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/Problem02_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:57:59,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:57:59,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:00,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:00,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:00,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:00,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:00,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:00,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:00,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:00,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:00,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:00,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:00,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:00,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:00,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:00,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:00,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:00,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:00,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:00,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:00,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:00,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:00,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:00,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:58:00,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:58:00,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:58:00,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:58:00,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:58:00,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:58:00,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:00,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:00,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:00,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:00,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:00,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:00,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:00,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:00,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:00,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:00,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:00,060 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 [2019-10-14 23:58:00,074 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:00,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:00,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:00,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:00,076 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:00,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:00,076 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:00,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:00,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:00,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:00,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:00,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:00,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:00,080 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:00,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:00,081 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:00,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:00,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:00,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:00,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:00,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:00,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:00,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:00,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:00,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:00,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:00,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:00,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:00,083 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 [2019-10-14 23:58:00,348 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:00,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:00,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:00,370 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:00,370 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:00,371 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2019-10-14 23:58:00,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a6183afa/0cdd7ffd3ef44e3a8f9aff3c2a75fca4/FLAG2248d2bdd [2019-10-14 23:58:01,017 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:01,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2019-10-14 23:58:01,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a6183afa/0cdd7ffd3ef44e3a8f9aff3c2a75fca4/FLAG2248d2bdd [2019-10-14 23:58:01,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a6183afa/0cdd7ffd3ef44e3a8f9aff3c2a75fca4 [2019-10-14 23:58:01,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:01,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:01,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:01,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:01,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:01,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:01" (1/1) ... [2019-10-14 23:58:01,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5627da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:01, skipping insertion in model container [2019-10-14 23:58:01,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:01" (1/1) ... [2019-10-14 23:58:01,307 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:01,365 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:01,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:01,918 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:02,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:02,050 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:02,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02 WrapperNode [2019-10-14 23:58:02,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:02,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:02,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:02,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:02,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (1/1) ... [2019-10-14 23:58:02,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (1/1) ... [2019-10-14 23:58:02,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (1/1) ... [2019-10-14 23:58:02,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (1/1) ... [2019-10-14 23:58:02,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (1/1) ... [2019-10-14 23:58:02,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (1/1) ... [2019-10-14 23:58:02,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (1/1) ... [2019-10-14 23:58:02,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:02,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:02,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:02,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:02,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (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 [2019-10-14 23:58:02,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:02,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:02,205 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:02,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:02,205 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:02,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:02,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:02,206 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:02,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:02,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:02,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:03,457 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:03,457 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:03,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:03 BoogieIcfgContainer [2019-10-14 23:58:03,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:03,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:03,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:03,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:03,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:01" (1/3) ... [2019-10-14 23:58:03,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65455632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:03, skipping insertion in model container [2019-10-14 23:58:03,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:02" (2/3) ... [2019-10-14 23:58:03,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65455632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:03, skipping insertion in model container [2019-10-14 23:58:03,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:03" (3/3) ... [2019-10-14 23:58:03,473 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label55.c [2019-10-14 23:58:03,484 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:03,494 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:03,506 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:03,543 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:03,543 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:03,544 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:03,544 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:03,544 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:03,544 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:03,544 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:03,545 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:58:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 23:58:03,603 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:03,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:03,606 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1666327721, now seen corresponding path program 1 times [2019-10-14 23:58:03,624 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:03,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098943589] [2019-10-14 23:58:03,625 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:03,625 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:03,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:04,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098943589] [2019-10-14 23:58:04,125 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:04,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:04,128 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324358908] [2019-10-14 23:58:04,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:04,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:04,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:04,152 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:58:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:05,161 INFO L93 Difference]: Finished difference Result 624 states and 1069 transitions. [2019-10-14 23:58:05,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:05,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-10-14 23:58:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:05,185 INFO L225 Difference]: With dead ends: 624 [2019-10-14 23:58:05,185 INFO L226 Difference]: Without dead ends: 326 [2019-10-14 23:58:05,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-14 23:58:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2019-10-14 23:58:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:58:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 467 transitions. [2019-10-14 23:58:05,316 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 467 transitions. Word has length 111 [2019-10-14 23:58:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:05,318 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 467 transitions. [2019-10-14 23:58:05,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 467 transitions. [2019-10-14 23:58:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:58:05,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:05,333 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:05,333 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:05,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2094723630, now seen corresponding path program 1 times [2019-10-14 23:58:05,335 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:05,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010006053] [2019-10-14 23:58:05,336 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:05,336 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:05,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:05,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010006053] [2019-10-14 23:58:05,532 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:05,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:58:05,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645499715] [2019-10-14 23:58:05,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:58:05,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:58:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:58:05,536 INFO L87 Difference]: Start difference. First operand 321 states and 467 transitions. Second operand 4 states. [2019-10-14 23:58:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:06,653 INFO L93 Difference]: Finished difference Result 1219 states and 1824 transitions. [2019-10-14 23:58:06,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:58:06,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-14 23:58:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:06,667 INFO L225 Difference]: With dead ends: 1219 [2019-10-14 23:58:06,667 INFO L226 Difference]: Without dead ends: 904 [2019-10-14 23:58:06,669 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 [2019-10-14 23:58:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-10-14 23:58:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 755. [2019-10-14 23:58:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2019-10-14 23:58:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1063 transitions. [2019-10-14 23:58:06,710 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1063 transitions. Word has length 119 [2019-10-14 23:58:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:06,711 INFO L462 AbstractCegarLoop]: Abstraction has 755 states and 1063 transitions. [2019-10-14 23:58:06,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:58:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1063 transitions. [2019-10-14 23:58:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 23:58:06,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:06,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:06,730 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash -30959147, now seen corresponding path program 1 times [2019-10-14 23:58:06,731 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:06,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111540697] [2019-10-14 23:58:06,734 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:06,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:06,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:07,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111540697] [2019-10-14 23:58:07,038 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:07,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:58:07,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295913912] [2019-10-14 23:58:07,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:58:07,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:58:07,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:58:07,041 INFO L87 Difference]: Start difference. First operand 755 states and 1063 transitions. Second operand 5 states. [2019-10-14 23:58:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:07,837 INFO L93 Difference]: Finished difference Result 1588 states and 2287 transitions. [2019-10-14 23:58:07,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:58:07,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2019-10-14 23:58:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:07,844 INFO L225 Difference]: With dead ends: 1588 [2019-10-14 23:58:07,844 INFO L226 Difference]: Without dead ends: 755 [2019-10-14 23:58:07,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:58:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2019-10-14 23:58:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 755. [2019-10-14 23:58:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2019-10-14 23:58:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1049 transitions. [2019-10-14 23:58:07,874 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1049 transitions. Word has length 135 [2019-10-14 23:58:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:07,875 INFO L462 AbstractCegarLoop]: Abstraction has 755 states and 1049 transitions. [2019-10-14 23:58:07,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:58:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1049 transitions. [2019-10-14 23:58:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-14 23:58:07,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:07,878 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:07,879 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:07,879 INFO L82 PathProgramCache]: Analyzing trace with hash -906165834, now seen corresponding path program 1 times [2019-10-14 23:58:07,879 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:07,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39393597] [2019-10-14 23:58:07,880 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:07,880 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:07,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:07,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39393597] [2019-10-14 23:58:07,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15382856] [2019-10-14 23:58:07,984 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 [2019-10-14 23:58:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:08,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:58:08,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:58:08,284 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:08,551 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:58:08,551 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-14 23:58:08,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72672426] [2019-10-14 23:58:08,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:58:08,553 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:08,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:58:08,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:58:08,555 INFO L87 Difference]: Start difference. First operand 755 states and 1049 transitions. Second operand 5 states. [2019-10-14 23:58:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:09,117 INFO L93 Difference]: Finished difference Result 1514 states and 2166 transitions. [2019-10-14 23:58:09,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:58:09,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-10-14 23:58:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:09,123 INFO L225 Difference]: With dead ends: 1514 [2019-10-14 23:58:09,124 INFO L226 Difference]: Without dead ends: 765 [2019-10-14 23:58:09,126 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 308 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:58:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2019-10-14 23:58:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 745. [2019-10-14 23:58:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-14 23:58:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 973 transitions. [2019-10-14 23:58:09,153 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 973 transitions. Word has length 157 [2019-10-14 23:58:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:09,153 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 973 transitions. [2019-10-14 23:58:09,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:58:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 973 transitions. [2019-10-14 23:58:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:58:09,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:09,158 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:09,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:09,363 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1631553380, now seen corresponding path program 1 times [2019-10-14 23:58:09,364 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:09,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435241760] [2019-10-14 23:58:09,364 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:09,364 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:09,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:09,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435241760] [2019-10-14 23:58:09,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401281731] [2019-10-14 23:58:09,523 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 [2019-10-14 23:58:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:09,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:09,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:09,715 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:09,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1494044889] [2019-10-14 23:58:09,823 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 161 [2019-10-14 23:58:09,890 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:58:09,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)