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/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/memsafety/960521-1_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-a74eeac-m [2018-02-02 18:31:29,300 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 18:31:29,302 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 18:31:29,311 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 18:31:29,311 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 18:31:29,312 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 18:31:29,312 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 18:31:29,313 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 18:31:29,315 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 18:31:29,315 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 18:31:29,316 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 18:31:29,316 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 18:31:29,317 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 18:31:29,318 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 18:31:29,319 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 18:31:29,320 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 18:31:29,322 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 18:31:29,323 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 18:31:29,324 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 18:31:29,325 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 18:31:29,327 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 18:31:29,331 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 18:31:29,331 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 18:31:29,331 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-02 18:31:29,341 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 18:31:29,341 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 18:31:29,342 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 18:31:29,342 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 18:31:29,342 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 18:31:29,343 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 18:31:29,343 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 18:31:29,343 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 18:31:29,343 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 18:31:29,343 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 18:31:29,343 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 18:31:29,343 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 18:31:29,344 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 18:31:29,344 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 18:31:29,344 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 18:31:29,344 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 18:31:29,344 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 18:31:29,344 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 18:31:29,344 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 18:31:29,345 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 18:31:29,345 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 18:31:29,345 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 18:31:29,345 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 18:31:29,345 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 18:31:29,345 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 18:31:29,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 18:31:29,393 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 18:31:29,396 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 18:31:29,397 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 18:31:29,397 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 18:31:29,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1_false-valid-deref.i [2018-02-02 18:31:29,515 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 18:31:29,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 18:31:29,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 18:31:29,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 18:31:29,522 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 18:31:29,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32677a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29, skipping insertion in model container [2018-02-02 18:31:29,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,538 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:31:29,566 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:31:29,653 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:31:29,667 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:31:29,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29 WrapperNode [2018-02-02 18:31:29,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 18:31:29,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 18:31:29,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 18:31:29,674 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 18:31:29,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (1/1) ... [2018-02-02 18:31:29,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 18:31:29,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 18:31:29,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 18:31:29,705 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 18:31:29,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:29,750 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 18:31:29,751 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 18:31:29,751 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-02-02 18:31:29,751 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 18:31:29,751 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 18:31:29,751 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 18:31:29,751 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 18:31:29,752 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 18:31:29,752 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 18:31:29,752 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-02-02 18:31:29,752 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-02-02 18:31:29,752 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-02-02 18:31:29,752 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 18:31:29,752 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 18:31:29,752 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 18:31:29,917 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 18:31:29,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:31:29 BoogieIcfgContainer [2018-02-02 18:31:29,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 18:31:29,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 18:31:29,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 18:31:29,921 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 18:31:29,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 06:31:29" (1/3) ... [2018-02-02 18:31:29,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12696471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:31:29, skipping insertion in model container [2018-02-02 18:31:29,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:31:29" (2/3) ... [2018-02-02 18:31:29,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12696471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:31:29, skipping insertion in model container [2018-02-02 18:31:29,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:31:29" (3/3) ... [2018-02-02 18:31:29,923 INFO L107 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-deref.i [2018-02-02 18:31:29,928 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 18:31:29,932 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2018-02-02 18:31:29,961 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 18:31:29,961 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 18:31:29,961 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 18:31:29,961 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 18:31:29,962 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 18:31:29,962 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 18:31:29,962 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 18:31:29,962 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 18:31:29,962 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 18:31:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2018-02-02 18:31:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-02-02 18:31:29,978 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:29,978 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:29,979 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1993989713, now seen corresponding path program 1 times [2018-02-02 18:31:29,985 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:29,985 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:30,014 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,015 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:30,015 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:30,064 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:30,131 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:31:30,132 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 18:31:30,133 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:31:30,140 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:31:30,141 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:31:30,142 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 4 states. [2018-02-02 18:31:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:30,246 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-02-02 18:31:30,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 18:31:30,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-02-02 18:31:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:30,294 INFO L225 Difference]: With dead ends: 52 [2018-02-02 18:31:30,294 INFO L226 Difference]: Without dead ends: 49 [2018-02-02 18:31:30,296 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:31:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-02 18:31:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-02-02 18:31:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-02-02 18:31:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-02-02 18:31:30,318 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 11 [2018-02-02 18:31:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:30,319 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-02-02 18:31:30,319 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:31:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-02-02 