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/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memsetNonZero3_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:40:05,470 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:40:05,473 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:40:05,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:40:05,487 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:40:05,488 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:40:05,488 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:40:05,490 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:40:05,492 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:40:05,493 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:40:05,493 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:40:05,494 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:40:05,495 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:40:05,496 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:40:05,497 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:40:05,499 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:40:05,501 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:40:05,503 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:40:05,505 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:40:05,506 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:40:05,508 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 14:40:05,515 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:40:05,516 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:40:05,516 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:40:05,527 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:40:05,527 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:40:05,528 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:40:05,528 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:40:05,528 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:40:05,529 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:40:05,529 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:40:05,530 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:40:05,530 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:40:05,530 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:40:05,530 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:40:05,530 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:40:05,530 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:40:05,531 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:40:05,531 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:40:05,531 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:40:05,531 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:40:05,531 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:40:05,531 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:40:05,532 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:40:05,532 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:40:05,532 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:40:05,532 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:40:05,532 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:40:05,533 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:40:05,533 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:40:05,533 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:40:05,533 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:40:05,533 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:40:05,534 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:40:05,534 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:40:05,534 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:40:05,534 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:40:05,534 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:40:05,534 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:40:05,535 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:40:05,536 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:40:05,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:40:05,584 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:40:05,588 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:40:05,590 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:40:05,590 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:40:05,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memsetNonZero3_false-valid-deref-write.c [2018-01-23 14:40:05,744 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:40:05,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:40:05,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:40:05,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:40:05,761 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:40:05,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4909eab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05, skipping insertion in model container [2018-01-23 14:40:05,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,778 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:40:05,793 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:40:05,900 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:40:05,914 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:40:05,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05 WrapperNode [2018-01-23 14:40:05,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:40:05,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:40:05,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:40:05,920 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:40:05,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (1/1) ... [2018-01-23 14:40:05,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:40:05,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:40:05,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:40:05,948 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:40:05,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (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 [2018-01-23 14:40:06,003 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:40:06,004 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:40:06,004 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:40:06,004 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:40:06,004 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:40:06,004 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:40:06,005 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-23 14:40:06,005 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-23 14:40:06,005 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-23 14:40:06,005 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:40:06,005 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:40:06,005 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:40:06,138 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:40:06,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:40:06 BoogieIcfgContainer [2018-01-23 14:40:06,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:40:06,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:40:06,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:40:06,142 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:40:06,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:40:05" (1/3) ... [2018-01-23 14:40:06,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fc6744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:40:06, skipping insertion in model container [2018-01-23 14:40:06,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:40:05" (2/3) ... [2018-01-23 14:40:06,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fc6744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:40:06, skipping insertion in model container [2018-01-23 14:40:06,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:40:06" (3/3) ... [2018-01-23 14:40:06,150 INFO L105 eAbstractionObserver]: Analyzing ICFG memsetNonZero3_false-valid-deref-write.c [2018-01-23 14:40:06,159 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:40:06,167 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-23 14:40:06,214 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:40:06,214 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:40:06,214 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:40:06,215 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:40:06,215 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:40:06,215 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:40:06,215 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:40:06,215 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:40:06,216 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:40:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-23 14:40:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:40:06,244 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:06,245 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:40:06,245 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:40:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash 51896, now seen corresponding path program 1 times [2018-01-23 14:40:06,253 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:06,253 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:06,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:06,298 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:06,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:40:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:40:06,356 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:40:06,362 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:40:06,368 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:40:06,368 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:40:06,368 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:40:06,368 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:40:06,368 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:40:06,369 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:40:06,369 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:40:06,369 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:40:06,369 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:40:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-23 14:40:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-23 14:40:06,371 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:06,371 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:06,371 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash 126067280, now seen corresponding path program 1 times [2018-01-23 14:40:06,372 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:06,372 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:06,373 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:06,374 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:06,374 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:06,406 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:06,479 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:40:06,479 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:40:06,480 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:40:06,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:40:06,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:40:06,494 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2018-01-23 14:40:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:06,550 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-23 14:40:06,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:40:06,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-01-23 14:40:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:06,561 INFO L225 Difference]: With dead ends: 34 [2018-01-23 14:40:06,562 INFO L226 Difference]: Without dead ends: 20 [2018-01-23 14:40:06,565 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:40:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-23 14:40:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-23 14:40:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-23 14:40:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-23 14:40:06,661 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-23 14:40:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:06,662 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-23 14:40:06,662 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:40:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-23 14:40:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:40:06,663 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:06,663 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:06,663 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:06,663 INFO L82 PathProgramCache]: Analyzing trace with hash 763300235, now seen corresponding path program 1 times [2018-01-23 14:40:06,663 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:06,663 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:06,664 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:06,665 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:06,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:06,681 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:06,737 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:06,738 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 [2018-01-23 14:40:06,750 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:06,780 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:06,831 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:06,831 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-23 14:40:06,832 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-23 14:40:06,832 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-23 14:40:06,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:40:06,832 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2018-01-23 14:40:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:06,873 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-01-23 14:40:06,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:40:06,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-01-23 14:40:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:06,875 INFO L225 Difference]: With dead ends: 30 [2018-01-23 14:40:06,875 INFO L226 Difference]: Without dead ends: 21 [2018-01-23 14:40:06,876 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:40:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-01-23 14:40:06,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-01-23 14:40:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-01-23 14:40:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-01-23 14:40:06,881 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-01-23 14:40:06,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:06,881 INFO L432 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-01-23 14:40:06,881 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-23 14:40:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-01-23 14:40:06,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-23 14:40:06,882 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:06,883 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:06,883 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:06,883 INFO L82 PathProgramCache]: Analyzing trace with hash -957314640, now seen corresponding path program 2 times [2018-01-23 14:40:06,883 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:06,883 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:06,884 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:06,885 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:06,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:06,901 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:06,998 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:06,998 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 [2018-01-23 14:40:07,019 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:07,038 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:07,043 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:07,047 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:07,050 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:07,112 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:07,113 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-01-23 14:40:07,113 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-23 14:40:07,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-23 14:40:07,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:40:07,113 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2018-01-23 14:40:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:07,147 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-01-23 14:40:07,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:40:07,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-01-23 14:40:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:07,148 INFO L225 Difference]: With dead ends: 31 [2018-01-23 14:40:07,149 INFO L226 Difference]: Without dead ends: 22 [2018-01-23 14:40:07,149 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:40:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-23 14:40:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-23 14:40:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-23 14:40:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-01-23 14:40:07,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-01-23 14:40:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:07,153 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-01-23 14:40:07,153 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-23 14:40:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-01-23 14:40:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-23 14:40:07,154 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:07,154 INFO L322 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:07,154 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1538199083, now seen corresponding path program 3 times [2018-01-23 14:40:07,154 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:07,155 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:07,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:07,155 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:07,156 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:07,169 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:07,234 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:07,234 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 [2018-01-23 14:40:07,241 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:07,253 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:07,255 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:07,256 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:07,256 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:07,258 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:07,288 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:07,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-23 14:40:07,289 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:40:07,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:40:07,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:40:07,290 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-01-23 14:40:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:07,416 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-01-23 14:40:07,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:40:07,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-01-23 14:40:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:07,418 INFO L225 Difference]: With dead ends: 32 [2018-01-23 14:40:07,418 INFO L226 Difference]: Without dead ends: 23 [2018-01-23 14:40:07,418 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:40:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-23 14:40:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-23 14:40:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-23 14:40:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-23 14:40:07,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-01-23 14:40:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:07,423 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-23 14:40:07,423 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:40:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-23 14:40:07,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-23 14:40:07,424 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:07,425 INFO L322 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:07,425 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:07,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1589713168, now seen corresponding path program 4 times [2018-01-23 14:40:07,425 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:07,425 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:07,426 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:07,426 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:07,427 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:07,440 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:07,692 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:07,692 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 [2018-01-23 14:40:07,705 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:07,719 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:07,721 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:07,753 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:07,753 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-01-23 14:40:07,753 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-23 14:40:07,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-23 14:40:07,754 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:40:07,754 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-01-23 14:40:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:07,776 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:40:07,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:40:07,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-23 14:40:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:07,777 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:40:07,778 INFO L226 Difference]: Without dead ends: 24 [2018-01-23 14:40:07,778 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:40:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-23 14:40:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-23 14:40:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-23 14:40:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-01-23 14:40:07,782 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-01-23 14:40:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:07,783 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-01-23 14:40:07,783 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-23 14:40:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-01-23 14:40:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-23 14:40:07,784 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:07,784 INFO L322 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:07,784 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1108317493, now seen corresponding path program 5 times [2018-01-23 14:40:07,785 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:07,785 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:07,787 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:07,787 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:07,787 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:07,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:07,888 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:07,888 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 [2018-01-23 14:40:07,908 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:07,914 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:07,916 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:07,919 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:07,924 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:07,928 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:07,930 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:07,963 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:07,964 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-23 14:40:07,964 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:40:07,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:40:07,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:40:07,964 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 10 states. [2018-01-23 14:40:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:08,024 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-23 14:40:08,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:40:08,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-01-23 14:40:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:08,025 INFO L225 Difference]: With dead ends: 34 [2018-01-23 14:40:08,025 INFO L226 Difference]: Without dead ends: 25 [2018-01-23 14:40:08,026 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:40:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-23 14:40:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-23 14:40:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-23 14:40:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-01-23 14:40:08,030 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-01-23 14:40:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:08,030 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-01-23 14:40:08,030 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:40:08,031 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-01-23 14:40:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-23 14:40:08,031 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:08,031 INFO L322 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:08,032 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1152077936, now seen corresponding path program 6 times [2018-01-23 14:40:08,033 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:08,033 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:08,034 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:08,034 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:08,034 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:08,045 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:08,156 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:08,156 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 [2018-01-23 14:40:08,163 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:08,175 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:08,177 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:08,179 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:08,181 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:08,181 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:08,184 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:08,221 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:08,221 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-23 14:40:08,222 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-23 14:40:08,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-23 14:40:08,222 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:40:08,222 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 11 states. [2018-01-23 14:40:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:08,246 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-01-23 14:40:08,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:40:08,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-01-23 14:40:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:08,247 INFO L225 Difference]: With dead ends: 35 [2018-01-23 14:40:08,247 INFO L226 Difference]: Without dead ends: 26 [2018-01-23 14:40:08,248 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:40:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-23 14:40:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-23 14:40:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-23 14:40:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-01-23 14:40:08,250 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-01-23 14:40:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:08,251 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-01-23 14:40:08,251 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-23 14:40:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-01-23 14:40:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-23 14:40:08,251 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:08,251 INFO L322 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:08,251 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1790107797, now seen corresponding path program 7 times [2018-01-23 14:40:08,252 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:08,252 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:08,252 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:08,253 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:08,253 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:08,263 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:08,348 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:08,348 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 [2018-01-23 14:40:08,359 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:08,380 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:08,429 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:08,429 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-23 14:40:08,430 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-23 14:40:08,430 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-23 14:40:08,430 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:40:08,430 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2018-01-23 14:40:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:08,458 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-01-23 14:40:08,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:40:08,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-01-23 14:40:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:08,460 INFO L225 Difference]: With dead ends: 36 [2018-01-23 14:40:08,460 INFO L226 Difference]: Without dead ends: 27 [2018-01-23 14:40:08,460 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:40:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-23 14:40:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-23 14:40:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-23 14:40:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-01-23 14:40:08,464 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-01-23 14:40:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:08,464 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-01-23 14:40:08,464 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-23 14:40:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-01-23 14:40:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-23 14:40:08,465 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:08,465 INFO L322 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:08,465 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:08,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1491414992, now seen corresponding path program 8 times [2018-01-23 14:40:08,466 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:08,466 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:08,466 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:08,467 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:08,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:08,476 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:08,641 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:08,641 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 [2018-01-23 14:40:08,650 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:08,661 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:08,666 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:08,668 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:08,670 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:08,725 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:08,726 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-01-23 14:40:08,726 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-23 14:40:08,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-23 14:40:08,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:40:08,727 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 13 states. [2018-01-23 14:40:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:08,782 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-01-23 14:40:08,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:40:08,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2018-01-23 14:40:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:08,783 INFO L225 Difference]: With dead ends: 37 [2018-01-23 14:40:08,784 INFO L226 Difference]: Without dead ends: 28 [2018-01-23 14:40:08,784 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:40:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-01-23 14:40:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-01-23 14:40:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-23 14:40:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-23 14:40:08,788 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-01-23 14:40:08,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:08,789 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-23 14:40:08,789 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-23 14:40:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-23 14:40:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-23 14:40:08,790 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:08,790 INFO L322 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:08,790 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:08,791 INFO L82 PathProgramCache]: Analyzing trace with hash 139406347, now seen corresponding path program 9 times [2018-01-23 14:40:08,791 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:08,791 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:08,792 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:08,792 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:08,792 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:08,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:09,035 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:09,035 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 [2018-01-23 14:40:09,046 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:09,057 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:09,063 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:09,064 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:09,065 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:09,067 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:09,069 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:09,077 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:09,080 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:09,134 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:09,135 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-01-23 14:40:09,135 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:40:09,135 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:40:09,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:40:09,135 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 14 states. [2018-01-23 14:40:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:09,202 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-23 14:40:09,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:40:09,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-01-23 14:40:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:09,205 INFO L225 Difference]: With dead ends: 38 [2018-01-23 14:40:09,205 INFO L226 Difference]: Without dead ends: 29 [2018-01-23 14:40:09,206 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:40:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-23 14:40:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-23 14:40:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-23 14:40:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-01-23 14:40:09,209 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-01-23 14:40:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:09,209 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-01-23 14:40:09,209 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:40:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-01-23 14:40:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:40:09,210 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:09,211 INFO L322 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:09,211 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1176811312, now seen corresponding path program 10 times [2018-01-23 14:40:09,211 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:09,211 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:09,212 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:09,212 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:09,212 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:09,222 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:09,365 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:09,365 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 [2018-01-23 14:40:09,371 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:09,383 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:09,385 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:09,416 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:09,417 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-01-23 14:40:09,417 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-23 14:40:09,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-23 14:40:09,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:40:09,417 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-01-23 14:40:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:09,454 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-01-23 14:40:09,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:40:09,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-01-23 14:40:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:09,455 INFO L225 Difference]: With dead ends: 39 [2018-01-23 14:40:09,455 INFO L226 Difference]: Without dead ends: 30 [2018-01-23 14:40:09,455 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:40:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-23 14:40:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-23 14:40:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-23 14:40:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-01-23 14:40:09,458 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-01-23 14:40:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:09,459 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-01-23 14:40:09,459 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-23 14:40:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-01-23 14:40:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-23 14:40:09,460 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:09,460 INFO L322 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:09,460 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1023373141, now seen corresponding path program 11 times [2018-01-23 14:40:09,461 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:09,461 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:09,462 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:09,462 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:09,462 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:09,471 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:09,632 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:09,632 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 [2018-01-23 14:40:09,637 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:09,641 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:09,643 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:09,644 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:09,645 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:09,646 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:09,647 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:09,652 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:09,654 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:09,656 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:09,688 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:09,688 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-01-23 14:40:09,689 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:40:09,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:40:09,689 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:40:09,689 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 16 states. [2018-01-23 14:40:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:09,715 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-01-23 14:40:09,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:40:09,716 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-01-23 14:40:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:09,717 INFO L225 Difference]: With dead ends: 40 [2018-01-23 14:40:09,717 INFO L226 Difference]: Without dead ends: 31 [2018-01-23 14:40:09,717 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:40:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-23 14:40:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-23 14:40:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-23 14:40:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-01-23 14:40:09,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-01-23 14:40:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:09,722 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-01-23 14:40:09,722 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:40:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-01-23 14:40:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-23 14:40:09,723 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:09,723 INFO L322 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:09,723 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash -509614448, now seen corresponding path program 12 times [2018-01-23 14:40:09,723 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:09,723 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:09,724 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:09,724 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:09,724 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:09,733 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:09,829 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:09,830 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 [2018-01-23 14:40:09,838 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:09,846 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:09,848 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:09,850 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:09,851 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:09,852 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:09,853 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:09,855 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:09,855 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:09,858 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:09,889 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:09,890 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-01-23 14:40:09,890 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-23 14:40:09,890 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-23 14:40:09,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:40:09,890 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 17 states. [2018-01-23 14:40:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:09,919 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-01-23 14:40:09,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:40:09,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-01-23 14:40:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:09,920 INFO L225 Difference]: With dead ends: 41 [2018-01-23 14:40:09,920 INFO L226 Difference]: Without dead ends: 32 [2018-01-23 14:40:09,921 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:40:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-23 14:40:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-23 14:40:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-23 14:40:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-01-23 14:40:09,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-01-23 14:40:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:09,925 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-01-23 14:40:09,925 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-23 14:40:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-01-23 14:40:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:40:09,926 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:09,926 INFO L322 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:09,926 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:09,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1762964149, now seen corresponding path program 13 times [2018-01-23 14:40:09,926 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:09,926 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:09,927 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:09,927 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:09,927 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:09,936 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:10,041 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:10,041 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 [2018-01-23 14:40:10,046 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:10,058 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:10,090 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:10,090 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-23 14:40:10,090 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:40:10,090 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:40:10,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:40:10,091 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 18 states. [2018-01-23 14:40:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:10,113 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-01-23 14:40:10,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:40:10,114 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2018-01-23 14:40:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:10,114 INFO L225 Difference]: With dead ends: 42 [2018-01-23 14:40:10,114 INFO L226 Difference]: Without dead ends: 33 [2018-01-23 14:40:10,115 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:40:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-23 14:40:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-23 14:40:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-23 14:40:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-23 14:40:10,118 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-01-23 14:40:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:10,118 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-23 14:40:10,118 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:40:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-23 14:40:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-23 14:40:10,119 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:10,119 INFO L322 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:10,119 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1962099216, now seen corresponding path program 14 times [2018-01-23 14:40:10,120 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:10,120 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:10,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:10,121 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:10,121 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:10,129 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:10,329 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:10,329 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 [2018-01-23 14:40:10,334 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:10,341 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:10,345 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:10,346 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:10,347 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:10,379 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:10,379 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-01-23 14:40:10,379 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-23 14:40:10,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-23 14:40:10,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:40:10,380 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 19 states. [2018-01-23 14:40:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:10,419 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-23 14:40:10,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-23 14:40:10,419 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-01-23 14:40:10,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:10,420 INFO L225 Difference]: With dead ends: 43 [2018-01-23 14:40:10,420 INFO L226 Difference]: Without dead ends: 34 [2018-01-23 14:40:10,421 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:40:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-23 14:40:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-23 14:40:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-23 14:40:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-01-23 14:40:10,425 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-01-23 14:40:10,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:10,425 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-01-23 14:40:10,425 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-23 14:40:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-01-23 14:40:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:40:10,426 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:10,426 INFO L322 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:10,426 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:10,426 INFO L82 PathProgramCache]: Analyzing trace with hash 454648299, now seen corresponding path program 15 times [2018-01-23 14:40:10,426 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:10,426 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:10,427 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:10,427 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:10,427 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:10,435 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:10,588 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:10,588 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 [2018-01-23 14:40:10,599 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:10,607 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,608 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,610 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,611 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,612 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,614 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,615 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,617 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,620 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:10,621 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:10,623 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:10,669 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:10,669 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-01-23 14:40:10,669 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:40:10,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:40:10,670 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:40:10,670 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 20 states. [2018-01-23 14:40:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:10,711 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-01-23 14:40:10,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:40:10,711 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2018-01-23 14:40:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:10,712 INFO L225 Difference]: With dead ends: 44 [2018-01-23 14:40:10,712 INFO L226 Difference]: Without dead ends: 35 [2018-01-23 14:40:10,713 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:40:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-23 14:40:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-23 14:40:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-23 14:40:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-01-23 14:40:10,717 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-01-23 14:40:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:10,717 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-01-23 14:40:10,718 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:40:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-01-23 14:40:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-23 14:40:10,718 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:10,718 INFO L322 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:10,719 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1935590064, now seen corresponding path program 16 times [2018-01-23 14:40:10,719 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:10,719 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:10,720 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:10,720 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:10,720 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:10,728 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:11,058 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:11,058 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 [2018-01-23 14:40:11,064 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:11,076 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:11,077 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:11,113 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:11,114 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-01-23 14:40:11,114 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-23 14:40:11,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-23 14:40:11,114 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:40:11,114 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 21 states. [2018-01-23 14:40:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:11,185 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-01-23 14:40:11,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:40:11,186 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2018-01-23 14:40:11,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:11,187 INFO L225 Difference]: With dead ends: 45 [2018-01-23 14:40:11,187 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:40:11,188 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:40:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:40:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-23 14:40:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-23 14:40:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-01-23 14:40:11,191 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-01-23 14:40:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:11,192 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-01-23 14:40:11,192 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-23 14:40:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-01-23 14:40:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-23 14:40:11,192 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:11,193 INFO L322 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:11,193 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1276432011, now seen corresponding path program 17 times [2018-01-23 14:40:11,193 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:11,193 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:11,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:11,194 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:11,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:11,201 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:11,387 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:11,387 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 [2018-01-23 14:40:11,392 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:11,396 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,397 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,398 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,399 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,400 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,400 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,401 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,402 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,403 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,406 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:11,407 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:11,409 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:11,441 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:11,441 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-01-23 14:40:11,442 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:40:11,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:40:11,442 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:40:11,442 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 22 states. [2018-01-23 14:40:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:11,482 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-01-23 14:40:11,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:40:11,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2018-01-23 14:40:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:11,483 INFO L225 Difference]: With dead ends: 46 [2018-01-23 14:40:11,483 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:40:11,483 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:40:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:40:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:40:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:40:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-01-23 14:40:11,486 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-01-23 14:40:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:11,486 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-01-23 14:40:11,486 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:40:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-01-23 14:40:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:40:11,487 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:11,487 INFO L322 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:11,487 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash 2064868528, now seen corresponding path program 18 times [2018-01-23 14:40:11,487 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:11,487 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:11,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:11,488 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:11,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:11,496 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:11,778 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:11,778 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 [2018-01-23 14:40:11,783 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:11,790 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,792 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,793 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,794 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,795 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,796 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,797 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,798 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,799 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,800 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:11,800 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:11,802 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:11,837 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:11,837 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-01-23 14:40:11,837 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-23 14:40:11,837 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-23 14:40:11,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:40:11,838 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 23 states. [2018-01-23 14:40:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:11,865 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-01-23 14:40:11,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:40:11,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2018-01-23 14:40:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:11,866 INFO L225 Difference]: With dead ends: 47 [2018-01-23 14:40:11,866 INFO L226 Difference]: Without dead ends: 38 [2018-01-23 14:40:11,867 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:40:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-23 14:40:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-23 14:40:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:40:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-23 14:40:11,871 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-01-23 14:40:11,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:11,871 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-23 14:40:11,871 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-23 14:40:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-23 14:40:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-23 14:40:11,872 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:11,872 INFO L322 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:11,872 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 736596779, now seen corresponding path program 19 times [2018-01-23 14:40:11,873 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:11,873 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:11,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:11,874 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:11,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:11,882 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:12,073 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:12,073 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 [2018-01-23 14:40:12,077 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:12,092 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:12,127 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:12,128 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-01-23 14:40:12,128 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:40:12,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:40:12,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:40:12,128 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 24 states. [2018-01-23 14:40:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:12,184 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-23 14:40:12,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:40:12,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2018-01-23 14:40:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:12,185 INFO L225 Difference]: With dead ends: 48 [2018-01-23 14:40:12,185 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:40:12,185 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:40:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:40:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:40:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:40:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-01-23 14:40:12,189 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-01-23 14:40:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:12,189 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-01-23 14:40:12,189 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:40:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-01-23 14:40:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-23 14:40:12,190 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:12,190 INFO L322 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:12,190 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:12,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1785121776, now seen corresponding path program 20 times [2018-01-23 14:40:12,190 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:12,190 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:12,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:12,191 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:12,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:12,198 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:12,404 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:12,404 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 [2018-01-23 14:40:12,409 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:12,416 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:12,421 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:12,422 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:12,423 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:12,458 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:12,458 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-01-23 14:40:12,458 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-23 14:40:12,459 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-23 14:40:12,459 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:40:12,459 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 25 states. [2018-01-23 14:40:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:12,486 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-01-23 14:40:12,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:40:12,487 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-01-23 14:40:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:12,487 INFO L225 Difference]: With dead ends: 49 [2018-01-23 14:40:12,487 INFO L226 Difference]: Without dead ends: 40 [2018-01-23 14:40:12,488 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:40:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-23 14:40:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-23 14:40:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-23 14:40:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-01-23 14:40:12,490 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-01-23 14:40:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:12,490 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-01-23 14:40:12,490 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-23 14:40:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-01-23 14:40:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-23 14:40:12,491 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:12,492 INFO L322 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:12,492 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1645981643, now seen corresponding path program 21 times [2018-01-23 14:40:12,492 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:12,492 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:12,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:12,493 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:12,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:12,500 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:12,693 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:12,693 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 [2018-01-23 14:40:12,700 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:12,706 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,708 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,709 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,710 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,711 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,712 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,713 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,714 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,715 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,716 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,717 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,718 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:12,719 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:12,720 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:12,757 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:12,757 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-01-23 14:40:12,757 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-23 14:40:12,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-23 14:40:12,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:40:12,758 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 26 states. [2018-01-23 14:40:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:12,787 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-01-23 14:40:12,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:40:12,787 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 39 [2018-01-23 14:40:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:12,788 INFO L225 Difference]: With dead ends: 50 [2018-01-23 14:40:12,788 INFO L226 Difference]: Without dead ends: 41 [2018-01-23 14:40:12,788 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:40:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-23 14:40:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-23 14:40:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:40:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-01-23 14:40:12,791 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-01-23 14:40:12,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:12,792 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-01-23 14:40:12,792 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-23 14:40:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-01-23 14:40:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-23 14:40:12,792 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:12,792 INFO L322 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:12,793 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash 636005232, now seen corresponding path program 22 times [2018-01-23 14:40:12,793 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:12,793 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:12,793 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:12,794 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:12,794 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:12,800 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:13,024 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:13,024 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 [2018-01-23 14:40:13,030 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:13,044 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:13,045 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:13,086 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:13,086 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-01-23 14:40:13,086 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-23 14:40:13,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-23 14:40:13,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:40:13,087 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 27 states. [2018-01-23 14:40:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:13,120 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-01-23 14:40:13,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-23 14:40:13,120 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 40 [2018-01-23 14:40:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:13,121 INFO L225 Difference]: With dead ends: 51 [2018-01-23 14:40:13,121 INFO L226 Difference]: Without dead ends: 42 [2018-01-23 14:40:13,121 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:40:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-23 14:40:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-23 14:40:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-23 14:40:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-01-23 14:40:13,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-01-23 14:40:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:13,124 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-01-23 14:40:13,124 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-23 14:40:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-01-23 14:40:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-23 14:40:13,124 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:13,125 INFO L322 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:13,125 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:13,125 INFO L82 PathProgramCache]: Analyzing trace with hash -608492437, now seen corresponding path program 23 times [2018-01-23 14:40:13,125 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:13,125 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:13,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:13,126 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:13,126 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:13,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:13,369 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:13,369 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 [2018-01-23 14:40:13,375 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:13,382 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,392 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,393 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,393 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,394 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,395 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,396 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,397 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,398 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,399 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,400 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,401 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,405 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:13,407 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:13,409 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:13,459 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:13,460 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-01-23 14:40:13,460 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:40:13,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:40:13,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:40:13,460 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 28 states. [2018-01-23 14:40:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:13,509 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-01-23 14:40:13,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:40:13,509 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2018-01-23 14:40:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:13,510 INFO L225 Difference]: With dead ends: 52 [2018-01-23 14:40:13,510 INFO L226 Difference]: Without dead ends: 43 [2018-01-23 14:40:13,511 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:40:13,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-23 14:40:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-23 14:40:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:40:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-23 14:40:13,514 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-01-23 14:40:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:13,515 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-23 14:40:13,515 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:40:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-23 14:40:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-23 14:40:13,515 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:13,515 INFO L322 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:13,516 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:13,516 INFO L82 PathProgramCache]: Analyzing trace with hash -533214512, now seen corresponding path program 24 times [2018-01-23 14:40:13,516 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:13,516 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:13,517 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:13,517 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:13,517 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:13,525 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:13,816 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:13,816 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 [2018-01-23 14:40:13,821 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:13,828 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,829 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,830 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,831 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,832 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,834 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,835 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,836 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,837 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,838 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,839 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,840 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,842 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:13,842 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:13,844 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:13,881 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:13,881 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-01-23 14:40:13,881 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-23 14:40:13,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-23 14:40:13,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:40:13,882 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 29 states. [2018-01-23 14:40:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:13,915 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-23 14:40:13,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:40:13,915 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2018-01-23 14:40:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:13,916 INFO L225 Difference]: With dead ends: 53 [2018-01-23 14:40:13,916 INFO L226 Difference]: Without dead ends: 44 [2018-01-23 14:40:13,917 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:40:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-23 14:40:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-23 14:40:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-23 14:40:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-01-23 14:40:13,920 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-01-23 14:40:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:13,920 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-01-23 14:40:13,920 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-23 14:40:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-01-23 14:40:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-23 14:40:13,921 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:13,921 INFO L322 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:13,921 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:13,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1800401163, now seen corresponding path program 25 times [2018-01-23 14:40:13,922 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:13,922 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:13,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:13,923 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:13,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:13,931 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:14,298 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:14,298 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 [2018-01-23 14:40:14,305 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:14,321 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:14,369 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:14,369 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-01-23 14:40:14,370 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-23 14:40:14,370 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-23 14:40:14,370 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:40:14,371 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 30 states. [2018-01-23 14:40:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:14,418 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-01-23 14:40:14,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-23 14:40:14,418 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 43 [2018-01-23 14:40:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:14,419 INFO L225 Difference]: With dead ends: 54 [2018-01-23 14:40:14,419 INFO L226 Difference]: Without dead ends: 45 [2018-01-23 14:40:14,420 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:40:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-23 14:40:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-23 14:40:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-23 14:40:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-01-23 14:40:14,422 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-01-23 14:40:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:14,423 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-01-23 14:40:14,423 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-23 14:40:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-01-23 14:40:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-23 14:40:14,423 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:14,423 INFO L322 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:14,423 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1128043056, now seen corresponding path program 26 times [2018-01-23 14:40:14,424 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:14,424 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:14,424 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:14,424 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:14,424 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:14,431 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:14,820 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:14,820 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 [2018-01-23 14:40:14,832 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:14,840 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:14,847 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:14,849 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:14,851 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:14,899 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:14,899 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-01-23 14:40:14,900 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-23 14:40:14,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-23 14:40:14,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:40:14,900 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 31 states. [2018-01-23 14:40:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:14,966 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-01-23 14:40:14,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-23 14:40:14,966 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-01-23 14:40:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:14,967 INFO L225 Difference]: With dead ends: 55 [2018-01-23 14:40:14,967 INFO L226 Difference]: Without dead ends: 46 [2018-01-23 14:40:14,967 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:40:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-23 14:40:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-23 14:40:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-23 14:40:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-01-23 14:40:14,971 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-01-23 14:40:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:14,971 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-01-23 14:40:14,971 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-23 14:40:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-01-23 14:40:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-23 14:40:14,972 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:14,972 INFO L322 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:14,972 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:14,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1759778219, now seen corresponding path program 27 times [2018-01-23 14:40:14,972 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:14,972 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:14,973 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:14,973 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:14,973 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:14,979 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:15,373 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:15,373 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 [2018-01-23 14:40:15,377 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:15,385 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,386 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,387 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,388 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,389 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,390 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,391 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,392 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,393 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,394 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,396 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,397 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,398 