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/Problem18_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:37,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:37,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:37,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:37,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:37,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:37,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:37,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:37,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:37,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:37,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:37,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:37,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:37,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:37,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:37,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:37,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:37,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:37,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:37,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:37,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:37,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:37,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:37,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:37,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:10:37,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:10:37,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:10:37,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:10:37,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:10:37,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:10:37,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:37,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:37,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:37,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:37,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:37,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:37,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:37,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:37,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:37,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:37,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:37,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:10:37,452 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:37,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:37,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:37,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:37,454 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:37,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:37,455 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:37,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:37,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:37,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:37,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:37,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:37,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:37,456 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:37,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:37,456 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:37,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:37,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:37,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:37,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:37,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:37,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:37,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:37,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:37,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:37,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:37,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:37,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:37,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:10:37,736 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:37,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:37,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:37,755 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:37,755 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:37,756 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-10-13 20:10:37,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d8fa7f9/550567e5b1344d02ac4d0a395d4685b4/FLAG58f66c48e [2019-10-13 20:10:38,520 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:38,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-10-13 20:10:38,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d8fa7f9/550567e5b1344d02ac4d0a395d4685b4/FLAG58f66c48e [2019-10-13 20:10:38,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d8fa7f9/550567e5b1344d02ac4d0a395d4685b4 [2019-10-13 20:10:38,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:38,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:38,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:38,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:38,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:38,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:38" (1/1) ... [2019-10-13 20:10:38,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27396f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:38, skipping insertion in model container [2019-10-13 20:10:38,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:38" (1/1) ... [2019-10-13 20:10:38,704 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:38,826 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:40,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:40,214 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:40,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:40,703 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:40,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40 WrapperNode [2019-10-13 20:10:40,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:40,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:40,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:40,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:40,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (1/1) ... [2019-10-13 20:10:40,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (1/1) ... [2019-10-13 20:10:40,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (1/1) ... [2019-10-13 20:10:40,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (1/1) ... [2019-10-13 20:10:40,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (1/1) ... [2019-10-13 20:10:40,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (1/1) ... [2019-10-13 20:10:40,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (1/1) ... [2019-10-13 20:10:41,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:41,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:41,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:41,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:10:41,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:41,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:10:41,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:10:41,087 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:10:41,087 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:10:41,087 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:10:41,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:10:41,087 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:10:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:10:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:10:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:10:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:10:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:10:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:10:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:10:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:10:44,869 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:10:44,870 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:10:44,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:44 BoogieIcfgContainer [2019-10-13 20:10:44,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:10:44,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:10:44,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:10:44,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:10:44,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:38" (1/3) ... [2019-10-13 20:10:44,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfb1419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:44, skipping insertion in model container [2019-10-13 20:10:44,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:40" (2/3) ... [2019-10-13 20:10:44,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfb1419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:44, skipping insertion in model container [2019-10-13 20:10:44,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:44" (3/3) ... [2019-10-13 20:10:44,881 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label12.c [2019-10-13 20:10:44,892 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:10:44,902 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:10:44,914 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:10:44,947 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:10:44,947 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:10:44,947 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:10:44,947 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:10:44,948 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:10:44,948 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:10:44,948 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:10:44,948 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:10:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:10:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 20:10:44,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:44,990 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] [2019-10-13 20:10:44,993 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:44,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1916525318, now seen corresponding path program 1 times [2019-10-13 20:10:45,008 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:45,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460614478] [2019-10-13 20:10:45,009 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:45,009 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:45,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:45,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460614478] [2019-10-13 20:10:45,256 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:45,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:10:45,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396813298] [2019-10-13 20:10:45,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:10:45,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:10:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:10:45,283 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:10:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:49,955 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:10:49,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:10:49,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-13 20:10:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:49,990 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:10:49,991 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:10:50,005 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 [2019-10-13 20:10:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:10:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:10:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:10:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-13 20:10:50,206 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 23 [2019-10-13 20:10:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:50,206 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-13 20:10:50,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:10:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-13 20:10:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 20:10:50,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:50,212 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:10:50,213 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash -234642970, now seen corresponding path program 1 times [2019-10-13 20:10:50,213 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:50,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104243554] [2019-10-13 20:10:50,214 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:50,214 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:50,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:50,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104243554] [2019-10-13 20:10:50,527 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:50,527 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:50,527 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757491886] [2019-10-13 20:10:50,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:50,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:50,533 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-13 20:10:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:55,756 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-13 20:10:55,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:55,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-10-13 20:10:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:55,779 INFO L225 Difference]: With dead ends: 4294 [2019-10-13 20:10:55,779 INFO L226 Difference]: Without dead ends: 2888 [2019-10-13 20:10:55,784 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:10:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-13 20:10:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-13 20:10:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-13 20:10:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-10-13 20:10:55,890 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 97 [2019-10-13 20:10:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:55,891 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-10-13 20:10:55,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-10-13 20:10:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 20:10:55,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:55,904 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:10:55,905 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash -127512130, now seen corresponding path program 1 times [2019-10-13 20:10:55,906 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:55,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126773774] [2019-10-13 20:10:55,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:55,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:55,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:56,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126773774] [2019-10-13 20:10:56,117 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:56,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:56,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186570893] [2019-10-13 20:10:56,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:56,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:56,119 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-10-13 20:11:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:00,939 INFO L93 Difference]: Finished difference Result 7205 states and 11771 transitions. [2019-10-13 20:11:00,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:00,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-13 20:11:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:00,974 INFO L225 Difference]: With dead ends: 7205 [2019-10-13 20:11:00,974 INFO L226 Difference]: Without dead ends: 4347 [2019-10-13 20:11:00,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-10-13 20:11:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-10-13 20:11:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-10-13 20:11:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-10-13 20:11:01,115 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 109 [2019-10-13 20:11:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:01,117 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-10-13 20:11:01,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-10-13 20:11:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:11:01,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:01,127 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:11:01,127 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1618208947, now seen corresponding path program 1 times [2019-10-13 20:11:01,128 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:01,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917639900] [2019-10-13 20:11:01,129 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:01,129 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:01,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:01,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917639900] [2019-10-13 20:11:01,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639948845] [2019-10-13 20:11:01,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:11:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:01,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:11:01,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:01,587 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:01,651 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:11:01,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-13 20:11:01,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755764295] [2019-10-13 20:11:01,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:01,655 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:01,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:01,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:01,656 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 4 states. [2019-10-13 20:11:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:07,694 INFO L93 Difference]: Finished difference Result 15785 states and 22608 transitions. [2019-10-13 20:11:07,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:07,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-10-13 20:11:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:07,753 INFO L225 Difference]: With dead ends: 15785 [2019-10-13 20:11:07,753 INFO L226 Difference]: Without dead ends: 11460 [2019-10-13 20:11:07,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-10-13 20:11:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 10758. [2019-10-13 20:11:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10758 states. [2019-10-13 20:11:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 14648 transitions. [2019-10-13 20:11:08,058 INFO L78 Accepts]: Start accepts. Automaton has 10758 states and 14648 transitions. Word has length 134 [2019-10-13 20:11:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:08,060 INFO L462 AbstractCegarLoop]: Abstraction has 10758 states and 14648 transitions. [2019-10-13 20:11:08,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10758 states and 14648 transitions. [2019-10-13 20:11:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 20:11:08,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:08,063 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:11:08,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:11:08,268 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:08,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:08,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1383176335, now seen corresponding path program 1 times [2019-10-13 20:11:08,269 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:08,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679916992] [2019-10-13 20:11:08,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:08,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:08,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:08,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679916992] [2019-10-13 20:11:08,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397543912] [2019-10-13 20:11:08,404 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 [2019-10-13 20:11:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:08,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:11:08,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 20:11:08,579 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:08,765 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:11:08,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-13 20:11:08,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339337055] [2019-10-13 20:11:08,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:08,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:08,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:08,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:08,767 INFO L87 Difference]: Start difference. First operand 10758 states and 14648 transitions. Second operand 5 states. [2019-10-13 20:11:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:13,560 INFO L93 Difference]: Finished difference Result 21713 states and 30030 transitions. [2019-10-13 20:11:13,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:13,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2019-10-13 20:11:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:13,624 INFO L225 Difference]: With dead ends: 21713 [2019-10-13 20:11:13,625 INFO L226 Difference]: Without dead ends: 10961 [2019-10-13 20:11:13,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 331 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:11:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10961 states. [2019-10-13 20:11:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10961 to 10163. [2019-10-13 20:11:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10163 states. [2019-10-13 20:11:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 13035 transitions. [2019-10-13 20:11:13,890 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 13035 transitions. Word has length 168 [2019-10-13 20:11:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:13,892 INFO L462 AbstractCegarLoop]: Abstraction has 10163 states and 13035 transitions. [2019-10-13 20:11:13,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:11:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 13035 transitions. [2019-10-13 20:11:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-13 20:11:13,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:13,898 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:14,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:11:14,111 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1478446898, now seen corresponding path program 1 times [2019-10-13 20:11:14,115 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:14,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026381675] [2019-10-13 20:11:14,116 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:14,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:14,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:14,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026381675] [2019-10-13 20:11:14,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514451264] [2019-10-13 20:11:14,311 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 [2019-10-13 20:11:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:14,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:11:14,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:14,497 INFO L321 TraceCheckSpWp]: Computing backward predicates...