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/Problem11_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:06,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:06,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:06,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:06,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:06,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:06,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:06,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:06,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:06,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:06,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:06,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:06,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:06,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:06,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:06,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:06,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:06,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:06,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:06,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:06,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:06,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:06,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:06,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:06,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:05:06,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:05:06,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:05:06,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:05:06,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:05:06,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:05:06,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:06,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:06,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:06,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:06,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:06,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:06,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:06,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:06,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:06,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:06,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:06,117 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 20:05:06,151 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:06,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:06,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:06,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:06,156 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:06,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:06,156 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:06,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:06,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:06,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:06,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:06,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:06,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:06,158 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:06,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:06,158 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:06,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:06,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:06,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:06,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:06,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:06,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:06,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:06,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:06,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:06,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:06,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:06,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:06,161 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 20:05:06,440 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:06,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:06,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:06,465 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:06,465 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:06,466 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2019-10-13 20:05:06,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e203b2f0c/41d99b6539cc4dae9e2d84fb527644f1/FLAG5586d6467 [2019-10-13 20:05:07,216 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:07,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2019-10-13 20:05:07,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e203b2f0c/41d99b6539cc4dae9e2d84fb527644f1/FLAG5586d6467 [2019-10-13 20:05:07,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e203b2f0c/41d99b6539cc4dae9e2d84fb527644f1 [2019-10-13 20:05:07,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:07,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:07,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:07,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:07,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:07,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:07" (1/1) ... [2019-10-13 20:05:07,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ac78c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:07, skipping insertion in model container [2019-10-13 20:05:07,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:07" (1/1) ... [2019-10-13 20:05:07,441 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:07,513 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:08,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:08,132 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:08,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:08,370 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:08,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08 WrapperNode [2019-10-13 20:05:08,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:08,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:08,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:08,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:08,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:08,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:08,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:08,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:08,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (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 20:05:08,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:08,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:08,629 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:08,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:08,629 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:08,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:08,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:10,433 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:10,434 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:10,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:10 BoogieIcfgContainer [2019-10-13 20:05:10,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:10,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:10,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:10,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:10,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:07" (1/3) ... [2019-10-13 20:05:10,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566a78f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:10, skipping insertion in model container [2019-10-13 20:05:10,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (2/3) ... [2019-10-13 20:05:10,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566a78f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:10, skipping insertion in model container [2019-10-13 20:05:10,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:10" (3/3) ... [2019-10-13 20:05:10,447 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label50.c [2019-10-13 20:05:10,458 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:10,490 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:10,502 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:10,545 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:10,546 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:10,546 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:10,546 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:10,546 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:10,546 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:10,546 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:10,547 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:05:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 20:05:10,592 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:10,592 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] [2019-10-13 20:05:10,594 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash -172206893, now seen corresponding path program 1 times [2019-10-13 20:05:10,605 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:10,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977612533] [2019-10-13 20:05:10,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:10,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:10,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:10,934 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 20:05:10,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977612533] [2019-10-13 20:05:10,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:10,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:10,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450464955] [2019-10-13 20:05:10,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:10,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:10,961 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:05:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:13,321 INFO L93 Difference]: Finished difference Result 997 states and 1776 transitions. [2019-10-13 20:05:13,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:13,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-10-13 20:05:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:13,345 INFO L225 Difference]: With dead ends: 997 [2019-10-13 20:05:13,345 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 20:05:13,358 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 20:05:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2019-10-13 20:05:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 20:05:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 896 transitions. [2019-10-13 20:05:13,452 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 896 transitions. Word has length 42 [2019-10-13 20:05:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:13,452 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 896 transitions. [2019-10-13 20:05:13,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 896 transitions. [2019-10-13 20:05:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 20:05:13,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:13,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:13,459 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash -258983758, now seen corresponding path program 1 times [2019-10-13 20:05:13,460 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:13,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533214022] [2019-10-13 20:05:13,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:13,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:13,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:13,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533214022] [2019-10-13 20:05:13,709 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:13,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:13,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965907185] [2019-10-13 20:05:13,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:13,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:13,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:13,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:13,716 INFO L87 Difference]: Start difference. First operand 620 states and 896 transitions. Second operand 6 states. [2019-10-13 20:05:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:15,326 INFO L93 Difference]: Finished difference Result 1833 states and 2715 transitions. [2019-10-13 20:05:15,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:15,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-10-13 20:05:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:15,338 INFO L225 Difference]: With dead ends: 1833 [2019-10-13 20:05:15,338 INFO L226 Difference]: Without dead ends: 1219 [2019-10-13 20:05:15,341 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 [2019-10-13 20:05:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2019-10-13 20:05:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1200. [2019-10-13 20:05:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-10-13 20:05:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1735 transitions. [2019-10-13 20:05:15,402 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1735 transitions. Word has length 114 [2019-10-13 20:05:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:15,403 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 1735 transitions. [2019-10-13 20:05:15,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1735 transitions. [2019-10-13 20:05:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 20:05:15,408 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:15,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:15,409 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash -590798395, now seen corresponding path program 1 times [2019-10-13 20:05:15,410 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:15,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024857734] [2019-10-13 20:05:15,410 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:15,410 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:15,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:15,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024857734] [2019-10-13 20:05:15,630 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:15,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:15,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599958138] [2019-10-13 20:05:15,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:15,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:15,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:15,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:15,633 INFO L87 Difference]: Start difference. First operand 1200 states and 1735 transitions. Second operand 4 states. [2019-10-13 20:05:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:17,564 INFO L93 Difference]: Finished difference Result 3552 states and 5208 transitions. [2019-10-13 20:05:17,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:17,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-10-13 20:05:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:17,578 INFO L225 Difference]: With dead ends: 3552 [2019-10-13 20:05:17,579 INFO L226 Difference]: Without dead ends: 2358 [2019-10-13 20:05:17,582 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 [2019-10-13 20:05:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2019-10-13 20:05:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2153. [2019-10-13 20:05:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2019-10-13 20:05:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3070 transitions. [2019-10-13 20:05:17,655 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3070 transitions. Word has length 115 [2019-10-13 20:05:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:17,656 INFO L462 AbstractCegarLoop]: Abstraction has 2153 states and 3070 transitions. [2019-10-13 20:05:17,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3070 transitions. [2019-10-13 20:05:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 20:05:17,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:17,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:17,662 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash 865187038, now seen corresponding path program 1 times [2019-10-13 20:05:17,663 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:17,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374695422] [2019-10-13 20:05:17,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:17,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:17,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:17,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374695422] [2019-10-13 20:05:17,911 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:17,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:17,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981791890] [2019-10-13 20:05:17,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:17,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:17,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:17,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:17,913 INFO L87 Difference]: Start difference. First operand 2153 states and 3070 transitions. Second operand 6 states. [2019-10-13 20:05:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:20,743 INFO L93 Difference]: Finished difference Result 8027 states and 14009 transitions. [2019-10-13 20:05:20,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 20:05:20,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-10-13 20:05:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:20,814 INFO L225 Difference]: With dead ends: 8027 [2019-10-13 20:05:20,814 INFO L226 Difference]: Without dead ends: 5880 [2019-10-13 20:05:20,828 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:05:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2019-10-13 20:05:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 5142. [2019-10-13 20:05:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5142 states. [2019-10-13 20:05:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 7403 transitions. [2019-10-13 20:05:21,080 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 7403 transitions. Word has length 140 [2019-10-13 20:05:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:21,082 INFO L462 AbstractCegarLoop]: Abstraction has 5142 states and 7403 transitions. [2019-10-13 20:05:21,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 7403 transitions. [2019-10-13 20:05:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 20:05:21,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:21,090 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:21,091 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash 141894414, now seen corresponding path program 1 times [2019-10-13 20:05:21,091 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:21,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376260450] [2019-10-13 20:05:21,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:21,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:21,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:21,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376260450] [2019-10-13 20:05:21,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971812169] [2019-10-13 20:05:21,299 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 20:05:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:21,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:05:21,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:21,603 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:21,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1169972154] [2019-10-13 20:05:21,777 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 188 [2019-10-13 20:05:21,851 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:05:21,851 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)