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/Problem11_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:04:29,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:04:29,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:04:29,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:04:29,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:04:29,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:04:29,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:04:29,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:04:29,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:04:29,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:04:29,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:04:29,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:04:29,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:04:29,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:04:29,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:04:29,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:04:29,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:04:29,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:04:29,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:04:29,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:04:29,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:04:29,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:04:29,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:04:29,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:04:29,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:04:29,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:04:29,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:04:29,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:04:29,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:04:29,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:04:29,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:04:29,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:04:29,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:04:29,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:04:29,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:04:29,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:04:29,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:04:29,535 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:04:29,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:04:29,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:04:29,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:04:29,537 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:04:29,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:04:29,538 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:04:29,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:04:29,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:04:29,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:04:29,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:04:29,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:04:29,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:04:29,539 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:04:29,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:04:29,539 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:04:29,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:04:29,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:04:29,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:04:29,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:04:29,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:04:29,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:29,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:04:29,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:04:29,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:04:29,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:04:29,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:04:29,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:04:29,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:04:29,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:04:29,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:04:29,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:04:29,839 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:04:29,840 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:04:29,841 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-10-13 20:04:29,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bccdfd512/853d7a9a1ec443b980b225d3b051e201/FLAGa7fd66b08 [2019-10-13 20:04:30,549 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:04:30,550 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-10-13 20:04:30,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bccdfd512/853d7a9a1ec443b980b225d3b051e201/FLAGa7fd66b08 [2019-10-13 20:04:30,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bccdfd512/853d7a9a1ec443b980b225d3b051e201 [2019-10-13 20:04:30,802 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:04:30,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:04:30,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:30,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:04:30,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:04:30,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:30" (1/1) ... [2019-10-13 20:04:30,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4924bc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:30, skipping insertion in model container [2019-10-13 20:04:30,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:30" (1/1) ... [2019-10-13 20:04:30,821 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:04:30,898 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:04:31,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:31,643 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:04:31,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:31,851 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:04:31,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31 WrapperNode [2019-10-13 20:04:31,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:31,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:04:31,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:04:31,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:04:31,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (1/1) ... [2019-10-13 20:04:31,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (1/1) ... [2019-10-13 20:04:31,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (1/1) ... [2019-10-13 20:04:31,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (1/1) ... [2019-10-13 20:04:31,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (1/1) ... [2019-10-13 20:04:31,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (1/1) ... [2019-10-13 20:04:32,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (1/1) ... [2019-10-13 20:04:32,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:04:32,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:04:32,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:04:32,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:04:32,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:32,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:04:32,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:04:32,072 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:04:32,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:04:32,072 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:04:32,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:04:32,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:04:32,073 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:04:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:04:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:04:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:04:33,799 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:04:33,799 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:04:33,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:33 BoogieIcfgContainer [2019-10-13 20:04:33,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:04:33,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:04:33,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:04:33,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:04:33,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:30" (1/3) ... [2019-10-13 20:04:33,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cda1f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:33, skipping insertion in model container [2019-10-13 20:04:33,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:31" (2/3) ... [2019-10-13 20:04:33,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cda1f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:33, skipping insertion in model container [2019-10-13 20:04:33,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:33" (3/3) ... [2019-10-13 20:04:33,810 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label29.c [2019-10-13 20:04:33,820 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:04:33,829 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:04:33,840 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:04:33,870 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:04:33,870 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:04:33,871 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:04:33,871 