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 0.1.24-13a467a-m [2019-10-15 00:09:35,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:35,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:35,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:35,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:35,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:35,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:35,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:35,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:35,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:35,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:35,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:35,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:35,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:35,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:35,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:35,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:35,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:35,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:35,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:35,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:35,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:35,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:35,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:35,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:35,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:09:35,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:09:35,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:09:35,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:09:35,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:09:35,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:09:35,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:09:35,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:09:35,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:35,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:35,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:35,465 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 [2019-10-15 00:09:35,487 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:35,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:35,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:35,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:35,490 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:35,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:35,490 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:35,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:35,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:35,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:35,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:35,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:35,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:35,493 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:35,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:35,493 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:35,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:35,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:35,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:35,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:35,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:35,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:35,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:35,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:35,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:35,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:35,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:35,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:35,496 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 [2019-10-15 00:09:35,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:35,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:35,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:35,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:35,812 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:35,813 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-10-15 00:09:35,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368e81300/5649441030974fc1bcf6f2248d27cab5/FLAG401104890 [2019-10-15 00:09:36,625 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:36,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-10-15 00:09:36,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368e81300/5649441030974fc1bcf6f2248d27cab5/FLAG401104890 [2019-10-15 00:09:36,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368e81300/5649441030974fc1bcf6f2248d27cab5 [2019-10-15 00:09:36,733 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:36,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:36,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:36,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:36,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:36,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:36" (1/1) ... [2019-10-15 00:09:36,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b0106d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:36, skipping insertion in model container [2019-10-15 00:09:36,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:36" (1/1) ... [2019-10-15 00:09:36,757 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:36,883 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:38,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:38,043 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:38,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:38,632 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:38,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38 WrapperNode [2019-10-15 00:09:38,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:38,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:38,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:38,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:38,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (1/1) ... [2019-10-15 00:09:38,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (1/1) ... [2019-10-15 00:09:38,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (1/1) ... [2019-10-15 00:09:38,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (1/1) ... [2019-10-15 00:09:38,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (1/1) ... [2019-10-15 00:09:38,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (1/1) ... [2019-10-15 00:09:38,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (1/1) ... [2019-10-15 00:09:38,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:38,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:38,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:38,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:38,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (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 [2019-10-15 00:09:38,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:38,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:38,942 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:38,942 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:38,943 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:09:38,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:09:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:38,945 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:38,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:42,791 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:42,791 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:42,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:42 BoogieIcfgContainer [2019-10-15 00:09:42,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:42,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:42,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:42,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:42,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:36" (1/3) ... [2019-10-15 00:09:42,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a692860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:42, skipping insertion in model container [2019-10-15 00:09:42,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:38" (2/3) ... [2019-10-15 00:09:42,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a692860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:42, skipping insertion in model container [2019-10-15 00:09:42,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:42" (3/3) ... [2019-10-15 00:09:42,803 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label12.c [2019-10-15 00:09:42,815 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:42,824 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:42,839 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:42,879 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:42,879 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:42,879 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:42,879 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:42,880 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:42,880 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:42,880 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:42,880 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:09:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 00:09:42,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:42,932 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] [2019-10-15 00:09:42,934 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:42,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1916525318, now seen corresponding path program 1 times [2019-10-15 00:09:42,952 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:42,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148755265] [2019-10-15 00:09:42,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:42,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:42,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:43,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148755265] [2019-10-15 00:09:43,251 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:43,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:43,252 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149760952] [2019-10-15 00:09:43,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:43,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:43,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:43,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:43,276 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:09:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:47,819 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:09:47,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:47,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-15 00:09:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:47,856 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:09:47,857 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:09:47,868 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 [2019-10-15 00:09:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:09:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:09:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:09:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-15 00:09:48,003 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 23 [2019-10-15 00:09:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:48,003 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-15 00:09:48,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-15 00:09:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-15 00:09:48,009 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:48,009 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] [2019-10-15 00:09:48,009 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash -234642970, now seen corresponding path program 1 times [2019-10-15 00:09:48,010 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:48,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736468255] [2019-10-15 00:09:48,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:48,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:48,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:48,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736468255] [2019-10-15 00:09:48,245 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:48,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:48,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065864294] [2019-10-15 00:09:48,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:48,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:48,250 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-15 00:09:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:53,866 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-15 00:09:53,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:53,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-10-15 00:09:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:53,892 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:09:53,892 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:09:53,896 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 [2019-10-15 00:09:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:09:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-15 00:09:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:09:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-10-15 00:09:54,004 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 97 [2019-10-15 00:09:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:54,005 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-10-15 00:09:54,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-10-15 00:09:54,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 00:09:54,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:54,018 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] [2019-10-15 00:09:54,018 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash -127512130, now seen corresponding path program 1 times [2019-10-15 00:09:54,020 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:54,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648432713] [2019-10-15 00:09:54,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:54,021 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:54,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:54,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648432713] [2019-10-15 00:09:54,229 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:54,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:54,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122951645] [2019-10-15 00:09:54,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:54,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:54,237 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-10-15 00:09:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:59,161 INFO L93 Difference]: Finished difference Result 7205 states and 11771 transitions. [2019-10-15 00:09:59,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:59,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-15 00:09:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:59,189 INFO L225 Difference]: With dead ends: 7205 [2019-10-15 00:09:59,190 INFO L226 Difference]: Without dead ends: 4347 [2019-10-15 00:09:59,196 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 [2019-10-15 00:09:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-10-15 00:09:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-10-15 00:09:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-10-15 00:09:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-10-15 00:09:59,304 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 109 [2019-10-15 00:09:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:59,305 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-10-15 00:09:59,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-10-15 00:09:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 00:09:59,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:59,307 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] [2019-10-15 00:09:59,307 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:59,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1618208947, now seen corresponding path program 1 times [2019-10-15 00:09:59,308 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:59,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653189086] [2019-10-15 00:09:59,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:59,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:59,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:59,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653189086] [2019-10-15 00:09:59,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870832522] [2019-10-15 00:09:59,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-15 00:09:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:59,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:59,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:59,663 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:59,722 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:09:59,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 00:09:59,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989104820] [2019-10-15 00:09:59,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:09:59,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:59,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:09:59,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:59,727 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 4 states. [2019-10-15 00:10:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:06,093 INFO L93 Difference]: Finished difference Result 15785 states and 22608 transitions. [2019-10-15 00:10:06,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:06,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-10-15 00:10:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:06,147 INFO L225 Difference]: With dead ends: 15785 [2019-10-15 00:10:06,147 INFO L226 Difference]: Without dead ends: 11460 [2019-10-15 00:10:06,161 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 [2019-10-15 00:10:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-10-15 00:10:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 10758. [2019-10-15 00:10:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10758 states. [2019-10-15 00:10:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 14648 transitions. [2019-10-15 00:10:06,496 INFO L78 Accepts]: Start accepts. Automaton has 10758 states and 14648 transitions. Word has length 134 [2019-10-15 00:10:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:06,501 INFO L462 AbstractCegarLoop]: Abstraction has 10758 states and 14648 transitions. [2019-10-15 00:10:06,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 10758 states and 14648 transitions. [2019-10-15 00:10:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 00:10:06,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:06,510 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] [2019-10-15 00:10:06,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:06,725 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:06,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1383176335, now seen corresponding path program 1 times [2019-10-15 00:10:06,726 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:06,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770769911] [2019-10-15 00:10:06,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:06,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:06,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:06,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770769911] [2019-10-15 00:10:06,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267699717] [2019-10-15 00:10:06,894 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 [2019-10-15 00:10:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:06,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:06,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 00:10:07,032 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:07,122 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:07,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-15 00:10:07,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205410607] [2019-10-15 00:10:07,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:07,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:07,125 INFO L87 Difference]: Start difference. First operand 10758 states and 14648 transitions. Second operand 5 states. [2019-10-15 00:10:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:12,094 INFO L93 Difference]: Finished difference Result 21713 states and 30030 transitions. [2019-10-15 00:10:12,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:12,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2019-10-15 00:10:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:12,135 INFO L225 Difference]: With dead ends: 21713 [2019-10-15 00:10:12,135 INFO L226 Difference]: Without dead ends: 10961 [2019-10-15 00:10:12,158 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 [2019-10-15 00:10:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10961 states. [2019-10-15 00:10:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10961 to 10163. [2019-10-15 00:10:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10163 states. [2019-10-15 00:10:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 13035 transitions. [2019-10-15 00:10:12,386 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 13035 transitions. Word has length 168 [2019-10-15 00:10:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:12,387 INFO L462 AbstractCegarLoop]: Abstraction has 10163 states and 13035 transitions. [2019-10-15 00:10:12,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 13035 transitions. [2019-10-15 00:10:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-15 00:10:12,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:12,391 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] [2019-10-15 00:10:12,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:12,595 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1478446898, now seen corresponding path program 1 times [2019-10-15 00:10:12,596 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:12,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209381016] [2019-10-15 00:10:12,597 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:12,597 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:12,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:12,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209381016] [2019-10-15 00:10:12,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408124608] [2019-10-15 00:10:12,764 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 [2019-10-15 00:10:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:12,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:10:12,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:12,922 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:13,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1116886337] [2019-10-15 00:10:13,029 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 220 [2019-10-15 00:10:13,082 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:10:13,082 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)