java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:00:55,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:00:55,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:00:55,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:00:55,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:00:55,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:00:55,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:00:55,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:00:55,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:00:55,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:00:55,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:00:55,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:00:55,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:00:55,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:00:55,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:00:55,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:00:55,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:00:55,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:00:55,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:00:55,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:00:55,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:00:55,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:00:55,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:00:55,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:00:55,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:00:55,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:00:55,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:00:55,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:00:55,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:00:55,265 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:00:55,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:00:55,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:00:55,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:00:55,267 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:00:55,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:00:55,267 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:00:55,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:00:55,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:00:55,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:00:55,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:00:55,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:00:55,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:00:55,268 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:00:55,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:00:55,269 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:00:55,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:00:55,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:00:55,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:00:55,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:00:55,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:00:55,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:55,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:00:55,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:00:55,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:00:55,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:00:55,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:00:55,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:00:55,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:00:55,559 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:00:55,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:00:55,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:00:55,578 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:00:55,578 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:00:55,579 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label19.c [2019-10-15 00:00:55,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a4710d5e/675ae7fa9b824baf868105358a86ed8b/FLAG5e9039e0c [2019-10-15 00:00:56,202 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:00:56,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label19.c [2019-10-15 00:00:56,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a4710d5e/675ae7fa9b824baf868105358a86ed8b/FLAG5e9039e0c [2019-10-15 00:00:56,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a4710d5e/675ae7fa9b824baf868105358a86ed8b [2019-10-15 00:00:56,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:00:56,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:00:56,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:56,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:00:56,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:00:56,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:56" (1/1) ... [2019-10-15 00:00:56,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23408920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:56, skipping insertion in model container [2019-10-15 00:00:56,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:56" (1/1) ... [2019-10-15 00:00:56,534 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:00:56,603 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:00:57,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:57,149 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:00:57,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:57,258 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:00:57,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57 WrapperNode [2019-10-15 00:00:57,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:57,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:00:57,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:00:57,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:00:57,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:00:57,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:00:57,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:00:57,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:00:57,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:57,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:00:57,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:00:57,439 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:00:57,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:00:57,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:00:57,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:00:57,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:00:57,439 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:00:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:00:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:00:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:00:58,783 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:00:58,783 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:00:58,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:58 BoogieIcfgContainer [2019-10-15 00:00:58,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:00:58,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:00:58,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:00:58,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:00:58,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:56" (1/3) ... [2019-10-15 00:00:58,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560ddcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:58, skipping insertion in model container [2019-10-15 00:00:58,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57" (2/3) ... [2019-10-15 00:00:58,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560ddcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:58, skipping insertion in model container [2019-10-15 00:00:58,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:58" (3/3) ... [2019-10-15 00:00:58,794 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label19.c [2019-10-15 00:00:58,804 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:00:58,813 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:00:58,823 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:00:58,851 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:00:58,851 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:00:58,852 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:00:58,852 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:00:58,852 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:00:58,852 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:00:58,852 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:00:58,853 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:00:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:00:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-15 00:00:58,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:58,887 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] [2019-10-15 00:00:58,890 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:58,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1418549242, now seen corresponding path program 1 times [2019-10-15 00:00:58,906 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:58,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456047759] [2019-10-15 00:00:58,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:58,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:58,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:59,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456047759] [2019-10-15 00:00:59,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:59,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:00:59,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700239023] [2019-10-15 00:00:59,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:00:59,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:59,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:00:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:00:59,229 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:01:00,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:00,261 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:01:00,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:01:00,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2019-10-15 00:01:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:00,295 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:01:00,295 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:01:00,307 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 00:01:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:01:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:01:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:01:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:01:00,436 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 35 [2019-10-15 00:01:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:00,438 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:01:00,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:01:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:01:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 00:01:00,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:00,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:00,453 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash -969660742, now seen corresponding path program 1 times [2019-10-15 00:01:00,454 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:00,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437001213] [2019-10-15 00:01:00,455 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:00,455 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:00,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:00,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437001213] [2019-10-15 00:01:00,742 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:00,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:01:00,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131657402] [2019-10-15 00:01:00,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:01:00,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:00,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:01:00,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:01:00,747 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-15 00:01:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:01,779 INFO L93 Difference]: Finished difference Result 888 states and 1367 transitions. [2019-10-15 00:01:01,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:01:01,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2019-10-15 00:01:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:01,787 INFO L225 Difference]: With dead ends: 888 [2019-10-15 00:01:01,787 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 00:01:01,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:01:01,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 00:01:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 592. [2019-10-15 00:01:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-15 00:01:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 867 transitions. [2019-10-15 00:01:01,823 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 867 transitions. Word has length 117 [2019-10-15 00:01:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:01,824 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 867 transitions. [2019-10-15 00:01:01,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 867 transitions. [2019-10-15 00:01:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 00:01:01,828 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:01,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:01,829 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash 444366298, now seen corresponding path program 1 times [2019-10-15 00:01:01,829 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:01,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388809562] [2019-10-15 00:01:01,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:01,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:01,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:01,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388809562] [2019-10-15 00:01:01,996 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:01,996 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:01,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491289269] [2019-10-15 00:01:01,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:01,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:01,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:01,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:01,998 INFO L87 Difference]: Start difference. First operand 592 states and 867 transitions. Second operand 6 states. [2019-10-15 00:01:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:02,982 INFO L93 Difference]: Finished difference Result 1490 states and 2245 transitions. [2019-10-15 00:01:02,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:02,984 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-10-15 00:01:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:02,991 INFO L225 Difference]: With dead ends: 1490 [2019-10-15 00:01:02,991 INFO L226 Difference]: Without dead ends: 904 [2019-10-15 00:01:02,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 00:01:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-10-15 00:01:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 890. [2019-10-15 00:01:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-15 00:01:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1300 transitions. [2019-10-15 00:01:03,032 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1300 transitions. Word has length 133 [2019-10-15 00:01:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:03,033 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1300 transitions. [2019-10-15 00:01:03,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1300 transitions. [2019-10-15 00:01:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 00:01:03,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:03,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:03,039 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash -782876534, now seen corresponding path program 1 times [2019-10-15 00:01:03,040 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:03,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122376413] [2019-10-15 00:01:03,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:03,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:03,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:03,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122376413] [2019-10-15 00:01:03,300 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:03,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:03,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298243998] [2019-10-15 00:01:03,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:03,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:03,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:03,302 INFO L87 Difference]: Start difference. First operand 890 states and 1300 transitions. Second operand 6 states. [2019-10-15 00:01:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:04,256 INFO L93 Difference]: Finished difference Result 2104 states and 3183 transitions. [2019-10-15 00:01:04,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:04,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-10-15 00:01:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:04,267 INFO L225 Difference]: With dead ends: 2104 [2019-10-15 00:01:04,267 INFO L226 Difference]: Without dead ends: 1220 [2019-10-15 00:01:04,270 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 00:01:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2019-10-15 00:01:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1192. [2019-10-15 00:01:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-15 00:01:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1616 transitions. [2019-10-15 00:01:04,315 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1616 transitions. Word has length 157 [2019-10-15 00:01:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:04,316 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1616 transitions. [2019-10-15 00:01:04,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1616 transitions. [2019-10-15 00:01:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-15 00:01:04,320 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:04,321 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:01:04,321 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash -61791075, now seen corresponding path program 1 times [2019-10-15 00:01:04,322 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:04,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842051220] [2019-10-15 00:01:04,322 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:04,322 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:04,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:04,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842051220] [2019-10-15 00:01:04,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463068726] [2019-10-15 00:01:04,899 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 00:01:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:05,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:05,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:05,232 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:05,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [96142942] [2019-10-15 00:01:05,468 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 197 [2019-10-15 00:01:05,545 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:05,545 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:01:17,380 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 00:01:32,659 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:01:32,661 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 16. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:01:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:32,666 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates