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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:24,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:24,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:24,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:24,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:24,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:24,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:24,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:24,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:24,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:24,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:24,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:24,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:24,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:24,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:24,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:24,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:24,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:24,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:24,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:24,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:24,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:24,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:24,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:24,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:24,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:24,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:24,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:24,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:24,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:24,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:24,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:24,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:24,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:24,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:24,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:24,441 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 20:11:24,456 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:24,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:24,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:24,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:24,458 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:24,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:24,458 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:24,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:24,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:24,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:24,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:24,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:24,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:24,460 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:24,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:24,460 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:24,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:24,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:24,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:24,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:24,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:24,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:24,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:24,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:24,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:24,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:24,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:24,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:24,462 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 20:11:24,765 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:24,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:24,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:24,788 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:24,788 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:24,789 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-10-13 20:11:24,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/908e268c8/833602b7f80f4ea08f35cd84a9525a6c/FLAGbd3b66259 [2019-10-13 20:11:25,597 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:25,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-10-13 20:11:25,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/908e268c8/833602b7f80f4ea08f35cd84a9525a6c/FLAGbd3b66259 [2019-10-13 20:11:25,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/908e268c8/833602b7f80f4ea08f35cd84a9525a6c [2019-10-13 20:11:25,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:25,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:25,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:25,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:25,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:25,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:25" (1/1) ... [2019-10-13 20:11:25,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d82875c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:25, skipping insertion in model container [2019-10-13 20:11:25,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:25" (1/1) ... [2019-10-13 20:11:25,790 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:25,920 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:27,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:27,072 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:27,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:27,634 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:27,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27 WrapperNode [2019-10-13 20:11:27,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:27,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:27,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:27,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:27,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (1/1) ... [2019-10-13 20:11:27,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (1/1) ... [2019-10-13 20:11:27,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (1/1) ... [2019-10-13 20:11:27,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (1/1) ... [2019-10-13 20:11:27,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (1/1) ... [2019-10-13 20:11:27,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (1/1) ... [2019-10-13 20:11:27,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (1/1) ... [2019-10-13 20:11:27,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:27,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:27,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:27,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:27,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (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 20:11:28,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:28,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:28,044 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:28,044 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:28,044 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:28,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:28,045 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:28,045 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:28,045 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:28,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:28,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:28,046 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:28,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:28,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:28,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:32,168 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:32,168 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:32,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:32 BoogieIcfgContainer [2019-10-13 20:11:32,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:32,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:32,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:32,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:32,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:25" (1/3) ... [2019-10-13 20:11:32,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274475d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:32, skipping insertion in model container [2019-10-13 20:11:32,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:27" (2/3) ... [2019-10-13 20:11:32,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274475d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:32, skipping insertion in model container [2019-10-13 20:11:32,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:32" (3/3) ... [2019-10-13 20:11:32,191 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label42.c [2019-10-13 20:11:32,203 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:32,215 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:32,227 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:32,272 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:32,272 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:32,273 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:32,273 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:32,273 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:32,273 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:32,274 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:32,274 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 20:11:32,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:32,332 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] [2019-10-13 20:11:32,334 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1002146950, now seen corresponding path program 1 times [2019-10-13 20:11:32,351 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:32,352 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91997138] [2019-10-13 20:11:32,352 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:32,352 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:32,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:32,786 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 20:11:32,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91997138] [2019-10-13 20:11:32,788 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:32,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:32,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401000132] [2019-10-13 20:11:32,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:32,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:32,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:32,816 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:37,415 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:37,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:37,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2019-10-13 20:11:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:37,460 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:37,460 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:37,472 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 20:11:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-13 20:11:37,647 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 55 [2019-10-13 20:11:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:37,649 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-13 20:11:37,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-13 20:11:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 20:11:37,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:37,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:37,667 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:37,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1421869466, now seen corresponding path program 1 times [2019-10-13 20:11:37,670 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:37,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749463064] [2019-10-13 20:11:37,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:37,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:37,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:37,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749463064] [2019-10-13 20:11:37,870 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:37,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:37,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666983303] [2019-10-13 20:11:37,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:37,874 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:37,875 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-13 20:11:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:42,940 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-13 20:11:42,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:42,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-13 20:11:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:42,964 INFO L225 Difference]: With dead ends: 4294 [2019-10-13 20:11:42,964 INFO L226 Difference]: Without dead ends: 2888 [2019-10-13 20:11:42,970 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 20:11:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-13 20:11:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-13 20:11:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-13 20:11:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-10-13 20:11:43,099 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 129 [2019-10-13 20:11:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:43,102 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-10-13 20:11:43,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-10-13 20:11:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:11:43,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:43,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:43,108 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1325380034, now seen corresponding path program 1 times [2019-10-13 20:11:43,110 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:43,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394278034] [2019-10-13 20:11:43,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:43,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:43,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:43,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394278034] [2019-10-13 20:11:43,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:43,339 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:43,339 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489906125] [2019-10-13 20:11:43,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:43,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:43,347 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-10-13 20:11:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:47,994 INFO L93 Difference]: Finished difference Result 7205 states and 11771 transitions. [2019-10-13 20:11:47,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:47,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-13 20:11:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:48,024 INFO L225 Difference]: With dead ends: 7205 [2019-10-13 20:11:48,024 INFO L226 Difference]: Without dead ends: 4347 [2019-10-13 20:11:48,031 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 20:11:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-10-13 20:11:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-10-13 20:11:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-10-13 20:11:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-10-13 20:11:48,161 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 141 [2019-10-13 20:11:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:48,162 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-10-13 20:11:48,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-10-13 20:11:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 20:11:48,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:48,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:48,165 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:48,166 INFO L82 PathProgramCache]: Analyzing trace with hash 163779891, now seen corresponding path program 1 times [2019-10-13 20:11:48,166 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:48,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189582942] [2019-10-13 20:11:48,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:48,167 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:48,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:48,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189582942] [2019-10-13 20:11:48,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70355676] [2019-10-13 20:11:48,364 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 20:11:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:48,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:11:48,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:48,592 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:48,677 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:11:48,677 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-13 20:11:48,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949841655] [2019-10-13 20:11:48,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:48,679 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:48,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:48,681 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 4 states. [2019-10-13 20:11:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:54,852 INFO L93 Difference]: Finished difference Result 15774 states and 22539 transitions. [2019-10-13 20:11:54,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:54,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 20:11:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:54,909 INFO L225 Difference]: With dead ends: 15774 [2019-10-13 20:11:54,909 INFO L226 Difference]: Without dead ends: 11449 [2019-10-13 20:11:54,921 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 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 20:11:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11449 states. [2019-10-13 20:11:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11449 to 10040. [2019-10-13 20:11:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10040 states. [2019-10-13 20:11:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 13191 transitions. [2019-10-13 20:11:55,182 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 13191 transitions. Word has length 166 [2019-10-13 20:11:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:55,184 INFO L462 AbstractCegarLoop]: Abstraction has 10040 states and 13191 transitions. [2019-10-13 20:11:55,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 13191 transitions. [2019-10-13 20:11:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-13 20:11:55,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:55,192 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:55,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:11:55,400 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:55,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1744081679, now seen corresponding path program 1 times [2019-10-13 20:11:55,401 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:55,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62762373] [2019-10-13 20:11:55,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:55,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:55,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:55,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62762373] [2019-10-13 20:11:55,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584755513] [2019-10-13 20:11:55,606 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 20:11:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:55,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:11:55,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 20:11:55,858 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:55,994 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:11:55,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-13 20:11:55,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686561002] [2019-10-13 20:11:55,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:55,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:55,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:55,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:55,997 INFO L87 Difference]: Start difference. First operand 10040 states and 13191 transitions. Second operand 5 states. [2019-10-13 20:12:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:01,023 INFO L93 Difference]: Finished difference Result 20276 states and 26977 transitions. [2019-10-13 20:12:01,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:01,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2019-10-13 20:12:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:01,089 INFO L225 Difference]: With dead ends: 20276 [2019-10-13 20:12:01,089 INFO L226 Difference]: Without dead ends: 10242 [2019-10-13 20:12:01,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 395 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:12:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states.