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/Problem16_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:09:18,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:09:18,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:09:18,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:09:18,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:09:18,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:09:18,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:09:18,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:09:18,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:09:18,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:09:18,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:09:18,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:09:18,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:09:18,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:09:18,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:09:18,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:09:18,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:09:18,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:09:18,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:09:18,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:09:18,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:09:18,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:09:18,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:09:18,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:09:18,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:09:18,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:09:18,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:09:18,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:09:18,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:09:18,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:09:18,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:09:18,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:09:18,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:09:18,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:09:18,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:09:18,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:09:18,169 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 20:09:18,187 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:09:18,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:09:18,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:09:18,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:09:18,192 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:09:18,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:09:18,192 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:09:18,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:09:18,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:09:18,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:09:18,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:09:18,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:09:18,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:09:18,195 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:09:18,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:09:18,196 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:09:18,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:09:18,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:09:18,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:09:18,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:09:18,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:09:18,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:09:18,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:09:18,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:09:18,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:09:18,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:09:18,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:09:18,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:09:18,201 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 20:09:18,477 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:09:18,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:09:18,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:09:18,502 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:09:18,502 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:09:18,503 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-13 20:09:18,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643a4e356/4c0380ced93746b9aed66da16840b093/FLAG86858673c [2019-10-13 20:09:19,247 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:09:19,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-13 20:09:19,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643a4e356/4c0380ced93746b9aed66da16840b093/FLAG86858673c [2019-10-13 20:09:19,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643a4e356/4c0380ced93746b9aed66da16840b093 [2019-10-13 20:09:19,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:09:19,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:09:19,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:19,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:09:19,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:09:19,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:19" (1/1) ... [2019-10-13 20:09:19,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de83e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:19, skipping insertion in model container [2019-10-13 20:09:19,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:19" (1/1) ... [2019-10-13 20:09:19,416 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:09:19,503 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:09:20,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:20,327 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:09:20,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:20,599 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:09:20,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20 WrapperNode [2019-10-13 20:09:20,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:20,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:09:20,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:09:20,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:09:20,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (1/1) ... [2019-10-13 20:09:20,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (1/1) ... [2019-10-13 20:09:20,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (1/1) ... [2019-10-13 20:09:20,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (1/1) ... [2019-10-13 20:09:20,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (1/1) ... [2019-10-13 20:09:20,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (1/1) ... [2019-10-13 20:09:20,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (1/1) ... [2019-10-13 20:09:20,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:09:20,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:09:20,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:09:20,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:09:20,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (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 20:09:20,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:09:20,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:09:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:09:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:09:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:09:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:09:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:09:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:09:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:09:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:09:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:09:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:09:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:09:23,560 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:09:23,560 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:09:23,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:23 BoogieIcfgContainer [2019-10-13 20:09:23,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:09:23,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:09:23,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:09:23,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:09:23,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:19" (1/3) ... [2019-10-13 20:09:23,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1f5f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:23, skipping insertion in model container [2019-10-13 20:09:23,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:20" (2/3) ... [2019-10-13 20:09:23,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1f5f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:23, skipping insertion in model container [2019-10-13 20:09:23,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:23" (3/3) ... [2019-10-13 20:09:23,573 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2019-10-13 20:09:23,584 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:09:23,593 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:09:23,606 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:09:23,637 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:09:23,637 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:09:23,637 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:09:23,637 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:09:23,637 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:09:23,638 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:09:23,638 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:09:23,638 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:09:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:09:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 20:09:23,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:23,679 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] [2019-10-13 20:09:23,681 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:23,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1802126811, now seen corresponding path program 1 times [2019-10-13 20:09:23,698 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:23,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828176173] [2019-10-13 20:09:23,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:23,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:23,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:24,038 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 20:09:24,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828176173] [2019-10-13 20:09:24,039 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:24,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:09:24,040 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003872205] [2019-10-13 20:09:24,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:09:24,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:09:24,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:24,064 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:09:26,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:26,620 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:09:26,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:09:26,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-13 20:09:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:26,646 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:09:26,646 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:09:26,657 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 20:09:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:09:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:09:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:09:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-13 20:09:26,772 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 64 [2019-10-13 20:09:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:26,773 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-13 20:09:26,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:09:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-13 20:09:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:09:26,782 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:26,782 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, 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 20:09:26,782 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2014427524, now seen corresponding path program 1 times [2019-10-13 20:09:26,783 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:26,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174228300] [2019-10-13 20:09:26,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:26,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:26,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:27,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174228300] [2019-10-13 20:09:27,057 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:27,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:27,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550813377] [2019-10-13 20:09:27,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:27,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:27,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:27,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:27,061 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 6 states. [2019-10-13 20:09:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:29,866 INFO L93 Difference]: Finished difference Result 2063 states and 3618 transitions. [2019-10-13 20:09:29,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:29,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-13 20:09:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:29,880 INFO L225 Difference]: With dead ends: 2063 [2019-10-13 20:09:29,881 INFO L226 Difference]: Without dead ends: 1387 [2019-10-13 20:09:29,884 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 20:09:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2019-10-13 20:09:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1372. [2019-10-13 20:09:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-10-13 20:09:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2274 transitions. [2019-10-13 20:09:29,944 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2274 transitions. Word has length 134 [2019-10-13 20:09:29,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:29,944 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2274 transitions. [2019-10-13 20:09:29,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2274 transitions. [2019-10-13 20:09:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 20:09:29,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:29,948 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, 1, 1, 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 20:09:29,948 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:29,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2143421116, now seen corresponding path program 1 times [2019-10-13 20:09:29,949 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:29,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928764827] [2019-10-13 20:09:29,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:29,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:29,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:30,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928764827] [2019-10-13 20:09:30,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:30,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:30,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459506008] [2019-10-13 20:09:30,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:30,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:30,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:30,120 INFO L87 Difference]: Start difference. First operand 1372 states and 2274 transitions. Second operand 6 states. [2019-10-13 20:09:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:33,034 INFO L93 Difference]: Finished difference Result 3466 states and 5799 transitions. [2019-10-13 20:09:33,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:33,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-10-13 20:09:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:33,047 INFO L225 Difference]: With dead ends: 3466 [2019-10-13 20:09:33,047 INFO L226 Difference]: Without dead ends: 2100 [2019-10-13 20:09:33,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:09:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-13 20:09:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2073. [2019-10-13 20:09:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2019-10-13 20:09:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3322 transitions. [2019-10-13 20:09:33,128 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3322 transitions. Word has length 138 [2019-10-13 20:09:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:33,129 INFO L462 AbstractCegarLoop]: Abstraction has 2073 states and 3322 transitions. [2019-10-13 20:09:33,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3322 transitions. [2019-10-13 20:09:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 20:09:33,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:33,132 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:33,133 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1919929679, now seen corresponding path program 1 times [2019-10-13 20:09:33,133 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:33,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566056550] [2019-10-13 20:09:33,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:33,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:33,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:33,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566056550] [2019-10-13 20:09:33,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:33,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:33,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120402770] [2019-10-13 20:09:33,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:33,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:33,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:33,360 INFO L87 Difference]: Start difference. First operand 2073 states and 3322 transitions. Second operand 6 states. [2019-10-13 20:09:36,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:36,021 INFO L93 Difference]: Finished difference Result 5216 states and 8462 transitions. [2019-10-13 20:09:36,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:36,027 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2019-10-13 20:09:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:36,045 INFO L225 Difference]: With dead ends: 5216 [2019-10-13 20:09:36,045 INFO L226 Difference]: Without dead ends: 3149 [2019-10-13 20:09:36,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:09:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-10-13 20:09:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3128. [2019-10-13 20:09:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3128 states. [2019-10-13 20:09:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4658 transitions. [2019-10-13 20:09:36,138 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4658 transitions. Word has length 169 [2019-10-13 20:09:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:36,138 INFO L462 AbstractCegarLoop]: Abstraction has 3128 states and 4658 transitions. [2019-10-13 20:09:36,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4658 transitions. [2019-10-13 20:09:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-13 20:09:36,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:36,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:36,144 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1854023577, now seen corresponding path program 1 times [2019-10-13 20:09:36,144 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:36,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799950730] [2019-10-13 20:09:36,145 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:36,145 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:36,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:36,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799950730] [2019-10-13 20:09:36,394 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:36,394 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:36,394 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268154008] [2019-10-13 20:09:36,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:36,395 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:36,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:36,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:36,396 INFO L87 Difference]: Start difference. First operand 3128 states and 4658 transitions. Second operand 6 states. [2019-10-13 20:09:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:41,111 INFO L93 Difference]: Finished difference Result 10089 states and 15852 transitions. [2019-10-13 20:09:41,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:41,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 213 [2019-10-13 20:09:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:41,151 INFO L225 Difference]: With dead ends: 10089 [2019-10-13 20:09:41,151 INFO L226 Difference]: Without dead ends: 6967 [2019-10-13 20:09:41,160 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:09:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2019-10-13 20:09:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 6961. [2019-10-13 20:09:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6961 states. [2019-10-13 20:09:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10570 transitions. [2019-10-13 20:09:41,353 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10570 transitions. Word has length 213 [2019-10-13 20:09:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:41,354 INFO L462 AbstractCegarLoop]: Abstraction has 6961 states and 10570 transitions. [2019-10-13 20:09:41,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:41,354 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10570 transitions. [2019-10-13 20:09:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-10-13 20:09:41,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:41,375 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:41,376 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:41,376 INFO L82 PathProgramCache]: Analyzing trace with hash -37255589, now seen corresponding path program 1 times [2019-10-13 20:09:41,377 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:41,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520760179] [2019-10-13 20:09:41,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:41,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:41,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 114 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:41,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520760179] [2019-10-13 20:09:41,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292523013] [2019-10-13 20:09:41,727 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 20:09:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:41,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:09:41,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-13 20:09:42,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 114 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:42,500 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:09:42,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-13 20:09:42,501 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082782040] [2019-10-13 20:09:42,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:09:42,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:09:42,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:09:42,507 INFO L87 Difference]: Start difference. First operand 6961 states and 10570 transitions. Second operand 5 states. [2019-10-13 20:09:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:45,121 INFO L93 Difference]: Finished difference Result 16062 states and 25088 transitions. [2019-10-13 20:09:45,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:09:45,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2019-10-13 20:09:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:45,196 INFO L225 Difference]: With dead ends: 16062 [2019-10-13 20:09:45,196 INFO L226 Difference]: Without dead ends: 9107 [2019-10-13 20:09:45,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 666 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:09:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9107 states. [2019-10-13 20:09:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9107 to 9028. [2019-10-13 20:09:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9028 states. [2019-10-13 20:09:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9028 states to 9028 states and 12595 transitions. [2019-10-13 20:09:45,516 INFO L78 Accepts]: Start accepts. Automaton has 9028 states and 12595 transitions. Word has length 336 [2019-10-13 20:09:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:45,517 INFO L462 AbstractCegarLoop]: Abstraction has 9028 states and 12595 transitions. [2019-10-13 20:09:45,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:09:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9028 states and 12595 transitions. [2019-10-13 20:09:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-10-13 20:09:45,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:45,537 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:09:45,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:45,750 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1591738743, now seen corresponding path program 1 times [2019-10-13 20:09:45,752 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:45,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491620942] [2019-10-13 20:09:45,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:45,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:45,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 114 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:46,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491620942] [2019-10-13 20:09:46,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365373375] [2019-10-13 20:09:46,208 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 20:09:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:46,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:09:46,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-13 20:09:46,622 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 114 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:46,900 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:09:46,901 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-13 20:09:46,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089876467] [2019-10-13 20:09:46,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:09:46,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:46,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:09:46,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:09:46,903 INFO L87 Difference]: Start difference. First operand 9028 states and 12595 transitions. Second operand 5 states. [2019-10-13 20:09:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:49,913 INFO L93 Difference]: Finished difference Result 20890 states and 29869 transitions. [2019-10-13 20:09:49,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:09:49,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 396 [2019-10-13 20:09:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:49,958 INFO L225 Difference]: With dead ends: 20890 [2019-10-13 20:09:49,959 INFO L226 Difference]: Without dead ends: 11868 [2019-10-13 20:09:49,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 787 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:09:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11868 states. [2019-10-13 20:09:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11868 to 11156. [2019-10-13 20:09:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11156 states. [2019-10-13 20:09:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 15524 transitions. [2019-10-13 20:09:50,249 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 15524 transitions. Word has length 396 [2019-10-13 20:09:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:50,250 INFO L462 AbstractCegarLoop]: Abstraction has 11156 states and 15524 transitions. [2019-10-13 20:09:50,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:09:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 15524 transitions. [2019-10-13 20:09:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2019-10-13 20:09:50,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:50,272 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:50,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:50,476 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash -591869981, now seen corresponding path program 1 times [2019-10-13 20:09:50,477 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:50,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365458054] [2019-10-13 20:09:50,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:50,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:50,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 264 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 20:09:51,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365458054] [2019-10-13 20:09:51,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026645789] [2019-10-13 20:09:51,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:51,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:09:51,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-13 20:09:51,973 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 264 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 20:09:52,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [572065538] [2019-10-13 20:09:52,297 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 428 [2019-10-13 20:09:52,353 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:09:52,354 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)