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_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:07,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:07,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:07,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:07,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:07,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:07,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:07,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:07,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:07,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:07,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:07,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:07,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:07,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:07,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:07,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:07,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:07,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:07,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:07,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:07,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:07,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:07,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:07,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:07,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:07,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:07,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:07,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:07,738 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 00:09:07,758 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:07,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:07,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:07,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:07,760 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:07,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:07,761 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:07,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:07,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:07,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:07,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:07,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:07,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:07,763 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:07,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:07,764 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:07,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:07,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:07,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:07,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:07,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:07,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:07,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:07,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:07,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:07,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:07,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:07,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:07,767 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 00:09:08,050 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:08,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:08,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:08,067 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:08,068 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:08,068 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-10-15 00:09:08,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e704263f7/5e2f792d74f64be7a825a2fb4b3b5dbd/FLAG5e7d9125f [2019-10-15 00:09:08,748 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:08,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-10-15 00:09:08,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e704263f7/5e2f792d74f64be7a825a2fb4b3b5dbd/FLAG5e7d9125f [2019-10-15 00:09:08,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e704263f7/5e2f792d74f64be7a825a2fb4b3b5dbd [2019-10-15 00:09:08,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:08,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:08,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:08,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:08,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:08,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:08" (1/1) ... [2019-10-15 00:09:08,994 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 12:09:08, skipping insertion in model container [2019-10-15 00:09:08,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:08" (1/1) ... [2019-10-15 00:09:09,003 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:09,072 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:10,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:10,043 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:10,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:10,377 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:10,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10 WrapperNode [2019-10-15 00:09:10,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:10,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:10,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:10,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:10,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (1/1) ... [2019-10-15 00:09:10,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (1/1) ... [2019-10-15 00:09:10,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (1/1) ... [2019-10-15 00:09:10,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (1/1) ... [2019-10-15 00:09:10,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (1/1) ... [2019-10-15 00:09:10,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (1/1) ... [2019-10-15 00:09:10,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (1/1) ... [2019-10-15 00:09:10,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:10,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:10,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:10,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:10,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (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 00:09:10,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:10,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:10,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:10,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:10,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:10,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:10,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:10,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:13,074 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:13,074 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:13,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:13 BoogieIcfgContainer [2019-10-15 00:09:13,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:13,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:13,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:13,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:13,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:08" (1/3) ... [2019-10-15 00:09:13,092 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 12:09:13, skipping insertion in model container [2019-10-15 00:09:13,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:10" (2/3) ... [2019-10-15 00:09:13,092 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 12:09:13, skipping insertion in model container [2019-10-15 00:09:13,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:13" (3/3) ... [2019-10-15 00:09:13,095 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label48.c [2019-10-15 00:09:13,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:13,119 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:13,132 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:13,176 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:13,176 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:13,176 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:13,176 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:13,177 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:13,177 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:13,177 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:13,177 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-15 00:09:13,230 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:13,231 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:13,234 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash -241070563, now seen corresponding path program 1 times [2019-10-15 00:09:13,251 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:13,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510610744] [2019-10-15 00:09:13,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:13,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:13,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:13,703 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 00:09:13,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510610744] [2019-10-15 00:09:13,706 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:13,706 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:13,707 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409388596] [2019-10-15 00:09:13,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:13,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:13,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:13,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:13,734 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:09:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:16,313 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:09:16,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:16,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2019-10-15 00:09:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:16,339 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:09:16,340 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:09:16,351 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 00:09:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:09:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:09:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:09:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-15 00:09:16,487 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 70 [2019-10-15 00:09:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:16,488 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-15 00:09:16,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-15 00:09:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:09:16,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:16,500 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:16,500 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:16,500 INFO L82 PathProgramCache]: Analyzing trace with hash -712380051, now seen corresponding path program 1 times [2019-10-15 00:09:16,501 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:16,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33605134] [2019-10-15 00:09:16,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:16,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:16,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:16,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33605134] [2019-10-15 00:09:16,669 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:16,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:09:16,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960634652] [2019-10-15 00:09:16,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:16,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:16,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:16,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:09:16,673 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-10-15 00:09:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:19,287 INFO L93 Difference]: Finished difference Result 2061 states and 3602 transitions. [2019-10-15 00:09:19,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:19,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-15 00:09:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:19,298 INFO L225 Difference]: With dead ends: 2061 [2019-10-15 00:09:19,298 INFO L226 Difference]: Without dead ends: 1385 [2019-10-15 00:09:19,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 00:09:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2019-10-15 00:09:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1377. [2019-10-15 00:09:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1377 states. [2019-10-15 00:09:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 2120 transitions. [2019-10-15 00:09:19,360 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 2120 transitions. Word has length 141 [2019-10-15 00:09:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:19,361 INFO L462 AbstractCegarLoop]: Abstraction has 1377 states and 2120 transitions. [2019-10-15 00:09:19,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 2120 transitions. [2019-10-15 00:09:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 00:09:19,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:19,366 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 00:09:19,366 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:19,367 INFO L82 PathProgramCache]: Analyzing trace with hash -258818048, now seen corresponding path program 1 times [2019-10-15 00:09:19,367 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:19,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830478990] [2019-10-15 00:09:19,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:19,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:19,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:09:19,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830478990] [2019-10-15 00:09:19,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905253052] [2019-10-15 00:09:19,572 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 00:09:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:19,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:19,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:19,764 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:19,838 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:09:19,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 00:09:19,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774217529] [2019-10-15 00:09:19,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:19,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:19,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:19,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:09:19,840 INFO L87 Difference]: Start difference. First operand 1377 states and 2120 transitions. Second operand 3 states. [2019-10-15 00:09:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:21,394 INFO L93 Difference]: Finished difference Result 2060 states and 3048 transitions. [2019-10-15 00:09:21,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:21,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2019-10-15 00:09:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:21,408 INFO L225 Difference]: With dead ends: 2060 [2019-10-15 00:09:21,409 INFO L226 Difference]: Without dead ends: 2058 [2019-10-15 00:09:21,411 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:09:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2019-10-15 00:09:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1716. [2019-10-15 00:09:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-10-15 00:09:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2585 transitions. [2019-10-15 00:09:21,479 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2585 transitions. Word has length 170 [2019-10-15 00:09:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:21,480 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 2585 transitions. [2019-10-15 00:09:21,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2585 transitions. [2019-10-15 00:09:21,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-15 00:09:21,484 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:21,484 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:21,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:21,691 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:21,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1823635541, now seen corresponding path program 1 times [2019-10-15 00:09:21,692 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:21,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239670446] [2019-10-15 00:09:21,692 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:21,692 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:21,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:21,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239670446] [2019-10-15 00:09:21,954 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:21,954 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:21,954 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811140854] [2019-10-15 00:09:21,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:21,955 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:21,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:21,957 INFO L87 Difference]: Start difference. First operand 1716 states and 2585 transitions. Second operand 6 states. [2019-10-15 00:09:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:26,635 INFO L93 Difference]: Finished difference Result 4144 states and 6180 transitions. [2019-10-15 00:09:26,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:26,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 185 [2019-10-15 00:09:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:26,649 INFO L225 Difference]: With dead ends: 4144 [2019-10-15 00:09:26,649 INFO L226 Difference]: Without dead ends: 2434 [2019-10-15 00:09:26,653 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 00:09:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2019-10-15 00:09:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2409. [2019-10-15 00:09:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2409 states. [2019-10-15 00:09:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3217 transitions. [2019-10-15 00:09:26,719 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3217 transitions. Word has length 185 [2019-10-15 00:09:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:26,720 INFO L462 AbstractCegarLoop]: Abstraction has 2409 states and 3217 transitions. [2019-10-15 00:09:26,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3217 transitions. [2019-10-15 00:09:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-10-15 00:09:26,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:26,727 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 00:09:26,727 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1855237991, now seen corresponding path program 1 times [2019-10-15 00:09:26,728 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:26,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168168417] [2019-10-15 00:09:26,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:26,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:26,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:27,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168168417] [2019-10-15 00:09:27,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398715553] [2019-10-15 00:09:27,075 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 00:09:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:27,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:27,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:27,387 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:27,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1566875878] [2019-10-15 00:09:27,591 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 315 [2019-10-15 00:09:27,653 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:27,654 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:35,256 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:09:35,258 INFO L272 AbstractInterpreter]: Visited 134 different actions 134 times. Never merged. Never widened. Performed 305 root evaluator evaluations with a maximum evaluation depth of 14. Performed 305 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:09:35,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:35,263 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:09:43,978 INFO L227 lantSequenceWeakener]: Weakened 295 states. On average, predicates are now at 78.17% of their original sizes. [2019-10-15 00:09:43,978 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:09:44,098 INFO L553 sIntCurrentIteration]: We unified 313 AI predicates to 313 [2019-10-15 00:09:44,098 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:09:44,099 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:09:44,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 00:09:44,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548460765] [2019-10-15 00:09:44,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 00:09:44,102 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:44,102 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:09:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 00:09:44,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:09:44,103 INFO L87 Difference]: Start difference. First operand 2409 states and 3217 transitions. Second operand 12 states.