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,410 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,412 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:15,413 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:15,416 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:15,461 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:15,461 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-01-23 14:40:15,461 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-23 14:40:15,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-23 14:40:15,462 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:40:15,462 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 32 states. [2018-01-23 14:40:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:15,526 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-01-23 14:40:15,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-23 14:40:15,527 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2018-01-23 14:40:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:15,527 INFO L225 Difference]: With dead ends: 56 [2018-01-23 14:40:15,527 INFO L226 Difference]: Without dead ends: 47 [2018-01-23 14:40:15,528 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:40:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-23 14:40:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-23 14:40:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-23 14:40:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-01-23 14:40:15,531 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-01-23 14:40:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:15,531 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-01-23 14:40:15,531 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-23 14:40:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-01-23 14:40:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:40:15,532 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:15,532 INFO L322 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:15,532 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash -131268208, now seen corresponding path program 28 times [2018-01-23 14:40:15,532 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:15,533 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:15,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:15,533 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:15,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:15,542 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:15,822 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:15,822 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 [2018-01-23 14:40:15,828 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:15,842 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:15,844 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:15,876 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:15,876 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-01-23 14:40:15,876 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-23 14:40:15,877 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-23 14:40:15,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:40:15,877 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 33 states. [2018-01-23 14:40:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:15,965 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-01-23 14:40:15,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-23 14:40:15,965 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 46 [2018-01-23 14:40:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:15,966 INFO L225 Difference]: With dead ends: 57 [2018-01-23 14:40:15,966 INFO L226 Difference]: Without dead ends: 48 [2018-01-23 14:40:15,967 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:40:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-23 14:40:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-23 14:40:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-23 14:40:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-23 14:40:15,970 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-01-23 14:40:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:15,970 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-23 14:40:15,970 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-23 14:40:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-23 14:40:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-23 14:40:15,970 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:15,970 INFO L322 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:15,971 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1375834699, now seen corresponding path program 29 times [2018-01-23 14:40:15,971 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:15,971 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:15,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:15,971 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:15,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:15,978 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:16,279 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:16,279 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 [2018-01-23 14:40:16,283 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:16,287 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,288 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,289 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,290 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,290 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,291 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,294 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,295 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,296 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,297 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,298 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,299 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,303 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:16,304 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:16,306 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:16,338 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:16,338 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-01-23 14:40:16,339 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:40:16,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:40:16,339 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:40:16,339 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 34 states. [2018-01-23 14:40:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:16,388 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-23 14:40:16,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-23 14:40:16,388 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 47 [2018-01-23 14:40:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:16,388 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:40:16,388 INFO L226 Difference]: Without dead ends: 49 [2018-01-23 14:40:16,389 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:40:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-23 14:40:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-23 14:40:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-23 14:40:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-01-23 14:40:16,391 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-01-23 14:40:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:16,392 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-01-23 14:40:16,392 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:40:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-01-23 14:40:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-23 14:40:16,392 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:16,392 INFO L322 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:16,392 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 851384560, now seen corresponding path program 30 times [2018-01-23 14:40:16,393 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:16,393 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:16,393 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:16,393 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:16,393 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:16,402 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:17,037 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:17,037 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 [2018-01-23 14:40:17,045 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:17,052 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,056 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,057 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,062 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,063 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,065 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,066 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,067 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,069 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,070 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,072 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,073 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,078 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,080 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,081 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,083 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:17,084 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:17,086 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:17,122 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:17,122 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-01-23 14:40:17,123 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-23 14:40:17,123 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-23 14:40:17,123 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:40:17,124 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 35 states. [2018-01-23 14:40:17,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:17,178 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-01-23 14:40:17,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-23 14:40:17,178 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 48 [2018-01-23 14:40:17,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:17,179 INFO L225 Difference]: With dead ends: 59 [2018-01-23 14:40:17,179 INFO L226 Difference]: Without dead ends: 50 [2018-01-23 14:40:17,179 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:40:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-23 14:40:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-23 14:40:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-23 14:40:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-01-23 14:40:17,181 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-01-23 14:40:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:17,182 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-01-23 14:40:17,182 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-23 14:40:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-01-23 14:40:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-23 14:40:17,182 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:17,182 INFO L322 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:17,182 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1773299435, now seen corresponding path program 31 times [2018-01-23 14:40:17,183 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:17,183 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:17,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:17,183 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:17,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:17,190 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:17,517 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:17,517 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 [2018-01-23 14:40:17,523 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:17,538 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:17,577 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:17,578 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-01-23 14:40:17,578 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:40:17,578 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:40:17,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:40:17,578 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 36 states. [2018-01-23 14:40:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:17,616 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-01-23 14:40:17,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-23 14:40:17,616 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 49 [2018-01-23 14:40:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:17,617 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:40:17,617 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:40:17,617 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:40:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:40:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-23 14:40:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-23 14:40:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-01-23 14:40:17,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-01-23 14:40:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:17,620 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-01-23 14:40:17,620 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:40:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-01-23 14:40:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-23 14:40:17,620 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:17,620 INFO L322 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:17,620 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash 287889488, now seen corresponding path program 32 times [2018-01-23 14:40:17,621 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:17,621 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:17,621 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:17,621 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:17,621 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:17,630 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:17,992 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:17,992 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 [2018-01-23 14:40:17,997 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:18,004 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:18,010 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:18,012 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:18,013 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:18,045 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:18,045 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-01-23 14:40:18,046 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-23 14:40:18,046 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-23 14:40:18,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:40:18,046 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 37 states. [2018-01-23 14:40:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:18,114 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-01-23 14:40:18,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-23 14:40:18,114 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 50 [2018-01-23 14:40:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:18,115 INFO L225 Difference]: With dead ends: 61 [2018-01-23 14:40:18,115 INFO L226 Difference]: Without dead ends: 52 [2018-01-23 14:40:18,115 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:40:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-23 14:40:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-23 14:40:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-23 14:40:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-01-23 14:40:18,118 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-01-23 14:40:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:18,118 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-01-23 14:40:18,118 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-23 14:40:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-01-23 14:40:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-23 14:40:18,119 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:18,119 INFO L322 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:18,119 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1484821387, now seen corresponding path program 33 times [2018-01-23 14:40:18,119 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:18,119 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:18,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:18,120 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:18,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:18,126 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:18,557 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:18,557 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 [2018-01-23 14:40:18,562 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:18,569 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,571 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,572 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,573 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,574 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,575 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,576 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,577 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,578 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,580 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,581 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,582 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,583 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,584 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,585 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,586 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,588 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,589 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:18,589 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:18,591 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:18,625 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:18,625 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-01-23 14:40:18,625 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:40:18,626 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:40:18,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:40:18,626 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 38 states. [2018-01-23 14:40:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:18,661 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-01-23 14:40:18,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-23 14:40:18,662 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 51 [2018-01-23 14:40:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:18,662 INFO L225 Difference]: With dead ends: 62 [2018-01-23 14:40:18,662 INFO L226 Difference]: Without dead ends: 53 [2018-01-23 14:40:18,663 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:40:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-23 14:40:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-23 14:40:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-23 14:40:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-23 14:40:18,666 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-01-23 14:40:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:18,667 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-23 14:40:18,667 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:40:18,667 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-23 14:40:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-23 14:40:18,667 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:18,667 INFO L322 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:18,668 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:18,668 INFO L82 PathProgramCache]: Analyzing trace with hash -64995408, now seen corresponding path program 34 times [2018-01-23 14:40:18,668 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:18,668 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:18,668 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:18,668 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:18,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:18,675 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:19,042 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:19,042 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 [2018-01-23 14:40:19,046 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:19,063 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:19,065 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:19,097 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:19,097 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-01-23 14:40:19,098 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-23 14:40:19,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-23 14:40:19,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:40:19,098 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 39 states. [2018-01-23 14:40:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:19,148 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-23 14:40:19,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-23 14:40:19,149 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 52 [2018-01-23 14:40:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:19,149 INFO L225 Difference]: With dead ends: 63 [2018-01-23 14:40:19,149 INFO L226 Difference]: Without dead ends: 54 [2018-01-23 14:40:19,150 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:40:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-23 14:40:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-23 14:40:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-23 14:40:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-01-23 14:40:19,152 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-01-23 14:40:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:19,152 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-01-23 14:40:19,152 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-23 14:40:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-01-23 14:40:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-23 14:40:19,153 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:19,153 INFO L322 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:19,153 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash -864675797, now seen corresponding path program 35 times [2018-01-23 14:40:19,153 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:19,154 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:19,154 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:19,154 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:19,154 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:19,164 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:19,602 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:19,602 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 [2018-01-23 14:40:19,607 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:19,611 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,612 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,613 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,614 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,614 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,615 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,616 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,617 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,618 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,619 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,620 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,621 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,621 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,622 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,623 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,624 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,625 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,626 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,630 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:19,631 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:19,633 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:19,666 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:19,667 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-01-23 14:40:19,667 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:40:19,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:40:19,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:40:19,667 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 40 states. [2018-01-23 14:40:19,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:19,738 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-01-23 14:40:19,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-23 14:40:19,739 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 53 [2018-01-23 14:40:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:19,739 INFO L225 Difference]: With dead ends: 64 [2018-01-23 14:40:19,739 INFO L226 Difference]: Without dead ends: 55 [2018-01-23 14:40:19,740 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:40:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-23 14:40:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-23 14:40:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-23 14:40:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-01-23 14:40:19,742 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-01-23 14:40:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:19,742 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-01-23 14:40:19,743 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:40:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-01-23 14:40:19,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-23 14:40:19,743 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:19,743 INFO L322 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:19,743 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:19,743 INFO L82 PathProgramCache]: Analyzing trace with hash 115035920, now seen corresponding path program 36 times [2018-01-23 14:40:19,743 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:19,743 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:19,744 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:19,744 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:19,744 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:19,753 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:20,543 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:20,543 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 [2018-01-23 14:40:20,551 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:20,559 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,564 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,565 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,566 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,567 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,568 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,569 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,571 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,572 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,573 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,574 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,575 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,577 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,578 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,579 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,581 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,582 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,583 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,585 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:20,585 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:20,588 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:20,645 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:20,646 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-01-23 14:40:20,646 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-23 14:40:20,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-23 14:40:20,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:40:20,647 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 41 states. [2018-01-23 14:40:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:20,698 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-01-23 14:40:20,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-23 14:40:20,698 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2018-01-23 14:40:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:20,698 INFO L225 Difference]: With dead ends: 65 [2018-01-23 14:40:20,699 INFO L226 Difference]: Without dead ends: 56 [2018-01-23 14:40:20,699 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=786, Invalid=936, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:40:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-23 14:40:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-23 14:40:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-23 14:40:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-01-23 14:40:20,701 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-01-23 14:40:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:20,701 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-01-23 14:40:20,702 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-23 14:40:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-01-23 14:40:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-23 14:40:20,702 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:20,702 INFO L322 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:20,702 INFO L371 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:20,702 INFO L82 PathProgramCache]: Analyzing trace with hash 421328075, now seen corresponding path program 37 times [2018-01-23 14:40:20,702 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:20,702 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:20,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:20,703 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:20,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:20,712 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:21,135 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:21,135 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 [2018-01-23 14:40:21,140 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:21,156 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:21,190 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:21,190 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-01-23 14:40:21,190 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:40:21,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:40:21,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:40:21,191 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 42 states. [2018-01-23 14:40:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:21,230 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-01-23 14:40:21,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-23 14:40:21,230 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 55 [2018-01-23 14:40:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:21,230 INFO L225 Difference]: With dead ends: 66 [2018-01-23 14:40:21,230 INFO L226 Difference]: Without dead ends: 57 [2018-01-23 14:40:21,231 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:40:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-23 14:40:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-23 14:40:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-23 14:40:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-01-23 14:40:21,233 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-01-23 14:40:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:21,233 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-01-23 14:40:21,233 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:40:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-01-23 14:40:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-23 14:40:21,234 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:21,234 INFO L322 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:21,234 INFO L371 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1326450288, now seen corresponding path program 38 times [2018-01-23 14:40:21,234 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:21,234 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:21,234 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:21,235 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:21,235 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:21,242 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:21,811 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:21,811 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 [2018-01-23 14:40:21,816 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:21,823 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:21,831 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:21,833 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:21,835 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:21,867 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:21,868 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-01-23 14:40:21,868 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-23 14:40:21,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-23 14:40:21,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:40:21,869 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 43 states. [2018-01-23 14:40:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:21,928 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-01-23 14:40:21,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-23 14:40:21,928 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 56 [2018-01-23 14:40:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:21,929 INFO L225 Difference]: With dead ends: 67 [2018-01-23 14:40:21,929 INFO L226 Difference]: Without dead ends: 58 [2018-01-23 14:40:21,929 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:40:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-23 14:40:21,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-23 14:40:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-23 14:40:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-23 14:40:21,931 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-01-23 14:40:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:21,932 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-23 14:40:21,932 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-23 14:40:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-23 14:40:21,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-23 14:40:21,932 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:21,932 INFO L322 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:21,932 INFO L371 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash -679532181, now seen corresponding path program 39 times [2018-01-23 14:40:21,932 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:21,933 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:21,933 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:21,933 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:21,933 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:21,942 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:22,444 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:22,444 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 [2018-01-23 14:40:22,454 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:22,462 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,464 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,465 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,466 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,467 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,468 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,469 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,470 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,471 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,472 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,473 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,475 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,476 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,477 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,478 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,480 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,481 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,482 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,484 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,485 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,486 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:22,487 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:22,489 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:22,522 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:22,522 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-01-23 14:40:22,522 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:40:22,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:40:22,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:40:22,523 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 44 states. [2018-01-23 14:40:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:22,568 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-01-23 14:40:22,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-23 14:40:22,569 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 57 [2018-01-23 14:40:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:22,569 INFO L225 Difference]: With dead ends: 68 [2018-01-23 14:40:22,569 INFO L226 Difference]: Without dead ends: 59 [2018-01-23 14:40:22,570 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=909, Invalid=1071, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:40:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-23 14:40:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-23 14:40:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-23 14:40:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-01-23 14:40:22,572 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-01-23 14:40:22,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:22,572 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-01-23 14:40:22,572 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:40:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-01-23 14:40:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-23 14:40:22,573 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:22,573 INFO L322 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:22,573 INFO L371 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1559520720, now seen corresponding path program 40 times [2018-01-23 14:40:22,573 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:22,573 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:22,574 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:22,574 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:22,574 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:22,581 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:23,068 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:23,068 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 [2018-01-23 14:40:23,073 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:23,092 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:23,094 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:23,139 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:23,139 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-01-23 14:40:23,139 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-01-23 14:40:23,139 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-01-23 14:40:23,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:40:23,140 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 45 states. [2018-01-23 14:40:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:23,184 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-01-23 14:40:23,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-23 14:40:23,184 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 58 [2018-01-23 14:40:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:23,185 INFO L225 Difference]: With dead ends: 69 [2018-01-23 14:40:23,185 INFO L226 Difference]: Without dead ends: 60 [2018-01-23 14:40:23,186 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=952, Invalid=1118, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:40:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-23 14:40:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-23 14:40:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-23 14:40:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-01-23 14:40:23,188 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-01-23 14:40:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:23,188 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-01-23 14:40:23,188 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-01-23 14:40:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-01-23 14:40:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-01-23 14:40:23,189 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:23,189 INFO L322 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:23,189 INFO L371 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2044283381, now seen corresponding path program 41 times [2018-01-23 14:40:23,189 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:23,189 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:23,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:23,190 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:23,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:23,197 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:23,770 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:23,770 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 [2018-01-23 14:40:23,780 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:23,786 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,787 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,788 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,788 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,789 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,790 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,791 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,792 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,793 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,794 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,795 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,796 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,797 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,798 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,799 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,800 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,801 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,803 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,804 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,805 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,811 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:23,812 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:23,814 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:23,848 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:23,849 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-01-23 14:40:23,849 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-23 14:40:23,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-23 14:40:23,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:40:23,850 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 46 states. [2018-01-23 14:40:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:23,900 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-01-23 14:40:23,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-01-23 14:40:23,900 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 59 [2018-01-23 14:40:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:23,901 INFO L225 Difference]: With dead ends: 70 [2018-01-23 14:40:23,901 INFO L226 Difference]: Without dead ends: 61 [2018-01-23 14:40:23,901 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=996, Invalid=1166, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:40:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-23 14:40:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-23 14:40:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-23 14:40:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-01-23 14:40:23,903 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-01-23 14:40:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:23,904 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-01-23 14:40:23,904 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-23 14:40:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-01-23 14:40:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-01-23 14:40:23,904 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:23,904 INFO L322 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:23,905 INFO L371 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:23,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2093060816, now seen corresponding path program 42 times [2018-01-23 14:40:23,905 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:23,905 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:23,906 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:23,906 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:23,906 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:23,917 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:24,572 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:24,572 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 [2018-01-23 14:40:24,578 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:24,586 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,588 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,589 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,590 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,591 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,592 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,593 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,594 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,595 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,596 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,597 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,598 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,599 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,601 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,602 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,603 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,604 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,605 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,607 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,609 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,615 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,617 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:24,618 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:24,620 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:24,656 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:24,656 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-01-23 14:40:24,656 INFO L409 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-01-23 14:40:24,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-01-23 14:40:24,657 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:40:24,657 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 47 states. [2018-01-23 14:40:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:24,715 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-01-23 14:40:24,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-23 14:40:24,715 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 60 [2018-01-23 14:40:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:24,716 INFO L225 Difference]: With dead ends: 71 [2018-01-23 14:40:24,716 INFO L226 Difference]: Without dead ends: 62 [2018-01-23 14:40:24,716 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1041, Invalid=1215, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:40:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-23 14:40:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-01-23 14:40:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-23 14:40:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-01-23 14:40:24,720 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-01-23 14:40:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:24,721 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-01-23 14:40:24,721 INFO L433 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-01-23 14:40:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-01-23 14:40:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-23 14:40:24,721 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:24,721 INFO L322 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:24,721 INFO L371 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash 689805995, now seen corresponding path program 43 times [2018-01-23 14:40:24,722 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:24,722 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:24,722 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:24,722 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:24,723 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:24,730 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:25,295 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:25,295 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 [2018-01-23 14:40:25,300 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:25,318 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:25,351 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:25,352 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-01-23 14:40:25,384 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:40:25,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:40:25,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:40:25,385 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 48 states. [2018-01-23 14:40:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:25,439 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-01-23 14:40:25,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-01-23 14:40:25,439 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 61 [2018-01-23 14:40:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:25,439 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:40:25,439 INFO L226 Difference]: Without dead ends: 63 [2018-01-23 14:40:25,440 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2018-01-23 14:40:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-23 14:40:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-01-23 14:40:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-23 14:40:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-01-23 14:40:25,444 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-01-23 14:40:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:25,444 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-01-23 14:40:25,444 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:40:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-01-23 14:40:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-23 14:40:25,445 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:25,445 INFO L322 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:25,445 INFO L371 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1059331216, now seen corresponding path program 44 times [2018-01-23 14:40:25,445 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:25,446 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:25,446 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:25,446 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:25,446 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:25,455 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:26,035 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:26,035 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 [2018-01-23 14:40:26,040 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:26,047 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:26,056 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:26,058 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:26,060 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:26,096 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:26,096 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-01-23 14:40:26,097 INFO L409 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-01-23 14:40:26,097 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-01-23 14:40:26,097 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-01-23 14:40:26,097 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 49 states. [2018-01-23 14:40:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:26,185 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-01-23 14:40:26,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-23 14:40:26,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 62 [2018-01-23 14:40:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:26,186 INFO L225 Difference]: With dead ends: 73 [2018-01-23 14:40:26,186 INFO L226 Difference]: Without dead ends: 64 [2018-01-23 14:40:26,187 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1316, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:40:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-23 14:40:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-01-23 14:40:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-23 14:40:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-01-23 14:40:26,191 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-01-23 14:40:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:26,191 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-01-23 14:40:26,191 INFO L433 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-01-23 14:40:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-01-23 14:40:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-01-23 14:40:26,192 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:26,192 INFO L322 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:26,192 INFO L371 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:26,192 INFO L82 PathProgramCache]: Analyzing trace with hash -370288821, now seen corresponding path program 45 times [2018-01-23 14:40:26,192 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:26,192 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:26,193 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:26,193 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:26,193 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:26,204 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:26,882 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:26,882 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 [2018-01-23 14:40:26,887 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:26,894 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,896 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,897 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,898 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,899 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,900 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,901 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,902 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,904 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,905 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,906 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,907 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,908 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,909 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,911 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,912 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,913 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,914 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,916 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,917 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,919 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,920 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,921 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,922 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:26,923 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:26,925 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:26,967 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:26,967 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-01-23 14:40:26,967 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:40:26,967 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:40:26,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:40:26,968 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 50 states. [2018-01-23 14:40:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:27,015 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-01-23 14:40:27,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-23 14:40:27,015 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 63 [2018-01-23 14:40:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:27,016 INFO L225 Difference]: With dead ends: 74 [2018-01-23 14:40:27,016 INFO L226 Difference]: Without dead ends: 65 [2018-01-23 14:40:27,016 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1182, Invalid=1368, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:40:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-23 14:40:27,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-01-23 14:40:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-23 14:40:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-01-23 14:40:27,021 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-01-23 14:40:27,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:27,021 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-01-23 14:40:27,021 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:40:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-01-23 14:40:27,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-23 14:40:27,022 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:27,022 INFO L322 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:27,022 INFO L371 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:27,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1738837008, now seen corresponding path program 46 times [2018-01-23 14:40:27,022 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:27,022 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:27,023 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:27,023 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:27,023 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:27,031 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:27,676 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:27,676 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 [2018-01-23 14:40:27,681 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:27,703 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:27,705 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:27,747 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:27,748 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-01-23 14:40:27,748 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-01-23 14:40:27,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-01-23 14:40:27,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:40:27,749 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 51 states. [2018-01-23 14:40:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:27,816 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-01-23 14:40:27,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-01-23 14:40:27,816 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 64 [2018-01-23 14:40:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:27,817 INFO L225 Difference]: With dead ends: 75 [2018-01-23 14:40:27,817 INFO L226 Difference]: Without dead ends: 66 [2018-01-23 14:40:27,817 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1231, Invalid=1421, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:40:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-23 14:40:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-01-23 14:40:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-23 14:40:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-01-23 14:40:27,820 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-01-23 14:40:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:27,820 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-01-23 14:40:27,820 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-01-23 14:40:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-01-23 14:40:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-01-23 14:40:27,820 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:27,821 INFO L322 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:27,821 INFO L371 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1214157845, now seen corresponding path program 47 times [2018-01-23 14:40:27,821 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:27,821 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:27,822 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:27,822 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:27,822 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:27,834 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:28,929 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:28,929 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 [2018-01-23 14:40:28,934 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:28,938 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,939 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,940 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,940 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,941 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,942 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,943 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,944 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,944 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,945 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,946 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,947 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,948 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,949 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,950 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,951 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,952 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,953 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,954 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,955 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,956 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,957 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,958 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,959 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,963 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:28,965 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:28,967 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:29,002 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:29,002 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-01-23 14:40:29,002 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-23 14:40:29,003 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-23 14:40:29,003 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:40:29,003 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 52 states. [2018-01-23 14:40:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:29,055 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-01-23 14:40:29,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-23 14:40:29,055 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 65 [2018-01-23 14:40:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:29,055 INFO L225 Difference]: With dead ends: 76 [2018-01-23 14:40:29,055 INFO L226 Difference]: Without dead ends: 67 [2018-01-23 14:40:29,056 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:40:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-23 14:40:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-23 14:40:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-23 14:40:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-01-23 14:40:29,059 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-01-23 14:40:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:29,059 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-01-23 14:40:29,059 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-23 14:40:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-01-23 14:40:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-01-23 14:40:29,060 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:29,060 INFO L322 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:29,060 INFO L371 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:29,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2128972976, now seen corresponding path program 48 times [2018-01-23 14:40:29,060 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:29,060 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:29,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:29,061 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:29,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:29,068 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:29,752 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:29,752 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 [2018-01-23 14:40:29,757 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:29,765 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,766 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,767 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,768 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,769 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,770 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,771 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,772 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,773 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,774 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,776 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,777 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,778 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,779 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,780 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,781 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,782 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,784 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,785 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,786 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,787 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,789 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,790 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,791 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,793 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:29,793 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:29,795 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:29,830 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:29,830 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-01-23 14:40:29,830 INFO L409 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-01-23 14:40:29,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-01-23 14:40:29,831 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:40:29,831 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 53 states. [2018-01-23 14:40:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:29,893 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-01-23 14:40:29,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-23 14:40:29,893 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 66 [2018-01-23 14:40:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:29,894 INFO L225 Difference]: With dead ends: 77 [2018-01-23 14:40:29,894 INFO L226 Difference]: Without dead ends: 68 [2018-01-23 14:40:29,894 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2018-01-23 14:40:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-23 14:40:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-01-23 14:40:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-23 14:40:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-01-23 14:40:29,898 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-01-23 14:40:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:29,899 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-01-23 14:40:29,899 INFO L433 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-01-23 14:40:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-01-23 14:40:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-23 14:40:29,899 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:29,899 INFO L322 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:29,900 INFO L371 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash -423470965, now seen corresponding path program 49 times [2018-01-23 14:40:29,900 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:29,900 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:29,901 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:29,901 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:29,901 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:29,909 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:30,706 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:30,706 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 [2018-01-23 14:40:30,710 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:30,731 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:30,790 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:30,790 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-01-23 14:40:30,791 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-23 14:40:30,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-23 14:40:30,792 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2018-01-23 14:40:30,792 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 54 states. [2018-01-23 14:40:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:30,862 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-01-23 14:40:30,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-01-23 14:40:30,863 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 67 [2018-01-23 14:40:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:30,863 INFO L225 Difference]: With dead ends: 78 [2018-01-23 14:40:30,863 INFO L226 Difference]: Without dead ends: 69 [2018-01-23 14:40:30,864 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1384, Invalid=1586, Unknown=0, NotChecked=0, Total=2970 [2018-01-23 14:40:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-23 14:40:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-01-23 14:40:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-23 14:40:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-01-23 14:40:30,867 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-01-23 14:40:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:30,867 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-01-23 14:40:30,867 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-23 14:40:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-01-23 14:40:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-01-23 14:40:30,868 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:30,868 INFO L322 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:30,868 INFO L371 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash 907483824, now seen corresponding path program 50 times [2018-01-23 14:40:30,868 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:30,868 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:30,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:30,869 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:30,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:30,877 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:31,824 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:31,824 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 [2018-01-23 14:40:31,829 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:31,837 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:31,846 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:31,849 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:31,851 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:31,887 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:31,887 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-01-23 14:40:31,887 INFO L409 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-01-23 14:40:31,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-01-23 14:40:31,888 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2018-01-23 14:40:31,888 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 55 states. [2018-01-23 14:40:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:31,952 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-01-23 14:40:31,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-01-23 14:40:31,952 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 68 [2018-01-23 14:40:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:31,953 INFO L225 Difference]: With dead ends: 79 [2018-01-23 14:40:31,953 INFO L226 Difference]: Without dead ends: 70 [2018-01-23 14:40:31,953 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:40:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-23 14:40:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-23 14:40:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-23 14:40:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-01-23 14:40:31,956 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-01-23 14:40:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:31,956 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-01-23 14:40:31,956 INFO L433 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-01-23 14:40:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-01-23 14:40:31,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-23 14:40:31,956 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:31,956 INFO L322 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:31,957 INFO L371 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -782590677, now seen corresponding path program 51 times [2018-01-23 14:40:31,957 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:31,957 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:31,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:31,957 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:31,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:31,966 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:32,772 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:32,772 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 [2018-01-23 14:40:32,777 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:32,784 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,786 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,787 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,788 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,789 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,790 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,791 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,792 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,793 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,794 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,795 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,797 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,799 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,800 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,801 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,803 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,804 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,805 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,807 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,808 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,810 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,811 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,813 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,815 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,817 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,818 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:32,819 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:32,821 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:32,869 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:32,869 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-01-23 14:40:32,869 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-23 14:40:32,870 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-23 14:40:32,870 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:40:32,870 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 56 states. [2018-01-23 14:40:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:32,953 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-01-23 14:40:32,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-23 14:40:32,958 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 69 [2018-01-23 14:40:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:32,959 INFO L225 Difference]: With dead ends: 80 [2018-01-23 14:40:32,959 INFO L226 Difference]: Without dead ends: 71 [2018-01-23 14:40:32,959 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1491, Invalid=1701, Unknown=0, NotChecked=0, Total=3192 [2018-01-23 14:40:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-23 14:40:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-01-23 14:40:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-01-23 14:40:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-01-23 14:40:32,961 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-01-23 14:40:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:32,962 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-01-23 14:40:32,962 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-23 14:40:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-01-23 14:40:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-01-23 14:40:32,962 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:32,962 INFO L322 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:32,962 INFO L371 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1635292656, now seen corresponding path program 52 times [2018-01-23 14:40:32,963 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:32,963 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:32,963 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:32,963 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:32,963 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:32,971 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:33,747 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:33,748 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 [2018-01-23 14:40:33,752 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:33,773 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:33,775 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:33,818 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:33,818 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-01-23 14:40:33,818 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-01-23 14:40:33,818 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-01-23 14:40:33,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2018-01-23 14:40:33,819 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 57 states. [2018-01-23 14:40:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:33,904 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-01-23 14:40:33,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-01-23 14:40:33,904 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 70 [2018-01-23 14:40:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:33,905 INFO L225 Difference]: With dead ends: 81 [2018-01-23 14:40:33,905 INFO L226 Difference]: Without dead ends: 72 [2018-01-23 14:40:33,905 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1546, Invalid=1760, Unknown=0, NotChecked=0, Total=3306 [2018-01-23 14:40:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-23 14:40:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-01-23 14:40:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-23 14:40:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-01-23 14:40:33,908 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-01-23 14:40:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:33,909 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-01-23 14:40:33,909 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-01-23 14:40:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-01-23 14:40:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-23 14:40:33,909 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:33,910 INFO L322 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:33,910 INFO L371 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:33,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1995717067, now seen corresponding path program 53 times [2018-01-23 14:40:33,910 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:33,910 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:33,911 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:33,911 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:33,911 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:33,921 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:34,808 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:34,808 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 [2018-01-23 14:40:34,813 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:34,820 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,821 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,823 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,824 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,825 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,826 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,828 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,829 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,830 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,830 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,831 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,833 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,834 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,840 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,843 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,848 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,850 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,856 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,857 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,863 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,871 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,873 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,874 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,875 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,877 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,878 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,879 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,883 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:34,885 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:34,887 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:34,921 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:34,921 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-01-23 14:40:34,921 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-23 14:40:34,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-23 14:40:34,922 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2018-01-23 14:40:34,922 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 58 states. [2018-01-23 14:40:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:35,012 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-01-23 14:40:35,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-01-23 14:40:35,013 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 71 [2018-01-23 14:40:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:35,013 INFO L225 Difference]: With dead ends: 82 [2018-01-23 14:40:35,013 INFO L226 Difference]: Without dead ends: 73 [2018-01-23 14:40:35,014 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1602, Invalid=1820, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:40:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-23 14:40:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-23 14:40:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-23 14:40:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-01-23 14:40:35,016 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-01-23 14:40:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:35,017 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-01-23 14:40:35,017 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-23 14:40:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-01-23 14:40:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-01-23 14:40:35,017 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:35,017 INFO L322 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:35,017 INFO L371 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1407098512, now seen corresponding path program 54 times [2018-01-23 14:40:35,017 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:35,018 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:35,018 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:35,018 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:35,018 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:35,027 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:36,229 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:36,229 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 [2018-01-23 14:40:36,236 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:36,243 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,245 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,246 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,247 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,248 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,249 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,250 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,251 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,252 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,253 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,254 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,255 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,256 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,257 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,258 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,259 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,261 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,262 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,263 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,264 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,265 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,267 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,268 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,269 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,271 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,272 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,273 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,275 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:36,275 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:36,278 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:36,319 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:36,319 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-01-23 14:40:36,319 INFO L409 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-01-23 14:40:36,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-01-23 14:40:36,320 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:40:36,320 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 59 states. [2018-01-23 14:40:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:36,390 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-01-23 14:40:36,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-01-23 14:40:36,391 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 72 [2018-01-23 14:40:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:36,391 INFO L225 Difference]: With dead ends: 83 [2018-01-23 14:40:36,391 INFO L226 Difference]: Without dead ends: 74 [2018-01-23 14:40:36,392 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1659, Invalid=1881, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:40:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-23 14:40:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-01-23 14:40:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-23 14:40:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-01-23 14:40:36,394 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-01-23 14:40:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:36,394 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-01-23 14:40:36,394 INFO L433 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-01-23 14:40:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-01-23 14:40:36,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-01-23 14:40:36,395 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:36,395 INFO L322 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:36,395 INFO L371 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash 479800939, now seen corresponding path program 55 times [2018-01-23 14:40:36,395 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:36,395 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:36,396 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:36,396 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:36,396 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:36,409 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:37,358 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:37,358 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 [2018-01-23 14:40:37,365 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:37,386 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:37,424 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:37,425 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-01-23 14:40:37,425 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-23 14:40:37,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-23 14:40:37,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:40:37,425 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 60 states. [2018-01-23 14:40:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:37,485 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-01-23 14:40:37,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-01-23 14:40:37,485 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-01-23 14:40:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:37,486 INFO L225 Difference]: With dead ends: 84 [2018-01-23 14:40:37,486 INFO L226 Difference]: Without dead ends: 75 [2018-01-23 14:40:37,486 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1717, Invalid=1943, Unknown=0, NotChecked=0, Total=3660 [2018-01-23 14:40:37,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-23 14:40:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-01-23 14:40:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-23 14:40:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-01-23 14:40:37,489 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-01-23 14:40:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:37,489 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-01-23 14:40:37,489 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-23 14:40:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-01-23 14:40:37,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-01-23 14:40:37,489 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:37,489 INFO L322 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:37,489 INFO L371 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1155858224, now seen corresponding path program 56 times [2018-01-23 14:40:37,490 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:37,490 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:37,490 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:37,490 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:37,490 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:37,502 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:38,403 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:38,403 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 [2018-01-23 14:40:38,408 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:38,416 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:38,426 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:38,429 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:38,431 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:38,467 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:38,467 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-01-23 14:40:38,467 INFO L409 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-01-23 14:40:38,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-01-23 14:40:38,468 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2018-01-23 14:40:38,468 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 61 states. [2018-01-23 14:40:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:38,562 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-01-23 14:40:38,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-01-23 14:40:38,562 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 74 [2018-01-23 14:40:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:38,563 INFO L225 Difference]: With dead ends: 85 [2018-01-23 14:40:38,563 INFO L226 Difference]: Without dead ends: 76 [2018-01-23 14:40:38,563 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1776, Invalid=2006, Unknown=0, NotChecked=0, Total=3782 [2018-01-23 14:40:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-23 14:40:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-23 14:40:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-23 14:40:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-01-23 14:40:38,568 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-01-23 14:40:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:38,568 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-01-23 14:40:38,568 INFO L433 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-01-23 14:40:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-01-23 14:40:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-01-23 14:40:38,569 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:38,569 INFO L322 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:38,569 INFO L371 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -321684725, now seen corresponding path program 57 times [2018-01-23 14:40:38,569 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:38,569 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:38,570 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:38,570 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:38,570 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:38,584 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:39,612 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:39,612 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 [2018-01-23 14:40:39,616 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:39,624 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,626 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,627 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,628 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,629 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,630 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,631 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,632 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,633 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,634 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,636 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,637 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,638 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,639 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,640 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,641 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,642 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,644 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,645 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,646 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,647 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,649 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,650 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,652 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,653 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,655 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,656 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,658 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,659 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,660 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:39,661 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:39,663 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:39,698 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:39,698 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-01-23 14:40:39,698 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-23 14:40:39,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-23 14:40:39,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2018-01-23 14:40:39,699 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 62 states. [2018-01-23 14:40:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:39,757 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-01-23 14:40:39,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-01-23 14:40:39,757 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 75 [2018-01-23 14:40:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:39,758 INFO L225 Difference]: With dead ends: 86 [2018-01-23 14:40:39,758 INFO L226 Difference]: Without dead ends: 77 [2018-01-23 14:40:39,758 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1836, Invalid=2070, Unknown=0, NotChecked=0, Total=3906 [2018-01-23 14:40:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-23 14:40:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-01-23 14:40:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-23 14:40:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-01-23 14:40:39,762 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-01-23 14:40:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:39,762 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-01-23 14:40:39,762 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-23 14:40:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-01-23 14:40:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-01-23 14:40:39,762 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:39,762 INFO L322 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:39,763 INFO L371 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash -232110032, now seen corresponding path program 58 times [2018-01-23 14:40:39,763 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:39,763 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:39,763 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:39,763 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:39,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:39,773 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:40,814 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:40,814 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 [2018-01-23 14:40:40,819 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:40,840 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:40,842 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:40,891 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:40,891 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-01-23 14:40:40,892 INFO L409 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-01-23 14:40:40,892 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-01-23 14:40:40,892 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2018-01-23 14:40:40,892 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 63 states. [2018-01-23 14:40:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:41,005 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-01-23 14:40:41,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-01-23 14:40:41,005 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 76 [2018-01-23 14:40:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:41,006 INFO L225 Difference]: With dead ends: 87 [2018-01-23 14:40:41,006 INFO L226 Difference]: Without dead ends: 78 [2018-01-23 14:40:41,006 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1897, Invalid=2135, Unknown=0, NotChecked=0, Total=4032 [2018-01-23 14:40:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-23 14:40:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-01-23 14:40:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-23 14:40:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-01-23 14:40:41,008 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-01-23 14:40:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:41,009 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-01-23 14:40:41,009 INFO L433 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-01-23 14:40:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-01-23 14:40:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-23 14:40:41,009 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:41,009 INFO L322 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:41,009 INFO L371 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1750261845, now seen corresponding path program 59 times [2018-01-23 14:40:41,010 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:41,010 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:41,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:41,010 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:41,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:41,020 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:42,268 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:42,268 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 [2018-01-23 14:40:42,272 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:42,277 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,278 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,278 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,279 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,280 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,281 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,281 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,282 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,283 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,284 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,285 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,285 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,286 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,287 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,288 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,289 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,290 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,291 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,294 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,295 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,296 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,298 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,299 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,300 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,301 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,303 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,304 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,305 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,309 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:42,311 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:42,314 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:42,353 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:42,353 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-01-23 14:40:42,354 INFO L409 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-01-23 14:40:42,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-01-23 14:40:42,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2018-01-23 14:40:42,355 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 64 states. [2018-01-23 14:40:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:42,424 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-01-23 14:40:42,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-01-23 14:40:42,424 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 77 [2018-01-23 14:40:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:42,425 INFO L225 Difference]: With dead ends: 88 [2018-01-23 14:40:42,425 INFO L226 Difference]: Without dead ends: 79 [2018-01-23 14:40:42,425 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1959, Invalid=2201, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:40:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-23 14:40:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-01-23 14:40:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-01-23 14:40:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-01-23 14:40:42,427 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-01-23 14:40:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:42,428 INFO L432 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-01-23 14:40:42,428 INFO L433 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-01-23 14:40:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-01-23 14:40:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-23 14:40:42,428 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:42,428 INFO L322 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:42,428 INFO L371 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1568327792, now seen corresponding path program 60 times [2018-01-23 14:40:42,428 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:42,429 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:42,429 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:42,429 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:42,429 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:42,439 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:43,462 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:43,462 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 [2018-01-23 14:40:43,467 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:43,475 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,477 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,478 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,479 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,480 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,481 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,482 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,483 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,484 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,485 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,486 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,488 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,489 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,490 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,491 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,492 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,493 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,494 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,496 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,497 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,498 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,499 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,501 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,502 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,503 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,505 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,506 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,508 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,509 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,510 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,512 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:43,513 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:43,515 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:43,564 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:43,564 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-01-23 14:40:43,564 INFO L409 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-01-23 14:40:43,564 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-01-23 14:40:43,565 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:40:43,565 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 65 states. [2018-01-23 14:40:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:43,659 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-01-23 14:40:43,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-01-23 14:40:43,659 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 78 [2018-01-23 14:40:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:43,660 INFO L225 Difference]: With dead ends: 89 [2018-01-23 14:40:43,660 INFO L226 Difference]: Without dead ends: 80 [2018-01-23 14:40:43,660 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2022, Invalid=2268, Unknown=0, NotChecked=0, Total=4290 [2018-01-23 14:40:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-23 14:40:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-01-23 14:40:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-23 14:40:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-01-23 14:40:43,662 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-01-23 14:40:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:43,663 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-01-23 14:40:43,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-01-23 14:40:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-01-23 14:40:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-23 14:40:43,663 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:43,663 INFO L322 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:43,663 INFO L371 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:43,663 INFO L82 PathProgramCache]: Analyzing trace with hash -223339445, now seen corresponding path program 61 times [2018-01-23 14:40:43,664 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:43,664 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:43,664 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:43,664 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:43,664 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:43,674 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:45,001 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:45,001 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 [2018-01-23 14:40:45,006 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:45,029 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:45,067 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:45,067 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-01-23 14:40:45,067 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-01-23 14:40:45,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-01-23 14:40:45,068 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2018-01-23 14:40:45,068 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 66 states. [2018-01-23 14:40:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:45,153 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-01-23 14:40:45,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-01-23 14:40:45,153 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 79 [2018-01-23 14:40:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:45,154 INFO L225 Difference]: With dead ends: 90 [2018-01-23 14:40:45,154 INFO L226 Difference]: Without dead ends: 81 [2018-01-23 14:40:45,155 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2086, Invalid=2336, Unknown=0, NotChecked=0, Total=4422 [2018-01-23 14:40:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-23 14:40:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-23 14:40:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-23 14:40:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-01-23 14:40:45,159 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-01-23 14:40:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:45,159 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-01-23 14:40:45,159 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-01-23 14:40:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-01-23 14:40:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-01-23 14:40:45,160 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:45,160 INFO L322 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:45,160 INFO L371 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:45,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1478373648, now seen corresponding path program 62 times [2018-01-23 14:40:45,160 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:45,161 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:45,161 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:45,161 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:45,162 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:45,177 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:46,327 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:46,327 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 [2018-01-23 14:40:46,331 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:46,338 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:46,349 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:46,352 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:46,355 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:46,412 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:46,413 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-01-23 14:40:46,413 INFO L409 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-01-23 14:40:46,414 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-01-23 14:40:46,414 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2018-01-23 14:40:46,414 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 67 states. [2018-01-23 14:40:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:46,532 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-01-23 14:40:46,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-01-23 14:40:46,532 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 80 [2018-01-23 14:40:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:46,533 INFO L225 Difference]: With dead ends: 91 [2018-01-23 14:40:46,533 INFO L226 Difference]: Without dead ends: 82 [2018-01-23 14:40:46,533 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2151, Invalid=2405, Unknown=0, NotChecked=0, Total=4556 [2018-01-23 14:40:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-23 14:40:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-01-23 14:40:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-23 14:40:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-01-23 14:40:46,536 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-01-23 14:40:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:46,536 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-01-23 14:40:46,536 INFO L433 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-01-23 14:40:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-01-23 14:40:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-23 14:40:46,536 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:46,536 INFO L322 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:46,536 INFO L371 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:46,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1729728277, now seen corresponding path program 63 times [2018-01-23 14:40:46,537 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:46,537 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:46,538 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:46,538 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:46,538 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:46,549 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:47,932 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:47,932 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 [2018-01-23 14:40:47,940 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:40:47,950 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,951 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,952 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,953 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,954 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,955 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,956 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,957 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,958 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,962 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,963 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,965 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,966 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,967 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,968 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,969 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,970 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,972 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,973 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,974 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,975 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,977 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,978 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,979 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,981 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,982 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,984 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,985 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,987 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,988 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,990 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,991 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,993 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:40:47,993 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:47,996 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:48,042 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:48,042 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-01-23 14:40:48,042 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-23 14:40:48,043 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-23 14:40:48,043 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2018-01-23 14:40:48,043 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 68 states. [2018-01-23 14:40:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:48,133 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-01-23 14:40:48,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-01-23 14:40:48,133 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 81 [2018-01-23 14:40:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:48,134 INFO L225 Difference]: With dead ends: 92 [2018-01-23 14:40:48,134 INFO L226 Difference]: Without dead ends: 83 [2018-01-23 14:40:48,134 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2217, Invalid=2475, Unknown=0, NotChecked=0, Total=4692 [2018-01-23 14:40:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-01-23 14:40:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-01-23 14:40:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-23 14:40:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-01-23 14:40:48,137 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-01-23 14:40:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:48,137 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-01-23 14:40:48,137 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-23 14:40:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-01-23 14:40:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-23 14:40:48,137 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:48,138 INFO L322 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:48,138 INFO L371 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -931787184, now seen corresponding path program 64 times [2018-01-23 14:40:48,138 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:48,138 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:48,138 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:48,138 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:48,138 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:48,149 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:49,357 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:49,357 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 [2018-01-23 14:40:49,362 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:40:49,386 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:49,388 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:49,438 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:49,438 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-01-23 14:40:49,438 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-01-23 14:40:49,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-01-23 14:40:49,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2018-01-23 14:40:49,439 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 69 states. [2018-01-23 14:40:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:49,528 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-01-23 14:40:49,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-01-23 14:40:49,528 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 82 [2018-01-23 14:40:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:49,529 INFO L225 Difference]: With dead ends: 93 [2018-01-23 14:40:49,529 INFO L226 Difference]: Without dead ends: 84 [2018-01-23 14:40:49,530 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2284, Invalid=2546, Unknown=0, NotChecked=0, Total=4830 [2018-01-23 14:40:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-23 14:40:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-01-23 14:40:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-01-23 14:40:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-01-23 14:40:49,534 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-01-23 14:40:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:49,534 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-01-23 14:40:49,534 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-01-23 14:40:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-01-23 14:40:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-23 14:40:49,535 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:49,535 INFO L322 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:49,535 INFO L371 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:49,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1965417077, now seen corresponding path program 65 times [2018-01-23 14:40:49,536 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:49,536 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:49,536 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:49,536 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:49,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:49,551 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:50,757 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:50,784 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 [2018-01-23 14:40:50,789 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:40:50,794 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,795 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,795 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,796 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,797 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,798 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,798 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,799 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,800 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,801 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,802 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,802 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,803 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,804 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,805 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,806 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,808 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,809 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,810 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,811 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,812 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,813 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,815 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,816 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,817 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,818 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,820 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,821 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,822 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,824 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,825 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,826 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,831 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:50,833 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:50,836 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:50,882 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:50,882 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-01-23 14:40:50,882 INFO L409 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-01-23 14:40:50,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-01-23 14:40:50,883 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2018-01-23 14:40:50,883 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 70 states. [2018-01-23 14:40:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:50,966 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-01-23 14:40:50,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-01-23 14:40:50,967 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 83 [2018-01-23 14:40:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:50,967 INFO L225 Difference]: With dead ends: 94 [2018-01-23 14:40:50,967 INFO L226 Difference]: Without dead ends: 85 [2018-01-23 14:40:50,968 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2352, Invalid=2618, Unknown=0, NotChecked=0, Total=4970 [2018-01-23 14:40:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-23 14:40:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-01-23 14:40:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-23 14:40:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-01-23 14:40:50,970 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-01-23 14:40:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:50,970 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-01-23 14:40:50,970 INFO L433 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-01-23 14:40:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-01-23 14:40:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-01-23 14:40:50,971 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:50,971 INFO L322 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:50,971 INFO L371 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:50,971 INFO L82 PathProgramCache]: Analyzing trace with hash 351794608, now seen corresponding path program 66 times [2018-01-23 14:40:50,971 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:50,971 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:50,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:50,972 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:50,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:50,982 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:52,190 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:52,190 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:40:52,195 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:40:52,202 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,204 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,205 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,206 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,207 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,208 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,209 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,210 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,211 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,212 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,213 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,214 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,215 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,216 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,217 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,218 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,220 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,221 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,222 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,223 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,225 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,226 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,227 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,228 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,230 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,231 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,233 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,234 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,235 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,237 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,238 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,240 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,242 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,243 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:40:52,244 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:52,246 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:52,288 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:52,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-01-23 14:40:52,289 INFO L409 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-01-23 14:40:52,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-01-23 14:40:52,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2018-01-23 14:40:52,290 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 71 states. [2018-01-23 14:40:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:52,367 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-01-23 14:40:52,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-01-23 14:40:52,367 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 84 [2018-01-23 14:40:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:52,368 INFO L225 Difference]: With dead ends: 95 [2018-01-23 14:40:52,368 INFO L226 Difference]: Without dead ends: 86 [2018-01-23 14:40:52,368 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2421, Invalid=2691, Unknown=0, NotChecked=0, Total=5112 [2018-01-23 14:40:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-23 14:40:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-01-23 14:40:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-23 14:40:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-01-23 14:40:52,371 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-01-23 14:40:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:52,371 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-01-23 14:40:52,371 INFO L433 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-01-23 14:40:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-01-23 14:40:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-01-23 14:40:52,371 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:52,371 INFO L322 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:52,371 INFO L371 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash -829087189, now seen corresponding path program 67 times [2018-01-23 14:40:52,372 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:52,372 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:52,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:52,372 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:40:52,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:52,383 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:53,674 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:53,674 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:40:53,679 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:53,702 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:53,745 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:53,745 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-01-23 14:40:53,745 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-01-23 14:40:53,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-01-23 14:40:53,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2018-01-23 14:40:53,746 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 72 states. [2018-01-23 14:40:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:53,833 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-01-23 14:40:53,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-01-23 14:40:53,834 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 85 [2018-01-23 14:40:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:40:53,834 INFO L225 Difference]: With dead ends: 96 [2018-01-23 14:40:53,834 INFO L226 Difference]: Without dead ends: 87 [2018-01-23 14:40:53,835 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2491, Invalid=2765, Unknown=0, NotChecked=0, Total=5256 [2018-01-23 14:40:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-01-23 14:40:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-01-23 14:40:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-23 14:40:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-01-23 14:40:53,837 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-01-23 14:40:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:40:53,837 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-01-23 14:40:53,837 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-01-23 14:40:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-01-23 14:40:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-01-23 14:40:53,838 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:40:53,838 INFO L322 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:40:53,838 INFO L371 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:40:53,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1218282768, now seen corresponding path program 68 times [2018-01-23 14:40:53,838 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:40:53,838 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:40:53,839 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:53,839 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:40:53,839 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:40:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:40:53,850 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:40:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:55,141 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:40:55,141 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:40:55,146 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:40:55,153 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:55,165 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:40:55,168 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:40:55,171 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:40:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:40:55,221 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:40:55,221 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-01-23 14:40:55,221 INFO L409 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-01-23 14:40:55,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-01-23 14:40:55,222 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2018-01-23 14:40:55,222 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 73 states. [2018-01-23 14:40:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:40:55,365 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. Received shutdown request... [2018-01-23 14:40:55,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-01-23 14:40:55,365 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 86 [2018-01-23 14:40:55,366 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:40:55,369 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:40:55,369 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:40:55,369 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:40:55,369 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:40:55,369 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:40:55,369 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:40:55,370 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:40:55,370 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:40:55,370 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:40:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-23 14:40:55,371 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:40:55,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:40:55 BoogieIcfgContainer [2018-01-23 14:40:55,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:40:55,373 INFO L168 Benchmark]: Toolchain (without parser) took 49628.20 ms. Allocated memory was 307.2 MB in the beginning and 850.4 MB in the end (delta: 543.2 MB). Free memory was 268.1 MB in the beginning and 708.0 MB in the end (delta: -439.9 MB). Peak memory consumption was 103.3 MB. Max. memory is 5.3 GB. [2018-01-23 14:40:55,374 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 307.2 MB. Free memory is still 273.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:40:55,374 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.94 ms. Allocated memory is still 307.2 MB. Free memory was 267.1 MB in the beginning and 259.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 5.3 GB. [2018-01-23 14:40:55,375 INFO L168 Benchmark]: Boogie Preprocessor took 27.33 ms. Allocated memory is still 307.2 MB. Free memory was 259.9 MB in the beginning and 257.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:40:55,375 INFO L168 Benchmark]: RCFGBuilder took 191.51 ms. Allocated memory is still 307.2 MB. Free memory was 257.9 MB in the beginning and 245.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 5.3 GB. [2018-01-23 14:40:55,375 INFO L168 Benchmark]: TraceAbstraction took 49231.76 ms. Allocated memory was 307.2 MB in the beginning and 850.4 MB in the end (delta: 543.2 MB). Free memory was 244.8 MB in the beginning and 708.0 MB in the end (delta: -463.2 MB). Peak memory consumption was 80.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:40:55,377 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 307.2 MB. Free memory is still 273.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 166.94 ms. Allocated memory is still 307.2 MB. Free memory was 267.1 MB in the beginning and 259.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 27.33 ms. Allocated memory is still 307.2 MB. Free memory was 259.9 MB in the beginning and 257.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 191.51 ms. Allocated memory is still 307.2 MB. Free memory was 257.9 MB in the beginning and 245.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 49231.76 ms. Allocated memory was 307.2 MB in the beginning and 850.4 MB in the end (delta: 543.2 MB). Free memory was 244.8 MB in the beginning and 708.0 MB in the end (delta: -463.2 MB). Peak memory consumption was 80.0 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, 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, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while executing Accepts. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. TIMEOUT Result, 48.9s OverallTime, 69 OverallIterations, 68 TraceHistogramMax, 4.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1176 SDtfs, 138 SDslu, 19703 SDs, 0 SdLazy, 3949 SolverSat, 117 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6193 GetRequests, 3572 SyntacticMatches, 0 SemanticMatches, 2621 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6969 ImplicationChecksByTransitivity, 36.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=68, 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, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 68 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 39.6s InterpolantComputationTime, 7158 NumberOfCodeBlocks, 7158 NumberOfCodeBlocksAsserted, 743 NumberOfCheckSat, 7021 ConstructedInterpolants, 0 QuantifiedInterpolants, 1043579 SizeOfPredicates, 68 NumberOfNonLiveVariables, 11458 ConjunctsInSsa, 2550 ConjunctsInUnsatCore, 137 InterpolantComputations, 1 PerfectInterpolantSequences, 0/109480 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 25). Cancelled while IsEmpty was searching accepting run (input had 22 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, 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, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero3_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-40-55-386.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero3_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-40-55-386.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero3_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-40-55-386.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero3_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-40-55-386.csv Completed graceful shutdown