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_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:33,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:33,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:33,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:02:33,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:33,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:33,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:33,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:33,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:33,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:33,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:33,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:33,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:33,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:33,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:33,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:33,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:33,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:33,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:33,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:33,853 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 00:02:33,872 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:33,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:33,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:33,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:33,874 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:33,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:33,875 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:33,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:33,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:33,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:33,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:33,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:33,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:33,876 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:33,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:33,877 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:33,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:33,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:33,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:33,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:33,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:33,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:33,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:33,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:33,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:33,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:33,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:33,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:33,879 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 00:02:34,200 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:34,213 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:34,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:34,218 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:34,218 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:34,219 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label06.c [2019-10-15 00:02:34,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ccec094/a290a454429f418d8c947260e57e0ee8/FLAG5295f14f9 [2019-10-15 00:02:34,883 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:34,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label06.c [2019-10-15 00:02:34,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ccec094/a290a454429f418d8c947260e57e0ee8/FLAG5295f14f9 [2019-10-15 00:02:35,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ccec094/a290a454429f418d8c947260e57e0ee8 [2019-10-15 00:02:35,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:35,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:35,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:35,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:35,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:35,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:35" (1/1) ... [2019-10-15 00:02:35,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8c4659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:35, skipping insertion in model container [2019-10-15 00:02:35,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:35" (1/1) ... [2019-10-15 00:02:35,180 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:35,252 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:35,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:35,883 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:36,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:36,208 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:36,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36 WrapperNode [2019-10-15 00:02:36,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:36,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:36,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:36,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:36,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (1/1) ... [2019-10-15 00:02:36,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (1/1) ... [2019-10-15 00:02:36,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (1/1) ... [2019-10-15 00:02:36,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (1/1) ... [2019-10-15 00:02:36,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (1/1) ... [2019-10-15 00:02:36,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (1/1) ... [2019-10-15 00:02:36,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (1/1) ... [2019-10-15 00:02:36,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:36,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:36,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:36,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:36,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (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 00:02:36,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:36,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:36,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:36,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:38,472 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:38,472 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:38,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:38 BoogieIcfgContainer [2019-10-15 00:02:38,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:38,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:38,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:38,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:38,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:35" (1/3) ... [2019-10-15 00:02:38,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a77341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:38, skipping insertion in model container [2019-10-15 00:02:38,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:36" (2/3) ... [2019-10-15 00:02:38,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a77341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:38, skipping insertion in model container [2019-10-15 00:02:38,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:38" (3/3) ... [2019-10-15 00:02:38,495 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label06.c [2019-10-15 00:02:38,506 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:38,517 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:38,531 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:38,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:38,572 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:38,572 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:38,572 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:38,572 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:38,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:38,573 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:38,573 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:02:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-15 00:02:38,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:38,621 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] [2019-10-15 00:02:38,623 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1780384174, now seen corresponding path program 1 times [2019-10-15 00:02:38,639 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:38,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652117145] [2019-10-15 00:02:38,640 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:38,640 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:38,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:39,030 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 00:02:39,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652117145] [2019-10-15 00:02:39,032 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:39,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:39,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762641944] [2019-10-15 00:02:39,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:39,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:39,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:39,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:39,057 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:02:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:40,444 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-15 00:02:40,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:40,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-10-15 00:02:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:40,464 INFO L225 Difference]: With dead ends: 779 [2019-10-15 00:02:40,465 INFO L226 Difference]: Without dead ends: 425 [2019-10-15 00:02:40,473 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 [2019-10-15 00:02:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-15 00:02:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-15 00:02:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-15 00:02:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-10-15 00:02:40,564 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 69 [2019-10-15 00:02:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:40,568 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-10-15 00:02:40,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-10-15 00:02:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-15 00:02:40,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:40,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:40,582 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1517741782, now seen corresponding path program 1 times [2019-10-15 00:02:40,584 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:40,584 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565725390] [2019-10-15 00:02:40,584 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:40,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:40,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:40,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565725390] [2019-10-15 00:02:40,932 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:40,932 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:02:40,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264585287] [2019-10-15 00:02:40,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:40,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:40,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:40,936 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 5 states. [2019-10-15 00:02:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:43,509 INFO L93 Difference]: Finished difference Result 1987 states and 3274 transitions. [2019-10-15 00:02:43,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 00:02:43,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-10-15 00:02:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:43,522 INFO L225 Difference]: With dead ends: 1987 [2019-10-15 00:02:43,522 INFO L226 Difference]: Without dead ends: 1573 [2019-10-15 00:02:43,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2019-10-15 00:02:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1184. [2019-10-15 00:02:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-10-15 00:02:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1836 transitions. [2019-10-15 00:02:43,610 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1836 transitions. Word has length 143 [2019-10-15 00:02:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:43,611 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1836 transitions. [2019-10-15 00:02:43,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1836 transitions. [2019-10-15 00:02:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 00:02:43,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:43,617 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:43,617 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:43,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1441313139, now seen corresponding path program 1 times [2019-10-15 00:02:43,618 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:43,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337925710] [2019-10-15 00:02:43,618 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:43,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:43,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:43,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337925710] [2019-10-15 00:02:43,850 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:43,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:02:43,851 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027875586] [2019-10-15 00:02:43,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:43,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:43,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:43,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:43,855 INFO L87 Difference]: Start difference. First operand 1184 states and 1836 transitions. Second operand 5 states. [2019-10-15 00:02:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:45,373 INFO L93 Difference]: Finished difference Result 2982 states and 4740 transitions. [2019-10-15 00:02:45,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:02:45,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2019-10-15 00:02:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:45,387 INFO L225 Difference]: With dead ends: 2982 [2019-10-15 00:02:45,387 INFO L226 Difference]: Without dead ends: 1804 [2019-10-15 00:02:45,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:02:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2019-10-15 00:02:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1394. [2019-10-15 00:02:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2019-10-15 00:02:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2125 transitions. [2019-10-15 00:02:45,462 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2125 transitions. Word has length 183 [2019-10-15 00:02:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:45,497 INFO L462 AbstractCegarLoop]: Abstraction has 1394 states and 2125 transitions. [2019-10-15 00:02:45,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2125 transitions. [2019-10-15 00:02:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-15 00:02:45,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:45,503 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, 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 00:02:45,504 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1893235657, now seen corresponding path program 1 times [2019-10-15 00:02:45,505 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:45,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002734487] [2019-10-15 00:02:45,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:45,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:45,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 124 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:45,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002734487] [2019-10-15 00:02:45,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789652020] [2019-10-15 00:02:45,717 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 00:02:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:45,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:02:45,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:02:45,963 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 124 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:46,144 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:02:46,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:02:46,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008845757] [2019-10-15 00:02:46,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:46,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:46,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:46,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:02:46,147 INFO L87 Difference]: Start difference. First operand 1394 states and 2125 transitions. Second operand 5 states. [2019-10-15 00:02:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:47,884 INFO L93 Difference]: Finished difference Result 3591 states and 5631 transitions. [2019-10-15 00:02:47,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:02:47,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-10-15 00:02:47,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:47,896 INFO L225 Difference]: With dead ends: 3591 [2019-10-15 00:02:47,897 INFO L226 Difference]: Without dead ends: 2203 [2019-10-15 00:02:47,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:02:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2019-10-15 00:02:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2190. [2019-10-15 00:02:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2190 states. [2019-10-15 00:02:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3206 transitions. [2019-10-15 00:02:47,978 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3206 transitions. Word has length 234 [2019-10-15 00:02:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:47,978 INFO L462 AbstractCegarLoop]: Abstraction has 2190 states and 3206 transitions. [2019-10-15 00:02:47,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3206 transitions. [2019-10-15 00:02:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-15 00:02:47,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:47,987 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, 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] [2019-10-15 00:02:48,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:48,193 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2140112339, now seen corresponding path program 1 times [2019-10-15 00:02:48,193 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:48,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605758362] [2019-10-15 00:02:48,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:48,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:48,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 124 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:48,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605758362] [2019-10-15 00:02:48,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495995137] [2019-10-15 00:02:48,401 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 00:02:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:48,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 00:02:48,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 00:02:48,644 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 00:02:48,703 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:02:48,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2019-10-15 00:02:48,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540153202] [2019-10-15 00:02:48,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:48,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:48,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:02:48,705 INFO L87 Difference]: Start difference. First operand 2190 states and 3206 transitions. Second operand 4 states. [2019-10-15 00:02:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:49,467 INFO L93 Difference]: Finished difference Result 4368 states and 6415 transitions. [2019-10-15 00:02:49,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:49,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 255 [2019-10-15 00:02:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:49,480 INFO L225 Difference]: With dead ends: 4368 [2019-10-15 00:02:49,480 INFO L226 Difference]: Without dead ends: 2184 [2019-10-15 00:02:49,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 507 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:02:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2019-10-15 00:02:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2184. [2019-10-15 00:02:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2019-10-15 00:02:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3188 transitions. [2019-10-15 00:02:49,550 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3188 transitions. Word has length 255 [2019-10-15 00:02:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:49,550 INFO L462 AbstractCegarLoop]: Abstraction has 2184 states and 3188 transitions. [2019-10-15 00:02:49,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3188 transitions. [2019-10-15 00:02:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-10-15 00:02:49,560 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:49,560 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:49,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:49,765 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1955526003, now seen corresponding path program 1 times [2019-10-15 00:02:49,767 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:49,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135674595] [2019-10-15 00:02:49,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:49,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:49,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 186 proven. 136 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-15 00:02:50,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135674595] [2019-10-15 00:02:50,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382879845] [2019-10-15 00:02:50,020 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 [2019-10-15 00:02:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:50,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:02:50,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-10-15 00:02:50,244 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 186 proven. 136 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-15 00:02:50,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:02:50,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:02:50,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726774603] [2019-10-15 00:02:50,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:50,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:50,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:02:50,440 INFO L87 Difference]: Start difference. First operand 2184 states and 3188 transitions. Second operand 5 states. [2019-10-15 00:02:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:51,960 INFO L93 Difference]: Finished difference Result 5788 states and 8780 transitions. [2019-10-15 00:02:51,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:51,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2019-10-15 00:02:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:51,995 INFO L225 Difference]: With dead ends: 5788 [2019-10-15 00:02:51,995 INFO L226 Difference]: Without dead ends: 3610 [2019-10-15 00:02:52,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 604 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:02:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2019-10-15 00:02:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3378. [2019-10-15 00:02:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3378 states. [2019-10-15 00:02:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 4918 transitions. [2019-10-15 00:02:52,100 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 4918 transitions. Word has length 304 [2019-10-15 00:02:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:52,100 INFO L462 AbstractCegarLoop]: Abstraction has 3378 states and 4918 transitions. [2019-10-15 00:02:52,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 4918 transitions. [2019-10-15 00:02:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-10-15 00:02:52,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:52,112 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:52,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:52,317 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1610214185, now seen corresponding path program 1 times [2019-10-15 00:02:52,318 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:52,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497734280] [2019-10-15 00:02:52,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:52,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:52,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 262 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-15 00:02:52,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497734280] [2019-10-15 00:02:52,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276326965] [2019-10-15 00:02:52,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:52,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:52,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:02:52,862 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 262 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-15 00:02:53,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1852671772] [2019-10-15 00:02:53,036 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 307 [2019-10-15 00:02:53,084 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:53,085 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)