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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:04,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:04,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:04,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:04,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:04,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:04,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:04,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:04,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:04,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:04,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:04,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:04,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:04,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:04,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:04,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:04,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:04,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:04,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:04,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:04,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:04,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:04,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:04,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:04,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:04,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:04,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:04,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:04,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:04,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:04,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:04,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:04,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:04,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:04,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:04,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:04,646 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 20:11:04,669 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:04,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:04,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:04,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:04,673 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:04,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:04,673 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:04,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:04,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:04,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:04,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:04,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:04,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:04,675 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:04,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:04,675 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:04,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:04,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:04,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:04,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:04,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:04,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:04,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:04,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:04,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:04,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:04,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:04,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:04,678 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 20:11:04,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:04,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:04,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:04,989 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:04,990 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:04,990 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-10-13 20:11:05,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70909fbc3/3bbf519fbeb04f889f55b7e7b4ef01fa/FLAG67b9437ae [2019-10-13 20:11:05,819 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:05,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-10-13 20:11:05,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70909fbc3/3bbf519fbeb04f889f55b7e7b4ef01fa/FLAG67b9437ae [2019-10-13 20:11:05,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70909fbc3/3bbf519fbeb04f889f55b7e7b4ef01fa [2019-10-13 20:11:05,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:05,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:05,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:05,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:05,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:05,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:05" (1/1) ... [2019-10-13 20:11:05,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18da5b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:05, skipping insertion in model container [2019-10-13 20:11:05,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:05" (1/1) ... [2019-10-13 20:11:05,965 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:06,094 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:07,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:07,496 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:07,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:07,987 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:07,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07 WrapperNode [2019-10-13 20:11:07,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:07,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:07,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:07,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:08,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (1/1) ... [2019-10-13 20:11:08,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (1/1) ... [2019-10-13 20:11:08,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (1/1) ... [2019-10-13 20:11:08,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (1/1) ... [2019-10-13 20:11:08,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (1/1) ... [2019-10-13 20:11:08,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (1/1) ... [2019-10-13 20:11:08,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (1/1) ... [2019-10-13 20:11:08,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:08,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:08,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:08,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:08,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (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 20:11:08,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:08,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:08,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:08,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:08,352 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:08,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:08,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:08,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:12,300 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:12,300 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:12,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:12 BoogieIcfgContainer [2019-10-13 20:11:12,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:12,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:12,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:12,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:12,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:05" (1/3) ... [2019-10-13 20:11:12,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e96608d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:12, skipping insertion in model container [2019-10-13 20:11:12,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:07" (2/3) ... [2019-10-13 20:11:12,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e96608d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:12, skipping insertion in model container [2019-10-13 20:11:12,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:12" (3/3) ... [2019-10-13 20:11:12,318 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label26.c [2019-10-13 20:11:12,334 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:12,345 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:12,359 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:12,409 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:12,409 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:12,410 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:12,410 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:12,410 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:12,410 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:12,410 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:12,411 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 20:11:12,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:12,477 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:12,480 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:12,486 INFO L82 PathProgramCache]: Analyzing trace with hash 835114033, now seen corresponding path program 1 times [2019-10-13 20:11:12,496 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:12,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733386594] [2019-10-13 20:11:12,497 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:12,497 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:12,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:12,972 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 20:11:12,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733386594] [2019-10-13 20:11:12,974 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:12,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:12,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024159354] [2019-10-13 20:11:12,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:12,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:12,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:12,998 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:17,580 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:17,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:17,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-10-13 20:11:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:17,635 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:17,635 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:17,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-13 20:11:17,822 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 68 [2019-10-13 20:11:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:17,823 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-13 20:11:17,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-13 20:11:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:11:17,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:17,837 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:17,838 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:17,839 INFO L82 PathProgramCache]: Analyzing trace with hash 506598757, now seen corresponding path program 1 times [2019-10-13 20:11:17,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:17,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710607145] [2019-10-13 20:11:17,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:17,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:17,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:18,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710607145] [2019-10-13 20:11:18,065 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:18,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:18,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458219535] [2019-10-13 20:11:18,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:18,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:18,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:18,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:18,069 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-13 20:11:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:23,438 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-13 20:11:23,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:23,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-13 20:11:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:23,457 INFO L225 Difference]: With dead ends: 4294 [2019-10-13 20:11:23,457 INFO L226 Difference]: Without dead ends: 2888 [2019-10-13 20:11:23,461 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 20:11:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-13 20:11:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-13 20:11:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-13 20:11:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4749 transitions. [2019-10-13 20:11:23,546 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4749 transitions. Word has length 141 [2019-10-13 20:11:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:23,548 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4749 transitions. [2019-10-13 20:11:23,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4749 transitions. [2019-10-13 20:11:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 20:11:23,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:23,560 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:11:23,560 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash 288076576, now seen corresponding path program 1 times [2019-10-13 20:11:23,562 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:23,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357990744] [2019-10-13 20:11:23,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:23,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:23,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:23,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357990744] [2019-10-13 20:11:23,705 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:23,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:11:23,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888085128] [2019-10-13 20:11:23,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:23,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:23,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:11:23,707 INFO L87 Difference]: Start difference. First operand 2864 states and 4749 transitions. Second operand 5 states. [2019-10-13 20:11:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:29,470 INFO L93 Difference]: Finished difference Result 8754 states and 14707 transitions. [2019-10-13 20:11:29,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:11:29,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2019-10-13 20:11:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:29,504 INFO L225 Difference]: With dead ends: 8754 [2019-10-13 20:11:29,505 INFO L226 Difference]: Without dead ends: 5896 [2019-10-13 20:11:29,512 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 20:11:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2019-10-13 20:11:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 5815. [2019-10-13 20:11:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5815 states. [2019-10-13 20:11:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5815 states to 5815 states and 8477 transitions. [2019-10-13 20:11:29,679 INFO L78 Accepts]: Start accepts. Automaton has 5815 states and 8477 transitions. Word has length 144 [2019-10-13 20:11:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:29,679 INFO L462 AbstractCegarLoop]: Abstraction has 5815 states and 8477 transitions. [2019-10-13 20:11:29,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:11:29,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5815 states and 8477 transitions. [2019-10-13 20:11:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 20:11:29,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:29,683 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:29,683 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash 647429316, now seen corresponding path program 1 times [2019-10-13 20:11:29,684 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:29,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069926377] [2019-10-13 20:11:29,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:29,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:29,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:29,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069926377] [2019-10-13 20:11:29,931 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:29,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:11:29,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775979171] [2019-10-13 20:11:29,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:29,933 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:29,933 INFO L87 Difference]: Start difference. First operand 5815 states and 8477 transitions. Second operand 4 states. [2019-10-13 20:11:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:36,468 INFO L93 Difference]: Finished difference Result 20913 states and 32003 transitions. [2019-10-13 20:11:36,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:36,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-13 20:11:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:36,542 INFO L225 Difference]: With dead ends: 20913 [2019-10-13 20:11:36,542 INFO L226 Difference]: Without dead ends: 15104 [2019-10-13 20:11:36,559 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 [2019-10-13 20:11:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15104 states. [2019-10-13 20:11:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15104 to 15099. [2019-10-13 20:11:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15099 states. [2019-10-13 20:11:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15099 states to 15099 states and 21133 transitions. [2019-10-13 20:11:36,946 INFO L78 Accepts]: Start accepts. Automaton has 15099 states and 21133 transitions. Word has length 174 [2019-10-13 20:11:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:36,947 INFO L462 AbstractCegarLoop]: Abstraction has 15099 states and 21133 transitions. [2019-10-13 20:11:36,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 15099 states and 21133 transitions. [2019-10-13 20:11:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2019-10-13 20:11:36,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:36,964 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-10-13 20:11:36,965 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash -138076367, now seen corresponding path program 1 times [2019-10-13 20:11:36,965 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:36,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475274312] [2019-10-13 20:11:36,966 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:36,966 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:36,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 183 proven. 191 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-13 20:11:37,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475274312] [2019-10-13 20:11:37,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368231996] [2019-10-13 20:11:37,301 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 20:11:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:37,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:11:37,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-10-13 20:11:37,856 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 183 proven. 191 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-13 20:11:38,174 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:11:38,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-13 20:11:38,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643735148] [2019-10-13 20:11:38,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:38,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:38,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:11:38,178 INFO L87 Difference]: Start difference. First operand 15099 states and 21133 transitions. Second operand 5 states.