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/Problem01_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:54:44,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:54:44,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:54:44,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:54:44,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:54:44,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:54:44,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:54:44,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:54:44,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:54:44,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:54:44,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:54:44,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:54:44,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:54:44,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:54:44,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:54:44,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:54:44,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:54:44,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:54:44,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:54:44,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:54:44,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:54:44,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:54:44,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:54:44,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:54:44,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:54:44,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:54:44,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:54:44,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:54:44,963 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 [2019-10-14 23:54:44,977 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:54:44,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:54:44,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:54:44,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:54:44,979 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:54:44,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:54:44,979 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:54:44,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:54:44,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:54:44,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:54:44,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:54:44,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:54:44,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:54:44,981 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:54:44,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:54:44,981 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:54:44,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:54:44,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:54:44,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:54:44,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:54:44,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:54:44,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:54:44,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:54:44,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:54:44,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:54:44,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:54:44,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:54:44,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:54:44,984 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 [2019-10-14 23:54:45,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:54:45,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:54:45,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:54:45,300 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:54:45,300 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:54:45,300 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label47.c [2019-10-14 23:54:45,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13147a878/5c9601313be74004a5f6634db20f93dc/FLAGf849677f5 [2019-10-14 23:54:45,933 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:54:45,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label47.c [2019-10-14 23:54:45,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13147a878/5c9601313be74004a5f6634db20f93dc/FLAGf849677f5 [2019-10-14 23:54:46,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13147a878/5c9601313be74004a5f6634db20f93dc [2019-10-14 23:54:46,264 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:54:46,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:54:46,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:46,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:54:46,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:54:46,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:46" (1/1) ... [2019-10-14 23:54:46,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa87bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:46, skipping insertion in model container [2019-10-14 23:54:46,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:46" (1/1) ... [2019-10-14 23:54:46,281 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:54:46,341 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:54:47,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:47,011 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:54:47,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:47,146 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:54:47,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47 WrapperNode [2019-10-14 23:54:47,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:47,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:54:47,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:54:47,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:54:47,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (1/1) ... [2019-10-14 23:54:47,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (1/1) ... [2019-10-14 23:54:47,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (1/1) ... [2019-10-14 23:54:47,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (1/1) ... [2019-10-14 23:54:47,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (1/1) ... [2019-10-14 23:54:47,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (1/1) ... [2019-10-14 23:54:47,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (1/1) ... [2019-10-14 23:54:47,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:54:47,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:54:47,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:54:47,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:54:47,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (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 [2019-10-14 23:54:47,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:54:47,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:54:47,355 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:54:47,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:54:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:54:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:54:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:54:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:54:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:54:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:54:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:54:48,550 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:54:48,551 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:54:48,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:48 BoogieIcfgContainer [2019-10-14 23:54:48,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:54:48,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:54:48,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:54:48,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:54:48,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:54:46" (1/3) ... [2019-10-14 23:54:48,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7528f63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:48, skipping insertion in model container [2019-10-14 23:54:48,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:47" (2/3) ... [2019-10-14 23:54:48,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7528f63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:48, skipping insertion in model container [2019-10-14 23:54:48,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:48" (3/3) ... [2019-10-14 23:54:48,570 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label47.c [2019-10-14 23:54:48,583 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:54:48,592 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:54:48,603 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:54:48,639 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:54:48,639 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:54:48,641 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:54:48,641 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:54:48,641 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:54:48,641 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:54:48,642 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:54:48,642 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:54:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:54:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 23:54:48,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:48,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:48,694 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash -544114481, now seen corresponding path program 1 times [2019-10-14 23:54:48,708 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:48,709 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704493994] [2019-10-14 23:54:48,709 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:48,709 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:48,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:49,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704493994] [2019-10-14 23:54:49,107 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:49,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:49,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713467823] [2019-10-14 23:54:49,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:49,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:49,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:49,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:49,131 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:54:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:49,956 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:54:49,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:49,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2019-10-14 23:54:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:49,973 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:54:49,974 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:54:49,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:54:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:54:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:54:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-14 23:54:50,067 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 79 [2019-10-14 23:54:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:50,069 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-14 23:54:50,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-14 23:54:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 23:54:50,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:50,085 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:50,085 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash -488298920, now seen corresponding path program 1 times [2019-10-14 23:54:50,087 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:50,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369900767] [2019-10-14 23:54:50,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:50,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:50,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:50,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369900767] [2019-10-14 23:54:50,251 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:50,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:50,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621917067] [2019-10-14 23:54:50,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:50,254 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:50,255 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-14 23:54:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:51,038 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-10-14 23:54:51,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:51,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-10-14 23:54:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:51,046 INFO L225 Difference]: With dead ends: 703 [2019-10-14 23:54:51,046 INFO L226 Difference]: Without dead ends: 431 [2019-10-14 23:54:51,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-14 23:54:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-14 23:54:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-14 23:54:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-14 23:54:51,098 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 89 [2019-10-14 23:54:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:51,099 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-14 23:54:51,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-14 23:54:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:54:51,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:51,104 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:51,105 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash -905085738, now seen corresponding path program 1 times [2019-10-14 23:54:51,105 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:51,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518035695] [2019-10-14 23:54:51,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:51,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:51,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:51,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518035695] [2019-10-14 23:54:51,241 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:51,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:51,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698640475] [2019-10-14 23:54:51,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:51,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:51,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:51,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:51,244 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-10-14 23:54:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:51,783 INFO L93 Difference]: Finished difference Result 1241 states and 1783 transitions. [2019-10-14 23:54:51,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:51,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-10-14 23:54:51,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:51,791 INFO L225 Difference]: With dead ends: 1241 [2019-10-14 23:54:51,791 INFO L226 Difference]: Without dead ends: 828 [2019-10-14 23:54:51,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-14 23:54:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-14 23:54:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-14 23:54:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1098 transitions. [2019-10-14 23:54:51,836 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1098 transitions. Word has length 90 [2019-10-14 23:54:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:51,837 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1098 transitions. [2019-10-14 23:54:51,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1098 transitions. [2019-10-14 23:54:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 23:54:51,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:51,840 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:51,840 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -886444004, now seen corresponding path program 1 times [2019-10-14 23:54:51,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:51,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604199731] [2019-10-14 23:54:51,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:51,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:51,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:51,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604199731] [2019-10-14 23:54:51,976 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:51,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:54:51,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016685701] [2019-10-14 23:54:51,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:54:51,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:51,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:54:51,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:54:51,978 INFO L87 Difference]: Start difference. First operand 828 states and 1098 transitions. Second operand 4 states. [2019-10-14 23:54:52,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:52,982 INFO L93 Difference]: Finished difference Result 2740 states and 3761 transitions. [2019-10-14 23:54:52,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:54:52,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-10-14 23:54:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:52,996 INFO L225 Difference]: With dead ends: 2740 [2019-10-14 23:54:52,996 INFO L226 Difference]: Without dead ends: 1918 [2019-10-14 23:54:52,999 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 [2019-10-14 23:54:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2019-10-14 23:54:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1241. [2019-10-14 23:54:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2019-10-14 23:54:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1689 transitions. [2019-10-14 23:54:53,065 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1689 transitions. Word has length 91 [2019-10-14 23:54:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:53,066 INFO L462 AbstractCegarLoop]: Abstraction has 1241 states and 1689 transitions. [2019-10-14 23:54:53,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:54:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1689 transitions. [2019-10-14 23:54:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:54:53,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:53,069 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:53,070 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:53,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1065436450, now seen corresponding path program 1 times [2019-10-14 23:54:53,070 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:53,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675202080] [2019-10-14 23:54:53,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:53,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:53,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:53,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675202080] [2019-10-14 23:54:53,187 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:53,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:53,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378942930] [2019-10-14 23:54:53,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:53,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:53,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:53,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:53,189 INFO L87 Difference]: Start difference. First operand 1241 states and 1689 transitions. Second operand 3 states. [2019-10-14 23:54:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:53,809 INFO L93 Difference]: Finished difference Result 3433 states and 4830 transitions. [2019-10-14 23:54:53,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:53,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-14 23:54:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:53,828 INFO L225 Difference]: With dead ends: 3433 [2019-10-14 23:54:53,829 INFO L226 Difference]: Without dead ends: 2198 [2019-10-14 23:54:53,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2019-10-14 23:54:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 2198. [2019-10-14 23:54:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2198 states. [2019-10-14 23:54:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 2964 transitions. [2019-10-14 23:54:53,932 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 2964 transitions. Word has length 96 [2019-10-14 23:54:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:53,932 INFO L462 AbstractCegarLoop]: Abstraction has 2198 states and 2964 transitions. [2019-10-14 23:54:53,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 2964 transitions. [2019-10-14 23:54:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 23:54:53,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:53,939 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, 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] [2019-10-14 23:54:53,940 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1520464804, now seen corresponding path program 1 times [2019-10-14 23:54:53,940 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:53,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513668332] [2019-10-14 23:54:53,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:53,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:53,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:54,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513668332] [2019-10-14 23:54:54,078 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:54,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:54,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461122357] [2019-10-14 23:54:54,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:54,080 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:54,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:54,082 INFO L87 Difference]: Start difference. First operand 2198 states and 2964 transitions. Second operand 6 states. [2019-10-14 23:54:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:54,863 INFO L93 Difference]: Finished difference Result 4718 states and 6523 transitions. [2019-10-14 23:54:54,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:54,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-14 23:54:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:54,881 INFO L225 Difference]: With dead ends: 4718 [2019-10-14 23:54:54,882 INFO L226 Difference]: Without dead ends: 2526 [2019-10-14 23:54:54,889 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 [2019-10-14 23:54:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2019-10-14 23:54:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 1817. [2019-10-14 23:54:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2019-10-14 23:54:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2236 transitions. [2019-10-14 23:54:54,960 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2236 transitions. Word has length 123 [2019-10-14 23:54:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:54,960 INFO L462 AbstractCegarLoop]: Abstraction has 1817 states and 2236 transitions. [2019-10-14 23:54:54,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2236 transitions. [2019-10-14 23:54:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:54:54,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:54,966 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:54,966 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2092244509, now seen corresponding path program 1 times [2019-10-14 23:54:54,967 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:54,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226646450] [2019-10-14 23:54:54,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:54,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:54,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:55,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226646450] [2019-10-14 23:54:55,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111077596] [2019-10-14 23:54:55,121 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 [2019-10-14 23:54:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:55,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:54:55,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:55,329 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:55,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [823799083] [2019-10-14 23:54:55,479 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 135 [2019-10-14 23:54:55,562 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:55,562 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)