 9520 SyntacticMatches, 63 SemanticMatches, 2050 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22285 ImplicationChecksByTransitivity, 27.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=434occurred in iteration=66, 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: 3.0s AutomataMinimizationTime, 66 MinimizatonAttempts, 46350 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 30.0s InterpolantComputationTime, 19556 NumberOfCodeBlocks, 19520 NumberOfCodeBlocksAsserted, 634 NumberOfCheckSat, 19426 ConstructedInterpolants, 0 QuantifiedInterpolants, 20846016 SizeOfPredicates, 351 NumberOfNonLiveVariables, 12229 ConjunctsInSsa, 2436 ConjunctsInUnsatCore, 130 InterpolantComputations, 3 PerfectInterpolantSequences, 17911/183288 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_SS.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-29_22-57-20-070.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_SS.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-29_22-57-20-070.csv Completed graceful shutdown