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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:00,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:00,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:00,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:00,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:00,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:00,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:00,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:00,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:00,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:00,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:00,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:00,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:00,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:00,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:00,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:00,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:00,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:00,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:00,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:00,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:00,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:00,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:00,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:00,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:00,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:00,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:00,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:00,067 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 00:09:00,081 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:00,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:00,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:00,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:00,083 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:00,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:00,083 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:00,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:00,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:00,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:00,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:00,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:00,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:00,084 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:00,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:00,085 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:00,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:00,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:00,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:00,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:00,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:00,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:00,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:00,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:00,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:00,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:00,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:00,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:00,087 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 00:09:00,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:00,386 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:00,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:00,391 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:00,391 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:00,392 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label42.c [2019-10-15 00:09:00,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04cd67230/55f534d84ed24914aec6cee89e4f8d36/FLAG40af9e63a [2019-10-15 00:09:01,076 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:01,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label42.c [2019-10-15 00:09:01,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04cd67230/55f534d84ed24914aec6cee89e4f8d36/FLAG40af9e63a [2019-10-15 00:09:01,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04cd67230/55f534d84ed24914aec6cee89e4f8d36 [2019-10-15 00:09:01,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:01,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:01,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:01,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:01,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:01,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:01" (1/1) ... [2019-10-15 00:09:01,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfc0887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:01, skipping insertion in model container [2019-10-15 00:09:01,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:01" (1/1) ... [2019-10-15 00:09:01,321 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:01,396 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:02,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:02,443 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:02,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:02,718 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:02,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02 WrapperNode [2019-10-15 00:09:02,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:02,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:02,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:02,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:02,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (1/1) ... [2019-10-15 00:09:02,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (1/1) ... [2019-10-15 00:09:02,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (1/1) ... [2019-10-15 00:09:02,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (1/1) ... [2019-10-15 00:09:02,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (1/1) ... [2019-10-15 00:09:02,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (1/1) ... [2019-10-15 00:09:02,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (1/1) ... [2019-10-15 00:09:02,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:02,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:02,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:02,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:02,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (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 00:09:02,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:02,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:02,977 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:02,977 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:02,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:02,978 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:02,978 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:02,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:02,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:05,573 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:05,574 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:05,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:05 BoogieIcfgContainer [2019-10-15 00:09:05,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:05,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:05,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:05,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:05,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:01" (1/3) ... [2019-10-15 00:09:05,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3043a50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:05, skipping insertion in model container [2019-10-15 00:09:05,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:02" (2/3) ... [2019-10-15 00:09:05,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3043a50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:05, skipping insertion in model container [2019-10-15 00:09:05,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:05" (3/3) ... [2019-10-15 00:09:05,584 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label42.c [2019-10-15 00:09:05,594 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:05,603 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:05,614 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:05,656 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:05,656 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:05,656 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:05,657 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:05,657 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:05,657 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:05,657 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:05,657 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 00:09:05,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:05,708 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] [2019-10-15 00:09:05,710 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1984606347, now seen corresponding path program 1 times [2019-10-15 00:09:05,727 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:05,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696095568] [2019-10-15 00:09:05,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:05,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:05,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:06,153 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 00:09:06,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696095568] [2019-10-15 00:09:06,154 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:06,155 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:06,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097073114] [2019-10-15 00:09:06,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:06,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:06,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:06,181 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:09:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:08,701 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:09:08,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:08,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-10-15 00:09:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:08,725 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:09:08,725 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:09:08,735 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 00:09:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:09:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:09:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:09:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-15 00:09:08,884 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 68 [2019-10-15 00:09:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:08,887 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-15 00:09:08,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-15 00:09:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-15 00:09:08,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:08,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:08,906 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:08,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1599900728, now seen corresponding path program 1 times [2019-10-15 00:09:08,907 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:08,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892337674] [2019-10-15 00:09:08,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:08,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:08,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:09,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892337674] [2019-10-15 00:09:09,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:09,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:09,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699051027] [2019-10-15 00:09:09,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:09,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:09,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:09,269 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-10-15 00:09:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:12,035 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-10-15 00:09:12,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:12,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-10-15 00:09:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:12,046 INFO L225 Difference]: With dead ends: 1730 [2019-10-15 00:09:12,047 INFO L226 Difference]: Without dead ends: 1054 [2019-10-15 00:09:12,050 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 00:09:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-10-15 00:09:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-10-15 00:09:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-10-15 00:09:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-10-15 00:09:12,112 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 160 [2019-10-15 00:09:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:12,115 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-10-15 00:09:12,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-10-15 00:09:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-10-15 00:09:12,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:12,124 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, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:09:12,125 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1250648855, now seen corresponding path program 1 times [2019-10-15 00:09:12,126 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:12,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91231624] [2019-10-15 00:09:12,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:12,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:12,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 122 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:12,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91231624] [2019-10-15 00:09:12,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380286980] [2019-10-15 00:09:12,510 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 00:09:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:12,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:12,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-15 00:09:12,879 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 122 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:13,108 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:13,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:13,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451608643] [2019-10-15 00:09:13,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:13,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:13,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:13,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:13,111 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-10-15 00:09:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:15,935 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-10-15 00:09:15,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:15,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2019-10-15 00:09:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:15,945 INFO L225 Difference]: With dead ends: 2427 [2019-10-15 00:09:15,945 INFO L226 Difference]: Without dead ends: 1399 [2019-10-15 00:09:15,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 535 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-10-15 00:09:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-10-15 00:09:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-10-15 00:09:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-10-15 00:09:15,993 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 270 [2019-10-15 00:09:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:15,994 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-10-15 00:09:15,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-10-15 00:09:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-10-15 00:09:16,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:16,001 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, 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, 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] [2019-10-15 00:09:16,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:16,206 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:16,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2015047681, now seen corresponding path program 1 times [2019-10-15 00:09:16,207 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:16,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117930019] [2019-10-15 00:09:16,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:16,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:16,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 183 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:16,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117930019] [2019-10-15 00:09:16,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888879647] [2019-10-15 00:09:16,509 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 00:09:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:16,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:16,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-15 00:09:16,758 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 183 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:17,005 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:17,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 00:09:17,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658481270] [2019-10-15 00:09:17,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:17,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:17,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:17,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:17,012 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-10-15 00:09:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:20,699 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-10-15 00:09:20,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:20,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 345 [2019-10-15 00:09:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:20,722 INFO L225 Difference]: With dead ends: 4241 [2019-10-15 00:09:20,722 INFO L226 Difference]: Without dead ends: 2859 [2019-10-15 00:09:20,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 688 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:09:20,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-10-15 00:09:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-10-15 00:09:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-10-15 00:09:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4286 transitions. [2019-10-15 00:09:20,818 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4286 transitions. Word has length 345 [2019-10-15 00:09:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:20,819 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4286 transitions. [2019-10-15 00:09:20,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4286 transitions. [2019-10-15 00:09:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-10-15 00:09:20,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:20,831 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, 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, 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] [2019-10-15 00:09:21,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:21,038 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:21,039 INFO L82 PathProgramCache]: Analyzing trace with hash 989447607, now seen corresponding path program 1 times [2019-10-15 00:09:21,039 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:21,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419938092] [2019-10-15 00:09:21,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:21,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:21,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 183 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:21,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419938092] [2019-10-15 00:09:21,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716053551] [2019-10-15 00:09:21,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:21,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:21,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-15 00:09:21,769 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 183 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:21,925 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:21,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:21,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531134609] [2019-10-15 00:09:21,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:21,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:21,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:21,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:21,927 INFO L87 Difference]: Start difference. First operand 2819 states and 4286 transitions. Second operand 5 states. [2019-10-15 00:09:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:24,832 INFO L93 Difference]: Finished difference Result 8487 states and 13369 transitions. [2019-10-15 00:09:24,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:24,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 349 [2019-10-15 00:09:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:24,876 INFO L225 Difference]: With dead ends: 8487 [2019-10-15 00:09:24,876 INFO L226 Difference]: Without dead ends: 5674 [2019-10-15 00:09:24,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 693 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-10-15 00:09:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-10-15 00:09:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-10-15 00:09:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7783 transitions. [2019-10-15 00:09:25,054 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7783 transitions. Word has length 349 [2019-10-15 00:09:25,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:25,058 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7783 transitions. [2019-10-15 00:09:25,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7783 transitions. [2019-10-15 00:09:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2019-10-15 00:09:25,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:25,069 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 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 00:09:25,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:25,274 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1448875587, now seen corresponding path program 1 times [2019-10-15 00:09:25,274 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:25,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472745237] [2019-10-15 00:09:25,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:25,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:25,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:26,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472745237] [2019-10-15 00:09:26,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285576778] [2019-10-15 00:09:26,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:26,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:27,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:27,251 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:27,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2080043919] [2019-10-15 00:09:27,533 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 375 [2019-10-15 00:09:27,603 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:27,603 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:32,031 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.