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_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:54:56,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:54:56,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:54:56,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:54:56,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:54:56,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:54:56,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:54:56,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:54:56,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:54:56,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:54:56,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:54:56,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:54:56,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:54:56,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:54:56,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:54:56,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:54:56,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:54:56,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:54:56,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:54:56,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:54:56,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:54:56,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:54:56,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:54:56,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:54:56,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:54:56,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:54:56,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:54:56,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:54:56,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:54:56,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:54:56,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:54:56,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:54:56,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:54:56,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:54:56,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:54:56,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:54:56,685 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 23:54:56,712 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:54:56,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:54:56,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:54:56,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:54:56,714 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:54:56,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:54:56,715 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:54:56,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:54:56,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:54:56,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:54:56,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:54:56,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:54:56,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:54:56,716 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:54:56,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:54:56,716 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:54:56,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:54:56,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:54:56,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:54:56,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:54:56,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:54:56,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:54:56,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:54:56,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:54:56,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:54:56,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:54:56,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:54:56,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:54:56,719 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 23:54:56,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:54:57,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:54:57,006 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:54:57,008 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:54:57,008 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:54:57,009 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2019-10-14 23:54:57,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a3b1bb79/73e5ad2cf68a4439863dc38615bd5152/FLAG93478c7bb [2019-10-14 23:54:57,682 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:54:57,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2019-10-14 23:54:57,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a3b1bb79/73e5ad2cf68a4439863dc38615bd5152/FLAG93478c7bb [2019-10-14 23:54:57,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a3b1bb79/73e5ad2cf68a4439863dc38615bd5152 [2019-10-14 23:54:57,953 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:54:57,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:54:57,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:57,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:54:57,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:54:57,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:57" (1/1) ... [2019-10-14 23:54:57,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9ac29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:57, skipping insertion in model container [2019-10-14 23:54:57,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:57" (1/1) ... [2019-10-14 23:54:57,970 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:54:58,027 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:54:58,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:58,529 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:54:58,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:58,690 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:54:58,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58 WrapperNode [2019-10-14 23:54:58,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:58,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:54:58,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:54:58,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:54:58,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (1/1) ... [2019-10-14 23:54:58,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (1/1) ... [2019-10-14 23:54:58,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (1/1) ... [2019-10-14 23:54:58,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (1/1) ... [2019-10-14 23:54:58,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (1/1) ... [2019-10-14 23:54:58,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (1/1) ... [2019-10-14 23:54:58,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (1/1) ... [2019-10-14 23:54:58,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:54:58,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:54:58,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:54:58,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:54:58,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (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 23:54:58,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:54:58,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:54:58,952 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:54:58,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:54:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:54:58,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:54:58,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:54:58,955 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:54:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:54:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:54:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:00,398 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:00,398 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:00,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:00 BoogieIcfgContainer [2019-10-14 23:55:00,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:00,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:00,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:00,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:00,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:54:57" (1/3) ... [2019-10-14 23:55:00,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20014850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:00, skipping insertion in model container [2019-10-14 23:55:00,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:58" (2/3) ... [2019-10-14 23:55:00,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20014850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:00, skipping insertion in model container [2019-10-14 23:55:00,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:00" (3/3) ... [2019-10-14 23:55:00,408 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label50.c [2019-10-14 23:55:00,418 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:00,426 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:00,437 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:00,464 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:00,464 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:00,464 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:00,465 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:00,465 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:00,465 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:00,465 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:00,466 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:55:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 23:55:00,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:00,500 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] [2019-10-14 23:55:00,502 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:00,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1653547897, now seen corresponding path program 1 times [2019-10-14 23:55:00,517 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:00,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089124201] [2019-10-14 23:55:00,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:00,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:00,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:00,918 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 23:55:00,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089124201] [2019-10-14 23:55:00,920 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:00,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:00,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467454343] [2019-10-14 23:55:00,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:00,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:00,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:00,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:00,947 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:55:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:01,900 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:55:01,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:01,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2019-10-14 23:55:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:01,926 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:55:01,927 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:55:01,938 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 23:55:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:55:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:55:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:55:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-14 23:55:02,007 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 85 [2019-10-14 23:55:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:02,008 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-14 23:55:02,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-14 23:55:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:55:02,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:02,013 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] [2019-10-14 23:55:02,014 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:02,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2076475216, now seen corresponding path program 1 times [2019-10-14 23:55:02,015 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:02,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561214290] [2019-10-14 23:55:02,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:02,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:02,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:02,169 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 23:55:02,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561214290] [2019-10-14 23:55:02,170 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:02,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:02,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051463097] [2019-10-14 23:55:02,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:02,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:02,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:02,173 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-14 23:55:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:03,027 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-10-14 23:55:03,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:03,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-14 23:55:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:03,036 INFO L225 Difference]: With dead ends: 703 [2019-10-14 23:55:03,036 INFO L226 Difference]: Without dead ends: 431 [2019-10-14 23:55:03,037 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 23:55:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-14 23:55:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-14 23:55:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-14 23:55:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-14 23:55:03,071 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 95 [2019-10-14 23:55:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:03,072 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-14 23:55:03,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-14 23:55:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:55:03,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:03,078 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] [2019-10-14 23:55:03,079 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -970621106, now seen corresponding path program 1 times [2019-10-14 23:55:03,079 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:03,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435488763] [2019-10-14 23:55:03,080 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:03,080 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:03,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:03,294 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 23:55:03,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435488763] [2019-10-14 23:55:03,295 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:03,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:03,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156845724] [2019-10-14 23:55:03,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:03,298 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:03,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:03,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:03,299 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-10-14 23:55:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:03,817 INFO L93 Difference]: Finished difference Result 1241 states and 1781 transitions. [2019-10-14 23:55:03,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:03,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-14 23:55:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:03,824 INFO L225 Difference]: With dead ends: 1241 [2019-10-14 23:55:03,824 INFO L226 Difference]: Without dead ends: 828 [2019-10-14 23:55:03,825 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 23:55:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-14 23:55:03,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-14 23:55:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-14 23:55:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1160 transitions. [2019-10-14 23:55:03,886 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1160 transitions. Word has length 96 [2019-10-14 23:55:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:03,887 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1160 transitions. [2019-10-14 23:55:03,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1160 transitions. [2019-10-14 23:55:03,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:55:03,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:03,895 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:55:03,896 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:03,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1409491302, now seen corresponding path program 1 times [2019-10-14 23:55:03,897 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:03,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625393042] [2019-10-14 23:55:03,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:03,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:03,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:04,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625393042] [2019-10-14 23:55:04,154 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:04,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:55:04,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415681647] [2019-10-14 23:55:04,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:55:04,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:55:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:55:04,156 INFO L87 Difference]: Start difference. First operand 828 states and 1160 transitions. Second operand 7 states. [2019-10-14 23:55:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:05,134 INFO L93 Difference]: Finished difference Result 2123 states and 3142 transitions. [2019-10-14 23:55:05,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:55:05,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2019-10-14 23:55:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:05,145 INFO L225 Difference]: With dead ends: 2123 [2019-10-14 23:55:05,145 INFO L226 Difference]: Without dead ends: 1301 [2019-10-14 23:55:05,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:55:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2019-10-14 23:55:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1130. [2019-10-14 23:55:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1130 states. [2019-10-14 23:55:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1509 transitions. [2019-10-14 23:55:05,221 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1509 transitions. Word has length 102 [2019-10-14 23:55:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:05,221 INFO L462 AbstractCegarLoop]: Abstraction has 1130 states and 1509 transitions. [2019-10-14 23:55:05,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:55:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1509 transitions. [2019-10-14 23:55:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:55:05,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:05,226 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:55:05,227 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1605942605, now seen corresponding path program 1 times [2019-10-14 23:55:05,228 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:05,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726202902] [2019-10-14 23:55:05,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:05,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:05,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:05,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726202902] [2019-10-14 23:55:05,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507058240] [2019-10-14 23:55:05,367 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 23:55:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:05,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:55:05,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:05,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:05,858 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-10-14 23:55:05,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:05,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:55:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:06,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1530967427] [2019-10-14 23:55:06,077 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 114 [2019-10-14 23:55:06,134 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:06,135 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)