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/Problem16_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:42,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:42,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:42,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:08:42,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:42,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:42,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:42,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:42,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:42,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:42,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:42,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:42,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:42,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:42,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:42,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:42,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:42,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:42,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:42,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:42,970 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 00:08:43,002 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:43,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:43,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:43,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:43,007 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:43,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:43,008 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:43,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:43,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:43,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:43,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:43,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:43,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:43,009 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:43,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:43,012 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:43,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:43,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:43,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:43,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:43,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:43,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:43,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:43,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:43,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:43,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:43,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:43,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:43,014 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 00:08:43,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:43,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:43,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:43,356 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:43,356 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:43,357 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-10-15 00:08:43,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b63dece3/f57c5308f33f4313ad9b64a991b4bcbc/FLAG2e3220a8e [2019-10-15 00:08:44,051 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:44,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-10-15 00:08:44,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b63dece3/f57c5308f33f4313ad9b64a991b4bcbc/FLAG2e3220a8e [2019-10-15 00:08:44,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b63dece3/f57c5308f33f4313ad9b64a991b4bcbc [2019-10-15 00:08:44,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:44,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:44,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:44,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:44,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:44,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:44" (1/1) ... [2019-10-15 00:08:44,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:44, skipping insertion in model container [2019-10-15 00:08:44,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:44" (1/1) ... [2019-10-15 00:08:44,302 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:44,383 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:45,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:45,142 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:45,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:45,499 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:45,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45 WrapperNode [2019-10-15 00:08:45,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:45,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:45,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:45,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:45,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (1/1) ... [2019-10-15 00:08:45,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (1/1) ... [2019-10-15 00:08:45,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (1/1) ... [2019-10-15 00:08:45,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (1/1) ... [2019-10-15 00:08:45,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (1/1) ... [2019-10-15 00:08:45,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (1/1) ... [2019-10-15 00:08:45,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (1/1) ... [2019-10-15 00:08:45,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:45,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:45,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:45,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:45,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (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 00:08:45,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:45,789 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:48,104 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:48,105 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:48,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:48 BoogieIcfgContainer [2019-10-15 00:08:48,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:48,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:48,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:48,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:48,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:44" (1/3) ... [2019-10-15 00:08:48,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310511cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:48, skipping insertion in model container [2019-10-15 00:08:48,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:45" (2/3) ... [2019-10-15 00:08:48,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310511cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:48, skipping insertion in model container [2019-10-15 00:08:48,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:48" (3/3) ... [2019-10-15 00:08:48,118 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label29.c [2019-10-15 00:08:48,129 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:48,141 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:48,152 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:48,191 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:48,191 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:48,192 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:48,192 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:48,192 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:48,192 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:48,192 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:48,192 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-15 00:08:48,227 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:48,228 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] [2019-10-15 00:08:48,229 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:48,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1301398987, now seen corresponding path program 1 times [2019-10-15 00:08:48,240 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:48,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510610744] [2019-10-15 00:08:48,241 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:48,241 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:48,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:48,611 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 00:08:48,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510610744] [2019-10-15 00:08:48,612 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:48,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:08:48,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511307959] [2019-10-15 00:08:48,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:08:48,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:48,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:08:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:08:48,637 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:08:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:51,163 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:08:51,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:08:51,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-10-15 00:08:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:51,187 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:08:51,187 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:08:51,198 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 00:08:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:08:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:08:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:08:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-10-15 00:08:51,301 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 52 [2019-10-15 00:08:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:51,302 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-10-15 00:08:51,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:08:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-10-15 00:08:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-15 00:08:51,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:51,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:51,309 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash -740813347, now seen corresponding path program 1 times [2019-10-15 00:08:51,310 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:51,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320580169] [2019-10-15 00:08:51,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:51,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:51,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:51,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320580169] [2019-10-15 00:08:51,599 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:51,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:51,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587293253] [2019-10-15 00:08:51,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:51,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:51,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:51,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:51,603 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-10-15 00:08:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:54,344 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-10-15 00:08:54,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:54,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-15 00:08:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:54,354 INFO L225 Difference]: With dead ends: 1733 [2019-10-15 00:08:54,354 INFO L226 Difference]: Without dead ends: 1057 [2019-10-15 00:08:54,357 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 00:08:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-10-15 00:08:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-10-15 00:08:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-15 00:08:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-10-15 00:08:54,436 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 159 [2019-10-15 00:08:54,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:54,437 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-10-15 00:08:54,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-10-15 00:08:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 00:08:54,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:54,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:54,441 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1072071420, now seen corresponding path program 1 times [2019-10-15 00:08:54,442 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:54,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376901047] [2019-10-15 00:08:54,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:54,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:54,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:54,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376901047] [2019-10-15 00:08:54,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:54,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:54,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145347693] [2019-10-15 00:08:54,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:54,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:54,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:54,693 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-10-15 00:08:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:57,574 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-10-15 00:08:57,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:57,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-10-15 00:08:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:57,589 INFO L225 Difference]: With dead ends: 3130 [2019-10-15 00:08:57,589 INFO L226 Difference]: Without dead ends: 2097 [2019-10-15 00:08:57,593 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 00:08:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-10-15 00:08:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-10-15 00:08:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-15 00:08:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-10-15 00:08:57,658 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 162 [2019-10-15 00:08:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:57,659 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-10-15 00:08:57,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-10-15 00:08:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2019-10-15 00:08:57,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:57,664 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:57,665 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1495259620, now seen corresponding path program 1 times [2019-10-15 00:08:57,665 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:57,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578073799] [2019-10-15 00:08:57,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:57,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:57,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 90 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:08:57,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578073799] [2019-10-15 00:08:57,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919422158] [2019-10-15 00:08:57,931 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 00:08:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:58,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:08:58,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 00:08:58,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 90 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:08:58,479 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:08:58,479 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:08:58,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870775594] [2019-10-15 00:08:58,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:08:58,484 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:58,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:08:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:08:58,485 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-10-15 00:09:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:01,702 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-10-15 00:09:01,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:01,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 277 [2019-10-15 00:09:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:01,728 INFO L225 Difference]: With dead ends: 6247 [2019-10-15 00:09:01,728 INFO L226 Difference]: Without dead ends: 4172 [2019-10-15 00:09:01,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-10-15 00:09:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-10-15 00:09:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-10-15 00:09:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-10-15 00:09:01,834 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 277 [2019-10-15 00:09:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:01,835 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-10-15 00:09:01,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-10-15 00:09:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2019-10-15 00:09:01,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:01,847 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:02,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:02,053 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1133470175, now seen corresponding path program 1 times [2019-10-15 00:09:02,055 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:02,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933985151] [2019-10-15 00:09:02,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:02,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:02,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 140 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 00:09:02,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933985151] [2019-10-15 00:09:02,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087299903] [2019-10-15 00:09:02,462 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 00:09:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:02,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:02,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 402 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 00:09:02,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 237 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-15 00:09:03,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [13979735] [2019-10-15 00:09:03,133 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 486 [2019-10-15 00:09:03,197 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:03,198 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:18,247 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:09:18,249 INFO L272 AbstractInterpreter]: Visited 224 different actions 224 times. Never merged. Never widened. Performed 422 root evaluator evaluations with a maximum evaluation depth of 14. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:09:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:18,253 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates