java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:29,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:29,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:29,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:29,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:29,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:29,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:29,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:29,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:29,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:29,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:29,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:29,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:29,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:29,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:29,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:29,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:29,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:29,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:29,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:29,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:29,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:29,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:29,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:29,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:29,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:29,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:29,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:29,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:07:29,596 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:29,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:29,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:29,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:29,598 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:29,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:29,599 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:29,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:29,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:29,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:29,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:29,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:29,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:29,600 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:29,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:29,600 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:29,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:29,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:29,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:29,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:29,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:29,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:29,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:29,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:29,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:29,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:29,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:29,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:29,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:07:29,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:29,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:29,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:29,964 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:29,965 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:29,965 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-10-15 00:07:30,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ed44125/3127be5891944b29916af836b54d8020/FLAG016ac1d36 [2019-10-15 00:07:30,686 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:30,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-10-15 00:07:30,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ed44125/3127be5891944b29916af836b54d8020/FLAG016ac1d36 [2019-10-15 00:07:31,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ed44125/3127be5891944b29916af836b54d8020 [2019-10-15 00:07:31,017 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:31,018 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:31,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:31,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:31,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:31,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:31" (1/1) ... [2019-10-15 00:07:31,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3d015c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:31, skipping insertion in model container [2019-10-15 00:07:31,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:31" (1/1) ... [2019-10-15 00:07:31,035 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:31,135 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:32,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:32,064 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:32,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:32,377 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:32,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32 WrapperNode [2019-10-15 00:07:32,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:32,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:32,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:32,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:32,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (1/1) ... [2019-10-15 00:07:32,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (1/1) ... [2019-10-15 00:07:32,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (1/1) ... [2019-10-15 00:07:32,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (1/1) ... [2019-10-15 00:07:32,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (1/1) ... [2019-10-15 00:07:32,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (1/1) ... [2019-10-15 00:07:32,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (1/1) ... [2019-10-15 00:07:32,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:32,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:32,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:32,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:32,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (1/1) ... No working directory specified, using /storage/repos/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 [2019-10-15 00:07:32,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:32,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:32,668 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:32,669 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:32,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:36,205 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:36,205 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:36,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:36 BoogieIcfgContainer [2019-10-15 00:07:36,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:36,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:36,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:36,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:36,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:31" (1/3) ... [2019-10-15 00:07:36,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75236027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:36, skipping insertion in model container [2019-10-15 00:07:36,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:32" (2/3) ... [2019-10-15 00:07:36,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75236027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:36, skipping insertion in model container [2019-10-15 00:07:36,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:36" (3/3) ... [2019-10-15 00:07:36,216 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label40.c [2019-10-15 00:07:36,226 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:36,234 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:36,246 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:36,277 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:36,278 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:36,278 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:36,278 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:36,278 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:36,278 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:36,278 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:36,278 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 00:07:36,316 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:36,317 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:36,319 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1190948056, now seen corresponding path program 1 times [2019-10-15 00:07:36,332 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:36,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939690788] [2019-10-15 00:07:36,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:36,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:36,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:36,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939690788] [2019-10-15 00:07:36,589 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:36,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:36,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136967899] [2019-10-15 00:07:36,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:36,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:36,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:36,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:36,613 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:41,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:41,981 INFO L93 Difference]: Finished difference Result 1497 states and 2757 transitions. [2019-10-15 00:07:41,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:41,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 00:07:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:42,009 INFO L225 Difference]: With dead ends: 1497 [2019-10-15 00:07:42,009 INFO L226 Difference]: Without dead ends: 993 [2019-10-15 00:07:42,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-10-15 00:07:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-10-15 00:07:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:07:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-10-15 00:07:42,197 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 32 [2019-10-15 00:07:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:42,198 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-10-15 00:07:42,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-10-15 00:07:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 00:07:42,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:42,210 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:42,210 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 679417420, now seen corresponding path program 1 times [2019-10-15 00:07:42,212 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:42,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483708496] [2019-10-15 00:07:42,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:42,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483708496] [2019-10-15 00:07:42,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990256872] [2019-10-15 00:07:42,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:42,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:07:42,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:42,798 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:42,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:43,056 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:07:43,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 12 [2019-10-15 00:07:43,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909234440] [2019-10-15 00:07:43,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:07:43,059 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:43,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:07:43,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:07:43,060 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 7 states. [2019-10-15 00:07:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:49,794 INFO L93 Difference]: Finished difference Result 2345 states and 3373 transitions. [2019-10-15 00:07:49,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 00:07:49,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2019-10-15 00:07:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:49,807 INFO L225 Difference]: With dead ends: 2345 [2019-10-15 00:07:49,808 INFO L226 Difference]: Without dead ends: 1669 [2019-10-15 00:07:49,811 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-10-15 00:07:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2019-10-15 00:07:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1345. [2019-10-15 00:07:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-10-15 00:07:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1830 transitions. [2019-10-15 00:07:49,860 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1830 transitions. Word has length 101 [2019-10-15 00:07:49,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:49,861 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1830 transitions. [2019-10-15 00:07:49,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:07:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1830 transitions. [2019-10-15 00:07:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-15 00:07:49,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:49,864 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:50,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:50,074 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:50,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash -603532513, now seen corresponding path program 1 times [2019-10-15 00:07:50,075 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:50,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483171220] [2019-10-15 00:07:50,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,078 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:50,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483171220] [2019-10-15 00:07:50,311 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:50,311 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:07:50,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906230247] [2019-10-15 00:07:50,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:07:50,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:07:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:07:50,323 INFO L87 Difference]: Start difference. First operand 1345 states and 1830 transitions. Second operand 6 states. [2019-10-15 00:07:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:53,731 INFO L93 Difference]: Finished difference Result 3686 states and 5245 transitions. [2019-10-15 00:07:53,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:07:53,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2019-10-15 00:07:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:53,752 INFO L225 Difference]: With dead ends: 3686 [2019-10-15 00:07:53,753 INFO L226 Difference]: Without dead ends: 2347 [2019-10-15 00:07:53,757 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:07:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2019-10-15 00:07:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2308. [2019-10-15 00:07:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2308 states. [2019-10-15 00:07:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 3185 transitions. [2019-10-15 00:07:53,851 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 3185 transitions. Word has length 106 [2019-10-15 00:07:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:53,852 INFO L462 AbstractCegarLoop]: Abstraction has 2308 states and 3185 transitions. [2019-10-15 00:07:53,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:07:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 3185 transitions. [2019-10-15 00:07:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 00:07:53,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:53,862 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:53,863 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:53,863 INFO L82 PathProgramCache]: Analyzing trace with hash -986664877, now seen corresponding path program 1 times [2019-10-15 00:07:53,863 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:53,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512576337] [2019-10-15 00:07:53,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:53,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:53,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:54,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512576337] [2019-10-15 00:07:54,034 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:54,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:54,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758393645] [2019-10-15 00:07:54,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:54,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:54,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:54,037 INFO L87 Difference]: Start difference. First operand 2308 states and 3185 transitions. Second operand 4 states. [2019-10-15 00:07:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:57,457 INFO L93 Difference]: Finished difference Result 6800 states and 9448 transitions. [2019-10-15 00:07:57,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:57,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-10-15 00:07:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:57,485 INFO L225 Difference]: With dead ends: 6800 [2019-10-15 00:07:57,485 INFO L226 Difference]: Without dead ends: 4498 [2019-10-15 00:07:57,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2019-10-15 00:07:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4493. [2019-10-15 00:07:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4493 states. [2019-10-15 00:07:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 5779 transitions. [2019-10-15 00:07:57,610 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 5779 transitions. Word has length 112 [2019-10-15 00:07:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:57,612 INFO L462 AbstractCegarLoop]: Abstraction has 4493 states and 5779 transitions. [2019-10-15 00:07:57,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 5779 transitions. [2019-10-15 00:07:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 00:07:57,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:57,616 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:57,616 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:57,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1976934134, now seen corresponding path program 1 times [2019-10-15 00:07:57,618 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:57,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317590723] [2019-10-15 00:07:57,618 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:57,618 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:57,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:57,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317590723] [2019-10-15 00:07:57,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867652599] [2019-10-15 00:07:57,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:57,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 00:07:57,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:57,977 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:58,125 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:58,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2019-10-15 00:07:58,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008773369] [2019-10-15 00:07:58,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:07:58,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:58,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:07:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-10-15 00:07:58,128 INFO L87 Difference]: Start difference. First operand 4493 states and 5779 transitions. Second operand 6 states. [2019-10-15 00:08:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:03,687 INFO L93 Difference]: Finished difference Result 12799 states and 17374 transitions. [2019-10-15 00:08:03,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:08:03,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-10-15 00:08:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:03,727 INFO L225 Difference]: With dead ends: 12799 [2019-10-15 00:08:03,727 INFO L226 Difference]: Without dead ends: 8312 [2019-10-15 00:08:03,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-10-15 00:08:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8312 states. [2019-10-15 00:08:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8312 to 8292. [2019-10-15 00:08:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8292 states. [2019-10-15 00:08:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8292 states to 8292 states and 11145 transitions. [2019-10-15 00:08:03,965 INFO L78 Accepts]: Start accepts. Automaton has 8292 states and 11145 transitions. Word has length 127 [2019-10-15 00:08:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:03,966 INFO L462 AbstractCegarLoop]: Abstraction has 8292 states and 11145 transitions. [2019-10-15 00:08:03,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8292 states and 11145 transitions. [2019-10-15 00:08:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-15 00:08:03,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:03,974 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:04,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:04,178 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash 316777602, now seen corresponding path program 1 times [2019-10-15 00:08:04,179 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:04,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482406262] [2019-10-15 00:08:04,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:04,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:04,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 00:08:04,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482406262] [2019-10-15 00:08:04,402 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:04,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:04,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423973344] [2019-10-15 00:08:04,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:04,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:04,408 INFO L87 Difference]: Start difference. First operand 8292 states and 11145 transitions. Second operand 4 states. [2019-10-15 00:08:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:08,455 INFO L93 Difference]: Finished difference Result 20952 states and 29682 transitions. [2019-10-15 00:08:08,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:08,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 190 [2019-10-15 00:08:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:08,527 INFO L225 Difference]: With dead ends: 20952 [2019-10-15 00:08:08,527 INFO L226 Difference]: Without dead ends: 12666 [2019-10-15 00:08:08,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:08,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2019-10-15 00:08:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 11726. [2019-10-15 00:08:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11726 states. [2019-10-15 00:08:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11726 states to 11726 states and 16677 transitions. [2019-10-15 00:08:08,883 INFO L78 Accepts]: Start accepts. Automaton has 11726 states and 16677 transitions. Word has length 190 [2019-10-15 00:08:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:08,884 INFO L462 AbstractCegarLoop]: Abstraction has 11726 states and 16677 transitions. [2019-10-15 00:08:08,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 11726 states and 16677 transitions. [2019-10-15 00:08:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-15 00:08:08,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:08,894 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:08,894 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2024125728, now seen corresponding path program 1 times [2019-10-15 00:08:08,895 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:08,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581310758] [2019-10-15 00:08:08,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:08,896 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:08,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat