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/Problem02_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:57:18,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:57:18,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:57:18,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:57:18,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:57:18,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:57:18,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:57:18,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:57:18,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:57:18,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:57:18,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:57:18,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:57:18,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:57:18,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:57:18,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:57:18,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:57:18,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:57:18,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:57:18,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:57:18,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:57:18,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:57:18,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:57:18,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:57:18,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:57:18,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:57:18,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:57:18,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:57:18,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:57:18,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:57:18,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:57:18,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:57:18,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:57:18,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:57:18,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:57:18,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:57:18,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:57:18,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:57:18,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:57:18,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:57:18,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:57:18,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:57:18,337 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 23:57:18,352 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:57:18,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:57:18,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:57:18,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:57:18,353 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:57:18,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:57:18,354 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:57:18,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:57:18,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:57:18,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:57:18,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:57:18,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:57:18,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:57:18,357 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:57:18,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:57:18,357 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:57:18,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:57:18,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:57:18,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:57:18,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:57:18,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:57:18,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:57:18,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:57:18,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:57:18,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:57:18,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:57:18,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:57:18,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:57:18,360 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 23:57:18,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:57:18,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:57:18,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:57:18,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:57:18,705 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:57:18,706 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label42.c [2019-10-14 23:57:18,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d3d8e2f/b88d797db3744dfd9cba73ba33bc7398/FLAGd981f7284 [2019-10-14 23:57:19,313 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:57:19,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label42.c [2019-10-14 23:57:19,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d3d8e2f/b88d797db3744dfd9cba73ba33bc7398/FLAGd981f7284 [2019-10-14 23:57:19,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d3d8e2f/b88d797db3744dfd9cba73ba33bc7398 [2019-10-14 23:57:19,625 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:57:19,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:57:19,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:19,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:57:19,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:57:19,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:19" (1/1) ... [2019-10-14 23:57:19,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:19, skipping insertion in model container [2019-10-14 23:57:19,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:19" (1/1) ... [2019-10-14 23:57:19,645 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:57:19,706 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:57:20,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:20,326 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:57:20,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:20,450 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:57:20,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20 WrapperNode [2019-10-14 23:57:20,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:20,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:57:20,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:57:20,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:57:20,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2019-10-14 23:57:20,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2019-10-14 23:57:20,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2019-10-14 23:57:20,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2019-10-14 23:57:20,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2019-10-14 23:57:20,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2019-10-14 23:57:20,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2019-10-14 23:57:20,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:57:20,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:57:20,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:57:20,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:57:20,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (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 23:57:20,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:57:20,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:57:20,614 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:57:20,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:57:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:57:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:57:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:57:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:57:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:57:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:57:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:57:21,799 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:57:21,799 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:57:21,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:21 BoogieIcfgContainer [2019-10-14 23:57:21,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:57:21,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:57:21,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:57:21,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:57:21,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:19" (1/3) ... [2019-10-14 23:57:21,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10afa6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:21, skipping insertion in model container [2019-10-14 23:57:21,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (2/3) ... [2019-10-14 23:57:21,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10afa6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:21, skipping insertion in model container [2019-10-14 23:57:21,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:21" (3/3) ... [2019-10-14 23:57:21,813 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label42.c [2019-10-14 23:57:21,823 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:57:21,832 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:57:21,844 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:57:21,875 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:57:21,875 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:57:21,876 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:57:21,876 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:57:21,876 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:57:21,876 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:57:21,877 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:57:21,877 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:57:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:57:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:57:21,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:21,920 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, 1, 1, 1, 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 23:57:21,923 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:21,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1304641474, now seen corresponding path program 1 times [2019-10-14 23:57:21,937 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:21,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720382930] [2019-10-14 23:57:21,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:21,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:21,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:22,430 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 23:57:22,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720382930] [2019-10-14 23:57:22,432 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:22,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:22,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083477446] [2019-10-14 23:57:22,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:22,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:22,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:22,460 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:57:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:23,358 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-10-14 23:57:23,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:23,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2019-10-14 23:57:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:23,389 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:57:23,390 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:57:23,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 23:57:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:57:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:57:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:57:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-10-14 23:57:23,525 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 106 [2019-10-14 23:57:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:23,526 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-10-14 23:57:23,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-10-14 23:57:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 23:57:23,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:23,543 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:23,543 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -191835239, now seen corresponding path program 1 times [2019-10-14 23:57:23,545 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:23,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736430930] [2019-10-14 23:57:23,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:23,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:23,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:23,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736430930] [2019-10-14 23:57:23,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:23,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:23,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547059649] [2019-10-14 23:57:23,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:23,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:23,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:23,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:23,758 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 3 states. [2019-10-14 23:57:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:24,313 INFO L93 Difference]: Finished difference Result 931 states and 1377 transitions. [2019-10-14 23:57:24,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:24,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-10-14 23:57:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:24,319 INFO L225 Difference]: With dead ends: 931 [2019-10-14 23:57:24,319 INFO L226 Difference]: Without dead ends: 617 [2019-10-14 23:57:24,321 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 23:57:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2019-10-14 23:57:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 612. [2019-10-14 23:57:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-14 23:57:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 857 transitions. [2019-10-14 23:57:24,360 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 857 transitions. Word has length 114 [2019-10-14 23:57:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:24,361 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 857 transitions. [2019-10-14 23:57:24,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 857 transitions. [2019-10-14 23:57:24,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:57:24,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:24,364 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:24,365 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:24,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1963401651, now seen corresponding path program 1 times [2019-10-14 23:57:24,368 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:24,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618265578] [2019-10-14 23:57:24,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:24,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:24,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:24,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618265578] [2019-10-14 23:57:24,674 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:24,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:57:24,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48262020] [2019-10-14 23:57:24,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:57:24,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:57:24,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:57:24,676 INFO L87 Difference]: Start difference. First operand 612 states and 857 transitions. Second operand 5 states. [2019-10-14 23:57:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:25,452 INFO L93 Difference]: Finished difference Result 1301 states and 1873 transitions. [2019-10-14 23:57:25,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:57:25,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2019-10-14 23:57:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:25,458 INFO L225 Difference]: With dead ends: 1301 [2019-10-14 23:57:25,458 INFO L226 Difference]: Without dead ends: 612 [2019-10-14 23:57:25,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:57:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-14 23:57:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-14 23:57:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-14 23:57:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 847 transitions. [2019-10-14 23:57:25,483 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 847 transitions. Word has length 120 [2019-10-14 23:57:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:25,483 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 847 transitions. [2019-10-14 23:57:25,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:57:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 847 transitions. [2019-10-14 23:57:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 23:57:25,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:25,486 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:25,486 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1978192554, now seen corresponding path program 1 times [2019-10-14 23:57:25,487 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:25,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194417591] [2019-10-14 23:57:25,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:25,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:25,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:25,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194417591] [2019-10-14 23:57:25,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:25,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:57:25,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083692386] [2019-10-14 23:57:25,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:57:25,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:25,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:57:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:57:25,588 INFO L87 Difference]: Start difference. First operand 612 states and 847 transitions. Second operand 6 states. [2019-10-14 23:57:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:26,391 INFO L93 Difference]: Finished difference Result 1243 states and 1739 transitions. [2019-10-14 23:57:26,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:57:26,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2019-10-14 23:57:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:26,396 INFO L225 Difference]: With dead ends: 1243 [2019-10-14 23:57:26,396 INFO L226 Difference]: Without dead ends: 637 [2019-10-14 23:57:26,398 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 23:57:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2019-10-14 23:57:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 628. [2019-10-14 23:57:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-10-14 23:57:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 835 transitions. [2019-10-14 23:57:26,427 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 835 transitions. Word has length 128 [2019-10-14 23:57:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:26,427 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 835 transitions. [2019-10-14 23:57:26,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:57:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 835 transitions. [2019-10-14 23:57:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:57:26,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:26,430 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:26,430 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1553171855, now seen corresponding path program 1 times [2019-10-14 23:57:26,431 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:26,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619668392] [2019-10-14 23:57:26,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:26,432 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:26,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:26,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619668392] [2019-10-14 23:57:26,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083651924] [2019-10-14 23:57:26,549 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 23:57:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:26,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:57:26,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:57:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:26,784 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:57:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:26,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1614233751] [2019-10-14 23:57:26,922 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 137 [2019-10-14 23:57:26,971 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:57:26,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)