java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:00:27,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:00:27,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:00:27,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:00:27,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:00:27,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:00:27,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:00:27,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:00:27,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:00:27,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:00:27,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:00:27,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:00:27,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:00:27,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:00:27,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:00:27,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:00:27,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:00:27,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:00:27,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:00:27,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:00:27,364 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 00:00:27,391 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:00:27,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:00:27,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:00:27,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:00:27,393 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:00:27,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:00:27,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:00:27,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:00:27,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:00:27,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:00:27,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:00:27,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:00:27,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:00:27,395 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:00:27,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:00:27,395 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:00:27,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:00:27,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:00:27,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:00:27,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:00:27,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:00:27,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:27,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:00:27,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:00:27,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:00:27,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:00:27,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:00:27,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:00:27,398 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 00:00:27,683 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:00:27,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:00:27,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:00:27,711 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:00:27,711 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:00:27,712 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label00.c [2019-10-15 00:00:27,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3febd4c22/5af747af7ee6402d87d339d1336db64e/FLAGf0f25f4de [2019-10-15 00:00:28,353 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:00:28,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label00.c [2019-10-15 00:00:28,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3febd4c22/5af747af7ee6402d87d339d1336db64e/FLAGf0f25f4de [2019-10-15 00:00:28,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3febd4c22/5af747af7ee6402d87d339d1336db64e [2019-10-15 00:00:28,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:00:28,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:00:28,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:28,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:00:28,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:00:28,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:28" (1/1) ... [2019-10-15 00:00:28,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfc3857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:28, skipping insertion in model container [2019-10-15 00:00:28,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:28" (1/1) ... [2019-10-15 00:00:28,656 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:00:28,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:00:29,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:29,393 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:00:29,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:29,522 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:00:29,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29 WrapperNode [2019-10-15 00:00:29,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:29,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:00:29,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:00:29,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:00:29,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (1/1) ... [2019-10-15 00:00:29,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (1/1) ... [2019-10-15 00:00:29,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (1/1) ... [2019-10-15 00:00:29,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (1/1) ... [2019-10-15 00:00:29,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (1/1) ... [2019-10-15 00:00:29,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (1/1) ... [2019-10-15 00:00:29,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (1/1) ... [2019-10-15 00:00:29,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:00:29,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:00:29,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:00:29,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:00:29,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (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 00:00:29,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:00:29,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:00:29,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:00:29,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:00:29,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:00:29,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:00:31,070 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:00:31,071 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:00:31,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:31 BoogieIcfgContainer [2019-10-15 00:00:31,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:00:31,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:00:31,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:00:31,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:00:31,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:28" (1/3) ... [2019-10-15 00:00:31,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dec8478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:31, skipping insertion in model container [2019-10-15 00:00:31,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:29" (2/3) ... [2019-10-15 00:00:31,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dec8478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:31, skipping insertion in model container [2019-10-15 00:00:31,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:31" (3/3) ... [2019-10-15 00:00:31,089 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label00.c [2019-10-15 00:00:31,103 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:00:31,115 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:00:31,127 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:00:31,157 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:00:31,158 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:00:31,158 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:00:31,158 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:00:31,158 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:00:31,158 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:00:31,159 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:00:31,159 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:00:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:00:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-15 00:00:31,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:31,209 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] [2019-10-15 00:00:31,211 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:31,217 INFO L82 PathProgramCache]: Analyzing trace with hash 446326894, now seen corresponding path program 1 times [2019-10-15 00:00:31,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:31,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252538694] [2019-10-15 00:00:31,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:31,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:31,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:31,594 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 00:00:31,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252538694] [2019-10-15 00:00:31,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:31,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:00:31,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021419157] [2019-10-15 00:00:31,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:00:31,603 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:00:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:00:31,621 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:00:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:32,637 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:00:32,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:00:32,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-10-15 00:00:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:32,655 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:00:32,656 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:00:32,665 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 00:00:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:00:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:00:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:00:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:00:32,740 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 53 [2019-10-15 00:00:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:32,741 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:00:32,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:00:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:00:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-15 00:00:32,750 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:32,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:32,750 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:32,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1014912959, now seen corresponding path program 1 times [2019-10-15 00:00:32,751 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:32,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657112952] [2019-10-15 00:00:32,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:32,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:32,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:33,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657112952] [2019-10-15 00:00:33,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:33,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:00:33,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638987249] [2019-10-15 00:00:33,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:00:33,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:00:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:00:33,035 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-10-15 00:00:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:34,452 INFO L93 Difference]: Finished difference Result 1154 states and 1790 transitions. [2019-10-15 00:00:34,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:00:34,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-15 00:00:34,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:34,461 INFO L225 Difference]: With dead ends: 1154 [2019-10-15 00:00:34,461 INFO L226 Difference]: Without dead ends: 866 [2019-10-15 00:00:34,463 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:00:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-10-15 00:00:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 723. [2019-10-15 00:00:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2019-10-15 00:00:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1036 transitions. [2019-10-15 00:00:34,511 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1036 transitions. Word has length 172 [2019-10-15 00:00:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:34,512 INFO L462 AbstractCegarLoop]: Abstraction has 723 states and 1036 transitions. [2019-10-15 00:00:34,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:00:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1036 transitions. [2019-10-15 00:00:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 00:00:34,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:34,519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:34,519 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1103795558, now seen corresponding path program 1 times [2019-10-15 00:00:34,520 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:34,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146753208] [2019-10-15 00:00:34,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:34,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:34,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:34,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146753208] [2019-10-15 00:00:34,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:34,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:00:34,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553291013] [2019-10-15 00:00:34,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:00:34,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:34,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:00:34,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:00:34,864 INFO L87 Difference]: Start difference. First operand 723 states and 1036 transitions. Second operand 6 states. [2019-10-15 00:00:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:35,829 INFO L93 Difference]: Finished difference Result 1613 states and 2361 transitions. [2019-10-15 00:00:35,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:00:35,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2019-10-15 00:00:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:35,838 INFO L225 Difference]: With dead ends: 1613 [2019-10-15 00:00:35,838 INFO L226 Difference]: Without dead ends: 896 [2019-10-15 00:00:35,840 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:00:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-10-15 00:00:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 880. [2019-10-15 00:00:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-15 00:00:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1167 transitions. [2019-10-15 00:00:35,880 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1167 transitions. Word has length 179 [2019-10-15 00:00:35,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:35,881 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1167 transitions. [2019-10-15 00:00:35,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:00:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1167 transitions. [2019-10-15 00:00:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-10-15 00:00:35,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:35,888 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, 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] [2019-10-15 00:00:35,888 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash -630428119, now seen corresponding path program 1 times [2019-10-15 00:00:35,889 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:35,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496167291] [2019-10-15 00:00:35,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:35,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:35,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 92 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:00:36,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496167291] [2019-10-15 00:00:36,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602604233] [2019-10-15 00:00:36,151 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 00:00:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:36,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:00:36,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:00:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 00:00:36,485 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:00:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 92 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:00:36,641 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:00:36,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-15 00:00:36,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417629718] [2019-10-15 00:00:36,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:00:36,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:36,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:00:36,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:00:36,644 INFO L87 Difference]: Start difference. First operand 880 states and 1167 transitions. Second operand 5 states. [2019-10-15 00:00:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:37,579 INFO L93 Difference]: Finished difference Result 2382 states and 3298 transitions. [2019-10-15 00:00:37,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:00:37,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2019-10-15 00:00:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:37,590 INFO L225 Difference]: With dead ends: 2382 [2019-10-15 00:00:37,590 INFO L226 Difference]: Without dead ends: 1508 [2019-10-15 00:00:37,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:00:37,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2019-10-15 00:00:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1337. [2019-10-15 00:00:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1337 states. [2019-10-15 00:00:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1777 transitions. [2019-10-15 00:00:37,662 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1777 transitions. Word has length 248 [2019-10-15 00:00:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:37,664 INFO L462 AbstractCegarLoop]: Abstraction has 1337 states and 1777 transitions. [2019-10-15 00:00:37,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:00:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1777 transitions. [2019-10-15 00:00:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-10-15 00:00:37,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:37,672 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:00:37,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:00:37,877 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash 144192093, now seen corresponding path program 1 times [2019-10-15 00:00:37,878 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:37,879 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922917635] [2019-10-15 00:00:37,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:37,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:37,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:38,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922917635] [2019-10-15 00:00:38,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246574834] [2019-10-15 00:00:38,097 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 00:00:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:38,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:00:38,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:00:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:38,356 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:00:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:38,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [41344389] [2019-10-15 00:00:38,527 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 259 [2019-10-15 00:00:38,586 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:00:38,586 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:00:50,681 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.