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/Problem10_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:01:01,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:01:01,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:01:01,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:01:01,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:01:01,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:01:01,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:01:01,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:01:01,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:01:01,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:01:01,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:01:01,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:01:01,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:01:01,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:01:01,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:01:01,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:01:01,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:01:01,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:01:01,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:01:01,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:01:01,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:01:01,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:01:01,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:01:01,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:01:01,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:01:01,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:01:01,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:01:01,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:01:01,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:01:01,648 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:01:01,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:01:01,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:01:01,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:01:01,650 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:01:01,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:01:01,650 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:01:01,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:01:01,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:01:01,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:01:01,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:01:01,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:01:01,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:01:01,652 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:01:01,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:01:01,652 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:01:01,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:01:01,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:01:01,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:01:01,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:01:01,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:01:01,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:01:01,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:01:01,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:01:01,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:01:01,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:01:01,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:01:01,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:01:01,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:01:01,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:01:02,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:01:02,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:01:02,025 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:01:02,025 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:01:02,026 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-10-15 00:01:02,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b66cbb38b/ab12f2bd63184882b4ba5af83cdd9b3c/FLAGa1aaf2d1e [2019-10-15 00:01:02,607 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:01:02,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-10-15 00:01:02,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b66cbb38b/ab12f2bd63184882b4ba5af83cdd9b3c/FLAGa1aaf2d1e [2019-10-15 00:01:02,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b66cbb38b/ab12f2bd63184882b4ba5af83cdd9b3c [2019-10-15 00:01:02,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:01:02,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:01:02,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:02,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:01:02,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:01:02,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:02" (1/1) ... [2019-10-15 00:01:02,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61791d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:02, skipping insertion in model container [2019-10-15 00:01:02,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:02" (1/1) ... [2019-10-15 00:01:02,903 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:01:02,957 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:01:03,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:03,452 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:01:03,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:03,700 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:01:03,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03 WrapperNode [2019-10-15 00:01:03,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:03,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:01:03,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:01:03,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:01:03,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... [2019-10-15 00:01:03,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:01:03,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:01:03,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:01:03,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:01:03,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:01:03,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:01:03,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:01:03,902 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:01:03,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:01:03,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:01:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:01:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:01:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:01:03,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:01:03,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:01:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:01:05,417 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:01:05,417 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:01:05,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:05 BoogieIcfgContainer [2019-10-15 00:01:05,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:01:05,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:01:05,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:01:05,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:01:05,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:01:02" (1/3) ... [2019-10-15 00:01:05,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4782e28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:05, skipping insertion in model container [2019-10-15 00:01:05,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:03" (2/3) ... [2019-10-15 00:01:05,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4782e28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:05, skipping insertion in model container [2019-10-15 00:01:05,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:05" (3/3) ... [2019-10-15 00:01:05,428 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label25.c [2019-10-15 00:01:05,438 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:01:05,446 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:01:05,458 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:01:05,486 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:01:05,487 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:01:05,487 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:01:05,487 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:01:05,487 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:01:05,487 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:01:05,488 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:01:05,488 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:01:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:01:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-15 00:01:05,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:05,542 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] [2019-10-15 00:01:05,546 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1015003737, now seen corresponding path program 1 times [2019-10-15 00:01:05,563 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:05,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755470324] [2019-10-15 00:01:05,564 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,564 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:06,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755470324] [2019-10-15 00:01:06,029 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:06,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:01:06,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736333367] [2019-10-15 00:01:06,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:01:06,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:06,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:01:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:01:06,064 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:01:07,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:07,173 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:01:07,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:01:07,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2019-10-15 00:01:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:07,207 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:01:07,208 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:01:07,221 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:01:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:01:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:01:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:01:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2019-10-15 00:01:07,336 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 70 [2019-10-15 00:01:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:07,337 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2019-10-15 00:01:07,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:01:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2019-10-15 00:01:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-15 00:01:07,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:07,346 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:07,346 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:07,346 INFO L82 PathProgramCache]: Analyzing trace with hash -195666983, now seen corresponding path program 1 times [2019-10-15 00:01:07,347 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:07,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789101753] [2019-10-15 00:01:07,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:07,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:07,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:07,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789101753] [2019-10-15 00:01:07,601 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:07,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:07,602 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727721864] [2019-10-15 00:01:07,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:07,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:07,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:07,605 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand 6 states. [2019-10-15 00:01:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:08,534 INFO L93 Difference]: Finished difference Result 741 states and 1061 transitions. [2019-10-15 00:01:08,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:08,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-10-15 00:01:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:08,539 INFO L225 Difference]: With dead ends: 741 [2019-10-15 00:01:08,539 INFO L226 Difference]: Without dead ends: 453 [2019-10-15 00:01:08,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:08,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-15 00:01:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-15 00:01:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-15 00:01:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2019-10-15 00:01:08,567 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 139 [2019-10-15 00:01:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:08,568 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2019-10-15 00:01:08,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2019-10-15 00:01:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 00:01:08,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:08,572 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:01:08,573 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1516573211, now seen corresponding path program 1 times [2019-10-15 00:01:08,573 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:08,574 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388809562] [2019-10-15 00:01:08,574 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:08,574 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:08,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:08,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388809562] [2019-10-15 00:01:08,781 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:08,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:01:08,782 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507574601] [2019-10-15 00:01:08,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:08,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:08,785 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand 4 states. [2019-10-15 00:01:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:09,961 INFO L93 Difference]: Finished difference Result 1609 states and 2232 transitions. [2019-10-15 00:01:09,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:09,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-15 00:01:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:09,970 INFO L225 Difference]: With dead ends: 1609 [2019-10-15 00:01:09,970 INFO L226 Difference]: Without dead ends: 735 [2019-10-15 00:01:09,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-15 00:01:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 592. [2019-10-15 00:01:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-15 00:01:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 801 transitions. [2019-10-15 00:01:10,003 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 801 transitions. Word has length 149 [2019-10-15 00:01:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:10,004 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 801 transitions. [2019-10-15 00:01:10,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 801 transitions. [2019-10-15 00:01:10,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-15 00:01:10,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:10,010 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:01:10,011 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:10,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2032612418, now seen corresponding path program 1 times [2019-10-15 00:01:10,012 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:10,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211520910] [2019-10-15 00:01:10,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:10,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:10,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:10,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211520910] [2019-10-15 00:01:10,275 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:10,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:10,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306695567] [2019-10-15 00:01:10,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:10,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:10,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:10,279 INFO L87 Difference]: Start difference. First operand 592 states and 801 transitions. Second operand 6 states. [2019-10-15 00:01:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:11,118 INFO L93 Difference]: Finished difference Result 1492 states and 2064 transitions. [2019-10-15 00:01:11,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:11,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 192 [2019-10-15 00:01:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:11,151 INFO L225 Difference]: With dead ends: 1492 [2019-10-15 00:01:11,151 INFO L226 Difference]: Without dead ends: 906 [2019-10-15 00:01:11,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-10-15 00:01:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 890. [2019-10-15 00:01:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-15 00:01:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1141 transitions. [2019-10-15 00:01:11,187 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1141 transitions. Word has length 192 [2019-10-15 00:01:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:11,189 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1141 transitions. [2019-10-15 00:01:11,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1141 transitions. [2019-10-15 00:01:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-10-15 00:01:11,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:11,195 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:11,195 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1889340864, now seen corresponding path program 1 times [2019-10-15 00:01:11,196 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:11,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383115149] [2019-10-15 00:01:11,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:11,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:11,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 204 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:11,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383115149] [2019-10-15 00:01:11,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572898256] [2019-10-15 00:01:11,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:11,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:01:11,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-15 00:01:11,882 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:12,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 126 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:01:12,219 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:01:12,219 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 12 [2019-10-15 00:01:12,220 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728779412] [2019-10-15 00:01:12,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:01:12,221 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:12,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:01:12,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:01:12,222 INFO L87 Difference]: Start difference. First operand 890 states and 1141 transitions. Second operand 5 states. [2019-10-15 00:01:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:13,180 INFO L93 Difference]: Finished difference Result 1943 states and 2493 transitions. [2019-10-15 00:01:13,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:13,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 239 [2019-10-15 00:01:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:13,191 INFO L225 Difference]: With dead ends: 1943 [2019-10-15 00:01:13,192 INFO L226 Difference]: Without dead ends: 1059 [2019-10-15 00:01:13,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:01:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2019-10-15 00:01:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1047. [2019-10-15 00:01:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-10-15 00:01:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1325 transitions. [2019-10-15 00:01:13,246 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1325 transitions. Word has length 239 [2019-10-15 00:01:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:13,247 INFO L462 AbstractCegarLoop]: Abstraction has 1047 states and 1325 transitions. [2019-10-15 00:01:13,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1325 transitions. [2019-10-15 00:01:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-10-15 00:01:13,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:13,255 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:01:13,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:13,463 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:13,463 INFO L82 PathProgramCache]: Analyzing trace with hash -122970787, now seen corresponding path program 1 times [2019-10-15 00:01:13,463 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:13,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351740120] [2019-10-15 00:01:13,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:13,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:13,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 261 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-15 00:01:14,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351740120] [2019-10-15 00:01:14,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318782040] [2019-10-15 00:01:14,366 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 [2019-10-15 00:01:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:14,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:14,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:14,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-15 00:01:14,616 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:14,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:14,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 261 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-15 00:01:14,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [829276905] [2019-10-15 00:01:14,908 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 310 [2019-10-15 00:01:14,971 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:14,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:01:19,353 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.