java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:15,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:15,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:15,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:15,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:15,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:15,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:15,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:15,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:15,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:15,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:15,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:15,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:15,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:15,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:15,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:15,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:15,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:15,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:15,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:15,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:15,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:15,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:15,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:15,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:15,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:15,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:15,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:15,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:10:15,785 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:15,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:15,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:15,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:15,791 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:15,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:15,791 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:15,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:15,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:15,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:15,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:15,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:15,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:15,792 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:15,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:15,793 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:15,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:15,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:15,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:15,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:15,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:15,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:15,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:15,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:15,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:15,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:15,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:15,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:15,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:10:16,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:16,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:16,118 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:16,120 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:16,120 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:16,123 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label41.c [2019-10-15 00:10:16,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04c5f361/a99299689c544cfda0c14f408f0a45ba/FLAG76be8d2a0 [2019-10-15 00:10:16,996 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:16,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label41.c [2019-10-15 00:10:17,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04c5f361/a99299689c544cfda0c14f408f0a45ba/FLAG76be8d2a0 [2019-10-15 00:10:17,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04c5f361/a99299689c544cfda0c14f408f0a45ba [2019-10-15 00:10:17,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:17,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:17,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:17,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:17,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:17,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef64dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17, skipping insertion in model container [2019-10-15 00:10:17,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,126 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:17,256 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:18,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:18,674 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:19,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:19,134 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:19,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19 WrapperNode [2019-10-15 00:10:19,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:19,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:19,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:19,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:19,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (1/1) ... [2019-10-15 00:10:19,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (1/1) ... [2019-10-15 00:10:19,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (1/1) ... [2019-10-15 00:10:19,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (1/1) ... [2019-10-15 00:10:19,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (1/1) ... [2019-10-15 00:10:19,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (1/1) ... [2019-10-15 00:10:19,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (1/1) ... [2019-10-15 00:10:19,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:19,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:19,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:19,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:19,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:19,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:19,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:19,461 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:19,461 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:19,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:19,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:19,462 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:19,462 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:19,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:19,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:19,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:19,464 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:19,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:19,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:19,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:23,084 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:23,084 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:23,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:23 BoogieIcfgContainer [2019-10-15 00:10:23,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:23,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:23,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:23,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:23,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:17" (1/3) ... [2019-10-15 00:10:23,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1700d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:23, skipping insertion in model container [2019-10-15 00:10:23,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:19" (2/3) ... [2019-10-15 00:10:23,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1700d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:23, skipping insertion in model container [2019-10-15 00:10:23,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:23" (3/3) ... [2019-10-15 00:10:23,107 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label41.c [2019-10-15 00:10:23,118 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:23,129 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:23,141 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:23,185 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:23,185 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:23,185 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:23,185 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:23,185 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:23,186 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:23,186 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:23,186 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-15 00:10:23,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:23,243 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] [2019-10-15 00:10:23,245 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1857316166, now seen corresponding path program 1 times [2019-10-15 00:10:23,262 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:23,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79800464] [2019-10-15 00:10:23,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:23,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:23,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:23,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79800464] [2019-10-15 00:10:23,692 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:23,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:23,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420121750] [2019-10-15 00:10:23,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:23,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:23,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:23,718 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:28,288 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:28,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:28,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-15 00:10:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:28,333 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:28,333 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:28,348 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 [2019-10-15 00:10:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-15 00:10:28,512 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 71 [2019-10-15 00:10:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:28,513 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-15 00:10:28,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-15 00:10:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 00:10:28,526 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:28,527 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:28,527 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1967300729, now seen corresponding path program 1 times [2019-10-15 00:10:28,529 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:28,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232939935] [2019-10-15 00:10:28,529 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:28,530 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:28,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:28,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232939935] [2019-10-15 00:10:28,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:28,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:28,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7368530] [2019-10-15 00:10:28,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:28,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:28,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:28,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:28,776 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-15 00:10:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:34,158 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-15 00:10:34,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:34,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-10-15 00:10:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:34,179 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:34,179 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:34,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-15 00:10:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:10:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4749 transitions. [2019-10-15 00:10:34,302 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4749 transitions. Word has length 144 [2019-10-15 00:10:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:34,303 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4749 transitions. [2019-10-15 00:10:34,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4749 transitions. [2019-10-15 00:10:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 00:10:34,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:34,306 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:34,306 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:34,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1730741066, now seen corresponding path program 1 times [2019-10-15 00:10:34,307 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:34,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269280377] [2019-10-15 00:10:34,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:34,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:34,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:34,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269280377] [2019-10-15 00:10:34,511 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:34,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:34,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573650922] [2019-10-15 00:10:34,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:34,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:34,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:34,513 INFO L87 Difference]: Start difference. First operand 2864 states and 4749 transitions. Second operand 5 states. [2019-10-15 00:10:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:40,111 INFO L93 Difference]: Finished difference Result 8756 states and 14708 transitions. [2019-10-15 00:10:40,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:10:40,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-15 00:10:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:40,151 INFO L225 Difference]: With dead ends: 8756 [2019-10-15 00:10:40,151 INFO L226 Difference]: Without dead ends: 5898 [2019-10-15 00:10:40,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:10:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5898 states. [2019-10-15 00:10:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5898 to 5815. [2019-10-15 00:10:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5815 states. [2019-10-15 00:10:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5815 states to 5815 states and 8479 transitions. [2019-10-15 00:10:40,413 INFO L78 Accepts]: Start accepts. Automaton has 5815 states and 8479 transitions. Word has length 147 [2019-10-15 00:10:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:40,413 INFO L462 AbstractCegarLoop]: Abstraction has 5815 states and 8479 transitions. [2019-10-15 00:10:40,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5815 states and 8479 transitions. [2019-10-15 00:10:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 00:10:40,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:40,421 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:40,421 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -864135450, now seen corresponding path program 1 times [2019-10-15 00:10:40,422 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:40,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723259078] [2019-10-15 00:10:40,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:40,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:40,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:40,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723259078] [2019-10-15 00:10:40,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:40,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:40,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086713527] [2019-10-15 00:10:40,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:40,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:40,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:40,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:40,697 INFO L87 Difference]: Start difference. First operand 5815 states and 8479 transitions. Second operand 4 states. [2019-10-15 00:10:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:46,398 INFO L93 Difference]: Finished difference Result 14506 states and 21040 transitions. [2019-10-15 00:10:46,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:46,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-15 00:10:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:46,445 INFO L225 Difference]: With dead ends: 14506 [2019-10-15 00:10:46,445 INFO L226 Difference]: Without dead ends: 8697 [2019-10-15 00:10:46,460 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 [2019-10-15 00:10:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8697 states. [2019-10-15 00:10:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8697 to 8687. [2019-10-15 00:10:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8687 states. [2019-10-15 00:10:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 11857 transitions. [2019-10-15 00:10:46,777 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 11857 transitions. Word has length 177 [2019-10-15 00:10:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:46,780 INFO L462 AbstractCegarLoop]: Abstraction has 8687 states and 11857 transitions. [2019-10-15 00:10:46,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 11857 transitions. [2019-10-15 00:10:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-15 00:10:46,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:46,786 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:46,786 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:46,787 INFO L82 PathProgramCache]: Analyzing trace with hash 858375375, now seen corresponding path program 1 times [2019-10-15 00:10:46,787 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:46,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679400499] [2019-10-15 00:10:46,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:46,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:46,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:46,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679400499] [2019-10-15 00:10:46,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780765159] [2019-10-15 00:10:46,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:47,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:47,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 00:10:47,280 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:47,457 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:47,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-15 00:10:47,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896041879] [2019-10-15 00:10:47,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:47,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:47,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:10:47,459 INFO L87 Difference]: Start difference. First operand 8687 states and 11857 transitions. Second operand 5 states.