java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 11:50:42,535 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 11:50:42,537 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 11:50:42,552 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 11:50:42,553 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 11:50:42,554 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 11:50:42,555 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 11:50:42,556 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 11:50:42,559 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 11:50:42,560 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 11:50:42,561 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 11:50:42,561 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 11:50:42,562 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 11:50:42,563 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 11:50:42,564 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 11:50:42,567 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 11:50:42,569 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 11:50:42,571 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 11:50:42,572 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 11:50:42,573 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 11:50:42,576 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 11:50:42,580 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 11:50:42,581 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 11:50:42,581 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ.epf [2018-01-24 11:50:42,589 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 11:50:42,589 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 11:50:42,590 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 11:50:42,590 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 11:50:42,590 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 11:50:42,591 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 11:50:42,591 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 11:50:42,591 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 11:50:42,591 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 11:50:42,591 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 11:50:42,591 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 11:50:42,592 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 11:50:42,592 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 11:50:42,592 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 11:50:42,592 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 11:50:42,592 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 11:50:42,592 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 11:50:42,592 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 11:50:42,593 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 11:50:42,593 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 11:50:42,593 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 11:50:42,593 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 11:50:42,593 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 11:50:42,593 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 11:50:42,594 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 11:50:42,594 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 11:50:42,594 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 11:50:42,594 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 11:50:42,594 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 11:50:42,594 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 11:50:42,594 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 11:50:42,595 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 11:50:42,595 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 11:50:42,595 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 11:50:42,628 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 11:50:42,638 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 11:50:42,641 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 11:50:42,642 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 11:50:42,642 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 11:50:42,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i [2018-01-24 11:50:42,756 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 11:50:42,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 11:50:42,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 11:50:42,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 11:50:42,767 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 11:50:42,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52238b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42, skipping insertion in model container [2018-01-24 11:50:42,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,785 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 11:50:42,797 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 11:50:42,912 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 11:50:42,924 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 11:50:42,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42 WrapperNode [2018-01-24 11:50:42,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 11:50:42,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 11:50:42,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 11:50:42,930 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 11:50:42,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (1/1) ... [2018-01-24 11:50:42,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 11:50:42,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 11:50:42,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 11:50:42,957 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 11:50:42,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (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 [2018-01-24 11:50:43,013 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 11:50:43,013 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 11:50:43,013 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-01-24 11:50:43,014 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 11:50:43,014 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 11:50:43,014 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-01-24 11:50:43,014 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 11:50:43,014 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 11:50:43,014 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 11:50:43,143 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 11:50:43,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:50:43 BoogieIcfgContainer [2018-01-24 11:50:43,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 11:50:43,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 11:50:43,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 11:50:43,146 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 11:50:43,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:50:42" (1/3) ... [2018-01-24 11:50:43,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2114e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:50:43, skipping insertion in model container [2018-01-24 11:50:43,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:42" (2/3) ... [2018-01-24 11:50:43,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2114e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:50:43, skipping insertion in model container [2018-01-24 11:50:43,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:50:43" (3/3) ... [2018-01-24 11:50:43,149 INFO L105 eAbstractionObserver]: Analyzing ICFG standard_strcpy_false-valid-deref_ground.i [2018-01-24 11:50:43,157 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 11:50:43,163 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-24 11:50:43,205 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 11:50:43,205 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 11:50:43,205 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 11:50:43,205 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 11:50:43,206 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 11:50:43,206 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 11:50:43,206 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 11:50:43,206 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 11:50:43,207 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 11:50:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-01-24 11:50:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 11:50:43,236 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:43,237 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:43,237 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash -42218404, now seen corresponding path program 1 times [2018-01-24 11:50:43,245 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:43,246 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:43,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:43,304 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:43,304 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:43,342 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:43,403 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:50:43,403 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 11:50:43,405 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 11:50:43,415 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 11:50:43,415 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 11:50:43,417 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2018-01-24 11:50:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:43,491 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2018-01-24 11:50:43,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 11:50:43,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 11:50:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:43,501 INFO L225 Difference]: With dead ends: 71 [2018-01-24 11:50:43,502 INFO L226 Difference]: Without dead ends: 40 [2018-01-24 11:50:43,506 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 11:50:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-24 11:50:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2018-01-24 11:50:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-24 11:50:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-01-24 11:50:43,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 7 [2018-01-24 11:50:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:43,610 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-01-24 11:50:43,611 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 11:50:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-01-24 11:50:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 11:50:43,611 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:43,611 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:43,612 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash -207595369, now seen corresponding path program 1 times [2018-01-24 11:50:43,612 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:43,612 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:43,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:43,613 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:43,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:43,623 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:43,660 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:43,660 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 [2018-01-24 11:50:43,674 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:43,691 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:43,740 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:43,741 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-01-24 11:50:43,741 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 11:50:43,741 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 11:50:43,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:50:43,742 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2018-01-24 11:50:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:43,809 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2018-01-24 11:50:43,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 11:50:43,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-01-24 11:50:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:43,811 INFO L225 Difference]: With dead ends: 57 [2018-01-24 11:50:43,811 INFO L226 Difference]: Without dead ends: 54 [2018-01-24 11:50:43,812 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:50:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-24 11:50:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2018-01-24 11:50:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-24 11:50:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-01-24 11:50:43,819 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 12 [2018-01-24 11:50:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:43,820 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-01-24 11:50:43,820 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 11:50:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-01-24 11:50:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 11:50:43,821 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:43,821 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:43,821 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash -209255178, now seen corresponding path program 1 times [2018-01-24 11:50:43,821 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:43,821 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:43,822 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:43,823 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:43,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:43,829 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:43,883 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:50:43,883 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 11:50:43,883 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 11:50:43,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 11:50:43,883 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:50:43,883 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 4 states. [2018-01-24 11:50:43,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:43,954 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2018-01-24 11:50:43,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 11:50:43,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-01-24 11:50:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:43,956 INFO L225 Difference]: With dead ends: 51 [2018-01-24 11:50:43,956 INFO L226 Difference]: Without dead ends: 36 [2018-01-24 11:50:43,956 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:50:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-24 11:50:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-24 11:50:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-24 11:50:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-24 11:50:43,962 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 12 [2018-01-24 11:50:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:43,962 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-24 11:50:43,962 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 11:50:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-24 11:50:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 11:50:43,963 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:43,963 INFO L322 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:43,964 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2132883772, now seen corresponding path program 2 times [2018-01-24 11:50:43,964 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:43,964 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:43,966 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:43,966 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:43,966 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:43,973 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,037 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:44,037 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 [2018-01-24 11:50:44,045 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:50:44,050 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:44,054 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:44,054 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:44,056 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,093 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:44,093 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-01-24 11:50:44,093 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 11:50:44,093 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 11:50:44,094 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:50:44,094 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2018-01-24 11:50:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:44,171 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2018-01-24 11:50:44,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 11:50:44,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-01-24 11:50:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:44,173 INFO L225 Difference]: With dead ends: 62 [2018-01-24 11:50:44,173 INFO L226 Difference]: Without dead ends: 59 [2018-01-24 11:50:44,174 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:50:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-24 11:50:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2018-01-24 11:50:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-24 11:50:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-24 11:50:44,181 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 17 [2018-01-24 11:50:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:44,181 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-24 11:50:44,182 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 11:50:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-24 11:50:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 11:50:44,182 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:44,183 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:44,183 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:44,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2131223963, now seen corresponding path program 1 times [2018-01-24 11:50:44,183 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:44,183 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:44,184 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:44,185 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:44,185 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:44,192 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,256 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:44,256 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 [2018-01-24 11:50:44,268 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:44,276 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 11:50:44,305 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-24 11:50:44,305 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2018-01-24 11:50:44,306 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 11:50:44,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 11:50:44,306 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:50:44,306 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2018-01-24 11:50:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:44,355 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2018-01-24 11:50:44,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 11:50:44,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-01-24 11:50:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:44,357 INFO L225 Difference]: With dead ends: 64 [2018-01-24 11:50:44,357 INFO L226 Difference]: Without dead ends: 62 [2018-01-24 11:50:44,357 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:50:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-24 11:50:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2018-01-24 11:50:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-24 11:50:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-01-24 11:50:44,364 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2018-01-24 11:50:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:44,365 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-01-24 11:50:44,365 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 11:50:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-01-24 11:50:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 11:50:44,366 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:44,366 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:44,366 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2059138999, now seen corresponding path program 3 times [2018-01-24 11:50:44,366 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:44,366 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:44,367 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:44,367 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:44,367 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:44,374 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,448 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:44,449 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:50:44,460 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:50:44,465 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:44,467 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:44,468 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:44,470 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:44,471 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:44,473 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,517 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:44,517 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-01-24 11:50:44,517 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 11:50:44,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 11:50:44,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:50:44,518 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 6 states. [2018-01-24 11:50:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:44,620 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2018-01-24 11:50:44,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 11:50:44,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-01-24 11:50:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:44,624 INFO L225 Difference]: With dead ends: 92 [2018-01-24 11:50:44,624 INFO L226 Difference]: Without dead ends: 89 [2018-01-24 11:50:44,625 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:50:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-01-24 11:50:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 50. [2018-01-24 11:50:44,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-24 11:50:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-01-24 11:50:44,633 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 22 [2018-01-24 11:50:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:44,633 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-01-24 11:50:44,633 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 11:50:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-01-24 11:50:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 11:50:44,635 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:44,635 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:44,635 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:44,635 INFO L82 PathProgramCache]: Analyzing trace with hash -6617899, now seen corresponding path program 1 times [2018-01-24 11:50:44,636 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:44,636 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:44,637 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:44,637 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:44,637 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:44,648 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,690 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:44,690 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 [2018-01-24 11:50:44,697 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:44,705 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,755 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:44,755 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-01-24 11:50:44,756 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 11:50:44,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 11:50:44,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-24 11:50:44,757 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 8 states. [2018-01-24 11:50:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:44,851 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2018-01-24 11:50:44,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 11:50:44,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-01-24 11:50:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:44,852 INFO L225 Difference]: With dead ends: 71 [2018-01-24 11:50:44,853 INFO L226 Difference]: Without dead ends: 50 [2018-01-24 11:50:44,853 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-24 11:50:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-24 11:50:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-24 11:50:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-24 11:50:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2018-01-24 11:50:44,859 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 27 [2018-01-24 11:50:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:44,860 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2018-01-24 11:50:44,860 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 11:50:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2018-01-24 11:50:44,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 11:50:44,861 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:44,861 INFO L322 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:44,861 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1173615076, now seen corresponding path program 4 times [2018-01-24 11:50:44,861 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:44,861 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:44,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:44,862 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:44,863 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:44,871 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,946 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:44,946 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 [2018-01-24 11:50:44,955 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:50:44,962 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:44,964 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:44,995 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:44,995 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-01-24 11:50:44,995 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 11:50:44,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 11:50:44,995 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 11:50:44,995 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 7 states. [2018-01-24 11:50:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:45,097 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2018-01-24 11:50:45,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 11:50:45,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-01-24 11:50:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:45,098 INFO L225 Difference]: With dead ends: 97 [2018-01-24 11:50:45,098 INFO L226 Difference]: Without dead ends: 94 [2018-01-24 11:50:45,099 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 11:50:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-01-24 11:50:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2018-01-24 11:50:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-24 11:50:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2018-01-24 11:50:45,106 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 27 [2018-01-24 11:50:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:45,106 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2018-01-24 11:50:45,106 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 11:50:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2018-01-24 11:50:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-24 11:50:45,108 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:45,108 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:45,108 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash 155329936, now seen corresponding path program 2 times [2018-01-24 11:50:45,108 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:45,108 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:45,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:45,109 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:45,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:45,118 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:45,207 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:45,208 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 [2018-01-24 11:50:45,222 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:50:45,227 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:45,243 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:45,244 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:45,246 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:45,296 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:45,297 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-24 11:50:45,297 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 11:50:45,298 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 11:50:45,298 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-01-24 11:50:45,298 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 9 states. [2018-01-24 11:50:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:45,380 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2018-01-24 11:50:45,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 11:50:45,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-01-24 11:50:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:45,382 INFO L225 Difference]: With dead ends: 72 [2018-01-24 11:50:45,383 INFO L226 Difference]: Without dead ends: 55 [2018-01-24 11:50:45,383 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-01-24 11:50:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-24 11:50:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-24 11:50:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-24 11:50:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2018-01-24 11:50:45,390 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 32 [2018-01-24 11:50:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:45,390 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2018-01-24 11:50:45,390 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 11:50:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2018-01-24 11:50:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-24 11:50:45,391 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:45,391 INFO L322 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:45,392 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:45,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1011667241, now seen corresponding path program 5 times [2018-01-24 11:50:45,392 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:45,392 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:45,393 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:45,394 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:45,394 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:45,402 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:45,474 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:45,474 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 [2018-01-24 11:50:45,482 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:50:45,486 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:45,487 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:45,488 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:45,494 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:45,503 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:45,516 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:45,529 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:45,531 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:45,578 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:45,579 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-01-24 11:50:45,579 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 11:50:45,579 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 11:50:45,579 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-24 11:50:45,579 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 8 states. [2018-01-24 11:50:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:45,699 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2018-01-24 11:50:45,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 11:50:45,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-01-24 11:50:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:45,700 INFO L225 Difference]: With dead ends: 102 [2018-01-24 11:50:45,700 INFO L226 Difference]: Without dead ends: 99 [2018-01-24 11:50:45,700 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-24 11:50:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-24 11:50:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2018-01-24 11:50:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 11:50:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2018-01-24 11:50:45,707 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 32 [2018-01-24 11:50:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:45,707 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2018-01-24 11:50:45,707 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 11:50:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2018-01-24 11:50:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-24 11:50:45,709 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:45,709 INFO L322 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:45,709 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash -903265867, now seen corresponding path program 3 times [2018-01-24 11:50:45,709 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:45,709 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:45,710 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:45,710 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:45,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:45,717 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:45,806 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:45,806 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 [2018-01-24 11:50:45,816 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:50:45,820 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:45,824 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:45,829 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:45,831 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-24 11:50:45,905 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:45,905 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3] total 10 [2018-01-24 11:50:45,905 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 11:50:45,905 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 11:50:45,905 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-01-24 11:50:45,906 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 11 states. [2018-01-24 11:50:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:46,139 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2018-01-24 11:50:46,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-24 11:50:46,139 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-01-24 11:50:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:46,140 INFO L225 Difference]: With dead ends: 97 [2018-01-24 11:50:46,140 INFO L226 Difference]: Without dead ends: 74 [2018-01-24 11:50:46,141 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-01-24 11:50:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-24 11:50:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2018-01-24 11:50:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-24 11:50:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2018-01-24 11:50:46,149 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 37 [2018-01-24 11:50:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:46,149 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2018-01-24 11:50:46,149 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 11:50:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2018-01-24 11:50:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-24 11:50:46,152 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:46,152 INFO L322 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:46,152 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:46,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2070263044, now seen corresponding path program 6 times [2018-01-24 11:50:46,152 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:46,153 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:46,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:46,154 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:46,154 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:46,162 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:46,248 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:46,248 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 [2018-01-24 11:50:46,253 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:50:46,256 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:46,257 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:46,258 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:46,259 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:46,260 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:46,261 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:46,262 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:46,262 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:46,264 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:46,296 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:46,297 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-01-24 11:50:46,297 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 11:50:46,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 11:50:46,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-01-24 11:50:46,297 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 9 states. [2018-01-24 11:50:46,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:46,407 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2018-01-24 11:50:46,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 11:50:46,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-01-24 11:50:46,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:46,409 INFO L225 Difference]: With dead ends: 155 [2018-01-24 11:50:46,409 INFO L226 Difference]: Without dead ends: 152 [2018-01-24 11:50:46,409 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-01-24 11:50:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-01-24 11:50:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 77. [2018-01-24 11:50:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-24 11:50:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-01-24 11:50:46,417 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 37 [2018-01-24 11:50:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:46,418 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-01-24 11:50:46,418 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 11:50:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-01-24 11:50:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-24 11:50:46,418 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:46,418 INFO L322 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:46,419 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:46,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1122500087, now seen corresponding path program 7 times [2018-01-24 11:50:46,419 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:46,419 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:46,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:46,420 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:46,420 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:46,426 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:46,509 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:46,510 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 [2018-01-24 11:50:46,514 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:46,522 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:46,559 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:46,560 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-01-24 11:50:46,560 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 11:50:46,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 11:50:46,560 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-01-24 11:50:46,560 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 10 states. [2018-01-24 11:50:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:46,748 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2018-01-24 11:50:46,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 11:50:46,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-01-24 11:50:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:46,750 INFO L225 Difference]: With dead ends: 185 [2018-01-24 11:50:46,750 INFO L226 Difference]: Without dead ends: 182 [2018-01-24 11:50:46,751 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-01-24 11:50:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-01-24 11:50:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 82. [2018-01-24 11:50:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-24 11:50:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2018-01-24 11:50:46,761 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 42 [2018-01-24 11:50:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:46,762 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2018-01-24 11:50:46,762 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 11:50:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2018-01-24 11:50:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-24 11:50:46,763 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:46,763 INFO L322 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:46,763 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash -676728868, now seen corresponding path program 8 times [2018-01-24 11:50:46,764 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:46,764 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:46,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:46,765 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:46,765 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:46,772 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:46,889 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:46,889 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 [2018-01-24 11:50:46,893 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:50:46,896 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:46,900 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:46,901 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:46,902 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:46,943 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:46,943 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-01-24 11:50:46,943 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 11:50:46,944 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 11:50:46,944 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-01-24 11:50:46,944 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 11 states. [2018-01-24 11:50:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:47,126 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2018-01-24 11:50:47,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 11:50:47,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-01-24 11:50:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:47,128 INFO L225 Difference]: With dead ends: 215 [2018-01-24 11:50:47,128 INFO L226 Difference]: Without dead ends: 212 [2018-01-24 11:50:47,128 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-01-24 11:50:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-01-24 11:50:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 87. [2018-01-24 11:50:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-24 11:50:47,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2018-01-24 11:50:47,139 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 47 [2018-01-24 11:50:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:47,139 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2018-01-24 11:50:47,139 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 11:50:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2018-01-24 11:50:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-24 11:50:47,140 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:47,141 INFO L322 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:47,141 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:47,141 INFO L82 PathProgramCache]: Analyzing trace with hash -633576169, now seen corresponding path program 9 times [2018-01-24 11:50:47,141 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:47,141 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:47,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:47,142 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:47,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:47,150 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:47,313 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:47,313 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:50:47,319 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:50:47,323 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,324 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,325 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,326 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,328 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,329 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,335 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,336 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,338 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,339 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:47,340 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:47,342 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:47,401 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:47,401 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-01-24 11:50:47,401 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 11:50:47,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 11:50:47,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-01-24 11:50:47,402 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 12 states. [2018-01-24 11:50:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:47,738 INFO L93 Difference]: Finished difference Result 245 states and 272 transitions. [2018-01-24 11:50:47,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 11:50:47,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-01-24 11:50:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:47,740 INFO L225 Difference]: With dead ends: 245 [2018-01-24 11:50:47,740 INFO L226 Difference]: Without dead ends: 242 [2018-01-24 11:50:47,741 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-01-24 11:50:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-01-24 11:50:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 92. [2018-01-24 11:50:47,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-24 11:50:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2018-01-24 11:50:47,754 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 52 [2018-01-24 11:50:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:47,754 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2018-01-24 11:50:47,754 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 11:50:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2018-01-24 11:50:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-24 11:50:47,755 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:47,755 INFO L322 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:47,755 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1365705540, now seen corresponding path program 10 times [2018-01-24 11:50:47,756 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:47,756 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:47,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:47,757 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:47,757 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:47,765 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:47,973 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:47,973 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 [2018-01-24 11:50:47,983 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:50:48,000 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:48,002 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:48,051 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:48,052 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-01-24 11:50:48,052 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-24 11:50:48,052 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-24 11:50:48,052 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-01-24 11:50:48,053 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 13 states. [2018-01-24 11:50:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:48,485 INFO L93 Difference]: Finished difference Result 275 states and 306 transitions. [2018-01-24 11:50:48,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-24 11:50:48,486 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-01-24 11:50:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:48,487 INFO L225 Difference]: With dead ends: 275 [2018-01-24 11:50:48,487 INFO L226 Difference]: Without dead ends: 272 [2018-01-24 11:50:48,488 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-01-24 11:50:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-01-24 11:50:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 97. [2018-01-24 11:50:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-01-24 11:50:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2018-01-24 11:50:48,501 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 57 [2018-01-24 11:50:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:48,502 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2018-01-24 11:50:48,502 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-24 11:50:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2018-01-24 11:50:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-24 11:50:48,503 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:48,503 INFO L322 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:48,503 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1933470172, now seen corresponding path program 4 times [2018-01-24 11:50:48,503 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:48,504 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:48,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:48,504 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:48,505 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:48,513 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-01-24 11:50:48,649 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:48,649 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 [2018-01-24 11:50:48,654 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:50:48,664 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:48,666 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:50:48,718 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:48,718 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2018-01-24 11:50:48,718 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-24 11:50:48,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-24 11:50:48,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-01-24 11:50:48,719 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 15 states. [2018-01-24 11:50:48,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:48,855 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2018-01-24 11:50:48,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 11:50:48,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2018-01-24 11:50:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:48,857 INFO L225 Difference]: With dead ends: 134 [2018-01-24 11:50:48,857 INFO L226 Difference]: Without dead ends: 105 [2018-01-24 11:50:48,857 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-01-24 11:50:48,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-01-24 11:50:48,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2018-01-24 11:50:48,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-24 11:50:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2018-01-24 11:50:48,865 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 62 [2018-01-24 11:50:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:48,866 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2018-01-24 11:50:48,866 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-24 11:50:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2018-01-24 11:50:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-24 11:50:48,866 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:48,866 INFO L322 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:48,866 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:48,867 INFO L82 PathProgramCache]: Analyzing trace with hash -116235209, now seen corresponding path program 11 times [2018-01-24 11:50:48,867 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:48,867 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:48,867 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:48,867 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:48,867 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:48,874 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:49,101 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:49,101 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 [2018-01-24 11:50:49,113 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:50:49,117 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,125 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,139 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,140 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,141 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,142 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,143 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,145 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,147 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,148 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,150 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,153 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:49,153 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:49,156 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:49,219 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:49,219 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-01-24 11:50:49,219 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-24 11:50:49,219 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-24 11:50:49,219 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-01-24 11:50:49,219 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 14 states. [2018-01-24 11:50:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:49,601 INFO L93 Difference]: Finished difference Result 328 states and 367 transitions. [2018-01-24 11:50:49,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-24 11:50:49,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2018-01-24 11:50:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:49,603 INFO L225 Difference]: With dead ends: 328 [2018-01-24 11:50:49,604 INFO L226 Difference]: Without dead ends: 325 [2018-01-24 11:50:49,604 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-01-24 11:50:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-01-24 11:50:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 108. [2018-01-24 11:50:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-01-24 11:50:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2018-01-24 11:50:49,620 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 62 [2018-01-24 11:50:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:49,621 INFO L432 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2018-01-24 11:50:49,621 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-24 11:50:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2018-01-24 11:50:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-24 11:50:49,622 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:49,622 INFO L322 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:49,622 INFO L371 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:49,623 INFO L82 PathProgramCache]: Analyzing trace with hash -414879332, now seen corresponding path program 12 times [2018-01-24 11:50:49,623 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:49,623 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:49,624 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:49,624 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:49,624 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:49,633 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:49,875 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:49,875 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 [2018-01-24 11:50:49,879 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:50:49,883 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,883 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,884 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,885 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,886 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,888 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,889 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,890 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,891 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,892 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,894 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,895 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:49,896 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:49,897 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:49,929 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:49,929 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-01-24 11:50:49,929 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-24 11:50:49,929 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-24 11:50:49,930 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-01-24 11:50:49,930 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand 15 states. [2018-01-24 11:50:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:50,234 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2018-01-24 11:50:50,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 11:50:50,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2018-01-24 11:50:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:50,237 INFO L225 Difference]: With dead ends: 364 [2018-01-24 11:50:50,237 INFO L226 Difference]: Without dead ends: 361 [2018-01-24 11:50:50,238 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-01-24 11:50:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-01-24 11:50:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 113. [2018-01-24 11:50:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-01-24 11:50:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2018-01-24 11:50:50,255 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 67 [2018-01-24 11:50:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:50,255 INFO L432 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2018-01-24 11:50:50,255 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-24 11:50:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2018-01-24 11:50:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-01-24 11:50:50,256 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:50,257 INFO L322 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:50,257 INFO L371 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1135871145, now seen corresponding path program 13 times [2018-01-24 11:50:50,257 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:50,257 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:50,258 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:50,258 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:50,258 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:50,267 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:50,489 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:50,490 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-01-24 11:50:50,494 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:50,505 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:50,537 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:50,538 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-01-24 11:50:50,538 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-24 11:50:50,538 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-24 11:50:50,538 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-01-24 11:50:50,538 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 16 states. [2018-01-24 11:50:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:50,918 INFO L93 Difference]: Finished difference Result 400 states and 449 transitions. [2018-01-24 11:50:50,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 11:50:50,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2018-01-24 11:50:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:50,920 INFO L225 Difference]: With dead ends: 400 [2018-01-24 11:50:50,920 INFO L226 Difference]: Without dead ends: 397 [2018-01-24 11:50:50,921 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-01-24 11:50:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-01-24 11:50:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 118. [2018-01-24 11:50:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-24 11:50:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2018-01-24 11:50:50,932 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 72 [2018-01-24 11:50:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:50,932 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2018-01-24 11:50:50,933 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-24 11:50:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2018-01-24 11:50:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-24 11:50:50,933 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:50,933 INFO L322 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:50,933 INFO L371 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1226682691, now seen corresponding path program 5 times [2018-01-24 11:50:50,934 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:50,934 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:50,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:50,934 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:50,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:50,942 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 24 proven. 89 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-24 11:50:51,097 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:51,098 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 [2018-01-24 11:50:51,102 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:50:51,105 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:51,107 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:51,109 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:51,111 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:51,113 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:51,115 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:51,116 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:51,117 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-01-24 11:50:51,182 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:51,182 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2018-01-24 11:50:51,182 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-24 11:50:51,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-24 11:50:51,183 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-01-24 11:50:51,183 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand 18 states. [2018-01-24 11:50:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:51,379 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2018-01-24 11:50:51,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-24 11:50:51,379 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-01-24 11:50:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:51,380 INFO L225 Difference]: With dead ends: 161 [2018-01-24 11:50:51,380 INFO L226 Difference]: Without dead ends: 126 [2018-01-24 11:50:51,381 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2018-01-24 11:50:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-01-24 11:50:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2018-01-24 11:50:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-24 11:50:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2018-01-24 11:50:51,397 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 77 [2018-01-24 11:50:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:51,397 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2018-01-24 11:50:51,397 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-24 11:50:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2018-01-24 11:50:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-24 11:50:51,400 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:51,400 INFO L322 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:51,401 INFO L371 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:51,401 INFO L82 PathProgramCache]: Analyzing trace with hash 571297404, now seen corresponding path program 14 times [2018-01-24 11:50:51,401 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:51,401 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:51,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:51,402 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:51,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:51,411 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:51,643 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:51,643 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 [2018-01-24 11:50:51,648 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:50:51,652 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:51,658 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:51,660 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:51,662 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:51,696 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:51,696 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-01-24 11:50:51,696 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-24 11:50:51,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-24 11:50:51,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-01-24 11:50:51,697 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 17 states. [2018-01-24 11:50:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:52,153 INFO L93 Difference]: Finished difference Result 465 states and 524 transitions. [2018-01-24 11:50:52,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-24 11:50:52,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2018-01-24 11:50:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:52,156 INFO L225 Difference]: With dead ends: 465 [2018-01-24 11:50:52,156 INFO L226 Difference]: Without dead ends: 462 [2018-01-24 11:50:52,157 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-01-24 11:50:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2018-01-24 11:50:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 129. [2018-01-24 11:50:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-01-24 11:50:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2018-01-24 11:50:52,169 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 77 [2018-01-24 11:50:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:52,170 INFO L432 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2018-01-24 11:50:52,170 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-24 11:50:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2018-01-24 11:50:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-24 11:50:52,170 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:52,170 INFO L322 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:52,170 INFO L371 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:52,171 INFO L82 PathProgramCache]: Analyzing trace with hash 239807095, now seen corresponding path program 15 times [2018-01-24 11:50:52,171 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:52,171 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:52,171 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:52,172 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:52,172 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:52,178 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:52,401 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:52,401 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 [2018-01-24 11:50:52,409 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:50:52,413 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,415 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,417 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,417 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,419 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,421 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,422 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,424 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,425 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,427 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,429 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,432 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,434 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,436 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,438 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,440 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:50:52,441 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:52,442 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:52,480 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:52,480 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-01-24 11:50:52,481 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-24 11:50:52,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-24 11:50:52,481 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-01-24 11:50:52,481 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand 18 states. [2018-01-24 11:50:52,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:52,977 INFO L93 Difference]: Finished difference Result 507 states and 572 transitions. [2018-01-24 11:50:52,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-24 11:50:52,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-01-24 11:50:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:52,981 INFO L225 Difference]: With dead ends: 507 [2018-01-24 11:50:52,981 INFO L226 Difference]: Without dead ends: 504 [2018-01-24 11:50:52,982 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-01-24 11:50:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2018-01-24 11:50:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 134. [2018-01-24 11:50:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-01-24 11:50:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2018-01-24 11:50:53,005 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 82 [2018-01-24 11:50:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:53,005 INFO L432 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2018-01-24 11:50:53,005 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-24 11:50:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2018-01-24 11:50:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-24 11:50:53,006 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:53,007 INFO L322 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:53,007 INFO L371 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1580297380, now seen corresponding path program 16 times [2018-01-24 11:50:53,007 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:53,007 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:53,008 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:53,008 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:53,008 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:53,016 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:53,617 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:53,617 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 [2018-01-24 11:50:53,624 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:50:53,639 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:53,641 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:53,677 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:53,677 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-01-24 11:50:53,677 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-24 11:50:53,677 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-24 11:50:53,677 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-01-24 11:50:53,678 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand 19 states. [2018-01-24 11:50:54,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:54,160 INFO L93 Difference]: Finished difference Result 549 states and 620 transitions. [2018-01-24 11:50:54,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-24 11:50:54,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-01-24 11:50:54,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:54,162 INFO L225 Difference]: With dead ends: 549 [2018-01-24 11:50:54,162 INFO L226 Difference]: Without dead ends: 546 [2018-01-24 11:50:54,162 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-01-24 11:50:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2018-01-24 11:50:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 139. [2018-01-24 11:50:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-01-24 11:50:54,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2018-01-24 11:50:54,178 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 87 [2018-01-24 11:50:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:54,178 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2018-01-24 11:50:54,178 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-24 11:50:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2018-01-24 11:50:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-01-24 11:50:54,179 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:54,179 INFO L322 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:54,179 INFO L371 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash 677887160, now seen corresponding path program 6 times [2018-01-24 11:50:54,179 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:54,179 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:54,180 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:54,180 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:54,180 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:54,188 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 44 proven. 124 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-24 11:50:54,376 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:54,376 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 [2018-01-24 11:50:54,381 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:50:54,385 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:54,386 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:54,388 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:54,393 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:54,396 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:54,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:54,403 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:54,404 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:54,406 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-01-24 11:50:54,506 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:54,507 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2018-01-24 11:50:54,507 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-24 11:50:54,507 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-24 11:50:54,507 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2018-01-24 11:50:54,508 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand 21 states. [2018-01-24 11:50:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:54,835 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2018-01-24 11:50:54,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-24 11:50:54,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 92 [2018-01-24 11:50:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:54,837 INFO L225 Difference]: With dead ends: 188 [2018-01-24 11:50:54,837 INFO L226 Difference]: Without dead ends: 147 [2018-01-24 11:50:54,838 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2018-01-24 11:50:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-24 11:50:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2018-01-24 11:50:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-01-24 11:50:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2018-01-24 11:50:54,855 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 92 [2018-01-24 11:50:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:54,855 INFO L432 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2018-01-24 11:50:54,855 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-24 11:50:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2018-01-24 11:50:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-01-24 11:50:54,856 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:54,856 INFO L322 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:54,856 INFO L371 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash -957222505, now seen corresponding path program 17 times [2018-01-24 11:50:54,856 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:54,857 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:54,857 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:54,858 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:54,858 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:54,866 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:55,111 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:55,111 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 [2018-01-24 11:50:55,116 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:50:55,120 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,121 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,122 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,123 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,124 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,125 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,126 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,128 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,129 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,131 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,133 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,135 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,137 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,140 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,143 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,146 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,149 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,154 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:55,154 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:55,156 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:55,196 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:55,196 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-01-24 11:50:55,197 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-24 11:50:55,197 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-24 11:50:55,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-01-24 11:50:55,197 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 20 states. [2018-01-24 11:50:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:55,746 INFO L93 Difference]: Finished difference Result 626 states and 709 transitions. [2018-01-24 11:50:55,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-24 11:50:55,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2018-01-24 11:50:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:55,749 INFO L225 Difference]: With dead ends: 626 [2018-01-24 11:50:55,749 INFO L226 Difference]: Without dead ends: 623 [2018-01-24 11:50:55,749 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-01-24 11:50:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-01-24 11:50:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 150. [2018-01-24 11:50:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-24 11:50:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2018-01-24 11:50:55,778 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 92 [2018-01-24 11:50:55,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:55,778 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2018-01-24 11:50:55,779 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-24 11:50:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2018-01-24 11:50:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-01-24 11:50:55,780 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:55,780 INFO L322 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:55,780 INFO L371 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:55,780 INFO L82 PathProgramCache]: Analyzing trace with hash 736575548, now seen corresponding path program 18 times [2018-01-24 11:50:55,780 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:55,780 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:55,781 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:55,781 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:55,781 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:55,789 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:56,072 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:56,072 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 [2018-01-24 11:50:56,078 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:50:56,081 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,082 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,083 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,083 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,084 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,085 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,086 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,087 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,088 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,089 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,091 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,092 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,094 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,095 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,097 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,098 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,101 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,103 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,105 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:50:56,106 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:56,108 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:56,150 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:56,150 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-01-24 11:50:56,151 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-24 11:50:56,151 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-24 11:50:56,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-01-24 11:50:56,151 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand 21 states. [2018-01-24 11:50:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:56,751 INFO L93 Difference]: Finished difference Result 674 states and 764 transitions. [2018-01-24 11:50:56,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-24 11:50:56,752 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2018-01-24 11:50:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:56,754 INFO L225 Difference]: With dead ends: 674 [2018-01-24 11:50:56,754 INFO L226 Difference]: Without dead ends: 671 [2018-01-24 11:50:56,755 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-01-24 11:50:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-01-24 11:50:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 155. [2018-01-24 11:50:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-01-24 11:50:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2018-01-24 11:50:56,784 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 97 [2018-01-24 11:50:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:56,785 INFO L432 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2018-01-24 11:50:56,785 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-24 11:50:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2018-01-24 11:50:56,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-01-24 11:50:56,786 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:56,786 INFO L322 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:56,786 INFO L371 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:56,786 INFO L82 PathProgramCache]: Analyzing trace with hash -891985897, now seen corresponding path program 7 times [2018-01-24 11:50:56,787 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:56,787 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:56,787 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:56,788 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:50:56,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:56,797 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 70 proven. 164 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-01-24 11:50:57,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:57,182 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 [2018-01-24 11:50:57,208 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:57,229 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-01-24 11:50:57,399 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:57,399 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2018-01-24 11:50:57,399 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-24 11:50:57,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-24 11:50:57,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2018-01-24 11:50:57,400 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand 24 states. [2018-01-24 11:50:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:57,714 INFO L93 Difference]: Finished difference Result 210 states and 239 transitions. [2018-01-24 11:50:57,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-24 11:50:57,714 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 107 [2018-01-24 11:50:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:57,715 INFO L225 Difference]: With dead ends: 210 [2018-01-24 11:50:57,715 INFO L226 Difference]: Without dead ends: 163 [2018-01-24 11:50:57,716 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2018-01-24 11:50:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-01-24 11:50:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2018-01-24 11:50:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-01-24 11:50:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 179 transitions. [2018-01-24 11:50:57,745 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 179 transitions. Word has length 107 [2018-01-24 11:50:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:57,745 INFO L432 AbstractCegarLoop]: Abstraction has 161 states and 179 transitions. [2018-01-24 11:50:57,745 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-24 11:50:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 179 transitions. [2018-01-24 11:50:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-01-24 11:50:57,746 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:57,746 INFO L322 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:57,747 INFO L371 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:57,747 INFO L82 PathProgramCache]: Analyzing trace with hash -878554953, now seen corresponding path program 19 times [2018-01-24 11:50:57,747 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:57,747 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:57,748 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:57,748 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:57,748 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:57,757 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:58,099 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:58,099 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 [2018-01-24 11:50:58,103 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:58,117 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:58,156 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:58,156 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-01-24 11:50:58,156 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-24 11:50:58,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-24 11:50:58,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-01-24 11:50:58,157 INFO L87 Difference]: Start difference. First operand 161 states and 179 transitions. Second operand 22 states. [2018-01-24 11:50:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:50:58,824 INFO L93 Difference]: Finished difference Result 757 states and 860 transitions. [2018-01-24 11:50:58,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-24 11:50:58,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2018-01-24 11:50:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:50:58,828 INFO L225 Difference]: With dead ends: 757 [2018-01-24 11:50:58,828 INFO L226 Difference]: Without dead ends: 754 [2018-01-24 11:50:58,829 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-01-24 11:50:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2018-01-24 11:50:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 166. [2018-01-24 11:50:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-01-24 11:50:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2018-01-24 11:50:58,869 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 102 [2018-01-24 11:50:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:50:58,869 INFO L432 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2018-01-24 11:50:58,869 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-24 11:50:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2018-01-24 11:50:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-01-24 11:50:58,871 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:50:58,871 INFO L322 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-01-24 11:50:58,871 INFO L371 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:50:58,871 INFO L82 PathProgramCache]: Analyzing trace with hash -399157988, now seen corresponding path program 20 times [2018-01-24 11:50:58,871 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:50:58,871 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:50:58,872 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:58,872 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:50:58,872 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:50:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:50:58,881 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:50:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:59,336 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:50:59,336 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 [2018-01-24 11:50:59,346 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:50:59,350 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:59,358 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:50:59,360 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:50:59,362 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:50:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:50:59,408 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:50:59,408 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-01-24 11:50:59,408 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-24 11:50:59,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-24 11:50:59,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-01-24 11:50:59,409 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand 23 states. [2018-01-24 11:51:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:00,167 INFO L93 Difference]: Finished difference Result 811 states and 922 transitions. [2018-01-24 11:51:00,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-24 11:51:00,168 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-01-24 11:51:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:00,170 INFO L225 Difference]: With dead ends: 811 [2018-01-24 11:51:00,170 INFO L226 Difference]: Without dead ends: 808 [2018-01-24 11:51:00,170 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-01-24 11:51:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2018-01-24 11:51:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 171. [2018-01-24 11:51:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-01-24 11:51:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2018-01-24 11:51:00,201 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 107 [2018-01-24 11:51:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:00,202 INFO L432 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2018-01-24 11:51:00,202 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-24 11:51:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2018-01-24 11:51:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-01-24 11:51:00,202 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:00,202 INFO L322 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:00,202 INFO L371 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash 792610775, now seen corresponding path program 21 times [2018-01-24 11:51:00,203 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:00,203 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:00,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:00,203 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:00,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:00,210 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:00,535 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:00,535 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 [2018-01-24 11:51:00,539 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:51:00,543 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,544 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,545 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,546 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,547 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,548 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,549 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,550 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,551 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,552 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,554 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,556 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,557 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,559 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,562 