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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:19,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:19,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:19,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:19,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:19,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:19,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:19,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:19,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:19,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:19,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:19,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:19,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:19,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:19,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:19,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:19,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:19,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:19,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:19,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:19,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:19,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:19,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:19,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:19,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:07:19,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:07:19,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:07:19,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:07:19,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:07:19,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:07:19,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:19,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:19,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:19,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:19,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:19,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:19,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:19,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:19,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:19,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:19,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:19,630 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 20:07:19,654 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:19,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:19,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:19,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:19,657 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:19,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:19,657 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:19,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:19,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:19,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:19,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:19,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:19,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:19,660 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:19,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:19,660 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:19,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:19,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:19,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:19,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:19,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:19,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:19,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:19,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:19,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:19,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:19,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:19,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:19,663 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 20:07:19,959 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:19,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:19,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:19,981 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:19,981 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:19,982 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-10-13 20:07:20,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc97fae3e/88d62dbbe5a34aa89712c8191344e7aa/FLAG7cea34019 [2019-10-13 20:07:20,683 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:20,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-10-13 20:07:20,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc97fae3e/88d62dbbe5a34aa89712c8191344e7aa/FLAG7cea34019 [2019-10-13 20:07:20,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc97fae3e/88d62dbbe5a34aa89712c8191344e7aa [2019-10-13 20:07:20,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:20,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:20,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:20,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:20,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:20,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:20" (1/1) ... [2019-10-13 20:07:20,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb457ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:20, skipping insertion in model container [2019-10-13 20:07:20,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:20" (1/1) ... [2019-10-13 20:07:20,994 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:21,054 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:21,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:21,695 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:22,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:22,057 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:22,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22 WrapperNode [2019-10-13 20:07:22,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:22,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:22,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:22,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:22,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (1/1) ... [2019-10-13 20:07:22,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (1/1) ... [2019-10-13 20:07:22,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (1/1) ... [2019-10-13 20:07:22,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (1/1) ... [2019-10-13 20:07:22,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (1/1) ... [2019-10-13 20:07:22,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (1/1) ... [2019-10-13 20:07:22,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (1/1) ... [2019-10-13 20:07:22,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:22,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:22,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:22,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:22,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (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 20:07:22,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:22,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:22,338 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:22,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:22,338 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:22,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:22,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:23,806 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:23,806 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:23,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:23 BoogieIcfgContainer [2019-10-13 20:07:23,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:23,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:23,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:23,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:23,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:20" (1/3) ... [2019-10-13 20:07:23,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70746607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:23, skipping insertion in model container [2019-10-13 20:07:23,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:22" (2/3) ... [2019-10-13 20:07:23,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70746607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:23, skipping insertion in model container [2019-10-13 20:07:23,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:23" (3/3) ... [2019-10-13 20:07:23,828 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label37.c [2019-10-13 20:07:23,841 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:23,851 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:23,863 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:23,900 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:23,900 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:23,900 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:23,900 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:23,900 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:23,900 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:23,901 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:23,901 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 20:07:23,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:23,933 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] [2019-10-13 20:07:23,935 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash -803708109, now seen corresponding path program 1 times [2019-10-13 20:07:23,949 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:23,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830019559] [2019-10-13 20:07:23,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:23,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:23,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:24,177 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 20:07:24,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830019559] [2019-10-13 20:07:24,179 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:24,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:24,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954975185] [2019-10-13 20:07:24,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:24,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:24,211 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:25,660 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:07:25,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:25,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-13 20:07:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:25,701 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:07:25,702 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:25,716 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 20:07:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:07:25,807 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 24 [2019-10-13 20:07:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:25,808 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:07:25,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:07:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 20:07:25,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:25,820 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:25,820 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1307539406, now seen corresponding path program 1 times [2019-10-13 20:07:25,822 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:25,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149276839] [2019-10-13 