java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:03,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:03,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:03,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:03,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:03,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:03,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:03,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:03,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:03,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:03,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:03,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:03,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:03,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:03,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:03,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:03,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:03,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:03,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:03,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:03,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:03,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:03,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:03,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:03,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:03,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:03,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:03,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:03,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:03,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:03,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:03,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:03,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:03,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:03,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:03,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:03,229 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 20:11:03,244 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:03,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:03,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:03,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:03,249 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:03,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:03,249 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:03,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:03,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:03,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:03,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:03,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:03,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:03,251 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:03,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:03,251 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:03,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:03,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:03,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:03,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:03,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:03,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:03,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:03,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:03,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:03,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:03,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:03,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:03,255 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 20:11:03,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:03,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:03,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:03,556 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:03,557 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:03,558 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-10-13 20:11:03,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0a56901/db2d2892797b4894a049f2532268ee9f/FLAG2a8069515 [2019-10-13 20:11:04,412 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:04,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-10-13 20:11:04,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0a56901/db2d2892797b4894a049f2532268ee9f/FLAG2a8069515 [2019-10-13 20:11:04,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0a56901/db2d2892797b4894a049f2532268ee9f [2019-10-13 20:11:04,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:04,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:04,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:04,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:04,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:04,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:04" (1/1) ... [2019-10-13 20:11:04,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac730e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:04, skipping insertion in model container [2019-10-13 20:11:04,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:04" (1/1) ... [2019-10-13 20:11:04,495 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:04,625 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:06,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:06,051 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:06,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:06,540 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:06,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06 WrapperNode [2019-10-13 20:11:06,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:06,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:06,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:06,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:06,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (1/1) ... [2019-10-13 20:11:06,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (1/1) ... [2019-10-13 20:11:06,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (1/1) ... [2019-10-13 20:11:06,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (1/1) ... [2019-10-13 20:11:06,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (1/1) ... [2019-10-13 20:11:06,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (1/1) ... [2019-10-13 20:11:06,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (1/1) ... [2019-10-13 20:11:06,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:06,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:06,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:06,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:06,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (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 20:11:06,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:06,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:06,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:06,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:06,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:06,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:11,018 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:11,019 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:11,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:11 BoogieIcfgContainer [2019-10-13 20:11:11,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:11,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:11,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:11,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:11,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:04" (1/3) ... [2019-10-13 20:11:11,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139e53e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:11, skipping insertion in model container [2019-10-13 20:11:11,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:06" (2/3) ... [2019-10-13 20:11:11,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139e53e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:11, skipping insertion in model container [2019-10-13 20:11:11,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:11" (3/3) ... [2019-10-13 20:11:11,038 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label23.c [2019-10-13 20:11:11,056 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:11,068 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:11,082 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:11,125 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:11,125 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:11,126 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:11,126 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:11,126 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:11,126 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:11,126 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:11,126 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 20:11:11,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:11,184 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] [2019-10-13 20:11:11,186 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1957259726, now seen corresponding path program 1 times [2019-10-13 20:11:11,204 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:11,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741436253] [2019-10-13 20:11:11,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:11,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:11,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:11,615 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 20:11:11,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741436253] [2019-10-13 20:11:11,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:11,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:11,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088868361] [2019-10-13 20:11:11,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:11,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:11,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:11,643 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:15,954 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:15,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:15,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-10-13 20:11:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:15,998 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:15,998 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:16,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-10-13 20:11:16,178 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 61 [2019-10-13 20:11:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:16,179 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-10-13 20:11:16,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-10-13 20:11:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 20:11:16,196 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:16,197 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, 1, 1, 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 20:11:16,197 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2051582907, now seen corresponding path program 1 times [2019-10-13 20:11:16,199 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:16,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329520736] [2019-10-13 20:11:16,199 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:16,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:16,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:16,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329520736] [2019-10-13 20:11:16,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:16,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:11:16,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763376151] [2019-10-13 20:11:16,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:16,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:11:16,443 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-10-13 20:11:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:21,621 INFO L93 Difference]: Finished difference Result 3572 states and 6416 transitions. [2019-10-13 20:11:21,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:21,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-13 20:11:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:21,637 INFO L225 Difference]: With dead ends: 3572 [2019-10-13 20:11:21,637 INFO L226 Difference]: Without dead ends: 2166 [2019-10-13 20:11:21,642 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:11:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-10-13 20:11:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-10-13 20:11:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-10-13 20:11:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-10-13 20:11:21,719 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 132 [2019-10-13 20:11:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:21,720 INFO L462 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-10-13 20:11:21,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:11:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-10-13 20:11:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 20:11:21,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:21,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:21,724 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1912923174, now seen corresponding path program 1 times [2019-10-13 20:11:21,725 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:21,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627831440] [2019-10-13 20:11:21,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:21,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:21,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:22,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627831440] [2019-10-13 20:11:22,041 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:22,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:22,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912158656] [2019-10-13 20:11:22,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:22,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:22,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:22,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:22,048 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-10-13 20:11:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:26,984 INFO L93 Difference]: Finished difference Result 5051 states and 8506 transitions. [2019-10-13 20:11:26,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:26,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-10-13 20:11:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:27,002 INFO L225 Difference]: With dead ends: 5051 [2019-10-13 20:11:27,003 INFO L226 Difference]: Without dead ends: 2911 [2019-10-13 20:11:27,009 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 20:11:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-10-13 20:11:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-10-13 20:11:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-10-13 20:11:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-10-13 20:11:27,086 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 155 [2019-10-13 20:11:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:27,086 INFO L462 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-10-13 20:11:27,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-10-13 20:11:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 20:11:27,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:27,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:27,089 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:27,090 INFO L82 PathProgramCache]: Analyzing trace with hash -775273618, now seen corresponding path program 1 times [2019-10-13 20:11:27,090 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:27,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462811567] [2019-10-13 20:11:27,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:27,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:27,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:27,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462811567] [2019-10-13 20:11:27,333 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:27,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:27,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241685468] [2019-10-13 20:11:27,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:27,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:27,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:27,337 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-10-13 20:11:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:32,152 INFO L93 Difference]: Finished difference Result 6543 states and 10148 transitions. [2019-10-13 20:11:32,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:32,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-13 20:11:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:32,171 INFO L225 Difference]: With dead ends: 6543 [2019-10-13 20:11:32,171 INFO L226 Difference]: Without dead ends: 3662 [2019-10-13 20:11:32,178 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 20:11:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-10-13 20:11:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-10-13 20:11:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-10-13 20:11:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-10-13 20:11:32,264 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 159 [2019-10-13 20:11:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:32,265 INFO L462 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-10-13 20:11:32,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-10-13 20:11:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-13 20:11:32,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:32,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:32,269 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:32,269 INFO L82 PathProgramCache]: Analyzing trace with hash -134030449, now seen corresponding path program 1 times [2019-10-13 20:11:32,270 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:32,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299420439] [2019-10-13 20:11:32,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:32,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:32,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:32,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299420439] [2019-10-13 20:11:32,423 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:32,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:32,423 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272903763] [2019-10-13 20:11:32,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:32,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:32,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:32,424 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-10-13 20:11:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:37,840 INFO L93 Difference]: Finished difference Result 10404 states and 14982 transitions. [2019-10-13 20:11:37,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:37,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2019-10-13 20:11:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:37,875 INFO L225 Difference]: With dead ends: 10404 [2019-10-13 20:11:37,875 INFO L226 Difference]: Without dead ends: 6768 [2019-10-13 20:11:37,885 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 20:11:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-10-13 20:11:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-10-13 20:11:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-10-13 20:11:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-10-13 20:11:38,088 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 190 [2019-10-13 20:11:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:38,089 INFO L462 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-10-13 20:11:38,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-10-13 20:11:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 20:11:38,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:38,095 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, 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] [2019-10-13 20:11:38,096 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:38,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1362369649, now seen corresponding path program 1 times [2019-10-13 20:11:38,096 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:38,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329483219] [2019-10-13 20:11:38,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:38,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:38,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:38,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329483219] [2019-10-13 20:11:38,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545605714] [2019-10-13 20:11:38,268 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 20:11:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:38,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:11:38,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 20:11:38,521 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:38,675 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:11:38,675 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-13 20:11:38,676 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065098044] [2019-10-13 20:11:38,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:38,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:38,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:38,678 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 5 states.