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,564 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,567 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,570 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,573 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,577 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,581 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,585 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:00,585 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:00,588 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:00,633 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:00,634 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-01-24 11:51:00,634 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-24 11:51:00,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-24 11:51:00,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-01-24 11:51:00,634 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand 24 states. [2018-01-24 11:51:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:01,515 INFO L93 Difference]: Finished difference Result 865 states and 984 transitions. [2018-01-24 11:51:01,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-24 11:51:01,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2018-01-24 11:51:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:01,518 INFO L225 Difference]: With dead ends: 865 [2018-01-24 11:51:01,518 INFO L226 Difference]: Without dead ends: 862 [2018-01-24 11:51:01,519 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-01-24 11:51:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2018-01-24 11:51:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 176. [2018-01-24 11:51:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-01-24 11:51:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2018-01-24 11:51:01,569 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 112 [2018-01-24 11:51:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:01,570 INFO L432 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2018-01-24 11:51:01,570 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-24 11:51:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2018-01-24 11:51:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-01-24 11:51:01,571 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:01,571 INFO L322 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:01,571 INFO L371 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:01,571 INFO L82 PathProgramCache]: Analyzing trace with hash -600860340, now seen corresponding path program 8 times [2018-01-24 11:51:01,572 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:01,572 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:01,572 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:01,573 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:01,573 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:01,583 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 102 proven. 209 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-01-24 11:51:01,897 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:01,897 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 [2018-01-24 11:51:01,904 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:51:01,909 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:01,920 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:01,922 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:01,925 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-01-24 11:51:02,066 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:02,066 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2018-01-24 11:51:02,066 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-24 11:51:02,066 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-24 11:51:02,066 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2018-01-24 11:51:02,067 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand 27 states. [2018-01-24 11:51:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:02,375 INFO L93 Difference]: Finished difference Result 237 states and 270 transitions. [2018-01-24 11:51:02,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-24 11:51:02,375 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2018-01-24 11:51:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:02,376 INFO L225 Difference]: With dead ends: 237 [2018-01-24 11:51:02,376 INFO L226 Difference]: Without dead ends: 184 [2018-01-24 11:51:02,376 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2018-01-24 11:51:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-01-24 11:51:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2018-01-24 11:51:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-01-24 11:51:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 203 transitions. [2018-01-24 11:51:02,410 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 203 transitions. Word has length 122 [2018-01-24 11:51:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:02,410 INFO L432 AbstractCegarLoop]: Abstraction has 182 states and 203 transitions. [2018-01-24 11:51:02,410 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-24 11:51:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 203 transitions. [2018-01-24 11:51:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-01-24 11:51:02,411 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:02,411 INFO L322 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:02,411 INFO L371 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:02,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1092014588, now seen corresponding path program 22 times [2018-01-24 11:51:02,412 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:02,412 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:02,412 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:02,413 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:02,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:02,421 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:02,739 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:02,739 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:02,743 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:51:02,768 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:02,770 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:02,828 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:02,828 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-01-24 11:51:02,828 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-24 11:51:02,829 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-24 11:51:02,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-01-24 11:51:02,829 INFO L87 Difference]: Start difference. First operand 182 states and 203 transitions. Second operand 25 states. [2018-01-24 11:51:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:03,831 INFO L93 Difference]: Finished difference Result 960 states and 1094 transitions. [2018-01-24 11:51:03,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-24 11:51:03,832 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2018-01-24 11:51:03,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:03,834 INFO L225 Difference]: With dead ends: 960 [2018-01-24 11:51:03,834 INFO L226 Difference]: Without dead ends: 957 [2018-01-24 11:51:03,835 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-01-24 11:51:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2018-01-24 11:51:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 187. [2018-01-24 11:51:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-01-24 11:51:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 209 transitions. [2018-01-24 11:51:03,886 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 209 transitions. Word has length 117 [2018-01-24 11:51:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:03,887 INFO L432 AbstractCegarLoop]: Abstraction has 187 states and 209 transitions. [2018-01-24 11:51:03,887 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-24 11:51:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 209 transitions. [2018-01-24 11:51:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-01-24 11:51:03,888 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:03,888 INFO L322 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:03,888 INFO L371 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:03,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1378342647, now seen corresponding path program 23 times [2018-01-24 11:51:03,888 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:03,888 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:03,889 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:03,889 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:03,889 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:03,897 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:04,338 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:04,338 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:04,343 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:51:04,346 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,347 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,348 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,349 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,350 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,351 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,352 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,353 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,355 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,356 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,358 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,360 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,363 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,365 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,368 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,372 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,375 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,379 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,384 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,390 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,395 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,401 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,408 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,416 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:04,417 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:04,419 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:04,472 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:04,472 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-01-24 11:51:04,473 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-24 11:51:04,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-24 11:51:04,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-01-24 11:51:04,473 INFO L87 Difference]: Start difference. First operand 187 states and 209 transitions. Second operand 26 states. [2018-01-24 11:51:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:05,542 INFO L93 Difference]: Finished difference Result 1020 states and 1163 transitions. [2018-01-24 11:51:05,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-24 11:51:05,580 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 122 [2018-01-24 11:51:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:05,583 INFO L225 Difference]: With dead ends: 1020 [2018-01-24 11:51:05,583 INFO L226 Difference]: Without dead ends: 1017 [2018-01-24 11:51:05,583 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-01-24 11:51:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2018-01-24 11:51:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 192. [2018-01-24 11:51:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-01-24 11:51:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 215 transitions. [2018-01-24 11:51:05,646 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 215 transitions. Word has length 122 [2018-01-24 11:51:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:05,646 INFO L432 AbstractCegarLoop]: Abstraction has 192 states and 215 transitions. [2018-01-24 11:51:05,646 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-24 11:51:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 215 transitions. [2018-01-24 11:51:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-01-24 11:51:05,646 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:05,647 INFO L322 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:05,647 INFO L371 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:05,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1016482084, now seen corresponding path program 24 times [2018-01-24 11:51:05,647 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:05,647 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:05,647 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:05,648 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:05,648 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:05,653 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:06,088 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:06,088 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:06,092 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:51:06,096 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,097 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,097 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,098 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,099 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,100 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,101 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,101 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,103 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,104 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,105 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,106 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,107 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,109 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,110 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,112 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,114 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,116 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,118 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,120 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,122 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,126 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,129 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,132 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,136 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:06,137 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:06,139 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:06,183 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:06,183 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-01-24 11:51:06,184 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-24 11:51:06,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-24 11:51:06,184 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-01-24 11:51:06,184 INFO L87 Difference]: Start difference. First operand 192 states and 215 transitions. Second operand 27 states. [2018-01-24 11:51:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:07,402 INFO L93 Difference]: Finished difference Result 1080 states and 1232 transitions. [2018-01-24 11:51:07,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-24 11:51:07,402 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 127 [2018-01-24 11:51:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:07,405 INFO L225 Difference]: With dead ends: 1080 [2018-01-24 11:51:07,405 INFO L226 Difference]: Without dead ends: 1077 [2018-01-24 11:51:07,406 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-01-24 11:51:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-01-24 11:51:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 197. [2018-01-24 11:51:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-01-24 11:51:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 221 transitions. [2018-01-24 11:51:07,443 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 221 transitions. Word has length 127 [2018-01-24 11:51:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:07,443 INFO L432 AbstractCegarLoop]: Abstraction has 197 states and 221 transitions. [2018-01-24 11:51:07,443 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-24 11:51:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 221 transitions. [2018-01-24 11:51:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-01-24 11:51:07,444 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:07,444 INFO L322 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:07,444 INFO L371 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash 795448555, now seen corresponding path program 9 times [2018-01-24 11:51:07,444 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:07,444 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:07,445 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:07,445 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:07,445 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:07,453 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 140 proven. 259 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-01-24 11:51:07,711 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:07,711 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:07,716 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:51:07,720 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,722 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,724 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,726 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,728 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,732 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,735 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,738 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,742 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:07,743 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:07,745 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2018-01-24 11:51:07,857 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:07,858 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2018-01-24 11:51:07,858 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-24 11:51:07,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-24 11:51:07,858 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2018-01-24 11:51:07,858 INFO L87 Difference]: Start difference. First operand 197 states and 221 transitions. Second operand 30 states. [2018-01-24 11:51:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:08,251 INFO L93 Difference]: Finished difference Result 264 states and 301 transitions. [2018-01-24 11:51:08,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-24 11:51:08,251 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 137 [2018-01-24 11:51:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:08,252 INFO L225 Difference]: With dead ends: 264 [2018-01-24 11:51:08,252 INFO L226 Difference]: Without dead ends: 205 [2018-01-24 11:51:08,253 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2018-01-24 11:51:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-01-24 11:51:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2018-01-24 11:51:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-01-24 11:51:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 227 transitions. [2018-01-24 11:51:08,286 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 227 transitions. Word has length 137 [2018-01-24 11:51:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:08,286 INFO L432 AbstractCegarLoop]: Abstraction has 203 states and 227 transitions. [2018-01-24 11:51:08,286 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-24 11:51:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 227 transitions. [2018-01-24 11:51:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-01-24 11:51:08,287 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:08,287 INFO L322 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:08,287 INFO L371 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:08,287 INFO L82 PathProgramCache]: Analyzing trace with hash 37813783, now seen corresponding path program 25 times [2018-01-24 11:51:08,288 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:08,288 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:08,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:08,288 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:08,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:08,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:08,908 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:08,908 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:08,913 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:08,929 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:08,984 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:08,984 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-01-24 11:51:08,984 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-24 11:51:08,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-24 11:51:08,984 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-01-24 11:51:08,985 INFO L87 Difference]: Start difference. First operand 203 states and 227 transitions. Second operand 28 states. [2018-01-24 11:51:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:10,370 INFO L93 Difference]: Finished difference Result 1187 states and 1356 transitions. [2018-01-24 11:51:10,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-24 11:51:10,370 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 132 [2018-01-24 11:51:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:10,375 INFO L225 Difference]: With dead ends: 1187 [2018-01-24 11:51:10,375 INFO L226 Difference]: Without dead ends: 1184 [2018-01-24 11:51:10,376 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-01-24 11:51:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2018-01-24 11:51:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 208. [2018-01-24 11:51:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-01-24 11:51:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 233 transitions. [2018-01-24 11:51:10,430 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 233 transitions. Word has length 132 [2018-01-24 11:51:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:10,431 INFO L432 AbstractCegarLoop]: Abstraction has 208 states and 233 transitions. [2018-01-24 11:51:10,431 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-24 11:51:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 233 transitions. [2018-01-24 11:51:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-01-24 11:51:10,432 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:10,432 INFO L322 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:10,432 INFO L371 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:10,432 INFO L82 PathProgramCache]: Analyzing trace with hash -24378436, now seen corresponding path program 26 times [2018-01-24 11:51:10,433 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:10,433 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:10,433 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:10,434 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:10,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:10,444 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:11,102 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:11,102 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:11,106 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:51:11,111 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:11,120 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:11,122 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:11,125 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:11,188 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:11,188 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-01-24 11:51:11,188 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-24 11:51:11,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-24 11:51:11,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-01-24 11:51:11,189 INFO L87 Difference]: Start difference. First operand 208 states and 233 transitions. Second operand 29 states. [2018-01-24 11:51:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:12,755 INFO L93 Difference]: Finished difference Result 1253 states and 1432 transitions. [2018-01-24 11:51:12,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-24 11:51:12,755 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2018-01-24 11:51:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:12,759 INFO L225 Difference]: With dead ends: 1253 [2018-01-24 11:51:12,759 INFO L226 Difference]: Without dead ends: 1250 [2018-01-24 11:51:12,759 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-01-24 11:51:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2018-01-24 11:51:12,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 213. [2018-01-24 11:51:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-01-24 11:51:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 239 transitions. [2018-01-24 11:51:12,807 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 239 transitions. Word has length 137 [2018-01-24 11:51:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:12,807 INFO L432 AbstractCegarLoop]: Abstraction has 213 states and 239 transitions. [2018-01-24 11:51:12,807 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-24 11:51:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 239 transitions. [2018-01-24 11:51:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-01-24 11:51:12,808 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:12,808 INFO L322 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:12,808 INFO L371 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1695826633, now seen corresponding path program 27 times [2018-01-24 11:51:12,808 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:12,808 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:12,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:12,809 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:12,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:12,817 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:13,332 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:13,333 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:13,338 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:51:13,342 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,344 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,344 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,345 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,346 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,347 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,348 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,349 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,351 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,352 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,354 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,356 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,358 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,360 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,363 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,366 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,369 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,372 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,377 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,381 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,385 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,389 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,394 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,400 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,406 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,412 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,418 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,425 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:51:13,426 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:13,430 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:13,520 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:13,520 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-01-24 11:51:13,520 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-24 11:51:13,520 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-24 11:51:13,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-01-24 11:51:13,521 INFO L87 Difference]: Start difference. First operand 213 states and 239 transitions. Second operand 30 states. [2018-01-24 11:51:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:15,234 INFO L93 Difference]: Finished difference Result 1319 states and 1508 transitions. [2018-01-24 11:51:15,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-24 11:51:15,235 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 142 [2018-01-24 11:51:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:15,238 INFO L225 Difference]: With dead ends: 1319 [2018-01-24 11:51:15,239 INFO L226 Difference]: Without dead ends: 1316 [2018-01-24 11:51:15,239 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-01-24 11:51:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2018-01-24 11:51:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 218. [2018-01-24 11:51:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-01-24 11:51:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 245 transitions. [2018-01-24 11:51:15,314 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 245 transitions. Word has length 142 [2018-01-24 11:51:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:15,315 INFO L432 AbstractCegarLoop]: Abstraction has 218 states and 245 transitions. [2018-01-24 11:51:15,315 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-24 11:51:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 245 transitions. [2018-01-24 11:51:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-01-24 11:51:15,316 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:15,316 INFO L322 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:15,316 INFO L371 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 152316896, now seen corresponding path program 10 times [2018-01-24 11:51:15,317 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:15,317 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:15,317 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:15,318 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:15,318 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:15,328 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 184 proven. 314 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-01-24 11:51:15,742 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:15,743 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:15,748 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:51:15,778 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:15,782 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-01-24 11:51:15,969 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:15,969 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 32 [2018-01-24 11:51:15,970 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-24 11:51:15,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-24 11:51:15,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2018-01-24 11:51:15,971 INFO L87 Difference]: Start difference. First operand 218 states and 245 transitions. Second operand 33 states. [2018-01-24 11:51:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:16,489 INFO L93 Difference]: Finished difference Result 291 states and 332 transitions. [2018-01-24 11:51:16,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-24 11:51:16,489 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 152 [2018-01-24 11:51:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:16,490 INFO L225 Difference]: With dead ends: 291 [2018-01-24 11:51:16,490 INFO L226 Difference]: Without dead ends: 226 [2018-01-24 11:51:16,491 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2018-01-24 11:51:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-01-24 11:51:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2018-01-24 11:51:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-01-24 11:51:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 251 transitions. [2018-01-24 11:51:16,548 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 251 transitions. Word has length 152 [2018-01-24 11:51:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:16,548 INFO L432 AbstractCegarLoop]: Abstraction has 224 states and 251 transitions. [2018-01-24 11:51:16,548 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-24 11:51:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 251 transitions. [2018-01-24 11:51:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-01-24 11:51:16,550 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:16,550 INFO L322 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:16,550 INFO L371 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1683732636, now seen corresponding path program 28 times [2018-01-24 11:51:16,550 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:16,551 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:16,551 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:16,551 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:16,551 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:16,560 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:17,039 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:17,039 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:17,046 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:51:17,097 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:17,100 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:17,166 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:17,166 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-01-24 11:51:17,167 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-24 11:51:17,167 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-24 11:51:17,167 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-01-24 11:51:17,168 INFO L87 Difference]: Start difference. First operand 224 states and 251 transitions. Second operand 31 states. [2018-01-24 11:51:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:19,019 INFO L93 Difference]: Finished difference Result 1438 states and 1646 transitions. [2018-01-24 11:51:19,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-24 11:51:19,019 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 147 [2018-01-24 11:51:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:19,026 INFO L225 Difference]: With dead ends: 1438 [2018-01-24 11:51:19,026 INFO L226 Difference]: Without dead ends: 1435 [2018-01-24 11:51:19,027 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-01-24 11:51:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2018-01-24 11:51:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 229. [2018-01-24 11:51:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-01-24 11:51:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 257 transitions. [2018-01-24 11:51:19,089 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 257 transitions. Word has length 147 [2018-01-24 11:51:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:19,089 INFO L432 AbstractCegarLoop]: Abstraction has 229 states and 257 transitions. [2018-01-24 11:51:19,089 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-24 11:51:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 257 transitions. [2018-01-24 11:51:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-01-24 11:51:19,090 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:19,090 INFO L322 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:19,090 INFO L371 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:19,090 INFO L82 PathProgramCache]: Analyzing trace with hash 621417559, now seen corresponding path program 29 times [2018-01-24 11:51:19,090 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:19,090 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:19,090 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:19,091 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:19,091 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:19,097 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:19,749 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:19,749 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:19,753 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:51:19,757 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,758 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,759 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,760 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,761 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,762 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,763 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,764 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,766 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,768 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,770 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,772 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,774 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,777 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,780 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,783 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,787 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,791 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,796 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,801 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,806 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,812 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,819 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,826 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,835 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,844 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,854 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,866 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,878 