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:04:33,871 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:04:33,871 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:04:33,872 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:04:33,872 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:04:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:04:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 20:04:33,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:33,912 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] [2019-10-13 20:04:33,914 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2007465363, now seen corresponding path program 1 times [2019-10-13 20:04:33,929 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:33,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389679064] [2019-10-13 20:04:33,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:33,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:33,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:34,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389679064] [2019-10-13 20:04:34,248 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:34,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:04:34,249 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656761422] [2019-10-13 20:04:34,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:34,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:34,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:34,280 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-13 20:04:35,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:35,685 INFO L93 Difference]: Finished difference Result 782 states and 1375 transitions. [2019-10-13 20:04:35,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:35,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2019-10-13 20:04:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:35,708 INFO L225 Difference]: With dead ends: 782 [2019-10-13 20:04:35,710 INFO L226 Difference]: Without dead ends: 428 [2019-10-13 20:04:35,723 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-10-13 20:04:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 420. [2019-10-13 20:04:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-13 20:04:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 671 transitions. [2019-10-13 20:04:35,826 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 671 transitions. Word has length 26 [2019-10-13 20:04:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:35,827 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 671 transitions. [2019-10-13 20:04:35,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 671 transitions. [2019-10-13 20:04:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 20:04:35,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:35,837 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:04:35,837 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:35,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:35,839 INFO L82 PathProgramCache]: Analyzing trace with hash -954827699, now seen corresponding path program 1 times [2019-10-13 20:04:35,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:35,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625249908] [2019-10-13 20:04:35,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:35,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:35,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:36,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625249908] [2019-10-13 20:04:36,144 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:36,145 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:04:36,145 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579701984] [2019-10-13 20:04:36,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:04:36,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:04:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:04:36,149 INFO L87 Difference]: Start difference. First operand 420 states and 671 transitions. Second operand 6 states. [2019-10-13 20:04:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:37,996 INFO L93 Difference]: Finished difference Result 1253 states and 2034 transitions. [2019-10-13 20:04:37,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 20:04:37,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-13 20:04:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:38,005 INFO L225 Difference]: With dead ends: 1253 [2019-10-13 20:04:38,005 INFO L226 Difference]: Without dead ends: 839 [2019-10-13 20:04:38,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:04:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-10-13 20:04:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 817. [2019-10-13 20:04:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2019-10-13 20:04:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1173 transitions. [2019-10-13 20:04:38,059 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1173 transitions. Word has length 95 [2019-10-13 20:04:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:38,059 INFO L462 AbstractCegarLoop]: Abstraction has 817 states and 1173 transitions. [2019-10-13 20:04:38,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:04:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1173 transitions. [2019-10-13 20:04:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 20:04:38,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:38,062 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:04:38,062 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1471750030, now seen corresponding path program 1 times [2019-10-13 20:04:38,063 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:38,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326863925] [2019-10-13 20:04:38,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:38,064 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:38,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:38,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326863925] [2019-10-13 20:04:38,229 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:38,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:04:38,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740264897] [2019-10-13 20:04:38,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:04:38,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:04:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:04:38,231 INFO L87 Difference]: Start difference. First operand 817 states and 1173 transitions. Second operand 6 states. [2019-10-13 20:04:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:39,786 INFO L93 Difference]: Finished difference Result 2046 states and 2971 transitions. [2019-10-13 20:04:39,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:39,787 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-13 20:04:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:39,799 INFO L225 Difference]: With dead ends: 2046 [2019-10-13 20:04:39,799 INFO L226 Difference]: Without dead ends: 1235 [2019-10-13 20:04:39,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:04:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2019-10-13 20:04:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1221. [2019-10-13 20:04:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2019-10-13 20:04:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1724 transitions. [2019-10-13 20:04:39,866 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1724 transitions. Word has length 98 [2019-10-13 20:04:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:39,867 INFO L462 AbstractCegarLoop]: Abstraction has 1221 states and 1724 transitions. [2019-10-13 20:04:39,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:04:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1724 transitions. [2019-10-13 20:04:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 20:04:39,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:39,877 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:04:39,877 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:39,877 INFO L82 PathProgramCache]: Analyzing trace with hash 698002821, now seen corresponding path program 1 times [2019-10-13 20:04:39,878 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:39,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952139772] [2019-10-13 20:04:39,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:39,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:39,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:40,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952139772] [2019-10-13 20:04:40,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622795646] [2019-10-13 20:04:40,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:40,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:04:40,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:40,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:40,317 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:40,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:40,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:40,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:40,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:40,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:40,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:40,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:40,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:40,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:40,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:40,698 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:04:40,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-13 20:04:40,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096486428] [2019-10-13 20:04:40,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:04:40,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:04:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:04:40,700 INFO L87 Difference]: Start difference. First operand 1221 states and 1724 transitions. Second operand 7 states. [2019-10-13 20:04:43,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:43,117 INFO L93 Difference]: Finished difference Result 4051 states and 6041 transitions. [2019-10-13 20:04:43,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 20:04:43,118 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2019-10-13 20:04:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:43,135 INFO L225 Difference]: With dead ends: 4051 [2019-10-13 20:04:43,135 INFO L226 Difference]: Without dead ends: 2836 [2019-10-13 20:04:43,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-10-13 20:04:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-13 20:04:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2789. [2019-10-13 20:04:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2789 states. [2019-10-13 20:04:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3708 transitions. [2019-10-13 20:04:43,230 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3708 transitions. Word has length 99 [2019-10-13 20:04:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:43,231 INFO L462 AbstractCegarLoop]: Abstraction has 2789 states and 3708 transitions. [2019-10-13 20:04:43,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 20:04:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3708 transitions. [2019-10-13 20:04:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 20:04:43,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:43,233 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:04:43,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:43,438 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1349266370, now seen corresponding path program 1 times [2019-10-13 20:04:43,439 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:43,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796987265] [2019-10-13 20:04:43,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:43,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:43,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:43,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796987265] [2019-10-13 20:04:43,539 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:43,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:04:43,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394171147] [2019-10-13 20:04:43,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:43,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:43,541 INFO L87 Difference]: Start difference. First operand 2789 states and 3708 transitions. Second operand 3 states. [2019-10-13 20:04:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:44,554 INFO L93 Difference]: Finished difference Result 7093 states and 9716 transitions. [2019-10-13 20:04:44,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:44,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2019-10-13 20:04:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:44,588 INFO L225 Difference]: With dead ends: 7093 [2019-10-13 20:04:44,589 INFO L226 Difference]: Without dead ends: 4310 [2019-10-13 20:04:44,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-10-13 20:04:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4118. [2019-10-13 20:04:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4118 states. [2019-10-13 20:04:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 5297 transitions. [2019-10-13 20:04:44,726 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 5297 transitions. Word has length 157 [2019-10-13 20:04:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:44,728 INFO L462 AbstractCegarLoop]: Abstraction has 4118 states and 5297 transitions. [2019-10-13 20:04:44,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 5297 transitions. [2019-10-13 20:04:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 20:04:44,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:44,733 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:04:44,733 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1834742215, now seen corresponding path program 1 times [2019-10-13 20:04:44,734 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:44,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751918076] [2019-10-13 20:04:44,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:44,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:44,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:04:44,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751918076] [2019-10-13 20:04:44,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036529261] [2019-10-13 20:04:44,963 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 [2019-10-13 20:04:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:45,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 20:04:45,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:04:45,170 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:04:45,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:04:45,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-10-13 20:04:45,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883585380] [2019-10-13 20:04:45,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:45,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:45,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:45,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:04:45,337 INFO L87 Difference]: Start difference. First operand 4118 states and 5297 transitions. Second operand 4 states. [2019-10-13 20:04:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:46,461 INFO L93 Difference]: Finished difference Result 5288 states and 6855 transitions. [2019-10-13 20:04:46,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:46,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-13 20:04:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:46,490 INFO L225 Difference]: With dead ends: 5288 [2019-10-13 20:04:46,490 INFO L226 Difference]: Without dead ends: 5286 [2019-10-13 20:04:46,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:04:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2019-10-13 20:04:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4710. [2019-10-13 20:04:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4710 states. [2019-10-13 20:04:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 6126 transitions. [2019-10-13 20:04:46,649 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 6126 transitions. Word has length 173 [2019-10-13 20:04:46,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:46,650 INFO L462 AbstractCegarLoop]: Abstraction has 4710 states and 6126 transitions. [2019-10-13 20:04:46,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:46,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 6126 transitions. [2019-10-13 20:04:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-13 20:04:46,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:46,655 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:04:46,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:46,923 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:46,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1048573628, now seen corresponding path program 1 times [2019-10-13 20:04:46,923 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:46,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663011584] [2019-10-13 20:04:46,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:46,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:46,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:04:47,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663011584] [2019-10-13 20:04:47,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679351605] [2019-10-13 20:04:47,140 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 [2019-10-13 20:04:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:47,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 20:04:47,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:47,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:47,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:51,068 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-10-13 20:04:55,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:04:55,787 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:55,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:55,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:55,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:55,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:56,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [923142097] [2019-10-13 20:04:56,020 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 227 [2019-10-13 20:04:56,070 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:04:56,070 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)