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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:15,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:15,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:15,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:15,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:15,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:15,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:15,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:15,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:15,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:15,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:15,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:15,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:15,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:15,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:15,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:15,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:15,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:15,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:15,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:15,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:15,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:15,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:15,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:15,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:15,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:15,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:15,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:15,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:15,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:15,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:15,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:15,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:15,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:15,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:15,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:15,956 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 [2019-10-14 22:04:15,983 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:15,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:15,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:15,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:15,989 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:15,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:15,989 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:15,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:15,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:15,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:15,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:15,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:15,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:15,992 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:15,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:15,992 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:15,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:15,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:15,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:15,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:15,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:15,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:15,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:15,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:15,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:15,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:15,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:15,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:15,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:16,260 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:16,271 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:16,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:16,277 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:16,277 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:16,278 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label24.c [2019-10-14 22:04:16,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53fc53ce/24be7564e04a4619b618cfe771b9b720/FLAG8c2d5dc0f [2019-10-14 22:04:16,904 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:16,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label24.c [2019-10-14 22:04:16,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53fc53ce/24be7564e04a4619b618cfe771b9b720/FLAG8c2d5dc0f [2019-10-14 22:04:17,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53fc53ce/24be7564e04a4619b618cfe771b9b720 [2019-10-14 22:04:17,090 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:17,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:17,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:17,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:17,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:17,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:17" (1/1) ... [2019-10-14 22:04:17,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167c183f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:17, skipping insertion in model container [2019-10-14 22:04:17,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:17" (1/1) ... [2019-10-14 22:04:17,112 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:17,197 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:17,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:17,983 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:18,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:18,221 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:18,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18 WrapperNode [2019-10-14 22:04:18,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:18,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:18,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:18,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:18,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (1/1) ... [2019-10-14 22:04:18,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (1/1) ... [2019-10-14 22:04:18,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (1/1) ... [2019-10-14 22:04:18,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (1/1) ... [2019-10-14 22:04:18,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (1/1) ... [2019-10-14 22:04:18,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (1/1) ... [2019-10-14 22:04:18,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (1/1) ... [2019-10-14 22:04:18,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:18,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:18,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:18,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:18,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (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 [2019-10-14 22:04:18,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:18,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:18,469 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:18,469 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:18,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:18,470 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:18,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:18,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:21,035 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:21,038 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:21,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:21 BoogieIcfgContainer [2019-10-14 22:04:21,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:21,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:21,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:21,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:21,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:17" (1/3) ... [2019-10-14 22:04:21,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57231830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:21, skipping insertion in model container [2019-10-14 22:04:21,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:18" (2/3) ... [2019-10-14 22:04:21,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57231830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:21, skipping insertion in model container [2019-10-14 22:04:21,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:21" (3/3) ... [2019-10-14 22:04:21,063 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label24.c [2019-10-14 22:04:21,075 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:21,087 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:21,098 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:21,139 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:21,139 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:21,139 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:21,139 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:21,139 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:21,140 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:21,140 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:21,140 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 22:04:21,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:21,181 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] [2019-10-14 22:04:21,183 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash 272014893, now seen corresponding path program 1 times [2019-10-14 22:04:21,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:21,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035906939] [2019-10-14 22:04:21,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:21,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035906939] [2019-10-14 22:04:21,579 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:21,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:21,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904147998] [2019-10-14 22:04:21,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:21,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:21,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:21,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:21,602 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:26,642 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-14 22:04:26,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:26,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-10-14 22:04:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:26,669 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:26,670 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:26,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-14 22:04:26,792 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 58 [2019-10-14 22:04:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:26,792 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-14 22:04:26,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-14 22:04:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-14 22:04:26,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:26,813 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, 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] [2019-10-14 22:04:26,814 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash 190582509, now seen corresponding path program 1 times [2019-10-14 22:04:26,815 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:26,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120111249] [2019-10-14 22:04:26,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:26,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:26,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 102 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:27,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120111249] [2019-10-14 22:04:27,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271436435] [2019-10-14 22:04:27,330 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 [2019-10-14 22:04:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:27,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-14 22:04:27,615 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:27,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-14 22:04:27,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472756108] [2019-10-14 22:04:27,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:27,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:27,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:27,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:27,621 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-14 22:04:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:31,672 INFO L93 Difference]: Finished difference Result 3131 states and 5064 transitions. [2019-10-14 22:04:31,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:31,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-10-14 22:04:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:31,688 INFO L225 Difference]: With dead ends: 3131 [2019-10-14 22:04:31,689 INFO L226 Difference]: Without dead ends: 2106 [2019-10-14 22:04:31,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-14 22:04:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2083. [2019-10-14 22:04:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-14 22:04:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3188 transitions. [2019-10-14 22:04:31,829 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3188 transitions. Word has length 240 [2019-10-14 22:04:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:31,833 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3188 transitions. [2019-10-14 22:04:31,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3188 transitions. [2019-10-14 22:04:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-10-14 22:04:31,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:31,848 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, 2, 2, 2, 2, 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] [2019-10-14 22:04:32,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:32,058 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1651699548, now seen corresponding path program 1 times [2019-10-14 22:04:32,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:32,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242208632] [2019-10-14 22:04:32,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:32,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:32,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 102 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:32,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242208632] [2019-10-14 22:04:32,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704300420] [2019-10-14 22:04:32,464 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 [2019-10-14 22:04:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:32,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-14 22:04:32,647 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:32,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:32,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434514986] [2019-10-14 22:04:32,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:32,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:32,649 INFO L87 Difference]: Start difference. First operand 2083 states and 3188 transitions. Second operand 5 states. [2019-10-14 22:04:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:35,683 INFO L93 Difference]: Finished difference Result 6311 states and 9957 transitions. [2019-10-14 22:04:35,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:35,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2019-10-14 22:04:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:35,715 INFO L225 Difference]: With dead ends: 6311 [2019-10-14 22:04:35,715 INFO L226 Difference]: Without dead ends: 4234 [2019-10-14 22:04:35,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:04:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-14 22:04:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-14 22:04:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-14 22:04:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-10-14 22:04:35,918 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 247 [2019-10-14 22:04:35,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:35,920 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-10-14 22:04:35,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-10-14 22:04:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-10-14 22:04:35,926 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:35,927 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:36,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:36,132 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:36,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 816359692, now seen corresponding path program 1 times [2019-10-14 22:04:36,133 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:36,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436069672] [2019-10-14 22:04:36,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:36,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:36,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:04:36,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436069672] [2019-10-14 22:04:36,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884297357] [2019-10-14 22:04:36,540 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 [2019-10-14 22:04:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:36,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:36,826 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:36,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:04:36,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503966014] [2019-10-14 22:04:36,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:04:36,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:36,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:04:36,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:36,829 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-10-14 22:04:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:44,459 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-10-14 22:04:44,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 22:04:44,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 287 [2019-10-14 22:04:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:44,495 INFO L225 Difference]: With dead ends: 13272 [2019-10-14 22:04:44,495 INFO L226 Difference]: Without dead ends: 7642 [2019-10-14 22:04:44,511 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 295 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:04:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-14 22:04:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6236. [2019-10-14 22:04:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6236 states. [2019-10-14 22:04:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 7162 transitions. [2019-10-14 22:04:44,690 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 7162 transitions. Word has length 287 [2019-10-14 22:04:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:44,692 INFO L462 AbstractCegarLoop]: Abstraction has 6236 states and 7162 transitions. [2019-10-14 22:04:44,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:04:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 7162 transitions. [2019-10-14 22:04:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2019-10-14 22:04:44,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:44,713 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:44,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:44,917 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1542869435, now seen corresponding path program 1 times [2019-10-14 22:04:44,919 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:44,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570802203] [2019-10-14 22:04:44,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:44,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:44,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 204 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-10-14 22:04:45,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570802203] [2019-10-14 22:04:45,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965883784] [2019-10-14 22:04:45,708 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 [2019-10-14 22:04:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:45,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2019-10-14 22:04:46,163 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:46,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:46,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740433193] [2019-10-14 22:04:46,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:46,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:46,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:46,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:46,165 INFO L87 Difference]: Start difference. First operand 6236 states and 7162 transitions. Second operand 5 states. [2019-10-14 22:04:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:47,968 INFO L93 Difference]: Finished difference Result 13846 states and 15934 transitions. [2019-10-14 22:04:47,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:04:47,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 556 [2019-10-14 22:04:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:48,008 INFO L225 Difference]: With dead ends: 13846 [2019-10-14 22:04:48,009 INFO L226 Difference]: Without dead ends: 7616 [2019-10-14 22:04:48,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 560 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-10-14 22:04:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7598. [2019-10-14 22:04:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7598 states. [2019-10-14 22:04:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7598 states to 7598 states and 8435 transitions. [2019-10-14 22:04:48,261 INFO L78 Accepts]: Start accepts. Automaton has 7598 states and 8435 transitions. Word has length 556 [2019-10-14 22:04:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:48,271 INFO L462 AbstractCegarLoop]: Abstraction has 7598 states and 8435 transitions. [2019-10-14 22:04:48,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 7598 states and 8435 transitions. [2019-10-14 22:04:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2019-10-14 22:04:48,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:48,299 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-10-14 22:04:48,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:48,504 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash 857894719, now seen corresponding path program 1 times [2019-10-14 22:04:48,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:48,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379644565] [2019-10-14 22:04:48,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:48,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:48,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 324 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-10-14 22:04:49,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379644565] [2019-10-14 22:04:49,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990525049] [2019-10-14 22:04:49,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:49,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 686 proven. 2 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-10-14 22:04:50,237 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:50,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:50,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398546891] [2019-10-14 22:04:50,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:50,240 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:50,240 INFO L87 Difference]: Start difference. First operand 7598 states and 8435 transitions. Second operand 11 states.