18:31:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-02-02 18:31:30,319 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:30,319 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:30,319 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1993989714, now seen corresponding path program 1 times [2018-02-02 18:31:30,320 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:30,320 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:30,321 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,321 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:30,321 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:30,337 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:30,399 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:31:30,399 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 18:31:30,401 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 18:31:30,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 18:31:30,401 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:31:30,401 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 5 states. [2018-02-02 18:31:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:30,460 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-02-02 18:31:30,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:31:30,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-02-02 18:31:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:30,461 INFO L225 Difference]: With dead ends: 48 [2018-02-02 18:31:30,462 INFO L226 Difference]: Without dead ends: 48 [2018-02-02 18:31:30,462 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:31:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-02-02 18:31:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-02-02 18:31:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-02-02 18:31:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-02-02 18:31:30,466 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 11 [2018-02-02 18:31:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:30,467 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-02-02 18:31:30,467 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 18:31:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-02-02 18:31:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 18:31:30,467 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:30,467 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:30,467 INFO L371 AbstractCegarLoop]: === Iteration 3 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:30,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1188525484, now seen corresponding path program 1 times [2018-02-02 18:31:30,468 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:30,468 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:30,469 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,469 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:30,469 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:30,485 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:30,536 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:31:30,536 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-02 18:31:30,536 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-02 18:31:30,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-02 18:31:30,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-02-02 18:31:30,536 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 6 states. [2018-02-02 18:31:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:30,591 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-02-02 18:31:30,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:31:30,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-02-02 18:31:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:30,595 INFO L225 Difference]: With dead ends: 45 [2018-02-02 18:31:30,596 INFO L226 Difference]: Without dead ends: 45 [2018-02-02 18:31:30,596 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:31:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-02-02 18:31:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-02-02 18:31:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-02-02 18:31:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-02-02 18:31:30,600 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 17 [2018-02-02 18:31:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:30,600 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-02-02 18:31:30,600 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-02 18:31:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-02-02 18:31:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 18:31:30,601 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:30,601 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:30,601 INFO L371 AbstractCegarLoop]: === Iteration 4 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:30,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1188525483, now seen corresponding path program 1 times [2018-02-02 18:31:30,601 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:30,601 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:30,602 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,603 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:30,603 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:30,615 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:30,710 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:31:30,710 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-02-02 18:31:30,711 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-02 18:31:30,711 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-02 18:31:30,711 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:31:30,711 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 7 states. [2018-02-02 18:31:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:30,785 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-02-02 18:31:30,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-02 18:31:30,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-02-02 18:31:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:30,787 INFO L225 Difference]: With dead ends: 53 [2018-02-02 18:31:30,787 INFO L226 Difference]: Without dead ends: 53 [2018-02-02 18:31:30,787 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-02-02 18:31:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-02-02 18:31:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2018-02-02 18:31:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-02-02 18:31:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-02-02 18:31:30,791 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 17 [2018-02-02 18:31:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:30,791 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-02-02 18:31:30,791 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-02 18:31:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-02-02 18:31:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-02-02 18:31:30,792 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:30,792 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:30,792 INFO L371 AbstractCegarLoop]: === Iteration 5 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2106816852, now seen corresponding path program 1 times [2018-02-02 18:31:30,792 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:30,792 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:30,793 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,793 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:30,793 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:30,806 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:30,925 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:30,925 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:30,933 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:30,961 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:30,991 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-02-02 18:31:30,992 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:30,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:31:30,997 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2018-02-02 18:31:31,008 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-02-02 18:31:31,008 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:31,016 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-02-02 18:31:31,016 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:21 [2018-02-02 18:31:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:31,111 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:31,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-02-02 18:31:31,112 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-02 18:31:31,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-02 18:31:31,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-02-02 18:31:31,112 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 12 states. [2018-02-02 18:31:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:31,328 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-02-02 18:31:31,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-02 18:31:31,329 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-02-02 18:31:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:31,330 INFO L225 Difference]: With dead ends: 63 [2018-02-02 18:31:31,330 INFO L226 Difference]: Without dead ends: 63 [2018-02-02 18:31:31,330 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:31:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-02-02 18:31:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2018-02-02 18:31:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-02-02 18:31:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-02-02 18:31:31,334 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 21 [2018-02-02 18:31:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:31,334 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-02-02 18:31:31,334 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-02 18:31:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-02-02 18:31:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-02-02 18:31:31,334 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:31,334 INFO L351 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:31,335 INFO L371 AbstractCegarLoop]: === Iteration 6 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:31,335 INFO L82 PathProgramCache]: Analyzing trace with hash -702775421, now seen corresponding path program 2 times [2018-02-02 18:31:31,335 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:31,335 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:31,335 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:31,335 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:31,335 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:31,346 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:31,480 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:31,480 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:31,488 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:31:31,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:31:31,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:31,512 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:31,515 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-02-02 18:31:31,516 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:31,524 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-02-02 18:31:31,525 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:31,529 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:31:31,529 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2018-02-02 18:31:31,550 INFO L700 Elim1Store]: detected not equals via solver [2018-02-02 18:31:31,551 INFO L700 Elim1Store]: detected not equals via solver [2018-02-02 18:31:31,553 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-02-02 18:31:31,553 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:31,559 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-02-02 18:31:31,560 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:31,565 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-02-02 18:31:31,566 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:25 [2018-02-02 18:31:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:31,691 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:31,691 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-02-02 18:31:31,691 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-02-02 18:31:31,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-02-02 18:31:31,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-02-02 18:31:31,692 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 17 states. [2018-02-02 18:31:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:32,078 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2018-02-02 18:31:32,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-02 18:31:32,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2018-02-02 18:31:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:32,080 INFO L225 Difference]: With dead ends: 73 [2018-02-02 18:31:32,080 INFO L226 Difference]: Without dead ends: 73 [2018-02-02 18:31:32,080 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2018-02-02 18:31:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-02-02 18:31:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2018-02-02 18:31:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-02-02 18:31:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2018-02-02 18:31:32,086 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 25 [2018-02-02 18:31:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:32,086 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2018-02-02 18:31:32,086 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-02-02 18:31:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2018-02-02 18:31:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-02-02 18:31:32,087 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:32,087 INFO L351 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:32,087 INFO L371 AbstractCegarLoop]: === Iteration 7 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1827026138, now seen corresponding path program 3 times [2018-02-02 18:31:32,087 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:32,087 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:32,088 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:32,088 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:32,088 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:32,101 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:32,266 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:32,266 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:32,271 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:31:32,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-02-02 18:31:32,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:32,289 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:32,292 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-02-02 18:31:32,292 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:32,296 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-02-02 18:31:32,296 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:32,299 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:31:32,299 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:16 [2018-02-02 18:31:32,319 INFO L700 Elim1Store]: detected not equals via solver [2018-02-02 18:31:32,320 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-02-02 18:31:32,320 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:32,340 INFO L700 Elim1Store]: detected not equals via solver [2018-02-02 18:31:32,340 INFO L700 Elim1Store]: detected not equals via solver [2018-02-02 18:31:32,341 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-02-02 18:31:32,341 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:32,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:31:32,355 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2018-02-02 18:31:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-02-02 18:31:32,515 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:32,516 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2018-02-02 18:31:32,516 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-02-02 18:31:32,516 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-02-02 18:31:32,516 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-02-02 18:31:32,517 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 18 states. [2018-02-02 18:31:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:32,987 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-02-02 18:31:32,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-02 18:31:32,987 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2018-02-02 18:31:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:32,989 INFO L225 Difference]: With dead ends: 90 [2018-02-02 18:31:32,989 INFO L226 Difference]: Without dead ends: 90 [2018-02-02 18:31:32,990 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2018-02-02 18:31:32,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-02-02 18:31:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2018-02-02 18:31:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-02-02 18:31:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-02-02 18:31:32,994 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 29 [2018-02-02 18:31:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:32,994 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-02-02 18:31:32,994 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-02-02 18:31:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-02-02 18:31:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-02-02 18:31:32,995 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:32,995 INFO L351 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:32,995 INFO L371 AbstractCegarLoop]: === Iteration 8 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:32,996 INFO L82 PathProgramCache]: Analyzing trace with hash -645884181, now seen corresponding path program 1 times [2018-02-02 18:31:32,996 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:32,996 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:32,996 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:32,997 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:32,997 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:33,005 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:33,049 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:33,049 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:33,056 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:33,074 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:33,173 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:33,173 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-02-02 18:31:33,174 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-02 18:31:33,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-02 18:31:33,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:31:33,174 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 15 states. [2018-02-02 18:31:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:33,266 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-02-02 18:31:33,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-02 18:31:33,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-02-02 18:31:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:33,269 INFO L225 Difference]: With dead ends: 102 [2018-02-02 18:31:33,269 INFO L226 Difference]: Without dead ends: 102 [2018-02-02 18:31:33,270 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:31:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-02-02 18:31:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2018-02-02 18:31:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-02-02 18:31:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2018-02-02 18:31:33,275 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 40 [2018-02-02 18:31:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:33,275 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2018-02-02 18:31:33,275 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-02 18:31:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2018-02-02 18:31:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-02-02 18:31:33,276 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:33,276 INFO L351 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:33,276 INFO L371 AbstractCegarLoop]: === Iteration 9 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:33,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2113361740, now seen corresponding path program 2 times [2018-02-02 18:31:33,276 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:33,276 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:33,277 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:33,277 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:33,277 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:33,290 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:33,398 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:33,398 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:33,410 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:31:33,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-02-02 18:31:33,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:33,428 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:33,431 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-02-02 18:31:33,432 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:33,436 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-02-02 18:31:33,437 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2018-02-02 18:31:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-02-02 18:31:33,553 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-02-02 18:31:33,554 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2018-02-02 18:31:33,554 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-02 18:31:33,554 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-02 18:31:33,554 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:31:33,554 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 15 states. [2018-02-02 18:31:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:34,031 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2018-02-02 18:31:34,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-02-02 18:31:34,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2018-02-02 18:31:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:34,034 INFO L225 Difference]: With dead ends: 94 [2018-02-02 18:31:34,034 INFO L226 Difference]: Without dead ends: 94 [2018-02-02 18:31:34,035 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2018-02-02 18:31:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-02-02 18:31:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2018-02-02 18:31:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-02-02 18:31:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-02-02 18:31:34,039 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 44 [2018-02-02 18:31:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:34,040 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-02-02 18:31:34,040 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-02 18:31:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-02-02 18:31:34,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-02-02 18:31:34,041 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:34,041 INFO L351 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:34,041 INFO L371 AbstractCegarLoop]: === Iteration 10 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1590645252, now seen corresponding path program 1 times [2018-02-02 18:31:34,041 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:34,041 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:34,042 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:34,042 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:34,042 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:34,051 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-02-02 18:31:34,077 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:31:34,077 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 18:31:34,077 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:31:34,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:31:34,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:31:34,078 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 4 states. [2018-02-02 18:31:34,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:34,093 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-02-02 18:31:34,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:31:34,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2018-02-02 18:31:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:34,094 INFO L225 Difference]: With dead ends: 75 [2018-02-02 18:31:34,095 INFO L226 Difference]: Without dead ends: 75 [2018-02-02 18:31:34,095 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:31:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-02-02 18:31:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-02-02 18:31:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-02-02 18:31:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-02-02 18:31:34,098 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 48 [2018-02-02 18:31:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:34,099 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-02-02 18:31:34,099 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:31:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-02-02 18:31:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-02-02 18:31:34,100 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:34,100 INFO L351 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:34,100 INFO L371 AbstractCegarLoop]: === Iteration 11 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1106929516, now seen corresponding path program 1 times [2018-02-02 18:31:34,100 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:34,100 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:34,101 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:34,101 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:34,101 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:34,113 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-02-02 18:31:34,229 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:34,229 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:34,237 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:34,271 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-02-02 18:31:34,343 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:34,343 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-02-02 18:31:34,344 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-02-02 18:31:34,344 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-02-02 18:31:34,344 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2018-02-02 18:31:34,344 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states. [2018-02-02 18:31:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:34,436 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-02-02 18:31:34,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 18:31:34,437 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-02-02 18:31:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:34,437 INFO L225 Difference]: With dead ends: 91 [2018-02-02 18:31:34,437 INFO L226 Difference]: Without dead ends: 91 [2018-02-02 18:31:34,438 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2018-02-02 18:31:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-02-02 18:31:34,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-02-02 18:31:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-02-02 18:31:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-02-02 18:31:34,440 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 74 [2018-02-02 18:31:34,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:34,440 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-02-02 18:31:34,440 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-02-02 18:31:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-02-02 18:31:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-02-02 18:31:34,441 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:34,441 INFO L351 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:34,441 INFO L371 AbstractCegarLoop]: === Iteration 12 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:34,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2069780427, now seen corresponding path program 2 times [2018-02-02 18:31:34,441 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:34,441 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:34,442 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:34,442 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:34,442 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:34,455 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-02-02 18:31:34,549 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:34,549 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:34,557 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:31:34,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:31:34,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:34,591 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-02-02 18:31:34,720 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:34,720 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2018-02-02 18:31:34,720 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-02-02 18:31:34,721 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-02-02 18:31:34,721 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2018-02-02 18:31:34,721 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 22 states. [2018-02-02 18:31:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:34,836 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-02-02 18:31:34,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-02-02 18:31:34,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2018-02-02 18:31:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:34,838 INFO L225 Difference]: With dead ends: 99 [2018-02-02 18:31:34,838 INFO L226 Difference]: Without dead ends: 99 [2018-02-02 18:31:34,838 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2018-02-02 18:31:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-02-02 18:31:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-02-02 18:31:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-02-02 18:31:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-02-02 18:31:34,844 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 86 [2018-02-02 18:31:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:34,844 INFO L432 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-02-02 18:31:34,844 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-02-02 18:31:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-02-02 18:31:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-02-02 18:31:34,845 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:34,845 INFO L351 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:34,845 INFO L371 AbstractCegarLoop]: === Iteration 13 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:34,845 INFO L82 PathProgramCache]: Analyzing trace with hash 67534827, now seen corresponding path program 3 times [2018-02-02 18:31:34,845 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:34,845 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:34,846 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:34,846 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:34,846 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:34,861 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-02-02 18:31:34,970 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:34,970 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:34,978 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:31:35,115 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-02-02 18:31:35,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:35,119 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-02-02 18:31:35,155 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:35,155 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2018-02-02 18:31:35,156 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-02 18:31:35,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-02 18:31:35,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:31:35,156 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 15 states. [2018-02-02 18:31:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:35,282 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-02-02 18:31:35,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-02 18:31:35,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2018-02-02 18:31:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:35,283 INFO L225 Difference]: With dead ends: 107 [2018-02-02 18:31:35,283 INFO L226 Difference]: Without dead ends: 107 [2018-02-02 18:31:35,284 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2018-02-02 18:31:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-02-02 18:31:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-02-02 18:31:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-02-02 18:31:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-02-02 18:31:35,286 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 94 [2018-02-02 18:31:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:35,286 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-02-02 18:31:35,286 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-02 18:31:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-02-02 18:31:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-02-02 18:31:35,287 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:35,287 INFO L351 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:35,287 INFO L371 AbstractCegarLoop]: === Iteration 14 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash 306183947, now seen corresponding path program 4 times [2018-02-02 18:31:35,287 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:35,287 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:35,287 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:35,287 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:35,288 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:35,300 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-02-02 18:31:35,423 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:35,423 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:35,430 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:31:35,455 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:31:35,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:35,458 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:35,463 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-02-02 18:31:35,463 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:31:35,464 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:31:35,464 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:7 [2018-02-02 18:31:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 200 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:35,819 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:35,820 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27] total 40 [2018-02-02 18:31:35,820 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-02-02 18:31:35,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-02-02 18:31:35,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1220, Unknown=0, NotChecked=0, Total=1560 [2018-02-02 18:31:35,821 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 40 states. [2018-02-02 18:31:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:36,139 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-02-02 18:31:36,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-02 18:31:36,140 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 102 [2018-02-02 18:31:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:36,140 INFO L225 Difference]: With dead ends: 115 [2018-02-02 18:31:36,140 INFO L226 Difference]: Without dead ends: 115 [2018-02-02 18:31:36,141 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=613, Invalid=2467, Unknown=0, NotChecked=0, Total=3080 [2018-02-02 18:31:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-02-02 18:31:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-02-02 18:31:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-02-02 18:31:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-02-02 18:31:36,143 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 102 [2018-02-02 18:31:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:36,143 INFO L432 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-02-02 18:31:36,143 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-02-02 18:31:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-02-02 18:31:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-02-02 18:31:36,144 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:36,144 INFO L351 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:36,144 INFO L371 AbstractCegarLoop]: === Iteration 15 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2043652821, now seen corresponding path program 5 times [2018-02-02 18:31:36,144 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:36,144 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:36,145 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:36,145 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:36,145 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:36,155 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-02-02 18:31:36,254 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:36,254 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:36,259 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:31:36,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-02-02 18:31:36,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:36,385 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-02-02 18:31:36,413 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:36,413 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2018-02-02 18:31:36,413 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-02-02 18:31:36,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-02-02 18:31:36,413 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-02-02 18:31:36,413 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 17 states. [2018-02-02 18:31:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:36,542 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-02-02 18:31:36,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-02-02 18:31:36,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2018-02-02 18:31:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:36,543 INFO L225 Difference]: With dead ends: 123 [2018-02-02 18:31:36,543 INFO L226 Difference]: Without dead ends: 123 [2018-02-02 18:31:36,543 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2018-02-02 18:31:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-02-02 18:31:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-02-02 18:31:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-02-02 18:31:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-02-02 18:31:36,546 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 110 [2018-02-02 18:31:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:36,547 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-02-02 18:31:36,547 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-02-02 18:31:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-02-02 18:31:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-02-02 18:31:36,548 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:36,548 INFO L351 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:36,549 INFO L371 AbstractCegarLoop]: === Iteration 16 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash -130219445, now seen corresponding path program 6 times [2018-02-02 18:31:36,549 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:36,549 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:36,549 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:36,549 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:36,549 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:36,564 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-02-02 18:31:36,722 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:36,722 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:36,727 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:31:37,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-02-02 18:31:37,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:37,470 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 414 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-02-02 18:31:37,529 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:37,530 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 22 [2018-02-02 18:31:37,530 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-02-02 18:31:37,530 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-02-02 18:31:37,530 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2018-02-02 18:31:37,530 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 22 states. [2018-02-02 18:31:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:37,726 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2018-02-02 18:31:37,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-02-02 18:31:37,726 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 118 [2018-02-02 18:31:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:37,726 INFO L225 Difference]: With dead ends: 131 [2018-02-02 18:31:37,727 INFO L226 Difference]: Without dead ends: 131 [2018-02-02 18:31:37,727 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=373, Invalid=959, Unknown=0, NotChecked=0, Total=1332 [2018-02-02 18:31:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-02-02 18:31:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-02-02 18:31:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-02-02 18:31:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-02-02 18:31:37,729 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 118 [2018-02-02 18:31:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:37,729 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-02-02 18:31:37,729 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-02-02 18:31:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-02-02 18:31:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-02-02 18:31:37,730 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:37,730 INFO L351 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:37,730 INFO L371 AbstractCegarLoop]: === Iteration 17 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1727297941, now seen corresponding path program 7 times [2018-02-02 18:31:37,731 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:37,731 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:37,731 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:37,731 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:37,731 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:37,742 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-02-02 18:31:37,848 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:37,848 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:37,853 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:37,880 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-02-02 18:31:38,016 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:38,016 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2018-02-02 18:31:38,016 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-02-02 18:31:38,016 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-02-02 18:31:38,017 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=631, Unknown=0, NotChecked=0, Total=992 [2018-02-02 18:31:38,017 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 32 states. [2018-02-02 18:31:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:38,226 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-02-02 18:31:38,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-02-02 18:31:38,226 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2018-02-02 18:31:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:38,227 INFO L225 Difference]: With dead ends: 139 [2018-02-02 18:31:38,227 INFO L226 Difference]: Without dead ends: 139 [2018-02-02 18:31:38,227 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=392, Invalid=664, Unknown=0, NotChecked=0, Total=1056 [2018-02-02 18:31:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-02-02 18:31:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-02-02 18:31:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-02-02 18:31:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-02-02 18:31:38,229 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 126 [2018-02-02 18:31:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:38,230 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-02-02 18:31:38,230 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-02-02 18:31:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-02-02 18:31:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-02-02 18:31:38,230 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:38,230 INFO L351 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:38,230 INFO L371 AbstractCegarLoop]: === Iteration 18 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash 293691787, now seen corresponding path program 8 times [2018-02-02 18:31:38,230 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:38,230 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:38,231 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:38,231 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:38,231 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:38,240 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-02-02 18:31:38,363 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:38,363 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:38,368 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:31:38,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:31:38,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:38,395 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-02-02 18:31:38,541 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:38,541 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2018-02-02 18:31:38,541 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-02-02 18:31:38,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-02-02 18:31:38,542 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=713, Unknown=0, NotChecked=0, Total=1122 [2018-02-02 18:31:38,542 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 34 states. [2018-02-02 18:31:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:38,660 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2018-02-02 18:31:38,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-02-02 18:31:38,661 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2018-02-02 18:31:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:38,661 INFO L225 Difference]: With dead ends: 147 [2018-02-02 18:31:38,661 INFO L226 Difference]: Without dead ends: 147 [2018-02-02 18:31:38,662 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=442, Invalid=748, Unknown=0, NotChecked=0, Total=1190 [2018-02-02 18:31:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-02-02 18:31:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-02-02 18:31:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-02-02 18:31:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-02-02 18:31:38,664 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 134 [2018-02-02 18:31:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:38,664 INFO L432 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-02-02 18:31:38,665 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-02-02 18:31:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-02-02 18:31:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-02-02 18:31:38,665 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:38,665 INFO L351 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:38,666 INFO L371 AbstractCegarLoop]: === Iteration 19 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:38,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1657017259, now seen corresponding path program 9 times [2018-02-02 18:31:38,666 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:38,666 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:38,666 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:38,667 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:38,667 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:38,683 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-02-02 18:31:38,863 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:38,864 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:38,868 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:31:39,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-02-02 18:31:39,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:39,805 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 58 proven. 450 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-02-02 18:31:40,075 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:40,075 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2018-02-02 18:31:40,076 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-02-02 18:31:40,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-02-02 18:31:40,076 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1112, Unknown=0, NotChecked=0, Total=1640 [2018-02-02 18:31:40,076 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 41 states. [2018-02-02 18:31:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:40,293 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-02-02 18:31:40,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-02-02 18:31:40,294 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 142 [2018-02-02 18:31:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:40,294 INFO L225 Difference]: With dead ends: 161 [2018-02-02 18:31:40,294 INFO L226 Difference]: Without dead ends: 161 [2018-02-02 18:31:40,295 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=572, Invalid=1234, Unknown=0, NotChecked=0, Total=1806 [2018-02-02 18:31:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-02-02 18:31:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2018-02-02 18:31:40,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-02-02 18:31:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-02-02 18:31:40,296 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 142 [2018-02-02 18:31:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:40,297 INFO L432 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-02-02 18:31:40,297 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-02-02 18:31:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-02-02 18:31:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-02-02 18:31:40,297 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:40,297 INFO L351 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:40,297 INFO L371 AbstractCegarLoop]: === Iteration 20 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:40,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1444851412, now seen corresponding path program 10 times [2018-02-02 18:31:40,297 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:40,297 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:40,298 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:40,298 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:40,298 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:40,308 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-02-02 18:31:40,499 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:40,499 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:40,504 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:31:41,807 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:31:41,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:41,812 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-02-02 18:31:41,971 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:41,971 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2018-02-02 18:31:41,971 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-02-02 18:31:41,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-02-02 18:31:41,972 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=989, Unknown=0, NotChecked=0, Total=1560 [2018-02-02 18:31:41,972 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states. [2018-02-02 18:31:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:42,077 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2018-02-02 18:31:42,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-02-02 18:31:42,078 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-02-02 18:31:42,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:42,078 INFO L225 Difference]: With dead ends: 171 [2018-02-02 18:31:42,078 INFO L226 Difference]: Without dead ends: 171 [2018-02-02 18:31:42,079 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=610, Invalid=1030, Unknown=0, NotChecked=0, Total=1640 [2018-02-02 18:31:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-02-02 18:31:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-02-02 18:31:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-02-02 18:31:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-02-02 18:31:42,081 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 154 [2018-02-02 18:31:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:42,081 INFO L432 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-02-02 18:31:42,081 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-02-02 18:31:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-02-02 18:31:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-02-02 18:31:42,081 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:42,081 INFO L351 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:42,081 INFO L371 AbstractCegarLoop]: === Iteration 21 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:31:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 43004939, now seen corresponding path program 11 times [2018-02-02 18:31:42,082 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:42,082 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:42,082 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:42,082 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:42,082 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:42,095 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-02-02 18:31:42,313 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:42,313 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:31:42,324 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:32:03,796 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-02-02 18:32:03,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:32:03,815 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:32:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-02-02 18:32:03,860 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:32:03,860 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2018-02-02 18:32:03,860 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-02-02 18:32:03,861 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-02-02 18:32:03,861 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-02-02 18:32:03,861 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 24 states. [2018-02-02 18:32:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:32:04,134 INFO L93 Difference]: Finished difference Result 179 states and 180 transitions. [2018-02-02 18:32:04,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-02-02 18:32:04,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 166 [2018-02-02 18:32:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:32:04,135 INFO L225 Difference]: With dead ends: 179 [2018-02-02 18:32:04,135 INFO L226 Difference]: Without dead ends: 179 [2018-02-02 18:32:04,135 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2018-02-02 18:32:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-02-02 18:32:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-02-02 18:32:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-02-02 18:32:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-02-02 18:32:04,138 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 166 [2018-02-02 18:32:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:32:04,138 INFO L432 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-02-02 18:32:04,138 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-02-02 18:32:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-02-02 18:32:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-02-02 18:32:04,139 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:32:04,139 INFO L351 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:32:04,139 INFO L371 AbstractCegarLoop]: === Iteration 22 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:32:04,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1199391275, now seen corresponding path program 12 times [2018-02-02 18:32:04,140 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:32:04,140 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:32:04,141 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:04,141 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:32:04,141 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:32:04,158 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:32:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-02-02 18:32:04,441 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:32:04,441 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:32:04,446 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:32:25,169 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-02-02 18:32:25,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:32:25,185 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:32:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-02-02 18:32:25,230 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:32:25,230 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 25 [2018-02-02 18:32:25,230 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-02-02 18:32:25,231 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-02-02 18:32:25,231 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-02-02 18:32:25,231 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 25 states. [2018-02-02 18:32:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:32:25,495 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-02-02 18:32:25,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-02-02 18:32:25,497 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2018-02-02 18:32:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:32:25,497 INFO L225 Difference]: With dead ends: 187 [2018-02-02 18:32:25,498 INFO L226 Difference]: Without dead ends: 187 [2018-02-02 18:32:25,498 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2018-02-02 18:32:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-02-02 18:32:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-02-02 18:32:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-02-02 18:32:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-02-02 18:32:25,500 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 174 [2018-02-02 18:32:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:32:25,500 INFO L432 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-02-02 18:32:25,500 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-02-02 18:32:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-02-02 18:32:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-02-02 18:32:25,501 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:32:25,501 INFO L351 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:32:25,501 INFO L371 AbstractCegarLoop]: === Iteration 23 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:32:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash 917677899, now seen corresponding path program 13 times [2018-02-02 18:32:25,501 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:32:25,501 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:32:25,502 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:25,502 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:32:25,502 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:32:25,513 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:32:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-02-02 18:32:25,760 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:32:25,760 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:32:25,765 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:32:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:32:25,818 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:32:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-02-02 18:32:26,153 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:32:26,153 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2018-02-02 18:32:26,153 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-02-02 18:32:26,153 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-02-02 18:32:26,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=1310, Unknown=0, NotChecked=0, Total=2070 [2018-02-02 18:32:26,154 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 46 states. [2018-02-02 18:32:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:32:26,316 INFO L93 Difference]: Finished difference Result 195 states and 196 transitions. [2018-02-02 18:32:26,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-02-02 18:32:26,316 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 182 [2018-02-02 18:32:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:32:26,317 INFO L225 Difference]: With dead ends: 195 [2018-02-02 18:32:26,317 INFO L226 Difference]: Without dead ends: 195 [2018-02-02 18:32:26,317 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=805, Invalid=1357, Unknown=0, NotChecked=0, Total=2162 [2018-02-02 18:32:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-02-02 18:32:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-02-02 18:32:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-02-02 18:32:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-02-02 18:32:26,319 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 182 [2018-02-02 18:32:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:32:26,319 INFO L432 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-02-02 18:32:26,319 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-02-02 18:32:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-02-02 18:32:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-02-02 18:32:26,320 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:32:26,320 INFO L351 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:32:26,320 INFO L371 AbstractCegarLoop]: === Iteration 24 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:32:26,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1121313643, now seen corresponding path program 14 times [2018-02-02 18:32:26,320 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:32:26,320 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:32:26,320 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:26,320 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:32:26,321 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:32:26,335 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:32:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-02-02 18:32:26,673 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:32:26,674 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:32:26,679 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:32:26,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:32:26,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:32:26,727 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:32:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-02-02 18:32:26,953 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:32:26,953 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2018-02-02 18:32:26,953 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-02-02 18:32:26,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-02-02 18:32:26,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1427, Unknown=0, NotChecked=0, Total=2256 [2018-02-02 18:32:26,954 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 48 states. [2018-02-02 18:32:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:32:27,110 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2018-02-02 18:32:27,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-02-02 18:32:27,111 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 190 [2018-02-02 18:32:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:32:27,111 INFO L225 Difference]: With dead ends: 203 [2018-02-02 18:32:27,111 INFO L226 Difference]: Without dead ends: 203 [2018-02-02 18:32:27,112 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=876, Invalid=1476, Unknown=0, NotChecked=0, Total=2352 [2018-02-02 18:32:27,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-02-02 18:32:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-02-02 18:32:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-02-02 18:32:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-02-02 18:32:27,115 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 190 [2018-02-02 18:32:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:32:27,115 INFO L432 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-02-02 18:32:27,115 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-02-02 18:32:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-02-02 18:32:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-02-02 18:32:27,115 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:32:27,115 INFO L351 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:32:27,115 INFO L371 AbstractCegarLoop]: === Iteration 25 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:32:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1456240267, now seen corresponding path program 15 times [2018-02-02 18:32:27,116 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:32:27,116 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:32:27,116 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:27,116 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:32:27,116 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:32:27,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:32:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-02-02 18:32:27,371 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:32:27,371 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:32:27,376 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:32:32,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-02-02 18:32:32,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:32:32,175 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:32:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-02-02 18:32:32,250 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:32:32,250 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 28 [2018-02-02 18:32:32,251 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-02-02 18:32:32,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-02-02 18:32:32,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-02-02 18:32:32,251 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 28 states. [2018-02-02 18:32:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:32:32,611 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-02-02 18:32:32,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-02-02 18:32:32,611 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 198 [2018-02-02 18:32:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:32:32,612 INFO L225 Difference]: With dead ends: 211 [2018-02-02 18:32:32,612 INFO L226 Difference]: Without dead ends: 211 [2018-02-02 18:32:32,612 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2018-02-02 18:32:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-02-02 18:32:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-02-02 18:32:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-02-02 18:32:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-02-02 18:32:32,614 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 198 [2018-02-02 18:32:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:32:32,614 INFO L432 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-02-02 18:32:32,614 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-02-02 18:32:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-02-02 18:32:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-02-02 18:32:32,615 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:32:32,615 INFO L351 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:32:32,615 INFO L371 AbstractCegarLoop]: === Iteration 26 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:32:32,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1245978453, now seen corresponding path program 16 times [2018-02-02 18:32:32,615 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:32:32,615 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:32:32,616 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:32,616 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:32:32,616 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:32:32,628 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:32:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2018-02-02 18:32:32,953 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:32:32,953 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:32:32,958 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:32:33,003 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:32:33,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:32:33,006 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:32:33,011 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-02-02 18:32:33,012 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:32:33,013 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:32:33,013 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:7 [2018-02-02 18:32:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1058 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:32:34,349 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:32:34,350 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 53] total 79 [2018-02-02 18:32:34,350 INFO L409 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-02-02 18:32:34,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-02-02 18:32:34,351 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1354, Invalid=4808, Unknown=0, NotChecked=0, Total=6162 [2018-02-02 18:32:34,351 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 79 states. [2018-02-02 18:32:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:32:34,983 INFO L93 Difference]: Finished difference Result 219 states and 220 transitions. [2018-02-02 18:32:34,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-02-02 18:32:34,983 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 206 [2018-02-02 18:32:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:32:34,984 INFO L225 Difference]: With dead ends: 219 [2018-02-02 18:32:34,984 INFO L226 Difference]: Without dead ends: 219 [2018-02-02 18:32:34,985 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2381, Invalid=9175, Unknown=0, NotChecked=0, Total=11556 [2018-02-02 18:32:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-02-02 18:32:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-02-02 18:32:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-02-02 18:32:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-02-02 18:32:34,988 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 206 [2018-02-02 18:32:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:32:34,988 INFO L432 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-02-02 18:32:34,988 INFO L433 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-02-02 18:32:34,988 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-02-02 18:32:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-02-02 18:32:34,989 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:32:34,989 INFO L351 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:32:34,989 INFO L371 AbstractCegarLoop]: === Iteration 27 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-02-02 18:32:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash -620125749, now seen corresponding path program 17 times [2018-02-02 18:32:34,989 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:32:34,989 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:32:34,990 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:34,990 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:32:34,990 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:32:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:32:35,011 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:32:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-02-02 18:32:35,394 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:32:35,394 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-02-02 18:32:35,401 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown