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/Problem14_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:06:17,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:06:17,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:06:17,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:06:17,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:06:17,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:06:17,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:06:17,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:06:17,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:06:17,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:06:17,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:06:17,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:06:17,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:06:17,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:06:17,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:06:17,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:06:17,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:06:17,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:06:17,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:06:17,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:06:17,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:06:17,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:06:17,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:06:17,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:06:17,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:06:17,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:06:17,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:06:17,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:06:17,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:06:17,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:06:17,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:06:17,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:06:17,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:06:17,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:06:17,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:06:17,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:06:17,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:06:17,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:06:17,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:06:17,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:06:17,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:06:17,596 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 20:06:17,615 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:06:17,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:06:17,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:06:17,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:06:17,620 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:06:17,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:06:17,620 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:06:17,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:06:17,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:06:17,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:06:17,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:06:17,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:06:17,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:06:17,623 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:06:17,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:06:17,623 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:06:17,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:06:17,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:06:17,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:06:17,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:06:17,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:06:17,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:06:17,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:06:17,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:06:17,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:06:17,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:06:17,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:06:17,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:06:17,626 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 20:06:17,928 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:06:17,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:06:17,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:06:17,945 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:06:17,945 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:06:17,946 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-10-13 20:06:18,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f477fdcff/f172d2ca5d0f4e1c90b43b311a3171b4/FLAGb217c19eb [2019-10-13 20:06:18,577 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:06:18,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-10-13 20:06:18,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f477fdcff/f172d2ca5d0f4e1c90b43b311a3171b4/FLAGb217c19eb [2019-10-13 20:06:18,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f477fdcff/f172d2ca5d0f4e1c90b43b311a3171b4 [2019-10-13 20:06:18,837 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:06:18,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:06:18,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:18,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:06:18,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:06:18,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:18" (1/1) ... [2019-10-13 20:06:18,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac730e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:18, skipping insertion in model container [2019-10-13 20:06:18,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:18" (1/1) ... [2019-10-13 20:06:18,854 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:06:18,918 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:06:19,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:19,446 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:06:19,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:19,629 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:06:19,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19 WrapperNode [2019-10-13 20:06:19,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:19,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:06:19,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:06:19,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:06:19,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (1/1) ... [2019-10-13 20:06:19,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (1/1) ... [2019-10-13 20:06:19,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (1/1) ... [2019-10-13 20:06:19,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (1/1) ... [2019-10-13 20:06:19,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (1/1) ... [2019-10-13 20:06:19,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (1/1) ... [2019-10-13 20:06:19,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (1/1) ... [2019-10-13 20:06:19,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:06:19,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:06:19,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:06:19,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:06:19,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (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 20:06:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:06:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:06:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:06:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:06:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:06:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:06:19,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:06:19,861 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:06:19,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:06:19,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:06:19,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:06:21,489 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:06:21,490 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:06:21,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:21 BoogieIcfgContainer [2019-10-13 20:06:21,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:06:21,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:06:21,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:06:21,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:06:21,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:06:18" (1/3) ... [2019-10-13 20:06:21,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e48137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:21, skipping insertion in model container [2019-10-13 20:06:21,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:19" (2/3) ... [2019-10-13 20:06:21,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e48137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:21, skipping insertion in model container [2019-10-13 20:06:21,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:21" (3/3) ... [2019-10-13 20:06:21,499 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label00.c [2019-10-13 20:06:21,509 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:06:21,519 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:06:21,530 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:06:21,560 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:06:21,560 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:06:21,561 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:06:21,561 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:06:21,561 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:06:21,561 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:06:21,561 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:06:21,562 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:06:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:06:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 20:06:21,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:21,596 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:21,598 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash -837227006, now seen corresponding path program 1 times [2019-10-13 20:06:21,613 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:21,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948058733] [2019-10-13 20:06:21,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:21,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:21,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:21,995 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 20:06:21,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948058733] [2019-10-13 20:06:21,997 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:21,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:06:21,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846543001] [2019-10-13 20:06:22,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:06:22,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:22,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:06:22,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:22,020 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:06:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:23,123 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:06:23,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:06:23,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-13 20:06:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:23,145 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:06:23,145 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:06:23,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:06:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:06:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:06:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:06:23,240 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 59 [2019-10-13 20:06:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:23,241 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:06:23,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:06:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:06:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 20:06:23,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:23,248 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 20:06:23,248 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:23,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1547926855, now seen corresponding path program 1 times [2019-10-13 20:06:23,249 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:23,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763226357] [2019-10-13 20:06:23,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:23,250 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:23,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:23,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763226357] [2019-10-13 20:06:23,507 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:23,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:23,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742664995] [2019-10-13 20:06:23,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:23,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:23,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:23,510 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:06:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:24,738 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-10-13 20:06:24,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:24,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2019-10-13 20:06:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:24,745 INFO L225 Difference]: With dead ends: 1122 [2019-10-13 20:06:24,745 INFO L226 Difference]: Without dead ends: 756 [2019-10-13 20:06:24,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:06:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-13 20:06:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-13 20:06:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-13 20:06:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-13 20:06:24,805 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 128 [2019-10-13 20:06:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:24,806 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-13 20:06:24,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-13 20:06:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 20:06:24,809 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:24,809 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 20:06:24,810 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:24,810 INFO L82 PathProgramCache]: Analyzing trace with hash -186094754, now seen corresponding path program 1 times [2019-10-13 20:06:24,810 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:24,811 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529193512] [2019-10-13 20:06:24,811 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:24,811 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:24,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:24,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529193512] [2019-10-13 20:06:24,962 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:24,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:24,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840896185] [2019-10-13 20:06:24,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:24,964 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:24,965 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-13 20:06:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:26,188 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-10-13 20:06:26,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:26,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2019-10-13 20:06:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:26,197 INFO L225 Difference]: With dead ends: 1904 [2019-10-13 20:06:26,198 INFO L226 Difference]: Without dead ends: 1158 [2019-10-13 20:06:26,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:06:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-13 20:06:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-13 20:06:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-13 20:06:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-13 20:06:26,250 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 129 [2019-10-13 20:06:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:26,251 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-13 20:06:26,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-13 20:06:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 20:06:26,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:26,254 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 20:06:26,255 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:26,255 INFO L82 PathProgramCache]: Analyzing trace with hash -547188926, now seen corresponding path program 1 times [2019-10-13 20:06:26,255 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:26,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2394348] [2019-10-13 20:06:26,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:26,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:26,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:26,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2394348] [2019-10-13 20:06:26,423 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:26,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:26,423 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924719457] [2019-10-13 20:06:26,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:26,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:26,426 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-13 20:06:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:27,712 INFO L93 Difference]: Finished difference Result 2882 states and 4163 transitions. [2019-10-13 20:06:27,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:27,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-10-13 20:06:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:27,725 INFO L225 Difference]: With dead ends: 2882 [2019-10-13 20:06:27,726 INFO L226 Difference]: Without dead ends: 1750 [2019-10-13 20:06:27,729 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:06:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2019-10-13 20:06:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1514. [2019-10-13 20:06:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-10-13 20:06:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2084 transitions. [2019-10-13 20:06:27,803 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2084 transitions. Word has length 131 [2019-10-13 20:06:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:27,804 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 2084 transitions. [2019-10-13 20:06:27,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2084 transitions. [2019-10-13 20:06:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 20:06:27,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:27,809 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 20:06:27,809 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash -252421119, now seen corresponding path program 1 times [2019-10-13 20:06:27,809 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:27,810 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183822964] [2019-10-13 20:06:27,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:27,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:27,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:27,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183822964] [2019-10-13 20:06:27,965 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:27,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:27,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456031831] [2019-10-13 20:06:27,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:27,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:27,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:27,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:27,969 INFO L87 Difference]: Start difference. First operand 1514 states and 2084 transitions. Second operand 4 states. [2019-10-13 20:06:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:29,265 INFO L93 Difference]: Finished difference Result 4684 states and 6499 transitions. [2019-10-13 20:06:29,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:29,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-13 20:06:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:29,280 INFO L225 Difference]: With dead ends: 4684 [2019-10-13 20:06:29,280 INFO L226 Difference]: Without dead ends: 3176 [2019-10-13 20:06:29,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2019-10-13 20:06:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2262. [2019-10-13 20:06:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2262 states. [2019-10-13 20:06:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3060 transitions. [2019-10-13 20:06:29,349 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3060 transitions. Word has length 132 [2019-10-13 20:06:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:29,350 INFO L462 AbstractCegarLoop]: Abstraction has 2262 states and 3060 transitions. [2019-10-13 20:06:29,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3060 transitions. [2019-10-13 20:06:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-10-13 20:06:29,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:29,358 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:29,359 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:29,359 INFO L82 PathProgramCache]: Analyzing trace with hash 382896273, now seen corresponding path program 1 times [2019-10-13 20:06:29,359 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:29,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928275890] [2019-10-13 20:06:29,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:29,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:29,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 165 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:29,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928275890] [2019-10-13 20:06:29,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484595655] [2019-10-13 20:06:29,700 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 20:06:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:29,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:06:29,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:29,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 20:06:30,095 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:30,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:30,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:30,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:30,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:30,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:30,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 104 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:30,663 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:06:30,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-10-13 20:06:30,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018802365] [2019-10-13 20:06:30,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:30,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:30,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:30,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:06:30,665 INFO L87 Difference]: Start difference. First operand 2262 states and 3060 transitions. Second operand 5 states. [2019-10-13 20:06:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:31,966 INFO L93 Difference]: Finished difference Result 4364 states and 5979 transitions. [2019-10-13 20:06:31,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:31,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2019-10-13 20:06:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:31,984 INFO L225 Difference]: With dead ends: 4364 [2019-10-13 20:06:31,985 INFO L226 Difference]: Without dead ends: 2292 [2019-10-13 20:06:31,990 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 644 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-10-13 20:06:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2019-10-13 20:06:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2272. [2019-10-13 20:06:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2272 states. [2019-10-13 20:06:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 3041 transitions. [2019-10-13 20:06:32,051 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 3041 transitions. Word has length 324 [2019-10-13 20:06:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:32,052 INFO L462 AbstractCegarLoop]: Abstraction has 2272 states and 3041 transitions. [2019-10-13 20:06:32,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:32,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 3041 transitions. [2019-10-13 20:06:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-13 20:06:32,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:32,063 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:32,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:32,295 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:32,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1608334599, now seen corresponding path program 1 times [2019-10-13 20:06:32,296 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:32,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43378432] [2019-10-13 20:06:32,297 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:32,297 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:32,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 242 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:33,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43378432] [2019-10-13 20:06:33,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016596424] [2019-10-13 20:06:33,163 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 20:06:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:33,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:06:33,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:33,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:06:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 330 proven. 53 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 20:06:33,627 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:33,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:06:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 164 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:34,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [728844661] [2019-10-13 20:06:34,184 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 409 [2019-10-13 20:06:34,235 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:06:34,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:06:58,130 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:06:58,133 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 4 different actions 5 times. Never widened. Performed 607 root evaluator evaluations with a maximum evaluation depth of 14. Performed 607 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:06:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:58,137 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates