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/Problem01_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:54,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:54,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:54,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:54,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:54,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:54,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:54,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:54,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:54,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:54,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:54,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:54,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:54,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:54,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:54,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:54,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:54,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:54,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:54,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:54,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:54,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:54,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:54,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:54,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:53:54,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:53:54,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:53:54,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:53:54,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:53:54,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:53:54,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:54,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:54,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:54,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:54,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:54,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:54,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:54,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:54,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:54,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:54,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:54,472 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 [2019-10-14 23:53:54,501 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:54,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:54,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:54,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:54,503 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:54,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:54,503 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:54,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:54,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:54,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:54,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:54,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:54,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:54,505 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:54,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:54,505 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:54,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:54,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:54,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:54,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:54,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:54,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:54,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:54,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:54,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:54,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:54,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:54,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:54,508 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 [2019-10-14 23:53:54,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:54,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:54,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:54,814 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:54,815 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:54,815 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label29.c [2019-10-14 23:53:54,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538daa51/bae79c38f5204146ab8f367310385eb9/FLAG0d9b2fa98 [2019-10-14 23:53:55,531 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:55,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label29.c [2019-10-14 23:53:55,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538daa51/bae79c38f5204146ab8f367310385eb9/FLAG0d9b2fa98 [2019-10-14 23:53:55,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538daa51/bae79c38f5204146ab8f367310385eb9 [2019-10-14 23:53:55,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:55,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:55,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:55,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:55,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:55,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337d46e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55, skipping insertion in model container [2019-10-14 23:53:55,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,796 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:55,856 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:56,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:56,390 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:56,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:56,522 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:56,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56 WrapperNode [2019-10-14 23:53:56,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:56,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:56,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:56,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:56,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (1/1) ... [2019-10-14 23:53:56,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (1/1) ... [2019-10-14 23:53:56,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (1/1) ... [2019-10-14 23:53:56,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (1/1) ... [2019-10-14 23:53:56,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (1/1) ... [2019-10-14 23:53:56,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (1/1) ... [2019-10-14 23:53:56,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (1/1) ... [2019-10-14 23:53:56,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:56,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:56,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:56,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:56,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (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 [2019-10-14 23:53:56,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:56,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:56,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:56,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:56,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:56,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:56,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:57,889 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:57,889 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:57,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:57 BoogieIcfgContainer [2019-10-14 23:53:57,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:57,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:57,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:57,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:57,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:55" (1/3) ... [2019-10-14 23:53:57,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4728666e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:57, skipping insertion in model container [2019-10-14 23:53:57,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:56" (2/3) ... [2019-10-14 23:53:57,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4728666e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:57, skipping insertion in model container [2019-10-14 23:53:57,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:57" (3/3) ... [2019-10-14 23:53:57,901 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label29.c [2019-10-14 23:53:57,911 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:57,919 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:57,931 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:57,963 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:57,963 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:57,964 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:57,964 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:57,965 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:57,965 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:57,965 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:57,965 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:53:58,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:58,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:58,017 