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/Problem03_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:40,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:40,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:40,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:40,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:40,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:40,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:40,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:40,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:40,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:40,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:40,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:40,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:40,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:40,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:40,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:40,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:40,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:40,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:40,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:40,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:40,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:40,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:40,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:40,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:58:40,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:58:40,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:58:40,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:58:40,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:58:40,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:58:40,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:40,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:40,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:40,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:40,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:40,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:40,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:40,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:40,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:40,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:40,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:40,368 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 23:58:40,395 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:40,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:40,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:40,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:40,398 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:40,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:40,399 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:40,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:40,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:40,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:40,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:40,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:40,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:40,400 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:40,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:40,401 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:40,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:40,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:40,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:40,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:40,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:40,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:40,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:40,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:40,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:40,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:40,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:40,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:40,403 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 23:58:40,681 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:40,695 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:40,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:40,700 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:40,701 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:40,702 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-10-14 23:58:40,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930b66c8e/c885b1aa22ab423a9475a4aa92a7c17b/FLAG784511b2f [2019-10-14 23:58:41,428 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:41,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-10-14 23:58:41,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930b66c8e/c885b1aa22ab423a9475a4aa92a7c17b/FLAG784511b2f [2019-10-14 23:58:41,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930b66c8e/c885b1aa22ab423a9475a4aa92a7c17b [2019-10-14 23:58:41,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:41,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:41,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:41,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:41,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:41,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:41" (1/1) ... [2019-10-14 23:58:41,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5171f16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:41, skipping insertion in model container [2019-10-14 23:58:41,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:41" (1/1) ... [2019-10-14 23:58:41,655 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:41,734 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:42,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:42,652 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:42,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:42,914 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:42,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42 WrapperNode [2019-10-14 23:58:42,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:42,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:42,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:42,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:42,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (1/1) ... [2019-10-14 23:58:42,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (1/1) ... [2019-10-14 23:58:42,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (1/1) ... [2019-10-14 23:58:42,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (1/1) ... [2019-10-14 23:58:43,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (1/1) ... [2019-10-14 23:58:43,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (1/1) ... [2019-10-14 23:58:43,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (1/1) ... [2019-10-14 23:58:43,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:43,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:43,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:43,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:43,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (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 23:58:43,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:43,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:43,213 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:43,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:45,358 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:45,358 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:45,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:45 BoogieIcfgContainer [2019-10-14 23:58:45,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:45,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:45,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:45,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:45,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:41" (1/3) ... [2019-10-14 23:58:45,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3694b503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:45, skipping insertion in model container [2019-10-14 23:58:45,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:42" (2/3) ... [2019-10-14 23:58:45,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3694b503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:45, skipping insertion in model container [2019-10-14 23:58:45,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:45" (3/3) ... [2019-10-14 23:58:45,381 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2019-10-14 23:58:45,391 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:45,401 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:45,416 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:45,461 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:45,461 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:45,462 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:45,463 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:45,463 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:45,463 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:45,463 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:45,463 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:58:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-14 23:58:45,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:45,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:45,528 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash -181884296, now seen corresponding path program 1 times [2019-10-14 23:58:45,544 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:45,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853337141] [2019-10-14 23:58:45,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:45,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:45,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:46,302 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 23:58:46,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853337141] [2019-10-14 23:58:46,304 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:46,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:58:46,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144112916] [2019-10-14 23:58:46,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:58:46,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:58:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:58:46,329 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2019-10-14 23:58:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:48,535 INFO L93 Difference]: Finished difference Result 1081 states and 1945 transitions. [2019-10-14 23:58:48,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:58:48,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-10-14 23:58:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:48,565 INFO L225 Difference]: With dead ends: 1081 [2019-10-14 23:58:48,565 INFO L226 Difference]: Without dead ends: 690 [2019-10-14 23:58:48,574 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 [2019-10-14 23:58:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-14 23:58:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 461. [2019-10-14 23:58:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2019-10-14 23:58:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 755 transitions. [2019-10-14 23:58:48,665 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 755 transitions. Word has length 157 [2019-10-14 23:58:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:48,667 INFO L462 AbstractCegarLoop]: Abstraction has 461 states and 755 transitions. [2019-10-14 23:58:48,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:58:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 755 transitions. [2019-10-14 23:58:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-14 23:58:48,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:48,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:48,675 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:48,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:48,676 INFO L82 PathProgramCache]: Analyzing trace with hash 752192065, now seen corresponding path program 1 times [2019-10-14 23:58:48,676 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:48,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695286799] [2019-10-14 23:58:48,676 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:48,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:48,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:48,898 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 23:58:48,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695286799] [2019-10-14 23:58:48,899 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:48,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:58:48,900 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499067060] [2019-10-14 23:58:48,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:58:48,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:48,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:58:48,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:58:48,908 INFO L87 Difference]: Start difference. First operand 461 states and 755 transitions. Second operand 5 states. [2019-10-14 23:58:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:50,278 INFO L93 Difference]: Finished difference Result 1364 states and 2274 transitions. [2019-10-14 23:58:50,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:50,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2019-10-14 23:58:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:50,287 INFO L225 Difference]: With dead ends: 1364 [2019-10-14 23:58:50,287 INFO L226 Difference]: Without dead ends: 909 [2019-10-14 23:58:50,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:58:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2019-10-14 23:58:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 682. [2019-10-14 23:58:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-14 23:58:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1077 transitions. [2019-10-14 23:58:50,340 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1077 transitions. Word has length 167 [2019-10-14 23:58:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:50,340 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1077 transitions. [2019-10-14 23:58:50,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:58:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1077 transitions. [2019-10-14 23:58:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-14 23:58:50,346 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:50,346 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:50,346 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash 519491724, now seen corresponding path program 1 times [2019-10-14 23:58:50,347 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:50,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845036106] [2019-10-14 23:58:50,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:50,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:50,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:50,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845036106] [2019-10-14 23:58:50,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161784467] [2019-10-14 23:58:50,599 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 23:58:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:50,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:50,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:50,908 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:50,980 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:50,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-14 23:58:50,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164049868] [2019-10-14 23:58:50,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:50,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:50,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:50,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:58:50,982 INFO L87 Difference]: Start difference. First operand 682 states and 1077 transitions. Second operand 3 states. [2019-10-14 23:58:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:52,069 INFO L93 Difference]: Finished difference Result 1989 states and 3205 transitions. [2019-10-14 23:58:52,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:52,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2019-10-14 23:58:52,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:52,087 INFO L225 Difference]: With dead ends: 1989 [2019-10-14 23:58:52,087 INFO L226 Difference]: Without dead ends: 1313 [2019-10-14 23:58:52,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:58:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2019-10-14 23:58:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1101. [2019-10-14 23:58:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2019-10-14 23:58:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1581 transitions. [2019-10-14 23:58:52,149 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1581 transitions. Word has length 169 [2019-10-14 23:58:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:52,150 INFO L462 AbstractCegarLoop]: Abstraction has 1101 states and 1581 transitions. [2019-10-14 23:58:52,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1581 transitions. [2019-10-14 23:58:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-14 23:58:52,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:52,157 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:52,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:52,364 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:52,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1544066575, now seen corresponding path program 1 times [2019-10-14 23:58:52,366 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:52,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386620907] [2019-10-14 23:58:52,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:52,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:52,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:52,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386620907] [2019-10-14 23:58:52,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:52,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:52,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242055353] [2019-10-14 23:58:52,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:52,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:52,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:52,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:52,618 INFO L87 Difference]: Start difference. First operand 1101 states and 1581 transitions. Second operand 6 states. [2019-10-14 23:58:54,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:54,135 INFO L93 Difference]: Finished difference Result 3344 states and 5077 transitions. [2019-10-14 23:58:54,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:54,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 218 [2019-10-14 23:58:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:54,153 INFO L225 Difference]: With dead ends: 3344 [2019-10-14 23:58:54,154 INFO L226 Difference]: Without dead ends: 2249 [2019-10-14 23:58:54,159 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 23:58:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2019-10-14 23:58:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2212. [2019-10-14 23:58:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-10-14 23:58:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3152 transitions. [2019-10-14 23:58:54,254 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3152 transitions. Word has length 218 [2019-10-14 23:58:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:54,254 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 3152 transitions. [2019-10-14 23:58:54,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3152 transitions. [2019-10-14 23:58:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-10-14 23:58:54,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:54,264 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:54,265 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash 661081392, now seen corresponding path program 1 times [2019-10-14 23:58:54,266 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:54,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611821226] [2019-10-14 23:58:54,266 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:54,266 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:54,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:54,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611821226] [2019-10-14 23:58:54,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401783341] [2019-10-14 23:58:54,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:54,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:58:54,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 23:58:54,869 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:55,039 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:58:55,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-14 23:58:55,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598644946] [2019-10-14 23:58:55,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:58:55,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:55,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:58:55,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:58:55,042 INFO L87 Difference]: Start difference. First operand 2212 states and 3152 transitions. Second operand 5 states. [2019-10-14 23:58:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:56,534 INFO L93 Difference]: Finished difference Result 6438 states and 9723 transitions. [2019-10-14 23:58:56,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:56,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2019-10-14 23:58:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:56,569 INFO L225 Difference]: With dead ends: 6438 [2019-10-14 23:58:56,569 INFO L226 Difference]: Without dead ends: 4232 [2019-10-14 23:58:56,579 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 501 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:58:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2019-10-14 23:58:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3972. [2019-10-14 23:58:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3972 states. [2019-10-14 23:58:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 5556 transitions. [2019-10-14 23:58:56,741 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 5556 transitions. Word has length 253 [2019-10-14 23:58:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:56,742 INFO L462 AbstractCegarLoop]: Abstraction has 3972 states and 5556 transitions. [2019-10-14 23:58:56,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:58:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 5556 transitions. [2019-10-14 23:58:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-10-14 23:58:56,759 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:56,760 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:56,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:56,965 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1003600938, now seen corresponding path program 1 times [2019-10-14 23:58:56,967 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:56,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190753697] [2019-10-14 23:58:56,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:56,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:56,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 89 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:57,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190753697] [2019-10-14 23:58:57,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23375816] [2019-10-14 23:58:57,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:57,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:57,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:57,676 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:57,793 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:57,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-14 23:58:57,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412633781] [2019-10-14 23:58:57,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:57,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:57,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:58:57,806 INFO L87 Difference]: Start difference. First operand 3972 states and 5556 transitions. Second operand 3 states. [2019-10-14 23:58:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:59,023 INFO L93 Difference]: Finished difference Result 9850 states and 14284 transitions. [2019-10-14 23:58:59,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:59,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2019-10-14 23:58:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:59,065 INFO L225 Difference]: With dead ends: 9850 [2019-10-14 23:58:59,065 INFO L226 Difference]: Without dead ends: 5884 [2019-10-14 23:58:59,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 514 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:58:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5884 states. [2019-10-14 23:58:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5884 to 5881. [2019-10-14 23:58:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5881 states. [2019-10-14 23:58:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5881 states to 5881 states and 8431 transitions. [2019-10-14 23:58:59,249 INFO L78 Accepts]: Start accepts. Automaton has 5881 states and 8431 transitions. Word has length 257 [2019-10-14 23:58:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:59,250 INFO L462 AbstractCegarLoop]: Abstraction has 5881 states and 8431 transitions. [2019-10-14 23:58:59,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5881 states and 8431 transitions. [2019-10-14 23:58:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2019-10-14 23:58:59,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:59,275 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:59,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:59,484 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:59,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2045887005, now seen corresponding path program 1 times [2019-10-14 23:58:59,485 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:59,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172527982] [2019-10-14 23:58:59,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:59,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:59,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:59,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172527982] [2019-10-14 23:58:59,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460792341] [2019-10-14 23:58:59,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:00,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:00,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 23:59:00,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 23:59:00,303 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:59:00,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:59:00,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453393104] [2019-10-14 23:59:00,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:00,305 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:00,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:00,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:59:00,306 INFO L87 Difference]: Start difference. First operand 5881 states and 8431 transitions. Second operand 3 states. [2019-10-14 23:59:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:01,382 INFO L93 Difference]: Finished difference Result 17011 states and 24576 transitions. [2019-10-14 23:59:01,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:01,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2019-10-14 23:59:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:01,457 INFO L225 Difference]: With dead ends: 17011 [2019-10-14 23:59:01,458 INFO L226 Difference]: Without dead ends: 11136 [2019-10-14 23:59:01,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 596 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:59:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11136 states. [2019-10-14 23:59:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11136 to 10910. [2019-10-14 23:59:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10910 states. [2019-10-14 23:59:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10910 states to 10910 states and 15525 transitions. [2019-10-14 23:59:01,897 INFO L78 Accepts]: Start accepts. Automaton has 10910 states and 15525 transitions. Word has length 299 [2019-10-14 23:59:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:01,898 INFO L462 AbstractCegarLoop]: Abstraction has 10910 states and 15525 transitions. [2019-10-14 23:59:01,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 10910 states and 15525 transitions. [2019-10-14 23:59:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-10-14 23:59:01,954 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:01,955 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:59:02,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:02,161 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:02,162 INFO L82 PathProgramCache]: Analyzing trace with hash -58068566, now seen corresponding path program 1 times [2019-10-14 23:59:02,162 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:02,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933629708] [2019-10-14 23:59:02,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:02,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:02,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:02,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933629708] [2019-10-14 23:59:02,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703155114] [2019-10-14 23:59:02,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:02,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:02,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:02,960 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:03,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1172686449] [2019-10-14 23:59:03,116 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 316 [2019-10-14 23:59:03,175 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:59:03,175 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)