20:07:25,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:25,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:25,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:26,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149276839] [2019-10-13 20:07:26,149 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:26,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:07:26,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783009458] [2019-10-13 20:07:26,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:07:26,152 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:26,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:07:26,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:07:26,153 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:07:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:27,474 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-13 20:07:27,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:27,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-13 20:07:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:27,483 INFO L225 Difference]: With dead ends: 936 [2019-10-13 20:07:27,484 INFO L226 Difference]: Without dead ends: 570 [2019-10-13 20:07:27,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:07:27,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-13 20:07:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-13 20:07:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-13 20:07:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-13 20:07:27,529 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 98 [2019-10-13 20:07:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:27,529 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-13 20:07:27,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:07:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-13 20:07:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 20:07:27,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:27,532 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:27,533 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:27,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1750148479, now seen corresponding path program 1 times [2019-10-13 20:07:27,533 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:27,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555060567] [2019-10-13 20:07:27,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:27,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:27,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:27,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555060567] [2019-10-13 20:07:27,683 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:27,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:27,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786162630] [2019-10-13 20:07:27,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:27,685 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:27,686 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-13 20:07:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:29,369 INFO L93 Difference]: Finished difference Result 2218 states and 3287 transitions. [2019-10-13 20:07:29,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:29,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2019-10-13 20:07:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:29,382 INFO L225 Difference]: With dead ends: 2218 [2019-10-13 20:07:29,382 INFO L226 Difference]: Without dead ends: 1662 [2019-10-13 20:07:29,385 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 20:07:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-10-13 20:07:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1662. [2019-10-13 20:07:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1662 states. [2019-10-13 20:07:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2283 transitions. [2019-10-13 20:07:29,486 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2283 transitions. Word has length 107 [2019-10-13 20:07:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:29,487 INFO L462 AbstractCegarLoop]: Abstraction has 1662 states and 2283 transitions. [2019-10-13 20:07:29,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2283 transitions. [2019-10-13 20:07:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-13 20:07:29,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:29,504 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:07:29,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1682277713, now seen corresponding path program 1 times [2019-10-13 20:07:29,506 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:29,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301252527] [2019-10-13 20:07:29,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:29,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:29,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 20:07:29,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301252527] [2019-10-13 20:07:29,839 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:29,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:29,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594131826] [2019-10-13 20:07:29,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:29,842 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:29,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:29,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:29,843 INFO L87 Difference]: Start difference. First operand 1662 states and 2283 transitions. Second operand 4 states. [2019-10-13 20:07:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:31,215 INFO L93 Difference]: Finished difference Result 5334 states and 7445 transitions. [2019-10-13 20:07:31,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:31,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2019-10-13 20:07:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:31,239 INFO L225 Difference]: With dead ends: 5334 [2019-10-13 20:07:31,239 INFO L226 Difference]: Without dead ends: 3678 [2019-10-13 20:07:31,243 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 20:07:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2019-10-13 20:07:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3678. [2019-10-13 20:07:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3678 states. [2019-10-13 20:07:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 4968 transitions. [2019-10-13 20:07:31,350 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 4968 transitions. Word has length 216 [2019-10-13 20:07:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:31,351 INFO L462 AbstractCegarLoop]: Abstraction has 3678 states and 4968 transitions. [2019-10-13 20:07:31,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 4968 transitions. [2019-10-13 20:07:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-13 20:07:31,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:31,360 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:07:31,360 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:31,360 INFO L82 PathProgramCache]: Analyzing trace with hash 710456757, now seen corresponding path program 1 times [2019-10-13 20:07:31,361 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:31,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401403330] [2019-10-13 20:07:31,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:31,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:31,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:32,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401403330] [2019-10-13 20:07:32,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016220532] [2019-10-13 20:07:32,111 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 20:07:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:32,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:32,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:32,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 20:07:32,512 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:32,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:32,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:32,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:32,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:32,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:32,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:33,051 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:33,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2019-10-13 20:07:33,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008112015] [2019-10-13 20:07:33,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:33,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:33,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:33,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:07:33,053 INFO L87 Difference]: Start difference. First operand 3678 states and 4968 transitions. Second operand 5 states. [2019-10-13 20:07:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:34,695 INFO L93 Difference]: Finished difference Result 7942 states and 10714 transitions. [2019-10-13 20:07:34,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:34,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-10-13 20:07:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:34,728 INFO L225 Difference]: With dead ends: 7942 [2019-10-13 20:07:34,728 INFO L226 Difference]: Without dead ends: 4270 [2019-10-13 20:07:34,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 551 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-13 20:07:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2019-10-13 20:07:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3716. [2019-10-13 20:07:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3716 states. [2019-10-13 20:07:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4946 transitions. [2019-10-13 20:07:34,894 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4946 transitions. Word has length 278 [2019-10-13 20:07:34,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:34,895 INFO L462 AbstractCegarLoop]: Abstraction has 3716 states and 4946 transitions. [2019-10-13 20:07:34,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4946 transitions. [2019-10-13 20:07:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2019-10-13 20:07:34,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:34,913 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:07:35,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:35,121 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash -987748772, now seen corresponding path program 1 times [2019-10-13 20:07:35,122 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:35,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142105955] [2019-10-13 20:07:35,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:35,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:35,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 137 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:36,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142105955] [2019-10-13 20:07:36,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006849226] [2019-10-13 20:07:36,049 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 20:07:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:36,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:07:36,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:36,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 260 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 20:07:36,494 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:36,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 59 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:37,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1014430148] [2019-10-13 20:07:37,086 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 363 [2019-10-13 20:07:37,151 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:37,152 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)