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/Problem15_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:57,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:57,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:57,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:57,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:57,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:57,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:57,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:57,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:57,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:57,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:57,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:57,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:57,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:57,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:57,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:57,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:57,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:57,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:57,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:57,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:57,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:57,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:57,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:57,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:57,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:57,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:57,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:57,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:57,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:57,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:57,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:57,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:57,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:57,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:57,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:57,210 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 [2019-10-13 18:03:57,236 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:57,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:57,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:57,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:57,237 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:57,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:57,238 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:57,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:57,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:57,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:57,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:57,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:57,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:57,241 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:57,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:57,242 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:57,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:57,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:57,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:57,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:57,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:57,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:57,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:57,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:57,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:57,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:57,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:57,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:57,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:57,509 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:57,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:57,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:57,532 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:57,532 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:57,533 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-10-13 18:03:57,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2eb8144e/0e6a28cd671e44a8b60a74d414940e2f/FLAG48d57c3ae [2019-10-13 18:03:58,297 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:58,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-10-13 18:03:58,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2eb8144e/0e6a28cd671e44a8b60a74d414940e2f/FLAG48d57c3ae [2019-10-13 18:03:58,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2eb8144e/0e6a28cd671e44a8b60a74d414940e2f [2019-10-13 18:03:58,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:58,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:58,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:58,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:58,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:58,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:58" (1/1) ... [2019-10-13 18:03:58,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f096a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:58, skipping insertion in model container [2019-10-13 18:03:58,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:58" (1/1) ... [2019-10-13 18:03:58,467 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:58,545 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:59,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:59,522 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:59,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:59,887 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:59,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59 WrapperNode [2019-10-13 18:03:59,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:59,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:59,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:59,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:59,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (1/1) ... [2019-10-13 18:03:59,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (1/1) ... [2019-10-13 18:03:59,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (1/1) ... [2019-10-13 18:03:59,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (1/1) ... [2019-10-13 18:04:00,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (1/1) ... [2019-10-13 18:04:00,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (1/1) ... [2019-10-13 18:04:00,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (1/1) ... [2019-10-13 18:04:00,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:00,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:00,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:00,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:00,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (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 [2019-10-13 18:04:00,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:00,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:00,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:00,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:00,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:00,131 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:00,131 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:00,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:00,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:00,132 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:00,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:00,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:00,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:03,467 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:03,467 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:03,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:03 BoogieIcfgContainer [2019-10-13 18:04:03,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:03,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:03,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:03,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:03,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:58" (1/3) ... [2019-10-13 18:04:03,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536975f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:03, skipping insertion in model container [2019-10-13 18:04:03,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:59" (2/3) ... [2019-10-13 18:04:03,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536975f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:03, skipping insertion in model container [2019-10-13 18:04:03,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:03" (3/3) ... [2019-10-13 18:04:03,477 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label23.c [2019-10-13 18:04:03,486 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:03,494 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:03,505 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:03,533 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:03,534 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:03,534 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:03,534 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:03,534 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:03,535 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:03,535 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:03,535 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:04:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 18:04:03,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:03,571 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] [2019-10-13 18:04:03,573 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1150521477, now seen corresponding path program 1 times [2019-10-13 18:04:03,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:03,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573470085] [2019-10-13 18:04:03,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:03,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:03,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:03,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573470085] [2019-10-13 18:04:03,893 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:03,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:03,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057932499] [2019-10-13 18:04:03,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:03,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:03,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:03,915 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:10,147 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-10-13 18:04:10,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:10,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-13 18:04:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:10,174 INFO L225 Difference]: With dead ends: 1575 [2019-10-13 18:04:10,174 INFO L226 Difference]: Without dead ends: 1055 [2019-10-13 18:04:10,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-10-13 18:04:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-10-13 18:04:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-10-13 18:04:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-10-13 18:04:10,313 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 23 [2019-10-13 18:04:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:10,313 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-10-13 18:04:10,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-10-13 18:04:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 18:04:10,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:10,318 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:04:10,319 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1552013474, now seen corresponding path program 1 times [2019-10-13 18:04:10,319 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:10,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654044565] [2019-10-13 18:04:10,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:10,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:10,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:10,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654044565] [2019-10-13 18:04:10,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324066043] [2019-10-13 18:04:10,622 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 [2019-10-13 18:04:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:10,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:10,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:10,776 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:10,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:04:10,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144757040] [2019-10-13 18:04:10,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:10,781 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:10,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:10,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:04:10,782 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-10-13 18:04:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:12,821 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-10-13 18:04:12,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:12,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-10-13 18:04:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:12,835 INFO L225 Difference]: With dead ends: 2976 [2019-10-13 18:04:12,835 INFO L226 Difference]: Without dead ends: 1958 [2019-10-13 18:04:12,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:04:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-10-13 18:04:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-10-13 18:04:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-10-13 18:04:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-10-13 18:04:12,910 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 92 [2019-10-13 18:04:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:12,911 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-10-13 18:04:12,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-10-13 18:04:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 18:04:12,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:12,916 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:13,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:13,122 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash 317241164, now seen corresponding path program 1 times [2019-10-13 18:04:13,123 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:13,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775719852] [2019-10-13 18:04:13,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:13,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:13,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:13,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775719852] [2019-10-13 18:04:13,430 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:13,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:04:13,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287718094] [2019-10-13 18:04:13,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:13,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:13,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:13,437 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-10-13 18:04:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:19,776 INFO L93 Difference]: Finished difference Result 5861 states and 8774 transitions. [2019-10-13 18:04:19,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:04:19,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2019-10-13 18:04:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:19,797 INFO L225 Difference]: With dead ends: 5861 [2019-10-13 18:04:19,798 INFO L226 Difference]: Without dead ends: 3912 [2019-10-13 18:04:19,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2019-10-13 18:04:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934. [2019-10-13 18:04:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-10-13 18:04:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-10-13 18:04:19,900 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 109 [2019-10-13 18:04:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:19,900 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-10-13 18:04:19,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-10-13 18:04:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-10-13 18:04:19,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:19,907 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:19,907 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:19,908 INFO L82 PathProgramCache]: Analyzing trace with hash 993341937, now seen corresponding path program 1 times [2019-10-13 18:04:19,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:19,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441764990] [2019-10-13 18:04:19,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:19,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:19,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:04:20,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441764990] [2019-10-13 18:04:20,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384721552] [2019-10-13 18:04:20,682 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 [2019-10-13 18:04:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:20,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 18:04:20,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:04:20,983 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:20,984 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-13 18:04:20,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725099856] [2019-10-13 18:04:20,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:20,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:20,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:20,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:20,988 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 8 states. [2019-10-13 18:04:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:27,051 INFO L93 Difference]: Finished difference Result 9968 states and 14056 transitions. [2019-10-13 18:04:27,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:04:27,052 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 297 [2019-10-13 18:04:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:27,118 INFO L225 Difference]: With dead ends: 9968 [2019-10-13 18:04:27,119 INFO L226 Difference]: Without dead ends: 7040 [2019-10-13 18:04:27,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2019-10-13 18:04:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 6406. [2019-10-13 18:04:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6406 states. [2019-10-13 18:04:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 8425 transitions. [2019-10-13 18:04:27,318 INFO L78 Accepts]: Start accepts. Automaton has 6406 states and 8425 transitions. Word has length 297 [2019-10-13 18:04:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:27,321 INFO L462 AbstractCegarLoop]: Abstraction has 6406 states and 8425 transitions. [2019-10-13 18:04:27,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 6406 states and 8425 transitions. [2019-10-13 18:04:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-10-13 18:04:27,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:27,329 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:04:27,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:27,541 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2040498893, now seen corresponding path program 1 times [2019-10-13 18:04:27,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:27,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859332567] [2019-10-13 18:04:27,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:27,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:27,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-13 18:04:27,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859332567] [2019-10-13 18:04:27,954 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:27,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:04:27,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366410640] [2019-10-13 18:04:27,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 18:04:27,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 18:04:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:04:27,957 INFO L87 Difference]: Start difference. First operand 6406 states and 8425 transitions. Second operand 6 states. [2019-10-13 18:04:33,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:33,006 INFO L93 Difference]: Finished difference Result 15941 states and 21728 transitions. [2019-10-13 18:04:33,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:33,007 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 349 [2019-10-13 18:04:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:33,048 INFO L225 Difference]: With dead ends: 15941 [2019-10-13 18:04:33,048 INFO L226 Difference]: Without dead ends: 9541 [2019-10-13 18:04:33,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2019-10-13 18:04:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8603. [2019-10-13 18:04:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8603 states. [2019-10-13 18:04:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 10794 transitions. [2019-10-13 18:04:33,288 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 10794 transitions. Word has length 349 [2019-10-13 18:04:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:33,290 INFO L462 AbstractCegarLoop]: Abstraction has 8603 states and 10794 transitions. [2019-10-13 18:04:33,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 18:04:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 10794 transitions. [2019-10-13 18:04:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-10-13 18:04:33,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:33,300 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:33,300 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1962388647, now seen corresponding path program 1 times [2019-10-13 18:04:33,304 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:33,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670878077] [2019-10-13 18:04:33,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:33,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:33,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:04:34,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670878077] [2019-10-13 18:04:34,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62296174] [2019-10-13 18:04:34,078 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 [2019-10-13 18:04:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:34,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:34,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:34,431 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:34,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:04:34,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186355626] [2019-10-13 18:04:34,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:04:34,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:04:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:04:34,434 INFO L87 Difference]: Start difference. First operand 8603 states and 10794 transitions. Second operand 11 states.