/usr/bin/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_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:46:01,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:46:01,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:46:01,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:46:01,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:46:01,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:46:01,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:46:01,164 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 [2019-11-06 22:46:01,197 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:46:01,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:46:01,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:46:01,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:46:01,203 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:46:01,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:46:01,203 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:46:01,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:46:01,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:46:01,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:46:01,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:46:01,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:46:01,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:46:01,209 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:46:01,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:46:01,209 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:46:01,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:46:01,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:46:01,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:46:01,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:46:01,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:46:01,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:46:01,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:46:01,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:46:01,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:46:01,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:46:01,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:46:01,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:46:01,211 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 [2019-11-06 22:46:01,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:46:01,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:46:01,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:46:01,520 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:46:01,520 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:46:01,521 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label16.c [2019-11-06 22:46:01,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de7dd0cb/63163cc3c5d143e48d3505e63730253b/FLAGb8cc5317c [2019-11-06 22:46:02,135 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:46:02,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label16.c [2019-11-06 22:46:02,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de7dd0cb/63163cc3c5d143e48d3505e63730253b/FLAGb8cc5317c [2019-11-06 22:46:02,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de7dd0cb/63163cc3c5d143e48d3505e63730253b [2019-11-06 22:46:02,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:46:02,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:46:02,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:02,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:46:02,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:46:02,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:02" (1/1) ... [2019-11-06 22:46:02,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a85e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02, skipping insertion in model container [2019-11-06 22:46:02,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:02" (1/1) ... [2019-11-06 22:46:02,437 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:46:02,502 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:46:03,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:03,162 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:46:03,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:03,355 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:46:03,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03 WrapperNode [2019-11-06 22:46:03,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:03,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:46:03,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:46:03,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:46:03,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (1/1) ... [2019-11-06 22:46:03,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (1/1) ... [2019-11-06 22:46:03,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (1/1) ... [2019-11-06 22:46:03,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (1/1) ... [2019-11-06 22:46:03,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (1/1) ... [2019-11-06 22:46:03,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (1/1) ... [2019-11-06 22:46:03,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (1/1) ... [2019-11-06 22:46:03,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:46:03,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:46:03,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:46:03,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:46:03,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (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 [2019-11-06 22:46:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:46:03,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:46:03,619 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:46:03,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:46:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:46:03,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:46:03,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:46:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:46:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:46:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:46:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:46:05,645 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:46:05,646 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:46:05,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:05 BoogieIcfgContainer [2019-11-06 22:46:05,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:46:05,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:46:05,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:46:05,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:46:05,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:02" (1/3) ... [2019-11-06 22:46:05,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f119c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:05, skipping insertion in model container [2019-11-06 22:46:05,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:03" (2/3) ... [2019-11-06 22:46:05,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f119c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:05, skipping insertion in model container [2019-11-06 22:46:05,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:05" (3/3) ... [2019-11-06 22:46:05,665 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label16.c [2019-11-06 22:46:05,680 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:46:05,695 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:46:05,708 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:46:05,757 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:46:05,757 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:46:05,757 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:46:05,758 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:46:05,758 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:46:05,758 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:46:05,758 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:46:05,758 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:46:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:46:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 22:46:05,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:05,803 INFO L410 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] [2019-11-06 22:46:05,805 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:05,812 INFO L82 PathProgramCache]: Analyzing trace with hash -467621694, now seen corresponding path program 1 times [2019-11-06 22:46:05,823 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:05,824 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275077964] [2019-11-06 22:46:05,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:06,267 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275077964] [2019-11-06 22:46:06,268 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:06,268 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:06,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28858786] [2019-11-06 22:46:06,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:06,279 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:06,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:06,298 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:46:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:08,552 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-11-06 22:46:08,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:08,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2019-11-06 22:46:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:08,578 INFO L225 Difference]: With dead ends: 981 [2019-11-06 22:46:08,578 INFO L226 Difference]: Without dead ends: 622 [2019-11-06 22:46:08,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-11-06 22:46:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-11-06 22:46:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-11-06 22:46:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-11-06 22:46:08,708 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 49 [2019-11-06 22:46:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:08,709 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-11-06 22:46:08,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-11-06 22:46:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 22:46:08,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:08,719 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:08,720 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:08,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2099265230, now seen corresponding path program 1 times [2019-11-06 22:46:08,721 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:08,721 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153963636] [2019-11-06 22:46:08,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:09,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153963636] [2019-11-06 22:46:09,001 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:09,001 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:46:09,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159011983] [2019-11-06 22:46:09,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:46:09,007 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:46:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:46:09,008 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-11-06 22:46:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:11,003 INFO L93 Difference]: Finished difference Result 1837 states and 2643 transitions. [2019-11-06 22:46:11,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:46:11,004 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-11-06 22:46:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:11,012 INFO L225 Difference]: With dead ends: 1837 [2019-11-06 22:46:11,012 INFO L226 Difference]: Without dead ends: 1221 [2019-11-06 22:46:11,015 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:46:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-11-06 22:46:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-11-06 22:46:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-11-06 22:46:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-11-06 22:46:11,072 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 129 [2019-11-06 22:46:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:11,073 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-11-06 22:46:11,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:46:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-11-06 22:46:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 22:46:11,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:11,079 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:11,079 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:11,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2045537286, now seen corresponding path program 1 times [2019-11-06 22:46:11,080 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:11,080 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373815650] [2019-11-06 22:46:11,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:11,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373815650] [2019-11-06 22:46:11,355 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:11,355 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:11,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435413204] [2019-11-06 22:46:11,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:11,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:11,362 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-11-06 22:46:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:13,318 INFO L93 Difference]: Finished difference Result 4339 states and 5985 transitions. [2019-11-06 22:46:13,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:13,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2019-11-06 22:46:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:13,339 INFO L225 Difference]: With dead ends: 4339 [2019-11-06 22:46:13,339 INFO L226 Difference]: Without dead ends: 3135 [2019-11-06 22:46:13,343 INFO L630 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 [2019-11-06 22:46:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2019-11-06 22:46:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 2927. [2019-11-06 22:46:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2927 states. [2019-11-06 22:46:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 3836 transitions. [2019-11-06 22:46:13,445 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 3836 transitions. Word has length 180 [2019-11-06 22:46:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:13,446 INFO L462 AbstractCegarLoop]: Abstraction has 2927 states and 3836 transitions. [2019-11-06 22:46:13,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 3836 transitions. [2019-11-06 22:46:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-06 22:46:13,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:13,453 INFO L410 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, 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] [2019-11-06 22:46:13,453 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 817562012, now seen corresponding path program 1 times [2019-11-06 22:46:13,454 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:13,454 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287204763] [2019-11-06 22:46:13,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 84 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:46:13,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287204763] [2019-11-06 22:46:13,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197941731] [2019-11-06 22:46:13,720 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 [2019-11-06 22:46:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:13,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:46:13,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-06 22:46:13,960 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 84 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:46:14,111 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:46:14,111 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:46:14,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556952333] [2019-11-06 22:46:14,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:46:14,112 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:14,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:46:14,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:46:14,113 INFO L87 Difference]: Start difference. First operand 2927 states and 3836 transitions. Second operand 5 states. [2019-11-06 22:46:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:15,804 INFO L93 Difference]: Finished difference Result 6889 states and 9368 transitions. [2019-11-06 22:46:15,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:46:15,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2019-11-06 22:46:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:15,833 INFO L225 Difference]: With dead ends: 6889 [2019-11-06 22:46:15,833 INFO L226 Difference]: Without dead ends: 3968 [2019-11-06 22:46:15,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:46:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2019-11-06 22:46:15,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3556. [2019-11-06 22:46:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3556 states. [2019-11-06 22:46:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 4752 transitions. [2019-11-06 22:46:15,965 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 4752 transitions. Word has length 223 [2019-11-06 22:46:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:15,965 INFO L462 AbstractCegarLoop]: Abstraction has 3556 states and 4752 transitions. [2019-11-06 22:46:15,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:46:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 4752 transitions. [2019-11-06 22:46:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 22:46:15,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:15,972 INFO L410 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, 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] [2019-11-06 22:46:16,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:16,177 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1368554123, now seen corresponding path program 1 times [2019-11-06 22:46:16,178 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:16,178 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428450090] [2019-11-06 22:46:16,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:16,449 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428450090] [2019-11-06 22:46:16,449 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513483090] [2019-11-06 22:46:16,449 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 [2019-11-06 22:46:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:16,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:46:16,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:16,698 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:16,814 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2073165539] [2019-11-06 22:46:16,821 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 225 [2019-11-06 22:46:16,879 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:46:16,879 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)