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/Problem10_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:00:58,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:00:58,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:00:58,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:00:58,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:00:58,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:00:58,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:00:58,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:00:58,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:00:58,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:00:58,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:00:58,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:00:58,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:00:58,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:00:58,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:00:58,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:00:58,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:00:58,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:00:58,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:00:58,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:00:58,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:00:58,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:00:58,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:00:58,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:00:58,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:00:58,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:00:58,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:00:58,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:00:58,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:00:58,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:00:58,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:00:58,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:00:58,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:00:58,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:00:58,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:00:58,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:00:58,125 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 00:00:58,160 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:00:58,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:00:58,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:00:58,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:00:58,162 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:00:58,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:00:58,163 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:00:58,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:00:58,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:00:58,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:00:58,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:00:58,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:00:58,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:00:58,166 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:00:58,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:00:58,166 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:00:58,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:00:58,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:00:58,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:00:58,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:00:58,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:00:58,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:58,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:00:58,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:00:58,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:00:58,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:00:58,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:00:58,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:00:58,170 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 00:00:58,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:00:58,439 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:00:58,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:00:58,445 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:00:58,446 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:00:58,447 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label22.c [2019-10-15 00:00:58,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae492eeb5/8612a3f2d0e44da5b23adcac7226759f/FLAG66b6de979 [2019-10-15 00:00:59,103 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:00:59,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label22.c [2019-10-15 00:00:59,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae492eeb5/8612a3f2d0e44da5b23adcac7226759f/FLAG66b6de979 [2019-10-15 00:00:59,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae492eeb5/8612a3f2d0e44da5b23adcac7226759f [2019-10-15 00:00:59,403 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:00:59,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:00:59,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:59,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:00:59,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:00:59,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:59" (1/1) ... [2019-10-15 00:00:59,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a08c9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:59, skipping insertion in model container [2019-10-15 00:00:59,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:59" (1/1) ... [2019-10-15 00:00:59,420 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:00:59,482 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:01:00,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:00,021 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:01:00,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:00,158 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:01:00,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00 WrapperNode [2019-10-15 00:01:00,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:00,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:01:00,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:01:00,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:01:00,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (1/1) ... [2019-10-15 00:01:00,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (1/1) ... [2019-10-15 00:01:00,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (1/1) ... [2019-10-15 00:01:00,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (1/1) ... [2019-10-15 00:01:00,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (1/1) ... [2019-10-15 00:01:00,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (1/1) ... [2019-10-15 00:01:00,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (1/1) ... [2019-10-15 00:01:00,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:01:00,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:01:00,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:01:00,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:01:00,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (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 00:01:00,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:01:00,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:01:00,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:01:00,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:01:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:01:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:01:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:01:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:01:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:01:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:01:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:01:01,589 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:01:01,589 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:01:01,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:01 BoogieIcfgContainer [2019-10-15 00:01:01,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:01:01,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:01:01,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:01:01,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:01:01,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:59" (1/3) ... [2019-10-15 00:01:01,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8927ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:01, skipping insertion in model container [2019-10-15 00:01:01,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:00" (2/3) ... [2019-10-15 00:01:01,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8927ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:01, skipping insertion in model container [2019-10-15 00:01:01,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:01" (3/3) ... [2019-10-15 00:01:01,600 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label22.c [2019-10-15 00:01:01,611 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:01:01,623 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:01:01,637 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:01:01,685 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:01:01,685 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:01:01,685 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:01:01,685 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:01:01,685 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:01:01,686 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:01:01,686 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:01:01,686 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:01:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:01:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 00:01:01,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:01,733 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] [2019-10-15 00:01:01,735 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1257002150, now seen corresponding path program 1 times [2019-10-15 00:01:01,750 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:01,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947121558] [2019-10-15 00:01:01,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:01,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:01,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:02,096 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 00:01:02,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947121558] [2019-10-15 00:01:02,099 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:02,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:01:02,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270222137] [2019-10-15 00:01:02,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:02,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:02,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:02,128 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-15 00:01:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:03,581 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-10-15 00:01:03,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:03,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-15 00:01:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:03,604 INFO L225 Difference]: With dead ends: 733 [2019-10-15 00:01:03,604 INFO L226 Difference]: Without dead ends: 437 [2019-10-15 00:01:03,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 00:01:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-15 00:01:03,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-10-15 00:01:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-15 00:01:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-10-15 00:01:03,729 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 43 [2019-10-15 00:01:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:03,730 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-10-15 00:01:03,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-10-15 00:01:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 00:01:03,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:03,736 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:03,736 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash 961573706, now seen corresponding path program 1 times [2019-10-15 00:01:03,737 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:03,738 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152477613] [2019-10-15 00:01:03,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:03,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:03,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:03,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152477613] [2019-10-15 00:01:03,958 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:03,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:03,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571112906] [2019-10-15 00:01:03,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:03,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:03,962 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-10-15 00:01:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:04,952 INFO L93 Difference]: Finished difference Result 1329 states and 2004 transitions. [2019-10-15 00:01:04,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:04,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-10-15 00:01:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:04,962 INFO L225 Difference]: With dead ends: 1329 [2019-10-15 00:01:04,962 INFO L226 Difference]: Without dead ends: 898 [2019-10-15 00:01:04,964 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 [2019-10-15 00:01:04,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-10-15 00:01:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-10-15 00:01:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-15 00:01:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1284 transitions. [2019-10-15 00:01:05,017 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1284 transitions. Word has length 117 [2019-10-15 00:01:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:05,018 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1284 transitions. [2019-10-15 00:01:05,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1284 transitions. [2019-10-15 00:01:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 00:01:05,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:05,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:05,022 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash -956258770, now seen corresponding path program 1 times [2019-10-15 00:01:05,022 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:05,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286519796] [2019-10-15 00:01:05,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:05,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286519796] [2019-10-15 00:01:05,154 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:05,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:05,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248130979] [2019-10-15 00:01:05,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:05,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:05,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:05,156 INFO L87 Difference]: Start difference. First operand 880 states and 1284 transitions. Second operand 6 states. [2019-10-15 00:01:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:06,160 INFO L93 Difference]: Finished difference Result 2219 states and 3338 transitions. [2019-10-15 00:01:06,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:06,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-15 00:01:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:06,171 INFO L225 Difference]: With dead ends: 2219 [2019-10-15 00:01:06,171 INFO L226 Difference]: Without dead ends: 1345 [2019-10-15 00:01:06,174 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 00:01:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2019-10-15 00:01:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1039. [2019-10-15 00:01:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-15 00:01:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1451 transitions. [2019-10-15 00:01:06,221 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1451 transitions. Word has length 119 [2019-10-15 00:01:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:06,222 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1451 transitions. [2019-10-15 00:01:06,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1451 transitions. [2019-10-15 00:01:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 00:01:06,225 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:06,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:06,225 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:06,226 INFO L82 PathProgramCache]: Analyzing trace with hash -550888759, now seen corresponding path program 1 times [2019-10-15 00:01:06,226 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:06,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63799685] [2019-10-15 00:01:06,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:06,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:06,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:06,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63799685] [2019-10-15 00:01:06,421 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:06,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 00:01:06,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363109224] [2019-10-15 00:01:06,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:01:06,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:01:06,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:01:06,424 INFO L87 Difference]: Start difference. First operand 1039 states and 1451 transitions. Second operand 7 states. [2019-10-15 00:01:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:07,768 INFO L93 Difference]: Finished difference Result 2238 states and 3166 transitions. [2019-10-15 00:01:07,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:01:07,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2019-10-15 00:01:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:07,776 INFO L225 Difference]: With dead ends: 2238 [2019-10-15 00:01:07,776 INFO L226 Difference]: Without dead ends: 1039 [2019-10-15 00:01:07,781 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2019-10-15 00:01:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2019-10-15 00:01:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-15 00:01:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1444 transitions. [2019-10-15 00:01:07,819 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1444 transitions. Word has length 122 [2019-10-15 00:01:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:07,820 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1444 transitions. [2019-10-15 00:01:07,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:01:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1444 transitions. [2019-10-15 00:01:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 00:01:07,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:07,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:07,824 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash 772314102, now seen corresponding path program 1 times [2019-10-15 00:01:07,825 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:07,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793325872] [2019-10-15 00:01:07,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:07,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:07,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:01:07,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793325872] [2019-10-15 00:01:07,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881931721] [2019-10-15 00:01:07,933 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 00:01:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:08,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:08,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:08,180 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:08,243 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:01:08,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 00:01:08,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015611405] [2019-10-15 00:01:08,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:08,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:08,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:08,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:08,246 INFO L87 Difference]: Start difference. First operand 1039 states and 1444 transitions. Second operand 4 states. [2019-10-15 00:01:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:09,141 INFO L93 Difference]: Finished difference Result 1911 states and 2724 transitions. [2019-10-15 00:01:09,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:09,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 00:01:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:09,157 INFO L225 Difference]: With dead ends: 1911 [2019-10-15 00:01:09,158 INFO L226 Difference]: Without dead ends: 1909 [2019-10-15 00:01:09,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2019-10-15 00:01:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1333. [2019-10-15 00:01:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-10-15 00:01:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1879 transitions. [2019-10-15 00:01:09,225 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1879 transitions. Word has length 123 [2019-10-15 00:01:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:09,226 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 1879 transitions. [2019-10-15 00:01:09,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1879 transitions. [2019-10-15 00:01:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 00:01:09,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:09,259 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:09,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:09,466 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:09,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1023272790, now seen corresponding path program 1 times [2019-10-15 00:01:09,467 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:09,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670527572] [2019-10-15 00:01:09,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:09,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:09,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:09,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670527572] [2019-10-15 00:01:09,699 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:09,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:09,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134595703] [2019-10-15 00:01:09,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:09,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:09,703 INFO L87 Difference]: Start difference. First operand 1333 states and 1879 transitions. Second operand 6 states. [2019-10-15 00:01:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:10,538 INFO L93 Difference]: Finished difference Result 3290 states and 4869 transitions. [2019-10-15 00:01:10,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:10,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-10-15 00:01:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:10,552 INFO L225 Difference]: With dead ends: 3290 [2019-10-15 00:01:10,552 INFO L226 Difference]: Without dead ends: 1963 [2019-10-15 00:01:10,557 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 00:01:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2019-10-15 00:01:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1780. [2019-10-15 00:01:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-10-15 00:01:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2400 transitions. [2019-10-15 00:01:10,617 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2400 transitions. Word has length 165 [2019-10-15 00:01:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:10,618 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 2400 transitions. [2019-10-15 00:01:10,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2400 transitions. [2019-10-15 00:01:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-10-15 00:01:10,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:10,627 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:10,628 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:10,628 INFO L82 PathProgramCache]: Analyzing trace with hash -95661739, now seen corresponding path program 1 times [2019-10-15 00:01:10,629 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:10,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594756746] [2019-10-15 00:01:10,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:10,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:10,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 172 proven. 74 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 00:01:11,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594756746] [2019-10-15 00:01:11,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512301644] [2019-10-15 00:01:11,070 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 [2019-10-15 00:01:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:11,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 00:01:11,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:11,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-10-15 00:01:11,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:01:11,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 00:01:11,623 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:11,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:01:11,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:01:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 00:01:12,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [585612485] [2019-10-15 00:01:12,180 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 353 [2019-10-15 00:01:12,236 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:12,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)