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/reducercommutativity/sep60_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d63d1fb [2018-01-27 23:06:43,503 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-27 23:06:43,505 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-27 23:06:43,523 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-27 23:06:43,523 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-27 23:06:43,525 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-27 23:06:43,526 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-27 23:06:43,531 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-27 23:06:43,533 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-27 23:06:43,535 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-27 23:06:43,536 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-27 23:06:43,537 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-27 23:06:43,538 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-27 23:06:43,539 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-27 23:06:43,540 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-27 23:06:43,543 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-27 23:06:43,545 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-27 23:06:43,548 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-27 23:06:43,549 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-27 23:06:43,551 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-27 23:06:43,553 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-27 23:06:43,554 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-27 23:06:43,554 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-27 23:06:43,555 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-27 23:06:43,556 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-27 23:06:43,557 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-27 23:06:43,558 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-27 23:06:43,558 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-27 23:06:43,559 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-27 23:06:43,559 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-27 23:06:43,560 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-27 23:06:43,560 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 [2018-01-27 23:06:43,572 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-27 23:06:43,572 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-27 23:06:43,573 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-27 23:06:43,573 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-27 23:06:43,573 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-27 23:06:43,574 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-27 23:06:43,574 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-27 23:06:43,575 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-27 23:06:43,575 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-27 23:06:43,575 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-27 23:06:43,575 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-27 23:06:43,576 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-27 23:06:43,576 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-27 23:06:43,576 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-27 23:06:43,576 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-27 23:06:43,576 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-27 23:06:43,577 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-27 23:06:43,577 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-27 23:06:43,577 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-27 23:06:43,577 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-27 23:06:43,578 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-27 23:06:43,578 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-27 23:06:43,578 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-27 23:06:43,578 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-27 23:06:43,578 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-27 23:06:43,579 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-27 23:06:43,579 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-27 23:06:43,579 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-27 23:06:43,579 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-27 23:06:43,579 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-27 23:06:43,580 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-27 23:06:43,580 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-27 23:06:43,580 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-27 23:06:43,580 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-27 23:06:43,580 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-27 23:06:43,581 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-27 23:06:43,582 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-27 23:06:43,634 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-27 23:06:43,647 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-27 23:06:43,651 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-27 23:06:43,654 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-27 23:06:43,654 INFO L276 PluginConnector]: CDTParser initialized [2018-01-27 23:06:43,655 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60_true-unreach-call.i [2018-01-27 23:06:43,781 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-27 23:06:43,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-27 23:06:43,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-27 23:06:43,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-27 23:06:43,804 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-27 23:06:43,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:06:43" (1/1) ... [2018-01-27 23:06:43,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38509d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:43, skipping insertion in model container [2018-01-27 23:06:43,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:06:43" (1/1) ... [2018-01-27 23:06:43,831 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 23:06:43,853 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 23:06:44,039 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 23:06:44,067 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 23:06:44,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44 WrapperNode [2018-01-27 23:06:44,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-27 23:06:44,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-27 23:06:44,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-27 23:06:44,080 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-27 23:06:44,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (1/1) ... [2018-01-27 23:06:44,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (1/1) ... [2018-01-27 23:06:44,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (1/1) ... [2018-01-27 23:06:44,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (1/1) ... [2018-01-27 23:06:44,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (1/1) ... [2018-01-27 23:06:44,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (1/1) ... [2018-01-27 23:06:44,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (1/1) ... [2018-01-27 23:06:44,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-27 23:06:44,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-27 23:06:44,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-27 23:06:44,142 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-27 23:06:44,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (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 [2018-01-27 23:06:44,217 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-27 23:06:44,217 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-27 23:06:44,217 INFO L136 BoogieDeclarations]: Found implementation of procedure sep [2018-01-27 23:06:44,217 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-27 23:06:44,218 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-27 23:06:44,218 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-27 23:06:44,218 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-27 23:06:44,218 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-27 23:06:44,218 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-27 23:06:44,218 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-27 23:06:44,219 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-27 23:06:44,219 INFO L128 BoogieDeclarations]: Found specification of procedure sep [2018-01-27 23:06:44,219 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-27 23:06:44,219 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-27 23:06:44,219 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-27 23:06:44,751 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-27 23:06:44,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:06:44 BoogieIcfgContainer [2018-01-27 23:06:44,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-27 23:06:44,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-27 23:06:44,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-27 23:06:44,757 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-27 23:06:44,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:06:43" (1/3) ... [2018-01-27 23:06:44,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7a9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:06:44, skipping insertion in model container [2018-01-27 23:06:44,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:06:44" (2/3) ... [2018-01-27 23:06:44,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7a9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:06:44, skipping insertion in model container [2018-01-27 23:06:44,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:06:44" (3/3) ... [2018-01-27 23:06:44,761 INFO L105 eAbstractionObserver]: Analyzing ICFG sep60_true-unreach-call.i [2018-01-27 23:06:44,771 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-27 23:06:44,779 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-27 23:06:44,849 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:06:44,849 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:06:44,849 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:06:44,850 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:06:44,850 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:06:44,850 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:06:44,850 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:06:44,850 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-27 23:06:44,851 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:06:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:06:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-27 23:06:44,883 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:44,885 INFO L330 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-27 23:06:44,885 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-27 23:06:44,892 INFO L82 PathProgramCache]: Analyzing trace with hash 118205, now seen corresponding path program 1 times [2018-01-27 23:06:44,895 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:44,896 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:44,963 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:44,964 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:44,964 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-27 23:06:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-27 23:06:45,035 INFO L389 BasicCegarLoop]: Counterexample might be feasible [2018-01-27 23:06:45,045 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-27 23:06:45,056 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:06:45,057 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:06:45,057 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:06:45,057 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:06:45,057 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:06:45,057 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:06:45,057 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:06:45,057 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-27 23:06:45,058 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:06:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:06:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-27 23:06:45,065 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:45,066 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:45,066 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1534485562, now seen corresponding path program 1 times [2018-01-27 23:06:45,066 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:45,067 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:45,068 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:45,071 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:45,072 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:45,105 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-01-27 23:06:45,198 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:06:45,199 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-27 23:06:45,200 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-27 23:06:45,216 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-27 23:06:45,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-27 23:06:45,220 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-01-27 23:06:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:45,260 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2018-01-27 23:06:45,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-27 23:06:45,262 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2018-01-27 23:06:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:45,281 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:06:45,281 INFO L226 Difference]: Without dead ends: 50 [2018-01-27 23:06:45,287 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-27 23:06:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-27 23:06:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-27 23:06:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-27 23:06:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2018-01-27 23:06:45,443 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2018-01-27 23:06:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:45,444 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2018-01-27 23:06:45,444 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-27 23:06:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2018-01-27 23:06:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-27 23:06:45,447 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:45,447 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:45,448 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:45,448 INFO L82 PathProgramCache]: Analyzing trace with hash -156806073, now seen corresponding path program 1 times [2018-01-27 23:06:45,448 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:45,448 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:45,449 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:45,450 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:45,450 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:45,478 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-27 23:06:45,566 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:06:45,566 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-27 23:06:45,569 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 23:06:45,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 23:06:45,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:06:45,570 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 3 states. [2018-01-27 23:06:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:45,645 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2018-01-27 23:06:45,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:06:45,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-01-27 23:06:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:45,647 INFO L225 Difference]: With dead ends: 93 [2018-01-27 23:06:45,648 INFO L226 Difference]: Without dead ends: 55 [2018-01-27 23:06:45,649 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:06:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-27 23:06:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2018-01-27 23:06:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-27 23:06:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-27 23:06:45,659 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 51 [2018-01-27 23:06:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:45,660 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-27 23:06:45,660 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 23:06:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-27 23:06:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-27 23:06:45,665 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:45,665 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:45,665 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:45,665 INFO L82 PathProgramCache]: Analyzing trace with hash 977157338, now seen corresponding path program 1 times [2018-01-27 23:06:45,666 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:45,666 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:45,667 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:45,667 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:45,668 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:45,712 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-27 23:06:45,811 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:45,812 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 [2018-01-27 23:06:45,832 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:45,918 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-01-27 23:06:46,076 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-27 23:06:46,077 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-01-27 23:06:46,077 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-27 23:06:46,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-27 23:06:46,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-27 23:06:46,078 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 4 states. [2018-01-27 23:06:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:46,163 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2018-01-27 23:06:46,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:06:46,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-01-27 23:06:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:46,165 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:06:46,165 INFO L226 Difference]: Without dead ends: 57 [2018-01-27 23:06:46,166 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-27 23:06:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-27 23:06:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2018-01-27 23:06:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-27 23:06:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-27 23:06:46,175 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 56 [2018-01-27 23:06:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:46,175 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-27 23:06:46,175 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-27 23:06:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-27 23:06:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-27 23:06:46,178 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:46,178 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:46,178 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:46,179 INFO L82 PathProgramCache]: Analyzing trace with hash 901586011, now seen corresponding path program 1 times [2018-01-27 23:06:46,179 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:46,180 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:46,181 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:46,181 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:46,181 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:46,251 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:06:46,393 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:06:46,420 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-27 23:06:46,421 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 23:06:46,421 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 23:06:46,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:06:46,422 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 3 states. [2018-01-27 23:06:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:46,553 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2018-01-27 23:06:46,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:06:46,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2018-01-27 23:06:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:46,560 INFO L225 Difference]: With dead ends: 82 [2018-01-27 23:06:46,561 INFO L226 Difference]: Without dead ends: 60 [2018-01-27 23:06:46,561 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:06:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-27 23:06:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-01-27 23:06:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-27 23:06:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-01-27 23:06:46,574 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 71 [2018-01-27 23:06:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:46,579 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-01-27 23:06:46,579 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 23:06:46,579 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-01-27 23:06:46,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-27 23:06:46,581 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:46,582 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:46,582 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash -61334317, now seen corresponding path program 1 times [2018-01-27 23:06:46,587 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:46,587 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:46,588 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:46,589 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:46,589 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:46,655 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:06:46,871 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:46,872 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 [2018-01-27 23:06:46,885 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:46,952 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:06:47,059 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:47,060 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-01-27 23:06:47,061 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-27 23:06:47,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-27 23:06:47,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-27 23:06:47,061 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 5 states. [2018-01-27 23:06:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:47,108 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2018-01-27 23:06:47,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-27 23:06:47,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2018-01-27 23:06:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:47,110 INFO L225 Difference]: With dead ends: 106 [2018-01-27 23:06:47,110 INFO L226 Difference]: Without dead ends: 64 [2018-01-27 23:06:47,111 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-27 23:06:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-27 23:06:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2018-01-27 23:06:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-27 23:06:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2018-01-27 23:06:47,120 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 77 [2018-01-27 23:06:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:47,121 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2018-01-27 23:06:47,121 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-27 23:06:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2018-01-27 23:06:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-27 23:06:47,123 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:47,123 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:47,123 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:47,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1322671194, now seen corresponding path program 2 times [2018-01-27 23:06:47,124 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:47,124 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:47,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:47,125 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:47,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:47,163 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:06:47,257 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:47,257 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 [2018-01-27 23:06:47,278 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:06:47,301 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:47,330 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:47,343 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:47,348 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:06:47,520 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:47,520 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-27 23:06:47,521 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-27 23:06:47,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-27 23:06:47,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-27 23:06:47,522 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 6 states. [2018-01-27 23:06:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:47,657 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2018-01-27 23:06:47,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-27 23:06:47,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2018-01-27 23:06:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:47,660 INFO L225 Difference]: With dead ends: 111 [2018-01-27 23:06:47,660 INFO L226 Difference]: Without dead ends: 69 [2018-01-27 23:06:47,661 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-27 23:06:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-27 23:06:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-01-27 23:06:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-27 23:06:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2018-01-27 23:06:47,669 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 82 [2018-01-27 23:06:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:47,673 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2018-01-27 23:06:47,674 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-27 23:06:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2018-01-27 23:06:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-27 23:06:47,677 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:47,677 INFO L330 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:47,678 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:47,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1751804083, now seen corresponding path program 3 times [2018-01-27 23:06:47,678 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:47,678 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:47,679 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:47,679 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:47,679 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:47,739 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:06:48,167 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:48,167 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) [2018-01-27 23:06:48,180 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:48,206 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:48,231 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:48,244 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:48,249 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-01-27 23:06:48,514 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:48,514 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-01-27 23:06:48,515 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-27 23:06:48,516 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-27 23:06:48,516 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:06:48,516 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 8 states. [2018-01-27 23:06:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:48,714 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2018-01-27 23:06:48,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-27 23:06:48,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2018-01-27 23:06:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:48,716 INFO L225 Difference]: With dead ends: 124 [2018-01-27 23:06:48,717 INFO L226 Difference]: Without dead ends: 82 [2018-01-27 23:06:48,717 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:06:48,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-27 23:06:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2018-01-27 23:06:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-27 23:06:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2018-01-27 23:06:48,726 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 87 [2018-01-27 23:06:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:48,726 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2018-01-27 23:06:48,726 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-27 23:06:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2018-01-27 23:06:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-01-27 23:06:48,728 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:48,728 INFO L330 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:48,728 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -465935121, now seen corresponding path program 4 times [2018-01-27 23:06:48,729 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:48,729 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:48,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:48,730 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:48,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:48,760 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:06:48,999 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:48,999 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 [2018-01-27 23:06:49,009 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:06:49,069 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:49,076 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:06:49,148 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:49,148 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-27 23:06:49,149 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-27 23:06:49,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-27 23:06:49,149 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:06:49,149 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 8 states. [2018-01-27 23:06:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:49,191 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2018-01-27 23:06:49,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-27 23:06:49,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2018-01-27 23:06:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:49,194 INFO L225 Difference]: With dead ends: 131 [2018-01-27 23:06:49,194 INFO L226 Difference]: Without dead ends: 84 [2018-01-27 23:06:49,195 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:06:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-27 23:06:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2018-01-27 23:06:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-27 23:06:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2018-01-27 23:06:49,206 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 107 [2018-01-27 23:06:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:49,206 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2018-01-27 23:06:49,206 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-27 23:06:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2018-01-27 23:06:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-01-27 23:06:49,207 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:49,208 INFO L330 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:49,208 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:49,208 INFO L82 PathProgramCache]: Analyzing trace with hash 704280706, now seen corresponding path program 5 times [2018-01-27 23:06:49,208 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:49,209 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:49,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:49,209 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:49,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:49,245 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:06:49,754 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:49,755 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 [2018-01-27 23:06:49,760 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:06:49,777 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:49,790 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:49,798 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:49,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:49,825 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:49,833 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:49,847 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 62 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-01-27 23:06:49,933 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:49,934 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-01-27 23:06:49,934 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:06:49,934 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:06:49,935 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:06:49,935 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 11 states. [2018-01-27 23:06:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:50,245 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2018-01-27 23:06:50,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:06:50,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 112 [2018-01-27 23:06:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:50,247 INFO L225 Difference]: With dead ends: 144 [2018-01-27 23:06:50,247 INFO L226 Difference]: Without dead ends: 97 [2018-01-27 23:06:50,248 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:06:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-27 23:06:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2018-01-27 23:06:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-27 23:06:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2018-01-27 23:06:50,257 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 112 [2018-01-27 23:06:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:50,257 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2018-01-27 23:06:50,258 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:06:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2018-01-27 23:06:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-01-27 23:06:50,259 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:50,260 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 7, 6, 6, 6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:50,260 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash -942204730, now seen corresponding path program 6 times [2018-01-27 23:06:50,260 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:50,260 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:50,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:50,261 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:50,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:50,302 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-01-27 23:06:50,515 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:50,515 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 [2018-01-27 23:06:50,523 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:06:50,542 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:50,545 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:50,551 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:50,559 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:50,581 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:50,589 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:50,595 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-01-27 23:06:50,690 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:50,690 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2018-01-27 23:06:50,691 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:06:50,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:06:50,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:06:50,692 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 11 states. [2018-01-27 23:06:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:50,784 INFO L93 Difference]: Finished difference Result 161 states and 176 transitions. [2018-01-27 23:06:50,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:06:50,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2018-01-27 23:06:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:50,786 INFO L225 Difference]: With dead ends: 161 [2018-01-27 23:06:50,786 INFO L226 Difference]: Without dead ends: 109 [2018-01-27 23:06:50,787 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:06:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-27 23:06:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2018-01-27 23:06:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-27 23:06:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2018-01-27 23:06:50,797 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 132 [2018-01-27 23:06:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:50,798 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2018-01-27 23:06:50,798 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:06:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2018-01-27 23:06:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-01-27 23:06:50,800 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:50,800 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:50,800 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1709902091, now seen corresponding path program 7 times [2018-01-27 23:06:50,801 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:50,801 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:50,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:50,802 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:50,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:50,832 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:06:50,990 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:50,990 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 [2018-01-27 23:06:50,996 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:51,050 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:06:51,094 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:51,094 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-27 23:06:51,095 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:06:51,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:06:51,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:06:51,095 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 11 states. [2018-01-27 23:06:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:51,137 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2018-01-27 23:06:51,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-27 23:06:51,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2018-01-27 23:06:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:51,139 INFO L225 Difference]: With dead ends: 168 [2018-01-27 23:06:51,139 INFO L226 Difference]: Without dead ends: 110 [2018-01-27 23:06:51,140 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:06:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-27 23:06:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2018-01-27 23:06:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-27 23:06:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2018-01-27 23:06:51,149 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 143 [2018-01-27 23:06:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:51,149 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2018-01-27 23:06:51,149 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:06:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2018-01-27 23:06:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-01-27 23:06:51,151 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:51,151 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:51,151 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:51,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1984164066, now seen corresponding path program 8 times [2018-01-27 23:06:51,152 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:51,152 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:51,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:51,153 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:51,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:51,184 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:06:51,357 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:51,358 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 [2018-01-27 23:06:51,363 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:06:51,378 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:51,397 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:51,401 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:51,413 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:06:51,475 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:51,475 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-27 23:06:51,475 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-27 23:06:51,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-27 23:06:51,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:06:51,476 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 12 states. [2018-01-27 23:06:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:51,514 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-01-27 23:06:51,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:06:51,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 148 [2018-01-27 23:06:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:51,518 INFO L225 Difference]: With dead ends: 173 [2018-01-27 23:06:51,518 INFO L226 Difference]: Without dead ends: 115 [2018-01-27 23:06:51,519 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:06:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-27 23:06:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-01-27 23:06:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-27 23:06:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2018-01-27 23:06:51,527 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 148 [2018-01-27 23:06:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:51,527 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2018-01-27 23:06:51,527 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-27 23:06:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2018-01-27 23:06:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-01-27 23:06:51,529 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:51,529 INFO L330 BasicCegarLoop]: trace histogram [12, 10, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:51,530 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2114641131, now seen corresponding path program 9 times [2018-01-27 23:06:51,530 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:51,530 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:51,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:51,533 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:51,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:51,564 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:06:52,150 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:52,150 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 [2018-01-27 23:06:52,156 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:06:52,172 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:52,178 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:52,183 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:52,190 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:52,191 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:52,193 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 124 proven. 21 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-01-27 23:06:52,322 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:52,322 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2018-01-27 23:06:52,323 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-27 23:06:52,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-27 23:06:52,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:06:52,324 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand 16 states. [2018-01-27 23:06:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:52,526 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2018-01-27 23:06:52,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:06:52,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 153 [2018-01-27 23:06:52,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:52,528 INFO L225 Difference]: With dead ends: 186 [2018-01-27 23:06:52,528 INFO L226 Difference]: Without dead ends: 128 [2018-01-27 23:06:52,529 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:06:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-27 23:06:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2018-01-27 23:06:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-27 23:06:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2018-01-27 23:06:52,536 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 153 [2018-01-27 23:06:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:52,536 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2018-01-27 23:06:52,536 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-27 23:06:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2018-01-27 23:06:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-27 23:06:52,538 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:52,539 INFO L330 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 11, 10, 10, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:52,539 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1819817847, now seen corresponding path program 10 times [2018-01-27 23:06:52,539 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:52,539 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:52,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:52,540 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:52,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:52,570 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:06:52,775 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:52,775 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 [2018-01-27 23:06:52,780 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:06:52,851 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:52,855 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:06:52,947 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:52,947 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-01-27 23:06:52,948 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-27 23:06:52,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-27 23:06:52,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-27 23:06:52,948 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand 14 states. [2018-01-27 23:06:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:53,007 INFO L93 Difference]: Finished difference Result 193 states and 209 transitions. [2018-01-27 23:06:53,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-27 23:06:53,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 173 [2018-01-27 23:06:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:53,009 INFO L225 Difference]: With dead ends: 193 [2018-01-27 23:06:53,009 INFO L226 Difference]: Without dead ends: 130 [2018-01-27 23:06:53,009 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-27 23:06:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-27 23:06:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2018-01-27 23:06:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-27 23:06:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 135 transitions. [2018-01-27 23:06:53,016 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 135 transitions. Word has length 173 [2018-01-27 23:06:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:53,016 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 135 transitions. [2018-01-27 23:06:53,016 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-27 23:06:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 135 transitions. [2018-01-27 23:06:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-01-27 23:06:53,018 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:53,018 INFO L330 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 12, 11, 11, 11, 11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:53,018 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash -830367158, now seen corresponding path program 11 times [2018-01-27 23:06:53,018 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:53,018 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:53,019 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:53,019 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:53,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:53,052 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:06:53,572 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:53,572 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 [2018-01-27 23:06:53,579 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:06:53,592 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,603 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,617 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,636 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,649 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,662 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,679 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,698 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,709 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,779 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,828 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:53,840 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:53,845 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 198 proven. 38 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-01-27 23:06:54,293 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:54,294 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2018-01-27 23:06:54,294 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-27 23:06:54,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-27 23:06:54,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:06:54,295 INFO L87 Difference]: Start difference. First operand 127 states and 135 transitions. Second operand 19 states. [2018-01-27 23:06:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:54,450 INFO L93 Difference]: Finished difference Result 206 states and 228 transitions. [2018-01-27 23:06:54,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 23:06:54,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 178 [2018-01-27 23:06:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:54,451 INFO L225 Difference]: With dead ends: 206 [2018-01-27 23:06:54,451 INFO L226 Difference]: Without dead ends: 143 [2018-01-27 23:06:54,452 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:06:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-27 23:06:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2018-01-27 23:06:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-01-27 23:06:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2018-01-27 23:06:54,459 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 178 [2018-01-27 23:06:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:54,459 INFO L432 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2018-01-27 23:06:54,459 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-27 23:06:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2018-01-27 23:06:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-01-27 23:06:54,461 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:54,461 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 13, 12, 12, 12, 12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:54,461 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -6713794, now seen corresponding path program 12 times [2018-01-27 23:06:54,461 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:54,462 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:54,462 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:54,463 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:54,463 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:54,505 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-01-27 23:06:55,147 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:55,148 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) [2018-01-27 23:06:55,157 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:55,178 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:55,191 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:55,196 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:55,200 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:55,206 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:55,226 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:55,253 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:55,254 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:55,258 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 302 proven. 10 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-01-27 23:06:55,340 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:55,340 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2018-01-27 23:06:55,341 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:06:55,341 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:06:55,341 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:06:55,341 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand 18 states. [2018-01-27 23:06:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:55,541 INFO L93 Difference]: Finished difference Result 223 states and 242 transitions. [2018-01-27 23:06:55,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-27 23:06:55,541 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 198 [2018-01-27 23:06:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:55,542 INFO L225 Difference]: With dead ends: 223 [2018-01-27 23:06:55,542 INFO L226 Difference]: Without dead ends: 155 [2018-01-27 23:06:55,543 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:06:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-01-27 23:06:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-01-27 23:06:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-27 23:06:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 157 transitions. [2018-01-27 23:06:55,551 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 157 transitions. Word has length 198 [2018-01-27 23:06:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:55,552 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 157 transitions. [2018-01-27 23:06:55,552 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:06:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 157 transitions. [2018-01-27 23:06:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-01-27 23:06:55,553 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:55,554 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:55,554 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash 863813443, now seen corresponding path program 13 times [2018-01-27 23:06:55,554 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:55,554 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:55,555 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:55,555 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:55,555 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:55,591 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:06:56,740 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:56,776 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 [2018-01-27 23:06:56,782 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:56,845 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:06:56,944 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:56,945 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-01-27 23:06:56,945 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-27 23:06:56,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-27 23:06:56,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-27 23:06:56,945 INFO L87 Difference]: Start difference. First operand 148 states and 157 transitions. Second operand 17 states. [2018-01-27 23:06:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:57,063 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2018-01-27 23:06:57,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:06:57,064 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 209 [2018-01-27 23:06:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:57,066 INFO L225 Difference]: With dead ends: 230 [2018-01-27 23:06:57,066 INFO L226 Difference]: Without dead ends: 156 [2018-01-27 23:06:57,067 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-27 23:06:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-27 23:06:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2018-01-27 23:06:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-01-27 23:06:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 162 transitions. [2018-01-27 23:06:57,078 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 162 transitions. Word has length 209 [2018-01-27 23:06:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:57,079 INFO L432 AbstractCegarLoop]: Abstraction has 153 states and 162 transitions. [2018-01-27 23:06:57,079 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-27 23:06:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 162 transitions. [2018-01-27 23:06:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-01-27 23:06:57,081 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:57,081 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 15, 14, 14, 14, 14, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:57,081 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2001761430, now seen corresponding path program 14 times [2018-01-27 23:06:57,081 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:57,082 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:57,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:57,083 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:57,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:57,133 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:06:57,918 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:57,918 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 [2018-01-27 23:06:57,926 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:06:57,967 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:58,015 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:58,028 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:58,039 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:06:58,211 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:58,211 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-27 23:06:58,212 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:06:58,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:06:58,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:06:58,213 INFO L87 Difference]: Start difference. First operand 153 states and 162 transitions. Second operand 18 states. [2018-01-27 23:06:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:58,336 INFO L93 Difference]: Finished difference Result 235 states and 253 transitions. [2018-01-27 23:06:58,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-27 23:06:58,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 214 [2018-01-27 23:06:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:58,340 INFO L225 Difference]: With dead ends: 235 [2018-01-27 23:06:58,340 INFO L226 Difference]: Without dead ends: 161 [2018-01-27 23:06:58,341 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:06:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-01-27 23:06:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-01-27 23:06:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-27 23:06:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2018-01-27 23:06:58,358 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 214 [2018-01-27 23:06:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:58,358 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2018-01-27 23:06:58,358 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:06:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2018-01-27 23:06:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-01-27 23:06:58,369 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:58,369 INFO L330 BasicCegarLoop]: trace histogram [18, 16, 15, 15, 15, 15, 15, 15, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:58,370 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:58,370 INFO L82 PathProgramCache]: Analyzing trace with hash 170400547, now seen corresponding path program 15 times [2018-01-27 23:06:58,370 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:58,370 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:58,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:58,371 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:58,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:58,452 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:06:59,260 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:59,260 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 [2018-01-27 23:06:59,266 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:06:59,285 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:59,291 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:59,295 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:59,301 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:59,309 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:59,311 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:59,315 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 302 proven. 24 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-01-27 23:06:59,436 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:59,436 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2018-01-27 23:06:59,437 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-27 23:06:59,437 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-27 23:06:59,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:06:59,437 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand 22 states. [2018-01-27 23:06:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:59,592 INFO L93 Difference]: Finished difference Result 250 states and 269 transitions. [2018-01-27 23:06:59,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:06:59,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 219 [2018-01-27 23:06:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:59,594 INFO L225 Difference]: With dead ends: 250 [2018-01-27 23:06:59,594 INFO L226 Difference]: Without dead ends: 176 [2018-01-27 23:06:59,595 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:06:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-01-27 23:06:59,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2018-01-27 23:06:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-01-27 23:06:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2018-01-27 23:06:59,603 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 219 [2018-01-27 23:06:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:59,603 INFO L432 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2018-01-27 23:06:59,603 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-27 23:06:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2018-01-27 23:06:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-01-27 23:06:59,605 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:59,605 INFO L330 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 16, 16, 15, 15, 15, 15, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:59,605 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash -5048082, now seen corresponding path program 16 times [2018-01-27 23:06:59,605 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:59,606 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:59,606 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:59,607 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:59,607 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:59,644 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:07:00,056 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:00,056 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 [2018-01-27 23:07:00,061 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:07:00,280 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:00,288 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:07:00,495 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:00,495 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-01-27 23:07:00,496 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-27 23:07:00,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-27 23:07:00,496 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-27 23:07:00,496 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 20 states. [2018-01-27 23:07:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:00,919 INFO L93 Difference]: Finished difference Result 257 states and 275 transitions. [2018-01-27 23:07:00,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 23:07:00,923 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 230 [2018-01-27 23:07:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:00,925 INFO L225 Difference]: With dead ends: 257 [2018-01-27 23:07:00,925 INFO L226 Difference]: Without dead ends: 177 [2018-01-27 23:07:00,925 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-27 23:07:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-01-27 23:07:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2018-01-27 23:07:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-01-27 23:07:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 183 transitions. [2018-01-27 23:07:00,933 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 183 transitions. Word has length 230 [2018-01-27 23:07:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:00,933 INFO L432 AbstractCegarLoop]: Abstraction has 174 states and 183 transitions. [2018-01-27 23:07:00,933 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-27 23:07:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 183 transitions. [2018-01-27 23:07:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-01-27 23:07:00,935 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:00,935 INFO L330 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 15, 15, 15, 15, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:00,937 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:00,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1743919749, now seen corresponding path program 17 times [2018-01-27 23:07:00,937 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:00,937 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:00,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:00,938 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:00,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:00,971 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:07:01,429 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:01,429 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 [2018-01-27 23:07:01,434 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:07:01,452 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,456 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,457 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,459 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,460 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,463 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,466 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,471 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,478 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,489 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,514 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,572 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,610 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,687 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,745 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:01,923 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:02,318 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:02,320 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:02,325 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 296 proven. 60 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2018-01-27 23:07:02,557 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:02,557 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2018-01-27 23:07:02,558 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:07:02,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:07:02,558 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:07:02,559 INFO L87 Difference]: Start difference. First operand 174 states and 183 transitions. Second operand 26 states. [2018-01-27 23:07:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:02,860 INFO L93 Difference]: Finished difference Result 270 states and 294 transitions. [2018-01-27 23:07:02,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-27 23:07:02,864 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 235 [2018-01-27 23:07:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:02,866 INFO L225 Difference]: With dead ends: 270 [2018-01-27 23:07:02,866 INFO L226 Difference]: Without dead ends: 190 [2018-01-27 23:07:02,867 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:07:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-27 23:07:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2018-01-27 23:07:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-01-27 23:07:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 194 transitions. [2018-01-27 23:07:02,875 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 194 transitions. Word has length 235 [2018-01-27 23:07:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:02,876 INFO L432 AbstractCegarLoop]: Abstraction has 184 states and 194 transitions. [2018-01-27 23:07:02,876 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:07:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 194 transitions. [2018-01-27 23:07:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-01-27 23:07:02,877 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:02,878 INFO L330 BasicCegarLoop]: trace histogram [21, 19, 18, 18, 18, 18, 18, 18, 18, 18, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:02,878 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1556418649, now seen corresponding path program 18 times [2018-01-27 23:07:02,880 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:02,880 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:02,881 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:02,881 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:02,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:02,919 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-01-27 23:07:03,927 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:03,927 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 [2018-01-27 23:07:03,935 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:07:03,960 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:03,974 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:03,993 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,007 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,013 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,018 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,029 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,051 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,112 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,264 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,375 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:04,377 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:04,383 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 420 proven. 44 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2018-01-27 23:07:05,461 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:05,461 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2018-01-27 23:07:05,462 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:07:05,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:07:05,462 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=420, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:07:05,463 INFO L87 Difference]: Start difference. First operand 184 states and 194 transitions. Second operand 26 states. [2018-01-27 23:07:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:05,588 INFO L93 Difference]: Finished difference Result 287 states and 308 transitions. [2018-01-27 23:07:05,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-27 23:07:05,593 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 255 [2018-01-27 23:07:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:05,595 INFO L225 Difference]: With dead ends: 287 [2018-01-27 23:07:05,595 INFO L226 Difference]: Without dead ends: 202 [2018-01-27 23:07:05,596 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=230, Invalid=420, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:07:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-01-27 23:07:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2018-01-27 23:07:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-01-27 23:07:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 205 transitions. [2018-01-27 23:07:05,604 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 205 transitions. Word has length 255 [2018-01-27 23:07:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:05,604 INFO L432 AbstractCegarLoop]: Abstraction has 195 states and 205 transitions. [2018-01-27 23:07:05,604 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:07:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 205 transitions. [2018-01-27 23:07:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-01-27 23:07:05,607 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:05,607 INFO L330 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 19, 19, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:05,607 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash -665663678, now seen corresponding path program 19 times [2018-01-27 23:07:05,607 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:05,607 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:05,608 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:05,608 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:05,608 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:05,645 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:07:06,753 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:06,753 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 [2018-01-27 23:07:06,758 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:06,818 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:07:06,908 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:06,908 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-01-27 23:07:06,908 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-27 23:07:06,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-27 23:07:06,909 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-27 23:07:06,909 INFO L87 Difference]: Start difference. First operand 195 states and 205 transitions. Second operand 23 states. [2018-01-27 23:07:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:07,010 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2018-01-27 23:07:07,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:07:07,010 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 266 [2018-01-27 23:07:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:07,011 INFO L225 Difference]: With dead ends: 294 [2018-01-27 23:07:07,011 INFO L226 Difference]: Without dead ends: 203 [2018-01-27 23:07:07,011 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-27 23:07:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-01-27 23:07:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2018-01-27 23:07:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-01-27 23:07:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 210 transitions. [2018-01-27 23:07:07,019 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 210 transitions. Word has length 266 [2018-01-27 23:07:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:07,019 INFO L432 AbstractCegarLoop]: Abstraction has 200 states and 210 transitions. [2018-01-27 23:07:07,019 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-27 23:07:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 210 transitions. [2018-01-27 23:07:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-01-27 23:07:07,023 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:07,023 INFO L330 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:07,023 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1444360527, now seen corresponding path program 20 times [2018-01-27 23:07:07,024 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:07,024 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:07,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:07,024 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:07,025 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:07,062 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:07:07,954 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:07,954 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 [2018-01-27 23:07:07,961 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:07:07,982 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:08,014 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:08,019 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:08,024 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:07:08,192 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:08,192 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-01-27 23:07:08,192 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-27 23:07:08,193 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-27 23:07:08,193 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-01-27 23:07:08,193 INFO L87 Difference]: Start difference. First operand 200 states and 210 transitions. Second operand 24 states. [2018-01-27 23:07:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:08,263 INFO L93 Difference]: Finished difference Result 299 states and 319 transitions. [2018-01-27 23:07:08,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-27 23:07:08,266 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 271 [2018-01-27 23:07:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:08,268 INFO L225 Difference]: With dead ends: 299 [2018-01-27 23:07:08,268 INFO L226 Difference]: Without dead ends: 208 [2018-01-27 23:07:08,269 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-01-27 23:07:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-01-27 23:07:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2018-01-27 23:07:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-01-27 23:07:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-01-27 23:07:08,276 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 271 [2018-01-27 23:07:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:08,277 INFO L432 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-01-27 23:07:08,277 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-27 23:07:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-01-27 23:07:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-01-27 23:07:08,279 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:08,279 INFO L330 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:08,279 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash -894171294, now seen corresponding path program 21 times [2018-01-27 23:07:08,280 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:08,280 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:08,280 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:08,281 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:08,281 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:08,317 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:07:08,914 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:08,914 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 [2018-01-27 23:07:08,919 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:07:08,946 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:08,957 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:08,962 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:08,968 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:08,976 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:08,986 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:09,008 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:09,010 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:09,015 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 420 proven. 70 refuted. 0 times theorem prover too weak. 1563 trivial. 0 not checked. [2018-01-27 23:07:09,157 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:09,157 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2018-01-27 23:07:09,157 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-27 23:07:09,158 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-27 23:07:09,158 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2018-01-27 23:07:09,158 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 30 states. [2018-01-27 23:07:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:09,311 INFO L93 Difference]: Finished difference Result 314 states and 335 transitions. [2018-01-27 23:07:09,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-27 23:07:09,315 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 276 [2018-01-27 23:07:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:09,317 INFO L225 Difference]: With dead ends: 314 [2018-01-27 23:07:09,318 INFO L226 Difference]: Without dead ends: 223 [2018-01-27 23:07:09,319 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2018-01-27 23:07:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-01-27 23:07:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2018-01-27 23:07:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-01-27 23:07:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 226 transitions. [2018-01-27 23:07:09,328 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 226 transitions. Word has length 276 [2018-01-27 23:07:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:09,329 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 226 transitions. [2018-01-27 23:07:09,329 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-27 23:07:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 226 transitions. [2018-01-27 23:07:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-01-27 23:07:09,331 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:09,332 INFO L330 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 18, 18, 18, 18, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:09,332 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1627269897, now seen corresponding path program 22 times [2018-01-27 23:07:09,334 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:09,334 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:09,335 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:09,335 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:09,335 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:09,374 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2192 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2018-01-27 23:07:10,102 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:10,102 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 [2018-01-27 23:07:10,108 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:07:10,802 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:10,809 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2192 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2018-01-27 23:07:10,945 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:10,946 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-01-27 23:07:10,946 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:07:10,946 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:07:10,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:07:10,947 INFO L87 Difference]: Start difference. First operand 216 states and 226 transitions. Second operand 26 states. [2018-01-27 23:07:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:11,227 INFO L93 Difference]: Finished difference Result 321 states and 341 transitions. [2018-01-27 23:07:11,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-27 23:07:11,227 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 287 [2018-01-27 23:07:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:11,228 INFO L225 Difference]: With dead ends: 321 [2018-01-27 23:07:11,228 INFO L226 Difference]: Without dead ends: 224 [2018-01-27 23:07:11,229 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:07:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-01-27 23:07:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2018-01-27 23:07:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-01-27 23:07:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 231 transitions. [2018-01-27 23:07:11,237 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 231 transitions. Word has length 287 [2018-01-27 23:07:11,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:11,238 INFO L432 AbstractCegarLoop]: Abstraction has 221 states and 231 transitions. [2018-01-27 23:07:11,238 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:07:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 231 transitions. [2018-01-27 23:07:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-01-27 23:07:11,241 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:11,241 INFO L330 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 21, 18, 18, 18, 18, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:11,241 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1473127690, now seen corresponding path program 23 times [2018-01-27 23:07:11,242 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:11,242 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:11,242 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:11,243 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:11,243 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:11,277 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2018-01-27 23:07:12,326 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:12,326 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 [2018-01-27 23:07:12,331 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:07:12,355 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,369 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,383 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,397 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,411 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,429 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,439 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,453 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,471 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,480 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,500 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,511 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,532 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,561 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,592 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,632 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,669 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:12,752 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:13,258 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:13,427 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:14,310 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:16,038 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:16,933 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:16,941 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:16,954 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 414 proven. 87 refuted. 0 times theorem prover too weak. 1803 trivial. 0 not checked. [2018-01-27 23:07:17,153 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:17,154 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2018-01-27 23:07:17,154 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-27 23:07:17,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-27 23:07:17,155 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2018-01-27 23:07:17,155 INFO L87 Difference]: Start difference. First operand 221 states and 231 transitions. Second operand 33 states. [2018-01-27 23:07:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:17,984 INFO L93 Difference]: Finished difference Result 334 states and 360 transitions. [2018-01-27 23:07:17,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-27 23:07:17,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 292 [2018-01-27 23:07:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:17,986 INFO L225 Difference]: With dead ends: 334 [2018-01-27 23:07:17,986 INFO L226 Difference]: Without dead ends: 237 [2018-01-27 23:07:17,987 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2018-01-27 23:07:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-01-27 23:07:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 231. [2018-01-27 23:07:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-01-27 23:07:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 242 transitions. [2018-01-27 23:07:17,999 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 242 transitions. Word has length 292 [2018-01-27 23:07:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:18,000 INFO L432 AbstractCegarLoop]: Abstraction has 231 states and 242 transitions. [2018-01-27 23:07:18,000 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-27 23:07:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 242 transitions. [2018-01-27 23:07:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-01-27 23:07:18,002 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:18,002 INFO L330 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 21, 21, 21, 21, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:18,002 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:18,003 INFO L82 PathProgramCache]: Analyzing trace with hash -908567874, now seen corresponding path program 24 times [2018-01-27 23:07:18,003 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:18,003 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:18,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:18,004 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:18,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:18,043 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2018-01-27 23:07:19,523 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:19,524 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 [2018-01-27 23:07:19,528 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:07:19,550 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,552 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,556 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,560 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,565 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,573 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,585 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,593 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,618 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,772 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,826 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,896 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:19,982 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:20,134 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:20,323 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:20,325 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:20,330 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 558 proven. 102 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2018-01-27 23:07:21,001 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:21,001 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2018-01-27 23:07:21,002 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-27 23:07:21,002 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-27 23:07:21,002 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2018-01-27 23:07:21,002 INFO L87 Difference]: Start difference. First operand 231 states and 242 transitions. Second operand 34 states. [2018-01-27 23:07:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:21,159 INFO L93 Difference]: Finished difference Result 351 states and 374 transitions. [2018-01-27 23:07:21,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-27 23:07:21,160 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 312 [2018-01-27 23:07:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:21,161 INFO L225 Difference]: With dead ends: 351 [2018-01-27 23:07:21,161 INFO L226 Difference]: Without dead ends: 249 [2018-01-27 23:07:21,162 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2018-01-27 23:07:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-01-27 23:07:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2018-01-27 23:07:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-01-27 23:07:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 253 transitions. [2018-01-27 23:07:21,171 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 253 transitions. Word has length 312 [2018-01-27 23:07:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:21,172 INFO L432 AbstractCegarLoop]: Abstraction has 242 states and 253 transitions. [2018-01-27 23:07:21,172 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-27 23:07:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 253 transitions. [2018-01-27 23:07:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-01-27 23:07:21,174 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:21,175 INFO L330 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 21, 21, 21, 21, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:21,175 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash 986417283, now seen corresponding path program 25 times [2018-01-27 23:07:21,175 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:21,175 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:21,176 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:21,186 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:21,186 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:21,224 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:07:22,579 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:22,579 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 [2018-01-27 23:07:22,587 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:22,656 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:07:22,818 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:22,819 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-01-27 23:07:22,819 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-27 23:07:22,819 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-27 23:07:22,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-01-27 23:07:22,820 INFO L87 Difference]: Start difference. First operand 242 states and 253 transitions. Second operand 29 states. [2018-01-27 23:07:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:22,898 INFO L93 Difference]: Finished difference Result 358 states and 380 transitions. [2018-01-27 23:07:22,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-27 23:07:22,899 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 323 [2018-01-27 23:07:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:22,901 INFO L225 Difference]: With dead ends: 358 [2018-01-27 23:07:22,901 INFO L226 Difference]: Without dead ends: 250 [2018-01-27 23:07:22,902 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-01-27 23:07:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-01-27 23:07:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2018-01-27 23:07:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-01-27 23:07:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-01-27 23:07:22,912 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 323 [2018-01-27 23:07:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:22,912 INFO L432 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-01-27 23:07:22,912 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-27 23:07:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-01-27 23:07:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-01-27 23:07:22,915 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:22,915 INFO L330 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 24, 21, 21, 21, 21, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:22,915 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:22,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1696893718, now seen corresponding path program 26 times [2018-01-27 23:07:22,915 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:22,916 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:22,916 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:22,916 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:22,917 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:22,962 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:07:23,658 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:23,658 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 [2018-01-27 23:07:23,663 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:07:23,686 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:23,725 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:23,738 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:23,743 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:07:23,955 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:23,955 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-01-27 23:07:23,956 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-27 23:07:23,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-27 23:07:23,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-01-27 23:07:23,957 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 30 states. [2018-01-27 23:07:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:24,054 INFO L93 Difference]: Finished difference Result 363 states and 385 transitions. [2018-01-27 23:07:24,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-27 23:07:24,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 328 [2018-01-27 23:07:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:24,055 INFO L225 Difference]: With dead ends: 363 [2018-01-27 23:07:24,055 INFO L226 Difference]: Without dead ends: 255 [2018-01-27 23:07:24,056 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-01-27 23:07:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-01-27 23:07:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2018-01-27 23:07:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-27 23:07:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 263 transitions. [2018-01-27 23:07:24,064 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 263 transitions. Word has length 328 [2018-01-27 23:07:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:24,065 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 263 transitions. [2018-01-27 23:07:24,065 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-27 23:07:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 263 transitions. [2018-01-27 23:07:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-01-27 23:07:24,067 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:24,067 INFO L330 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 24, 21, 21, 21, 21, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:24,068 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:24,068 INFO L82 PathProgramCache]: Analyzing trace with hash 787819619, now seen corresponding path program 27 times [2018-01-27 23:07:24,068 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:24,068 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:24,069 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:24,069 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:24,069 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:24,106 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:07:25,367 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:25,367 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 [2018-01-27 23:07:25,373 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:07:25,395 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:25,400 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:25,404 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:25,410 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:25,418 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:25,443 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:25,503 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:25,549 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:25,550 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:25,555 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 556 proven. 119 refuted. 0 times theorem prover too weak. 2468 trivial. 0 not checked. [2018-01-27 23:07:26,613 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:26,613 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2018-01-27 23:07:26,614 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-27 23:07:26,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-27 23:07:26,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=927, Unknown=0, NotChecked=0, Total=1406 [2018-01-27 23:07:26,615 INFO L87 Difference]: Start difference. First operand 252 states and 263 transitions. Second operand 38 states. [2018-01-27 23:07:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:27,038 INFO L93 Difference]: Finished difference Result 376 states and 404 transitions. [2018-01-27 23:07:27,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-27 23:07:27,038 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 333 [2018-01-27 23:07:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:27,040 INFO L225 Difference]: With dead ends: 376 [2018-01-27 23:07:27,040 INFO L226 Difference]: Without dead ends: 268 [2018-01-27 23:07:27,041 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=479, Invalid=927, Unknown=0, NotChecked=0, Total=1406 [2018-01-27 23:07:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-01-27 23:07:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 262. [2018-01-27 23:07:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-01-27 23:07:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 274 transitions. [2018-01-27 23:07:27,049 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 274 transitions. Word has length 333 [2018-01-27 23:07:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:27,050 INFO L432 AbstractCegarLoop]: Abstraction has 262 states and 274 transitions. [2018-01-27 23:07:27,050 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-27 23:07:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 274 transitions. [2018-01-27 23:07:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-01-27 23:07:27,052 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:27,052 INFO L330 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 24, 24, 24, 24, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:27,053 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:27,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1805296511, now seen corresponding path program 28 times [2018-01-27 23:07:27,053 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:27,053 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:27,054 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:27,056 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:27,056 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:27,092 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3628 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-01-27 23:07:28,156 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:28,156 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 [2018-01-27 23:07:28,162 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:07:28,606 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:28,615 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3628 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-01-27 23:07:28,834 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:28,834 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-01-27 23:07:28,835 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-27 23:07:28,835 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-27 23:07:28,835 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-01-27 23:07:28,836 INFO L87 Difference]: Start difference. First operand 262 states and 274 transitions. Second operand 32 states. [2018-01-27 23:07:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:29,059 INFO L93 Difference]: Finished difference Result 383 states and 407 transitions. [2018-01-27 23:07:29,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-27 23:07:29,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 353 [2018-01-27 23:07:29,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:29,060 INFO L225 Difference]: With dead ends: 383 [2018-01-27 23:07:29,061 INFO L226 Difference]: Without dead ends: 270 [2018-01-27 23:07:29,061 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-01-27 23:07:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-01-27 23:07:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2018-01-27 23:07:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-01-27 23:07:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 279 transitions. [2018-01-27 23:07:29,069 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 279 transitions. Word has length 353 [2018-01-27 23:07:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:29,069 INFO L432 AbstractCegarLoop]: Abstraction has 267 states and 279 transitions. [2018-01-27 23:07:29,069 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-27 23:07:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 279 transitions. [2018-01-27 23:07:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-01-27 23:07:29,072 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:29,072 INFO L330 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 27, 24, 24, 24, 24, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:29,072 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:29,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2022759726, now seen corresponding path program 29 times [2018-01-27 23:07:29,073 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:29,073 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:29,073 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:29,074 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:29,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:29,115 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3770 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-01-27 23:07:30,063 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:30,063 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 [2018-01-27 23:07:30,069 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:07:30,089 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,090 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,091 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,093 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,094 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,097 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,100 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,103 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,106 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,110 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,114 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,122 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,140 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,149 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,156 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,174 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,195 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,230 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,347 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,368 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,417 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,490 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:30,764 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:31,284 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:33,101 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:33,998 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:34,846 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command Received shutdown request... [2018-01-27 23:07:40,647 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown