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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:04:11,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:04:11,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:04:11,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:04:11,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:04:11,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:04:11,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:04:11,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:04:11,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:04:11,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:04:11,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:04:11,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:04:11,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:04:11,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:04:11,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:04:11,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:04:11,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:04:11,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:04:11,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:04:11,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:04:11,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:04:11,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:04:11,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:04:11,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:04:11,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:04:11,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:04:11,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:04:11,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:04:11,941 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 00:04:11,964 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:04:11,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:04:11,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:04:11,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:04:11,967 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:04:11,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:04:11,967 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:04:11,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:04:11,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:04:11,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:04:11,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:04:11,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:04:11,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:04:11,970 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:04:11,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:04:11,970 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:04:11,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:04:11,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:04:11,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:04:11,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:04:11,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:04:11,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:11,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:04:11,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:04:11,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:04:11,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:04:11,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:04:11,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:04:11,973 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 00:04:12,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:04:12,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:04:12,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:04:12,292 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:04:12,293 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:04:12,293 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54.c [2019-10-15 00:04:12,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d078a621d/0c6d431597184a4b82af440f4863ae9a/FLAGb293c3048 [2019-10-15 00:04:13,003 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:04:13,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54.c [2019-10-15 00:04:13,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d078a621d/0c6d431597184a4b82af440f4863ae9a/FLAGb293c3048 [2019-10-15 00:04:13,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d078a621d/0c6d431597184a4b82af440f4863ae9a [2019-10-15 00:04:13,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:04:13,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:04:13,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:13,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:04:13,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:04:13,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:13" (1/1) ... [2019-10-15 00:04:13,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2bbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:13, skipping insertion in model container [2019-10-15 00:04:13,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:13" (1/1) ... [2019-10-15 00:04:13,263 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:04:13,344 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:14,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:14,006 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:14,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:14,177 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:14,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14 WrapperNode [2019-10-15 00:04:14,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:14,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:14,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:14,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:14,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (1/1) ... [2019-10-15 00:04:14,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (1/1) ... [2019-10-15 00:04:14,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (1/1) ... [2019-10-15 00:04:14,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (1/1) ... [2019-10-15 00:04:14,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (1/1) ... [2019-10-15 00:04:14,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (1/1) ... [2019-10-15 00:04:14,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (1/1) ... [2019-10-15 00:04:14,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:14,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:14,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:14,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:14,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (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 00:04:14,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:14,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:14,411 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:14,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:16,170 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:16,170 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:16,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:16 BoogieIcfgContainer [2019-10-15 00:04:16,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:16,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:16,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:16,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:16,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:13" (1/3) ... [2019-10-15 00:04:16,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ad1b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:16, skipping insertion in model container [2019-10-15 00:04:16,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:14" (2/3) ... [2019-10-15 00:04:16,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ad1b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:16, skipping insertion in model container [2019-10-15 00:04:16,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:16" (3/3) ... [2019-10-15 00:04:16,183 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label54.c [2019-10-15 00:04:16,194 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:16,206 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:16,218 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:16,267 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:16,267 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:16,269 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:16,269 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:16,269 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:16,269 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:16,269 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:16,270 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:04:16,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 00:04:16,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:16,346 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] [2019-10-15 00:04:16,347 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1043442102, now seen corresponding path program 1 times [2019-10-15 00:04:16,368 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:16,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471329766] [2019-10-15 00:04:16,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:16,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:16,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:16,788 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 00:04:16,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471329766] [2019-10-15 00:04:16,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:16,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:16,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208838291] [2019-10-15 00:04:16,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:16,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:16,814 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:04:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:19,103 INFO L93 Difference]: Finished difference Result 994 states and 1776 transitions. [2019-10-15 00:04:19,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:19,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-15 00:04:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:19,127 INFO L225 Difference]: With dead ends: 994 [2019-10-15 00:04:19,127 INFO L226 Difference]: Without dead ends: 620 [2019-10-15 00:04:19,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-15 00:04:19,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 614. [2019-10-15 00:04:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 00:04:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 908 transitions. [2019-10-15 00:04:19,234 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 908 transitions. Word has length 43 [2019-10-15 00:04:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:19,234 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 908 transitions. [2019-10-15 00:04:19,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 908 transitions. [2019-10-15 00:04:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 00:04:19,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:19,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:04:19,242 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2051275321, now seen corresponding path program 1 times [2019-10-15 00:04:19,243 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:19,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198467570] [2019-10-15 00:04:19,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:19,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:19,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:19,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198467570] [2019-10-15 00:04:19,460 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:19,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:19,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241736678] [2019-10-15 00:04:19,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:19,467 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:19,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:19,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:19,467 INFO L87 Difference]: Start difference. First operand 614 states and 908 transitions. Second operand 4 states. [2019-10-15 00:04:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:21,320 INFO L93 Difference]: Finished difference Result 2367 states and 3579 transitions. [2019-10-15 00:04:21,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:21,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-15 00:04:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:21,333 INFO L225 Difference]: With dead ends: 2367 [2019-10-15 00:04:21,334 INFO L226 Difference]: Without dead ends: 1759 [2019-10-15 00:04:21,337 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 00:04:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2019-10-15 00:04:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1183. [2019-10-15 00:04:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2019-10-15 00:04:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1681 transitions. [2019-10-15 00:04:21,413 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1681 transitions. Word has length 116 [2019-10-15 00:04:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:21,426 INFO L462 AbstractCegarLoop]: Abstraction has 1183 states and 1681 transitions. [2019-10-15 00:04:21,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1681 transitions. [2019-10-15 00:04:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:04:21,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:21,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:04:21,440 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash -442913762, now seen corresponding path program 1 times [2019-10-15 00:04:21,441 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:21,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148790261] [2019-10-15 00:04:21,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:21,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:21,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:21,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148790261] [2019-10-15 00:04:21,699 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:21,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:21,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171864463] [2019-10-15 00:04:21,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:21,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:21,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:21,701 INFO L87 Difference]: Start difference. First operand 1183 states and 1681 transitions. Second operand 6 states. [2019-10-15 00:04:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:24,368 INFO L93 Difference]: Finished difference Result 3648 states and 5882 transitions. [2019-10-15 00:04:24,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 00:04:24,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-15 00:04:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:24,393 INFO L225 Difference]: With dead ends: 3648 [2019-10-15 00:04:24,393 INFO L226 Difference]: Without dead ends: 2471 [2019-10-15 00:04:24,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:04:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-10-15 00:04:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2397. [2019-10-15 00:04:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2019-10-15 00:04:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3442 transitions. [2019-10-15 00:04:24,511 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3442 transitions. Word has length 141 [2019-10-15 00:04:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:24,512 INFO L462 AbstractCegarLoop]: Abstraction has 2397 states and 3442 transitions. [2019-10-15 00:04:24,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3442 transitions. [2019-10-15 00:04:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-15 00:04:24,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:24,519 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:04:24,519 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:24,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1861817831, now seen corresponding path program 1 times [2019-10-15 00:04:24,520 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:24,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25485808] [2019-10-15 00:04:24,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:24,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:24,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:04:24,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25485808] [2019-10-15 00:04:24,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302824444] [2019-10-15 00:04:24,751 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 00:04:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:24,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:04:24,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 00:04:25,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:04:25,193 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:04:25,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:04:25,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58399995] [2019-10-15 00:04:25,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:04:25,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:25,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:04:25,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:04:25,196 INFO L87 Difference]: Start difference. First operand 2397 states and 3442 transitions. Second operand 5 states. [2019-10-15 00:04:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:26,857 INFO L93 Difference]: Finished difference Result 7053 states and 11357 transitions. [2019-10-15 00:04:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:26,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2019-10-15 00:04:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:26,903 INFO L225 Difference]: With dead ends: 7053 [2019-10-15 00:04:26,903 INFO L226 Difference]: Without dead ends: 4662 [2019-10-15 00:04:26,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:04:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2019-10-15 00:04:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4579. [2019-10-15 00:04:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4579 states. [2019-10-15 00:04:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6749 transitions. [2019-10-15 00:04:27,120 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6749 transitions. Word has length 204 [2019-10-15 00:04:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:27,121 INFO L462 AbstractCegarLoop]: Abstraction has 4579 states and 6749 transitions. [2019-10-15 00:04:27,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:04:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6749 transitions. [2019-10-15 00:04:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-15 00:04:27,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:27,131 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:27,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:27,336 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:27,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1031566485, now seen corresponding path program 1 times [2019-10-15 00:04:27,337 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:27,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958154462] [2019-10-15 00:04:27,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:27,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:27,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:27,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958154462] [2019-10-15 00:04:27,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882666293] [2019-10-15 00:04:27,543 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 00:04:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:27,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 00:04:27,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 00:04:27,734 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 00:04:27,774 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:04:27,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 00:04:27,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878217593] [2019-10-15 00:04:27,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:04:27,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:27,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:04:27,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:04:27,777 INFO L87 Difference]: Start difference. First operand 4579 states and 6749 transitions. Second operand 3 states. [2019-10-15 00:04:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:28,862 INFO L93 Difference]: Finished difference Result 10692 states and 16111 transitions. [2019-10-15 00:04:28,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:04:28,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2019-10-15 00:04:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:28,904 INFO L225 Difference]: With dead ends: 10692 [2019-10-15 00:04:28,904 INFO L226 Difference]: Without dead ends: 6307 [2019-10-15 00:04:28,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:04:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2019-10-15 00:04:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 6300. [2019-10-15 00:04:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2019-10-15 00:04:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 9168 transitions. [2019-10-15 00:04:29,144 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 9168 transitions. Word has length 218 [2019-10-15 00:04:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:29,145 INFO L462 AbstractCegarLoop]: Abstraction has 6300 states and 9168 transitions. [2019-10-15 00:04:29,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:04:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 9168 transitions. [2019-10-15 00:04:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-15 00:04:29,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:29,158 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:04:29,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:29,365 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1069896338, now seen corresponding path program 1 times [2019-10-15 00:04:29,366 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:29,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917840554] [2019-10-15 00:04:29,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:29,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:29,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 106 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:30,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917840554] [2019-10-15 00:04:30,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640989975] [2019-10-15 00:04:30,259 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 00:04:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:30,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:04:30,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:30,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 00:04:30,500 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:30,704 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-10-15 00:04:30,752 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:30,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:30,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:30,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:30,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:30,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:30,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:30,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:04:31,012 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:04:31,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 20 [2019-10-15 00:04:31,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5991301] [2019-10-15 00:04:31,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:04:31,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:04:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-10-15 00:04:31,016 INFO L87 Difference]: Start difference. First operand 6300 states and 9168 transitions. Second operand 5 states. [2019-10-15 00:04:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:32,650 INFO L93 Difference]: Finished difference Result 12461 states and 18339 transitions. [2019-10-15 00:04:32,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:04:32,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2019-10-15 00:04:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:32,688 INFO L225 Difference]: With dead ends: 12461 [2019-10-15 00:04:32,688 INFO L226 Difference]: Without dead ends: 6355 [2019-10-15 00:04:32,712 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2019-10-15 00:04:32,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6355 states. [2019-10-15 00:04:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6355 to 6340. [2019-10-15 00:04:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6340 states. [2019-10-15 00:04:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 9306 transitions. [2019-10-15 00:04:33,012 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 9306 transitions. Word has length 225 [2019-10-15 00:04:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:33,013 INFO L462 AbstractCegarLoop]: Abstraction has 6340 states and 9306 transitions. [2019-10-15 00:04:33,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:04:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 9306 transitions. [2019-10-15 00:04:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-10-15 00:04:33,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:33,022 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:33,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:33,228 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:33,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1349983275, now seen corresponding path program 1 times [2019-10-15 00:04:33,229 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:33,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032020178] [2019-10-15 00:04:33,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:33,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:33,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-15 00:04:33,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032020178] [2019-10-15 00:04:33,415 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:33,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:33,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226891985] [2019-10-15 00:04:33,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:33,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:33,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:33,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:33,418 INFO L87 Difference]: Start difference. First operand 6340 states and 9306 transitions. Second operand 4 states. [2019-10-15 00:04:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:35,545 INFO L93 Difference]: Finished difference Result 16152 states and 24692 transitions. [2019-10-15 00:04:35,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:35,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2019-10-15 00:04:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:35,631 INFO L225 Difference]: With dead ends: 16152 [2019-10-15 00:04:35,631 INFO L226 Difference]: Without dead ends: 10006 [2019-10-15 00:04:35,667 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 00:04:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states. [2019-10-15 00:04:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10006 to 9421. [2019-10-15 00:04:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9421 states. [2019-10-15 00:04:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9421 states to 9421 states and 13722 transitions. [2019-10-15 00:04:36,150 INFO L78 Accepts]: Start accepts. Automaton has 9421 states and 13722 transitions. Word has length 260 [2019-10-15 00:04:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:36,151 INFO L462 AbstractCegarLoop]: Abstraction has 9421 states and 13722 transitions. [2019-10-15 00:04:36,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 9421 states and 13722 transitions. [2019-10-15 00:04:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-10-15 00:04:36,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:36,160 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:04:36,161 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash -706378899, now seen corresponding path program 1 times [2019-10-15 00:04:36,161 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:36,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848053187] [2019-10-15 00:04:36,162 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:36,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:36,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-15 00:04:36,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848053187] [2019-10-15 00:04:36,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621350030] [2019-10-15 00:04:36,469 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 00:04:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:36,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:04:36,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:36,702 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:36,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [43085656] [2019-10-15 00:04:36,947 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 270 [2019-10-15 00:04:37,005 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:04:37,006 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)