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1243928705, now seen corresponding path program 1 times [2019-10-14 23:53:58,032 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:58,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456873652] [2019-10-14 23:53:58,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:58,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:58,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:58,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456873652] [2019-10-14 23:53:58,472 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:58,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:58,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209734219] [2019-10-14 23:53:58,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:58,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:58,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:58,496 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:59,356 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:59,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:59,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-10-14 23:53:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:59,379 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:59,379 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:59,391 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 [2019-10-14 23:53:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-14 23:53:59,500 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 107 [2019-10-14 23:53:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:59,501 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-14 23:53:59,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-14 23:53:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-14 23:53:59,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:59,513 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:59,514 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1742380424, now seen corresponding path program 1 times [2019-10-14 23:53:59,515 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:59,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199460591] [2019-10-14 23:53:59,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:59,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:59,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:59,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199460591] [2019-10-14 23:53:59,683 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:59,684 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:59,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490088035] [2019-10-14 23:53:59,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:59,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:59,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:59,687 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-14 23:54:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:00,408 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-10-14 23:54:00,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:00,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-10-14 23:54:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:00,415 INFO L225 Difference]: With dead ends: 703 [2019-10-14 23:54:00,416 INFO L226 Difference]: Without dead ends: 431 [2019-10-14 23:54:00,417 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 [2019-10-14 23:54:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-14 23:54:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-14 23:54:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-14 23:54:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-14 23:54:00,438 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 117 [2019-10-14 23:54:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:00,439 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-14 23:54:00,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-14 23:54:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 23:54:00,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:00,442 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:00,442 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1357354234, now seen corresponding path program 1 times [2019-10-14 23:54:00,443 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:00,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949297850] [2019-10-14 23:54:00,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:00,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:00,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:00,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949297850] [2019-10-14 23:54:00,578 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:00,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:00,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384536331] [2019-10-14 23:54:00,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:00,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:00,581 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-10-14 23:54:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:01,157 INFO L93 Difference]: Finished difference Result 1241 states and 1781 transitions. [2019-10-14 23:54:01,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:01,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-10-14 23:54:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:01,165 INFO L225 Difference]: With dead ends: 1241 [2019-10-14 23:54:01,165 INFO L226 Difference]: Without dead ends: 828 [2019-10-14 23:54:01,166 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 [2019-10-14 23:54:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-14 23:54:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-14 23:54:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-14 23:54:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1140 transitions. [2019-10-14 23:54:01,200 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1140 transitions. Word has length 118 [2019-10-14 23:54:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:01,200 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1140 transitions. [2019-10-14 23:54:01,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1140 transitions. [2019-10-14 23:54:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:54:01,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:01,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:01,206 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1051124638, now seen corresponding path program 1 times [2019-10-14 23:54:01,207 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:01,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136062137] [2019-10-14 23:54:01,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:01,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:01,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:01,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136062137] [2019-10-14 23:54:01,302 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:01,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:01,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963643759] [2019-10-14 23:54:01,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:01,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:01,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:01,304 INFO L87 Difference]: Start difference. First operand 828 states and 1140 transitions. Second operand 6 states. [2019-10-14 23:54:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:02,111 INFO L93 Difference]: Finished difference Result 2250 states and 3291 transitions. [2019-10-14 23:54:02,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:02,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-10-14 23:54:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:02,125 INFO L225 Difference]: With dead ends: 2250 [2019-10-14 23:54:02,125 INFO L226 Difference]: Without dead ends: 1428 [2019-10-14 23:54:02,128 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 [2019-10-14 23:54:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2019-10-14 23:54:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1400. [2019-10-14 23:54:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2019-10-14 23:54:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1853 transitions. [2019-10-14 23:54:02,214 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1853 transitions. Word has length 132 [2019-10-14 23:54:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:02,214 INFO L462 AbstractCegarLoop]: Abstraction has 1400 states and 1853 transitions. [2019-10-14 23:54:02,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1853 transitions. [2019-10-14 23:54:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 23:54:02,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:02,221 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:02,221 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1449351597, now seen corresponding path program 1 times [2019-10-14 23:54:02,222 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:02,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008894274] [2019-10-14 23:54:02,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:02,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:02,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:02,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008894274] [2019-10-14 23:54:02,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789861563] [2019-10-14 23:54:02,364 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 [2019-10-14 23:54:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:02,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:54:02,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:54:02,628 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:54:02,820 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:54:02,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2019-10-14 23:54:02,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543514316] [2019-10-14 23:54:02,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:54:02,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:02,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:54:02,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:02,823 INFO L87 Difference]: Start difference. First operand 1400 states and 1853 transitions. Second operand 4 states. [2019-10-14 23:54:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:03,384 INFO L93 Difference]: Finished difference Result 4033 states and 5411 transitions. [2019-10-14 23:54:03,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:54:03,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-10-14 23:54:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:03,400 INFO L225 Difference]: With dead ends: 4033 [2019-10-14 23:54:03,400 INFO L226 Difference]: Without dead ends: 2639 [2019-10-14 23:54:03,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 275 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2019-10-14 23:54:03,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2230. [2019-10-14 23:54:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2230 states. [2019-10-14 23:54:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 2936 transitions. [2019-10-14 23:54:03,485 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 2936 transitions. Word has length 141 [2019-10-14 23:54:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:03,487 INFO L462 AbstractCegarLoop]: Abstraction has 2230 states and 2936 transitions. [2019-10-14 23:54:03,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:54:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 2936 transitions. [2019-10-14 23:54:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-14 23:54:03,494 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:03,494 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:03,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:03,698 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:03,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1860694341, now seen corresponding path program 1 times [2019-10-14 23:54:03,700 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:03,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579022666] [2019-10-14 23:54:03,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:03,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:03,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:03,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579022666] [2019-10-14 23:54:03,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769601460] [2019-10-14 23:54:03,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:03,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:03,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:54:03,979 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:54:04,047 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:54:04,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:54:04,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683593361] [2019-10-14 23:54:04,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:04,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:04,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:04,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:54:04,050 INFO L87 Difference]: Start difference. First operand 2230 states and 2936 transitions. Second operand 3 states. [2019-10-14 23:54:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:04,677 INFO L93 Difference]: Finished difference Result 6094 states and 8179 transitions. [2019-10-14 23:54:04,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:04,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2019-10-14 23:54:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:04,708 INFO L225 Difference]: With dead ends: 6094 [2019-10-14 23:54:04,708 INFO L226 Difference]: Without dead ends: 3870 [2019-10-14 23:54:04,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:54:04,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2019-10-14 23:54:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3870. [2019-10-14 23:54:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3870 states. [2019-10-14 23:54:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 5003 transitions. [2019-10-14 23:54:04,860 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 5003 transitions. Word has length 143 [2019-10-14 23:54:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:04,861 INFO L462 AbstractCegarLoop]: Abstraction has 3870 states and 5003 transitions. [2019-10-14 23:54:04,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 5003 transitions. [2019-10-14 23:54:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:54:04,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:04,876 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:05,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:05,082 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:05,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1424434759, now seen corresponding path program 1 times [2019-10-14 23:54:05,083 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:05,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55870340] [2019-10-14 23:54:05,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:05,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:05,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:05,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55870340] [2019-10-14 23:54:05,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645181624] [2019-10-14 23:54:05,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:05,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:05,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:54:05,407 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:54:05,457 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:54:05,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-14 23:54:05,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532803647] [2019-10-14 23:54:05,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:54:05,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:54:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:54:05,460 INFO L87 Difference]: Start difference. First operand 3870 states and 5003 transitions. Second operand 4 states. [2019-10-14 23:54:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:06,208 INFO L93 Difference]: Finished difference Result 9090 states and 11769 transitions. [2019-10-14 23:54:06,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:54:06,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-14 23:54:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:06,236 INFO L225 Difference]: With dead ends: 9090 [2019-10-14 23:54:06,236 INFO L226 Difference]: Without dead ends: 5361 [2019-10-14 23:54:06,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:54:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2019-10-14 23:54:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 3592. [2019-10-14 23:54:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3592 states. [2019-10-14 23:54:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 4383 transitions. [2019-10-14 23:54:06,432 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 4383 transitions. Word has length 149 [2019-10-14 23:54:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:06,433 INFO L462 AbstractCegarLoop]: Abstraction has 3592 states and 4383 transitions. [2019-10-14 23:54:06,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:54:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 4383 transitions. [2019-10-14 23:54:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-14 23:54:06,447 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:06,447 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:06,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:06,653 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2121694836, now seen corresponding path program 1 times [2019-10-14 23:54:06,654 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:06,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801621325] [2019-10-14 23:54:06,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:06,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:06,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:54:06,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801621325] [2019-10-14 23:54:06,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570650643] [2019-10-14 23:54:06,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:06,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:06,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:54:06,946 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:54:07,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [128743674] [2019-10-14 23:54:07,034 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 165 [2019-10-14 23:54:07,095 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:07,096 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)