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_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:29,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:29,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:29,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:29,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:29,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:29,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:29,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:29,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:29,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:29,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:29,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:29,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:29,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:29,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:29,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:29,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:29,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:29,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:29,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:29,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:29,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:29,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:29,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:29,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:29,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:29,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:29,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:29,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:10:29,920 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:29,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:29,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:29,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:29,922 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:29,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:29,922 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:29,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:29,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:29,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:29,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:29,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:29,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:29,924 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:29,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:29,924 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:29,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:29,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:29,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:29,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:29,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:29,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:29,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:29,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:29,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:29,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:29,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:29,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:29,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:10:30,217 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:30,231 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:30,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:30,236 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:30,237 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:30,238 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label46.c [2019-10-15 00:10:30,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1001144ab/d4a1f40e9d6f4c10989651c086449a43/FLAGe7f25cc8c [2019-10-15 00:10:31,090 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:31,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label46.c [2019-10-15 00:10:31,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1001144ab/d4a1f40e9d6f4c10989651c086449a43/FLAGe7f25cc8c [2019-10-15 00:10:31,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1001144ab/d4a1f40e9d6f4c10989651c086449a43 [2019-10-15 00:10:31,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:31,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:31,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:31,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:31,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:31,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:31" (1/1) ... [2019-10-15 00:10:31,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb7c29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:31, skipping insertion in model container [2019-10-15 00:10:31,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:31" (1/1) ... [2019-10-15 00:10:31,222 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:31,347 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:32,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:32,792 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:33,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:33,287 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:33,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33 WrapperNode [2019-10-15 00:10:33,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:33,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:33,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:33,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:33,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (1/1) ... [2019-10-15 00:10:33,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (1/1) ... [2019-10-15 00:10:33,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (1/1) ... [2019-10-15 00:10:33,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (1/1) ... [2019-10-15 00:10:33,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (1/1) ... [2019-10-15 00:10:33,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (1/1) ... [2019-10-15 00:10:33,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (1/1) ... [2019-10-15 00:10:33,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:33,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:33,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:33,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:33,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:33,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:33,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:33,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:33,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:33,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:33,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:33,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:33,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:33,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:37,501 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:37,501 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:37,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:37 BoogieIcfgContainer [2019-10-15 00:10:37,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:37,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:37,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:37,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:37,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:31" (1/3) ... [2019-10-15 00:10:37,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e60138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:37, skipping insertion in model container [2019-10-15 00:10:37,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:33" (2/3) ... [2019-10-15 00:10:37,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e60138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:37, skipping insertion in model container [2019-10-15 00:10:37,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:37" (3/3) ... [2019-10-15 00:10:37,512 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label46.c [2019-10-15 00:10:37,523 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:37,533 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:37,545 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:37,587 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:37,587 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:37,587 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:37,587 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:37,587 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:37,588 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:37,588 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:37,588 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 00:10:37,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:37,637 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] [2019-10-15 00:10:37,639 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1888007721, now seen corresponding path program 1 times [2019-10-15 00:10:37,655 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:37,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610181146] [2019-10-15 00:10:37,656 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:37,656 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:37,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:37,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610181146] [2019-10-15 00:10:37,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:37,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:37,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805367053] [2019-10-15 00:10:37,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:37,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:38,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:38,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:38,013 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:42,539 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:42,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:42,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2019-10-15 00:10:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:42,584 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:42,584 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:42,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-15 00:10:42,757 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 42 [2019-10-15 00:10:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:42,758 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-15 00:10:42,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-15 00:10:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 00:10:42,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:42,766 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:42,767 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:42,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1067945283, now seen corresponding path program 1 times [2019-10-15 00:10:42,768 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:42,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367419620] [2019-10-15 00:10:42,769 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:42,769 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:42,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:43,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367419620] [2019-10-15 00:10:43,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:43,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:43,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893881263] [2019-10-15 00:10:43,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:43,037 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:43,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:43,038 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-15 00:10:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:48,326 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-15 00:10:48,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:48,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2019-10-15 00:10:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:48,346 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:48,347 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:48,351 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 00:10:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-15 00:10:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:10:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5127 transitions. [2019-10-15 00:10:48,428 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5127 transitions. Word has length 115 [2019-10-15 00:10:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:48,429 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 5127 transitions. [2019-10-15 00:10:48,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5127 transitions. [2019-10-15 00:10:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 00:10:48,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:48,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:48,433 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:48,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1328815240, now seen corresponding path program 1 times [2019-10-15 00:10:48,433 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:48,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473450702] [2019-10-15 00:10:48,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:48,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:48,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:48,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473450702] [2019-10-15 00:10:48,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:48,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:48,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758817838] [2019-10-15 00:10:48,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:48,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:48,594 INFO L87 Difference]: Start difference. First operand 2864 states and 5127 transitions. Second operand 5 states. [2019-10-15 00:10:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:54,477 INFO L93 Difference]: Finished difference Result 8048 states and 14478 transitions. [2019-10-15 00:10:54,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:10:54,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-10-15 00:10:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:54,503 INFO L225 Difference]: With dead ends: 8048 [2019-10-15 00:10:54,504 INFO L226 Difference]: Without dead ends: 5190 [2019-10-15 00:10:54,511 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:10:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2019-10-15 00:10:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 5092. [2019-10-15 00:10:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5092 states. [2019-10-15 00:10:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 8027 transitions. [2019-10-15 00:10:54,643 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 8027 transitions. Word has length 118 [2019-10-15 00:10:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:54,643 INFO L462 AbstractCegarLoop]: Abstraction has 5092 states and 8027 transitions. [2019-10-15 00:10:54,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 8027 transitions. [2019-10-15 00:10:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-15 00:10:54,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:54,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:54,647 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1516460572, now seen corresponding path program 1 times [2019-10-15 00:10:54,648 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:54,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879163431] [2019-10-15 00:10:54,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:54,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:54,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:54,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879163431] [2019-10-15 00:10:54,783 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:54,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:54,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915189256] [2019-10-15 00:10:54,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:54,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:54,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:54,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:54,786 INFO L87 Difference]: Start difference. First operand 5092 states and 8027 transitions. Second operand 4 states. [2019-10-15 00:11:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:11:01,594 INFO L93 Difference]: Finished difference Result 20168 states and 33052 transitions. [2019-10-15 00:11:01,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:11:01,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-10-15 00:11:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:11:01,678 INFO L225 Difference]: With dead ends: 20168 [2019-10-15 00:11:01,678 INFO L226 Difference]: Without dead ends: 15082 [2019-10-15 00:11:01,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:11:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15082 states. [2019-10-15 00:11:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15082 to 15082. [2019-10-15 00:11:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15082 states. [2019-10-15 00:11:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15082 states to 15082 states and 22373 transitions. [2019-10-15 00:11:02,122 INFO L78 Accepts]: Start accepts. Automaton has 15082 states and 22373 transitions. Word has length 148 [2019-10-15 00:11:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:11:02,124 INFO L462 AbstractCegarLoop]: Abstraction has 15082 states and 22373 transitions. [2019-10-15 00:11:02,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:11:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 15082 states and 22373 transitions. [2019-10-15 00:11:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-15 00:11:02,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:11:02,134 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:11:02,134 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:11:02,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:11:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash 427642708, now seen corresponding path program 1 times [2019-10-15 00:11:02,135 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:11:02,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259599422] [2019-10-15 00:11:02,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:02,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:02,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:11:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:11:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 70 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:11:02,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259599422] [2019-10-15 00:11:02,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653884687] [2019-10-15 00:11:02,315 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 00:11:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:11:02,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:11:02,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:11:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 00:11:02,658 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:11:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 70 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:11:02,823 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:11:02,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-15 00:11:02,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993982848] [2019-10-15 00:11:02,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:11:02,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:11:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:11:02,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:11:02,826 INFO L87 Difference]: Start difference. First operand 15082 states and 22373 transitions. Second operand 5 states.