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_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:13,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:13,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:13,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:13,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:13,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:13,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:13,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:13,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:13,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:13,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:13,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:13,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:14,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:14,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:14,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:14,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:14,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:14,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:14,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:14,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:14,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:14,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:14,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:14,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:14,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:14,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:14,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:14,036 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 00:07:14,050 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:14,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:14,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:14,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:14,052 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:14,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:14,053 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:14,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:14,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:14,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:14,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:14,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:14,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:14,054 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:14,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:14,055 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:14,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:14,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:14,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:14,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:14,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:14,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:14,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:14,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:14,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:14,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:14,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:14,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:14,057 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 00:07:14,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:14,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:14,347 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:14,349 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:14,349 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:14,350 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-10-15 00:07:14,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6b4d022/e2125fe3e86f4aa6814503b41f696dda/FLAG32f2406da [2019-10-15 00:07:15,083 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:15,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-10-15 00:07:15,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6b4d022/e2125fe3e86f4aa6814503b41f696dda/FLAG32f2406da [2019-10-15 00:07:15,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6b4d022/e2125fe3e86f4aa6814503b41f696dda [2019-10-15 00:07:15,257 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:15,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:15,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:15,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:15,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:15,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:15" (1/1) ... [2019-10-15 00:07:15,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d836b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:15, skipping insertion in model container [2019-10-15 00:07:15,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:15" (1/1) ... [2019-10-15 00:07:15,275 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:15,356 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:16,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:16,309 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:16,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:16,775 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:16,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16 WrapperNode [2019-10-15 00:07:16,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:16,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:16,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:16,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:16,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (1/1) ... [2019-10-15 00:07:16,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (1/1) ... [2019-10-15 00:07:16,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (1/1) ... [2019-10-15 00:07:16,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (1/1) ... [2019-10-15 00:07:16,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (1/1) ... [2019-10-15 00:07:16,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (1/1) ... [2019-10-15 00:07:16,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (1/1) ... [2019-10-15 00:07:16,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:16,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:16,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:16,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:16,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (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 00:07:17,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:17,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:20,427 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:20,427 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:20,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:20 BoogieIcfgContainer [2019-10-15 00:07:20,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:20,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:20,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:20,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:20,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:15" (1/3) ... [2019-10-15 00:07:20,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df0121d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:20, skipping insertion in model container [2019-10-15 00:07:20,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:16" (2/3) ... [2019-10-15 00:07:20,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df0121d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:20, skipping insertion in model container [2019-10-15 00:07:20,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:20" (3/3) ... [2019-10-15 00:07:20,442 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label23.c [2019-10-15 00:07:20,452 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:20,460 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:20,471 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:20,513 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:20,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:20,515 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:20,515 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:20,515 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:20,515 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:20,516 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:20,516 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 00:07:20,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:20,568 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] [2019-10-15 00:07:20,570 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1150521477, now seen corresponding path program 1 times [2019-10-15 00:07:20,587 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:20,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665297133] [2019-10-15 00:07:20,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:20,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:20,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:20,880 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 00:07:20,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665297133] [2019-10-15 00:07:20,882 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:20,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:20,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476259917] [2019-10-15 00:07:20,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:20,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:20,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:20,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:20,910 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:26,982 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-15 00:07:26,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:26,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-15 00:07:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:27,025 INFO L225 Difference]: With dead ends: 1554 [2019-10-15 00:07:27,026 INFO L226 Difference]: Without dead ends: 1036 [2019-10-15 00:07:27,041 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 00:07:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-15 00:07:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-10-15 00:07:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 00:07:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-10-15 00:07:27,199 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 23 [2019-10-15 00:07:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:27,201 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-10-15 00:07:27,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-10-15 00:07:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 00:07:27,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:27,210 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:07:27,211 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1552013474, now seen corresponding path program 1 times [2019-10-15 00:07:27,212 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:27,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102189540] [2019-10-15 00:07:27,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:27,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:27,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:27,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102189540] [2019-10-15 00:07:27,389 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:27,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:07:27,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412312188] [2019-10-15 00:07:27,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:07:27,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:27,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:07:27,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:07:27,393 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 3 states. [2019-10-15 00:07:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:30,867 INFO L93 Difference]: Finished difference Result 2009 states and 3472 transitions. [2019-10-15 00:07:30,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:07:30,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-10-15 00:07:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:30,880 INFO L225 Difference]: With dead ends: 2009 [2019-10-15 00:07:30,880 INFO L226 Difference]: Without dead ends: 1318 [2019-10-15 00:07:30,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:07:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2019-10-15 00:07:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1315. [2019-10-15 00:07:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2019-10-15 00:07:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1928 transitions. [2019-10-15 00:07:30,941 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1928 transitions. Word has length 92 [2019-10-15 00:07:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:30,942 INFO L462 AbstractCegarLoop]: Abstraction has 1315 states and 1928 transitions. [2019-10-15 00:07:30,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:07:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1928 transitions. [2019-10-15 00:07:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 00:07:30,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:30,953 INFO L380 BasicCegarLoop]: trace histogram [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 00:07:30,954 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:30,955 INFO L82 PathProgramCache]: Analyzing trace with hash 317241164, now seen corresponding path program 1 times [2019-10-15 00:07:30,956 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:30,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756071097] [2019-10-15 00:07:30,957 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:30,957 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:30,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:31,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756071097] [2019-10-15 00:07:31,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:31,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:31,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60846111] [2019-10-15 00:07:31,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:31,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:31,234 INFO L87 Difference]: Start difference. First operand 1315 states and 1928 transitions. Second operand 5 states. [2019-10-15 00:07:35,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:35,073 INFO L93 Difference]: Finished difference Result 3927 states and 5836 transitions. [2019-10-15 00:07:35,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:35,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-10-15 00:07:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:35,091 INFO L225 Difference]: With dead ends: 3927 [2019-10-15 00:07:35,100 INFO L226 Difference]: Without dead ends: 2618 [2019-10-15 00:07:35,105 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:07:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2019-10-15 00:07:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2584. [2019-10-15 00:07:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2584 states. [2019-10-15 00:07:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 3371 transitions. [2019-10-15 00:07:35,206 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 3371 transitions. Word has length 109 [2019-10-15 00:07:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:35,206 INFO L462 AbstractCegarLoop]: Abstraction has 2584 states and 3371 transitions. [2019-10-15 00:07:35,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 3371 transitions. [2019-10-15 00:07:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-10-15 00:07:35,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:35,218 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:07:35,219 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:35,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:35,219 INFO L82 PathProgramCache]: Analyzing trace with hash 993341937, now seen corresponding path program 1 times [2019-10-15 00:07:35,220 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:35,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349663049] [2019-10-15 00:07:35,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:35,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:35,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:07:35,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349663049] [2019-10-15 00:07:35,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859986744] [2019-10-15 00:07:35,737 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 00:07:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:35,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 00:07:35,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:07:36,126 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:07:36,662 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:36,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-10-15 00:07:36,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535366532] [2019-10-15 00:07:36,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:36,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:07:36,664 INFO L87 Difference]: Start difference. First operand 2584 states and 3371 transitions. Second operand 4 states. [2019-10-15 00:07:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:42,524 INFO L93 Difference]: Finished difference Result 7366 states and 9760 transitions. [2019-10-15 00:07:42,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:42,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 297 [2019-10-15 00:07:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:42,553 INFO L225 Difference]: With dead ends: 7366 [2019-10-15 00:07:42,553 INFO L226 Difference]: Without dead ends: 4788 [2019-10-15 00:07:42,560 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:07:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2019-10-15 00:07:42,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 4165. [2019-10-15 00:07:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4165 states. [2019-10-15 00:07:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 5432 transitions. [2019-10-15 00:07:42,690 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 5432 transitions. Word has length 297 [2019-10-15 00:07:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:42,692 INFO L462 AbstractCegarLoop]: Abstraction has 4165 states and 5432 transitions. [2019-10-15 00:07:42,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 5432 transitions. [2019-10-15 00:07:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-10-15 00:07:42,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:42,700 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:07:42,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:42,913 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:42,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2040498893, now seen corresponding path program 1 times [2019-10-15 00:07:42,914 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:42,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117227862] [2019-10-15 00:07:42,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:43,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117227862] [2019-10-15 00:07:43,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221303875] [2019-10-15 00:07:43,364 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 00:07:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:43,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 00:07:43,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 00:07:43,717 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 00:07:43,833 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:07:43,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-15 00:07:43,834 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463828643] [2019-10-15 00:07:43,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:43,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:43,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:07:43,838 INFO L87 Difference]: Start difference. First operand 4165 states and 5432 transitions. Second operand 4 states. [2019-10-15 00:07:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:47,617 INFO L93 Difference]: Finished difference Result 10815 states and 14653 transitions. [2019-10-15 00:07:47,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:47,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2019-10-15 00:07:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:47,652 INFO L225 Difference]: With dead ends: 10815 [2019-10-15 00:07:47,652 INFO L226 Difference]: Without dead ends: 6656 [2019-10-15 00:07:47,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:07:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2019-10-15 00:07:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 6343. [2019-10-15 00:07:47,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6343 states. [2019-10-15 00:07:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 8261 transitions. [2019-10-15 00:07:47,820 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 8261 transitions. Word has length 349 [2019-10-15 00:07:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:47,821 INFO L462 AbstractCegarLoop]: Abstraction has 6343 states and 8261 transitions. [2019-10-15 00:07:47,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:47,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 8261 transitions. [2019-10-15 00:07:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-10-15 00:07:47,831 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:47,832 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:07:48,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:48,036 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:48,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1962388647, now seen corresponding path program 1 times [2019-10-15 00:07:48,037 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:48,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989410868] [2019-10-15 00:07:48,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:48,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:48,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:48,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989410868] [2019-10-15 00:07:48,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748533859] [2019-10-15 00:07:48,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:48,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:07:48,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:48,732 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:48,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1537977432] [2019-10-15 00:07:48,924 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 397 [2019-10-15 00:07:48,982 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:07:48,982 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)