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,892 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:19,893 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:19,897 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:19,982 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:19,983 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-01-24 11:51:19,983 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-24 11:51:19,983 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-24 11:51:19,983 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-01-24 11:51:19,984 INFO L87 Difference]: Start difference. First operand 229 states and 257 transitions. Second operand 32 states. [2018-01-24 11:51:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:22,104 INFO L93 Difference]: Finished difference Result 1510 states and 1729 transitions. [2018-01-24 11:51:22,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-24 11:51:22,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 152 [2018-01-24 11:51:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:22,109 INFO L225 Difference]: With dead ends: 1510 [2018-01-24 11:51:22,109 INFO L226 Difference]: Without dead ends: 1507 [2018-01-24 11:51:22,110 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-01-24 11:51:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-01-24 11:51:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 234. [2018-01-24 11:51:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-01-24 11:51:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2018-01-24 11:51:22,186 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 152 [2018-01-24 11:51:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:22,187 INFO L432 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2018-01-24 11:51:22,187 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-24 11:51:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2018-01-24 11:51:22,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-01-24 11:51:22,188 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:22,188 INFO L322 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:22,188 INFO L371 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:22,188 INFO L82 PathProgramCache]: Analyzing trace with hash 691459452, now seen corresponding path program 30 times [2018-01-24 11:51:22,188 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:22,188 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:22,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:22,189 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:22,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:22,197 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:23,012 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:23,012 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:23,019 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:51:23,024 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,025 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,025 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,026 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,027 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,028 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,029 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,030 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,031 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,032 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,033 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,034 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,036 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,038 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,040 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,041 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,043 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,045 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,048 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,050 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,053 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,055 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,058 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,061 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,065 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,068 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,072 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,076 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,080 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,085 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,100 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:51:23,102 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:23,105 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:23,162 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:23,162 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-01-24 11:51:23,162 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-24 11:51:23,162 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-24 11:51:23,163 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-01-24 11:51:23,163 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand 33 states. [2018-01-24 11:51:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:25,342 INFO L93 Difference]: Finished difference Result 1582 states and 1812 transitions. [2018-01-24 11:51:25,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-24 11:51:25,343 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 157 [2018-01-24 11:51:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:25,347 INFO L225 Difference]: With dead ends: 1582 [2018-01-24 11:51:25,347 INFO L226 Difference]: Without dead ends: 1579 [2018-01-24 11:51:25,348 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-01-24 11:51:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2018-01-24 11:51:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 239. [2018-01-24 11:51:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-01-24 11:51:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 269 transitions. [2018-01-24 11:51:25,415 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 269 transitions. Word has length 157 [2018-01-24 11:51:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:25,415 INFO L432 AbstractCegarLoop]: Abstraction has 239 states and 269 transitions. [2018-01-24 11:51:25,415 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-24 11:51:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 269 transitions. [2018-01-24 11:51:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-01-24 11:51:25,417 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:25,417 INFO L322 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:25,417 INFO L371 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1037480001, now seen corresponding path program 11 times [2018-01-24 11:51:25,418 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:25,418 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:25,418 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:25,419 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:25,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:25,428 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 234 proven. 374 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-01-24 11:51:25,944 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:25,944 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:25,951 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:51:25,957 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:25,960 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:25,969 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:25,977 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:25,980 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:25,985 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:25,989 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:25,993 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:25,998 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:26,003 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:26,009 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:26,020 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:26,023 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:26,026 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2018-01-24 11:51:26,284 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:26,284 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 35 [2018-01-24 11:51:26,284 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-24 11:51:26,284 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-24 11:51:26,285 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2018-01-24 11:51:26,285 INFO L87 Difference]: Start difference. First operand 239 states and 269 transitions. Second operand 36 states. [2018-01-24 11:51:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:26,857 INFO L93 Difference]: Finished difference Result 318 states and 363 transitions. [2018-01-24 11:51:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-24 11:51:26,858 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 167 [2018-01-24 11:51:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:26,859 INFO L225 Difference]: With dead ends: 318 [2018-01-24 11:51:26,859 INFO L226 Difference]: Without dead ends: 247 [2018-01-24 11:51:26,860 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=1783, Unknown=0, NotChecked=0, Total=2070 [2018-01-24 11:51:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-01-24 11:51:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2018-01-24 11:51:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-01-24 11:51:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2018-01-24 11:51:26,934 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 167 [2018-01-24 11:51:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:26,934 INFO L432 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2018-01-24 11:51:26,934 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-24 11:51:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2018-01-24 11:51:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-01-24 11:51:26,935 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:26,935 INFO L322 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:26,935 INFO L371 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:26,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1996358519, now seen corresponding path program 31 times [2018-01-24 11:51:26,935 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:26,935 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:26,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:26,936 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:51:26,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:26,944 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:27,522 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:27,523 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:27,529 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:27,555 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:27,644 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:27,644 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-01-24 11:51:27,644 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-24 11:51:27,644 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-24 11:51:27,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-01-24 11:51:27,645 INFO L87 Difference]: Start difference. First operand 245 states and 275 transitions. Second operand 34 states. [2018-01-24 11:51:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:51:29,992 INFO L93 Difference]: Finished difference Result 1713 states and 1964 transitions. [2018-01-24 11:51:29,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-24 11:51:29,993 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2018-01-24 11:51:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:51:29,997 INFO L225 Difference]: With dead ends: 1713 [2018-01-24 11:51:29,997 INFO L226 Difference]: Without dead ends: 1710 [2018-01-24 11:51:29,998 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-01-24 11:51:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2018-01-24 11:51:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 250. [2018-01-24 11:51:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-01-24 11:51:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2018-01-24 11:51:30,067 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 162 [2018-01-24 11:51:30,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:51:30,067 INFO L432 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2018-01-24 11:51:30,067 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-24 11:51:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2018-01-24 11:51:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-01-24 11:51:30,068 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:51:30,068 INFO L322 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-01-24 11:51:30,068 INFO L371 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-01-24 11:51:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash 603675228, now seen corresponding path program 32 times [2018-01-24 11:51:30,068 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:51:30,068 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:51:30,069 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:30,069 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:51:30,069 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:51:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:51:30,075 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:51:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:30,639 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:51:30,639 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:51:30,644 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:51:30,649 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:30,669 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:51:30,671 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:51:30,674 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:51:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:51:30,733 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:51:30,733 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-01-24 11:51:30,734 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states Received shutdown request... [2018-01-24 11:51:30,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-24 11:51:30,734 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-01-24 11:51:30,734 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand 35 states. [2018-01-24 11:51:30,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 11:51:30,735 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-24 11:51:30,740 WARN L187 ceAbstractionStarter]: Timeout [2018-01-24 11:51:30,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 11:51:30 BoogieIcfgContainer [2018-01-24 11:51:30,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 11:51:30,741 INFO L168 Benchmark]: Toolchain (without parser) took 47984.17 ms. Allocated memory was 303.6 MB in the beginning and 781.2 MB in the end (delta: 477.6 MB). Free memory was 264.5 MB in the beginning and 418.7 MB in the end (delta: -154.3 MB). Peak memory consumption was 323.4 MB. Max. memory is 5.3 GB. [2018-01-24 11:51:30,743 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 303.6 MB. Free memory is still 268.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 11:51:30,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.40 ms. Allocated memory is still 303.6 MB. Free memory was 262.5 MB in the beginning and 254.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-24 11:51:30,743 INFO L168 Benchmark]: Boogie Preprocessor took 26.45 ms. Allocated memory is still 303.6 MB. Free memory is still 254.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 11:51:30,743 INFO L168 Benchmark]: RCFGBuilder took 187.55 ms. Allocated memory is still 303.6 MB. Free memory was 254.5 MB in the beginning and 241.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 5.3 GB. [2018-01-24 11:51:30,744 INFO L168 Benchmark]: TraceAbstraction took 47595.85 ms. Allocated memory was 303.6 MB in the beginning and 781.2 MB in the end (delta: 477.6 MB). Free memory was 241.5 MB in the beginning and 418.7 MB in the end (delta: -177.2 MB). Peak memory consumption was 300.4 MB. Max. memory is 5.3 GB. [2018-01-24 11:51:30,746 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 303.6 MB. Free memory is still 268.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 167.40 ms. Allocated memory is still 303.6 MB. Free memory was 262.5 MB in the beginning and 254.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.45 ms. Allocated memory is still 303.6 MB. Free memory is still 254.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * RCFGBuilder took 187.55 ms. Allocated memory is still 303.6 MB. Free memory was 254.5 MB in the beginning and 241.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 47595.85 ms. Allocated memory was 303.6 MB in the beginning and 781.2 MB in the end (delta: 477.6 MB). Free memory was 241.5 MB in the beginning and 418.7 MB in the end (delta: -177.2 MB). Peak memory consumption was 300.4 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 7). Cancelled while BasicCegarLoop was constructing difference of abstraction (250states) and interpolant automaton (currently 2 states, 35 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was constructing difference of abstraction (250states) and interpolant automaton (currently 2 states, 35 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was constructing difference of abstraction (250states) and interpolant automaton (currently 2 states, 35 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was constructing difference of abstraction (250states) and interpolant automaton (currently 2 states, 35 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was constructing difference of abstraction (250states) and interpolant automaton (currently 2 states, 35 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 5 error locations. TIMEOUT Result, 47.5s OverallTime, 46 OverallIterations, 33 TraceHistogramMax, 27.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5562 SDtfs, 3614 SDslu, 99030 SDs, 0 SdLazy, 50949 SolverSat, 315 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4672 GetRequests, 3799 SyntacticMatches, 41 SemanticMatches, 832 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 11.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=250occurred in iteration=45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 45 MinimizatonAttempts, 16441 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 7805 NumberOfCodeBlocks, 7790 NumberOfCodeBlocksAsserted, 386 NumberOfCheckSat, 7715 ConstructedInterpolants, 0 QuantifiedInterpolants, 5000319 SizeOfPredicates, 3 NumberOfNonLiveVariables, 5669 ConjunctsInSsa, 1300 ConjunctsInUnsatCore, 90 InterpolantComputations, 3 PerfectInterpolantSequences, 3413/62884 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_11-51-30-753.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_11-51-30-753.csv Completed graceful shutdown