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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:08:22,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:08:22,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:08:22,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:08:22,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:08:22,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:08:22,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:08:22,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:08:22,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:08:22,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:08:22,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:08:22,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:08:22,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:08:22,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:08:22,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:08:22,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:08:22,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:08:22,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:08:22,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:08:22,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:08:22,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:08:22,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:08:22,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:08:22,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:08:22,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:08:22,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:08:22,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:08:22,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:08:22,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:08:22,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:08:22,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:08:22,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:08:22,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:08:22,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:08:22,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:08:22,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:08:22,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:08:22,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:08:22,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:08:22,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:08:22,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:08:22,378 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 [2019-10-13 20:08:22,391 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:08:22,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:08:22,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:08:22,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:08:22,393 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:08:22,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:08:22,393 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:08:22,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:08:22,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:08:22,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:08:22,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:08:22,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:08:22,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:08:22,395 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:08:22,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:08:22,395 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:08:22,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:08:22,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:08:22,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:08:22,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:08:22,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:08:22,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:08:22,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:08:22,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:08:22,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:08:22,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:08:22,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:08:22,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:08:22,398 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 [2019-10-13 20:08:22,684 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:08:22,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:08:22,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:08:22,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:08:22,705 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:08:22,706 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-10-13 20:08:22,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1de1589/b89b43cb0a96414fbfdf3d9c6b4f357d/FLAGa0302a92e [2019-10-13 20:08:23,461 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:08:23,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-10-13 20:08:23,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1de1589/b89b43cb0a96414fbfdf3d9c6b4f357d/FLAGa0302a92e [2019-10-13 20:08:23,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1de1589/b89b43cb0a96414fbfdf3d9c6b4f357d [2019-10-13 20:08:23,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:08:23,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:08:23,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:23,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:08:23,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:08:23,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:23" (1/1) ... [2019-10-13 20:08:23,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6cffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:23, skipping insertion in model container [2019-10-13 20:08:23,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:23" (1/1) ... [2019-10-13 20:08:23,654 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:08:23,741 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:08:24,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:24,702 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:08:25,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:25,097 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:08:25,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25 WrapperNode [2019-10-13 20:08:25,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:25,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:08:25,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:08:25,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:08:25,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:08:25,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:08:25,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:08:25,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:08:25,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (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 [2019-10-13 20:08:25,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:08:25,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:08:25,387 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:08:25,387 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:08:25,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:08:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:08:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:08:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:08:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:08:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:08:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:08:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:08:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:08:29,337 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:08:29,341 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:08:29,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:29 BoogieIcfgContainer [2019-10-13 20:08:29,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:08:29,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:08:29,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:08:29,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:08:29,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:23" (1/3) ... [2019-10-13 20:08:29,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eecf8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:29, skipping insertion in model container [2019-10-13 20:08:29,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (2/3) ... [2019-10-13 20:08:29,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eecf8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:29, skipping insertion in model container [2019-10-13 20:08:29,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:29" (3/3) ... [2019-10-13 20:08:29,364 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label28.c [2019-10-13 20:08:29,376 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:08:29,390 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:08:29,403 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:08:29,443 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:08:29,444 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:08:29,444 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:08:29,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:08:29,445 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:08:29,445 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:08:29,445 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:08:29,445 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:08:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 20:08:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 20:08:29,494 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:29,496 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] [2019-10-13 20:08:29,498 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:29,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1729511136, now seen corresponding path program 1 times [2019-10-13 20:08:29,518 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:29,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852006571] [2019-10-13 20:08:29,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:29,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:29,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:29,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852006571] [2019-10-13 20:08:29,853 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:29,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:08:29,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083124162] [2019-10-13 20:08:29,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:08:29,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:08:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:08:29,878 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-10-13 20:08:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:32,926 INFO L93 Difference]: Finished difference Result 1191 states and 2149 transitions. [2019-10-13 20:08:32,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:08:32,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-10-13 20:08:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:32,951 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 20:08:32,952 INFO L226 Difference]: Without dead ends: 692 [2019-10-13 20:08:32,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:08:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-10-13 20:08:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 690. [2019-10-13 20:08:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-13 20:08:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1154 transitions. [2019-10-13 20:08:33,056 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1154 transitions. Word has length 38 [2019-10-13 20:08:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:33,057 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1154 transitions. [2019-10-13 20:08:33,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:08:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1154 transitions. [2019-10-13 20:08:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 20:08:33,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:33,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:33,069 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1320950948, now seen corresponding path program 1 times [2019-10-13 20:08:33,069 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:33,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774996537] [2019-10-13 20:08:33,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:33,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:33,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:33,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774996537] [2019-10-13 20:08:33,309 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:33,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:08:33,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576451936] [2019-10-13 20:08:33,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:08:33,312 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:33,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:08:33,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:08:33,313 INFO L87 Difference]: Start difference. First operand 690 states and 1154 transitions. Second operand 6 states. [2019-10-13 20:08:38,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:38,112 INFO L93 Difference]: Finished difference Result 2057 states and 3487 transitions. [2019-10-13 20:08:38,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:38,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2019-10-13 20:08:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:38,134 INFO L225 Difference]: With dead ends: 2057 [2019-10-13 20:08:38,135 INFO L226 Difference]: Without dead ends: 1373 [2019-10-13 20:08:38,137 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 [2019-10-13 20:08:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2019-10-13 20:08:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1342. [2019-10-13 20:08:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2019-10-13 20:08:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2245 transitions. [2019-10-13 20:08:38,231 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2245 transitions. Word has length 111 [2019-10-13 20:08:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:38,233 INFO L462 AbstractCegarLoop]: Abstraction has 1342 states and 2245 transitions. [2019-10-13 20:08:38,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:08:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2245 transitions. [2019-10-13 20:08:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 20:08:38,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:38,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:38,243 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:38,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1532585933, now seen corresponding path program 1 times [2019-10-13 20:08:38,244 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:38,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611420506] [2019-10-13 20:08:38,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:38,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:38,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:38,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611420506] [2019-10-13 20:08:38,397 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:38,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:08:38,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673669796] [2019-10-13 20:08:38,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:38,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:38,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:08:38,399 INFO L87 Difference]: Start difference. First operand 1342 states and 2245 transitions. Second operand 5 states. [2019-10-13 20:08:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:42,654 INFO L93 Difference]: Finished difference Result 3990 states and 6801 transitions. [2019-10-13 20:08:42,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:42,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2019-10-13 20:08:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:42,680 INFO L225 Difference]: With dead ends: 3990 [2019-10-13 20:08:42,689 INFO L226 Difference]: Without dead ends: 2654 [2019-10-13 20:08:42,696 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 [2019-10-13 20:08:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2019-10-13 20:08:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2615. [2019-10-13 20:08:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2019-10-13 20:08:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3768 transitions. [2019-10-13 20:08:42,836 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3768 transitions. Word has length 114 [2019-10-13 20:08:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:42,838 INFO L462 AbstractCegarLoop]: Abstraction has 2615 states and 3768 transitions. [2019-10-13 20:08:42,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3768 transitions. [2019-10-13 20:08:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 20:08:42,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:42,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:42,843 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1482212639, now seen corresponding path program 1 times [2019-10-13 20:08:42,844 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:42,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220178846] [2019-10-13 20:08:42,844 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:42,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:42,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:43,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220178846] [2019-10-13 20:08:43,043 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:43,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:08:43,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836748119] [2019-10-13 20:08:43,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:08:43,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:43,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:08:43,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:08:43,045 INFO L87 Difference]: Start difference. First operand 2615 states and 3768 transitions. Second operand 6 states. [2019-10-13 20:08:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:48,581 INFO L93 Difference]: Finished difference Result 6572 states and 9809 transitions. [2019-10-13 20:08:48,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:08:48,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2019-10-13 20:08:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:48,607 INFO L225 Difference]: With dead ends: 6572 [2019-10-13 20:08:48,607 INFO L226 Difference]: Without dead ends: 3963 [2019-10-13 20:08:48,616 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 [2019-10-13 20:08:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2019-10-13 20:08:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3910. [2019-10-13 20:08:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3910 states. [2019-10-13 20:08:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 5486 transitions. [2019-10-13 20:08:48,736 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 5486 transitions. Word has length 124 [2019-10-13 20:08:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:48,736 INFO L462 AbstractCegarLoop]: Abstraction has 3910 states and 5486 transitions. [2019-10-13 20:08:48,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:08:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 5486 transitions. [2019-10-13 20:08:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:08:48,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:48,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:48,739 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash 934964196, now seen corresponding path program 1 times [2019-10-13 20:08:48,740 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:48,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556229165] [2019-10-13 20:08:48,740 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:48,740 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:48,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:48,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556229165] [2019-10-13 20:08:48,845 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:48,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:08:48,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938214702] [2019-10-13 20:08:48,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:48,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:48,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:08:48,847 INFO L87 Difference]: Start difference. First operand 3910 states and 5486 transitions. Second operand 5 states. [2019-10-13 20:08:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:55,682 INFO L93 Difference]: Finished difference Result 10080 states and 14344 transitions. [2019-10-13 20:08:55,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:55,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2019-10-13 20:08:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:55,711 INFO L225 Difference]: With dead ends: 10080 [2019-10-13 20:08:55,711 INFO L226 Difference]: Without dead ends: 6176 [2019-10-13 20:08:55,722 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 [2019-10-13 20:08:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2019-10-13 20:08:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 6153. [2019-10-13 20:08:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6153 states. [2019-10-13 20:08:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8483 transitions. [2019-10-13 20:08:55,869 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8483 transitions. Word has length 134 [2019-10-13 20:08:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:55,870 INFO L462 AbstractCegarLoop]: Abstraction has 6153 states and 8483 transitions. [2019-10-13 20:08:55,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8483 transitions. [2019-10-13 20:08:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 20:08:55,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:55,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:55,872 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1847889797, now seen corresponding path program 1 times [2019-10-13 20:08:55,873 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:55,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856284088] [2019-10-13 20:08:55,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:55,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:55,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:56,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856284088] [2019-10-13 20:08:56,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885740288] [2019-10-13 20:08:56,056 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 [2019-10-13 20:08:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:56,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:08:56,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:56,299 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:56,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:56,668 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:08:56,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 11 [2019-10-13 20:08:56,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934104456] [2019-10-13 20:08:56,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:08:56,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:08:56,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:56,675 INFO L87 Difference]: Start difference. First operand 6153 states and 8483 transitions. Second operand 7 states. [2019-10-13 20:09:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:03,092 INFO L93 Difference]: Finished difference Result 16121 states and 23080 transitions. [2019-10-13 20:09:03,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 20:09:03,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2019-10-13 20:09:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted.