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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:38,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:38,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:38,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:38,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:38,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:38,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:38,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:38,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:38,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:38,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:38,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:38,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:38,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:38,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:38,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:38,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:38,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:38,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:38,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:38,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:38,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:38,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:38,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:38,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:38,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:38,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:38,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:38,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:38,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:38,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:38,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:38,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:38,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:38,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:38,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:38,191 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 18:04:38,210 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:38,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:38,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:38,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:38,213 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:38,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:38,213 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:38,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:38,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:38,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:38,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:38,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:38,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:38,216 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:38,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:38,216 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:38,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:38,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:38,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:38,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:38,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:38,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:38,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:38,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:38,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:38,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:38,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:38,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:38,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:38,497 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:38,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:38,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:38,523 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:38,523 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:38,524 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label56.c [2019-10-13 18:04:38,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8410f632c/1b54d167e3a8440d8e4465267d387a46/FLAG54a4ab20c [2019-10-13 18:04:39,280 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:39,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label56.c [2019-10-13 18:04:39,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8410f632c/1b54d167e3a8440d8e4465267d387a46/FLAG54a4ab20c [2019-10-13 18:04:39,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8410f632c/1b54d167e3a8440d8e4465267d387a46 [2019-10-13 18:04:39,503 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:39,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:39,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:39,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:39,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:39,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d60e989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39, skipping insertion in model container [2019-10-13 18:04:39,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,525 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:39,623 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:40,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:40,588 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:41,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:41,202 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:41,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41 WrapperNode [2019-10-13 18:04:41,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:41,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:41,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:41,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:41,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (1/1) ... [2019-10-13 18:04:41,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (1/1) ... [2019-10-13 18:04:41,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (1/1) ... [2019-10-13 18:04:41,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (1/1) ... [2019-10-13 18:04:41,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (1/1) ... [2019-10-13 18:04:41,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (1/1) ... [2019-10-13 18:04:41,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (1/1) ... [2019-10-13 18:04:41,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:41,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:41,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:41,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:41,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (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 18:04:41,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:41,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:41,530 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:41,530 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:41,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:41,531 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:41,531 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:41,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:41,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:41,532 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:41,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:41,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:41,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:44,920 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:44,920 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:44,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:44 BoogieIcfgContainer [2019-10-13 18:04:44,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:44,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:44,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:44,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:44,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:39" (1/3) ... [2019-10-13 18:04:44,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60dcd037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:44, skipping insertion in model container [2019-10-13 18:04:44,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:41" (2/3) ... [2019-10-13 18:04:44,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60dcd037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:44, skipping insertion in model container [2019-10-13 18:04:44,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:44" (3/3) ... [2019-10-13 18:04:44,930 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label56.c [2019-10-13 18:04:44,940 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:44,948 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:44,959 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:44,996 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:44,996 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:44,997 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:44,997 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:44,997 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:44,997 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:44,997 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:44,997 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:04:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 18:04:45,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:45,043 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] [2019-10-13 18:04:45,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:45,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:45,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2075233339, now seen corresponding path program 1 times [2019-10-13 18:04:45,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:45,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418908051] [2019-10-13 18:04:45,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:45,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:45,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:45,462 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 18:04:45,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418908051] [2019-10-13 18:04:45,464 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:45,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:45,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804401105] [2019-10-13 18:04:45,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:45,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:45,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:45,494 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:52,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:52,023 INFO L93 Difference]: Finished difference Result 1513 states and 2781 transitions. [2019-10-13 18:04:52,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:52,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-13 18:04:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:52,056 INFO L225 Difference]: With dead ends: 1513 [2019-10-13 18:04:52,057 INFO L226 Difference]: Without dead ends: 1007 [2019-10-13 18:04:52,065 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 18:04:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2019-10-13 18:04:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 999. [2019-10-13 18:04:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2019-10-13 18:04:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1377 transitions. [2019-10-13 18:04:52,192 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1377 transitions. Word has length 39 [2019-10-13 18:04:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:52,194 INFO L462 AbstractCegarLoop]: Abstraction has 999 states and 1377 transitions. [2019-10-13 18:04:52,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1377 transitions. [2019-10-13 18:04:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 18:04:52,203 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:52,204 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:52,205 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:52,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1497947422, now seen corresponding path program 1 times [2019-10-13 18:04:52,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:52,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161396333] [2019-10-13 18:04:52,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:52,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:52,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:52,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161396333] [2019-10-13 18:04:52,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213500949] [2019-10-13 18:04:52,507 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 18:04:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:52,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:52,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:52,717 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:52,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:04:52,717 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554114514] [2019-10-13 18:04:52,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:52,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:52,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:52,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:52,720 INFO L87 Difference]: Start difference. First operand 999 states and 1377 transitions. Second operand 3 states. [2019-10-13 18:04:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:54,919 INFO L93 Difference]: Finished difference Result 2620 states and 3685 transitions. [2019-10-13 18:04:54,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:54,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2019-10-13 18:04:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:54,928 INFO L225 Difference]: With dead ends: 2620 [2019-10-13 18:04:54,928 INFO L226 Difference]: Without dead ends: 1627 [2019-10-13 18:04:54,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2019-10-13 18:04:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1625. [2019-10-13 18:04:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1625 states. [2019-10-13 18:04:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2077 transitions. [2019-10-13 18:04:55,073 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2077 transitions. Word has length 108 [2019-10-13 18:04:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:55,074 INFO L462 AbstractCegarLoop]: Abstraction has 1625 states and 2077 transitions. [2019-10-13 18:04:55,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2077 transitions. [2019-10-13 18:04:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-13 18:04:55,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:55,080 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:04:55,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:55,293 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash -311064930, now seen corresponding path program 1 times [2019-10-13 18:04:55,294 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:55,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048842048] [2019-10-13 18:04:55,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:55,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:55,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 65 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:04:55,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048842048] [2019-10-13 18:04:55,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321156643] [2019-10-13 18:04:55,762 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 18:04:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:55,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 18:04:55,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 18:04:56,080 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:56,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-10-13 18:04:56,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879117502] [2019-10-13 18:04:56,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 18:04:56,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 18:04:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:04:56,084 INFO L87 Difference]: Start difference. First operand 1625 states and 2077 transitions. Second operand 13 states. [2019-10-13 18:05:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:12,737 INFO L93 Difference]: Finished difference Result 8762 states and 11770 transitions. [2019-10-13 18:05:12,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-10-13 18:05:12,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 213 [2019-10-13 18:05:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:12,770 INFO L225 Difference]: With dead ends: 8762 [2019-10-13 18:05:12,771 INFO L226 Difference]: Without dead ends: 7143 [2019-10-13 18:05:12,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=3742, Unknown=0, NotChecked=0, Total=4422 [2019-10-13 18:05:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2019-10-13 18:05:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 7027. [2019-10-13 18:05:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7027 states. [2019-10-13 18:05:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7027 states to 7027 states and 8357 transitions. [2019-10-13 18:05:13,005 INFO L78 Accepts]: Start accepts. Automaton has 7027 states and 8357 transitions. Word has length 213 [2019-10-13 18:05:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:13,006 INFO L462 AbstractCegarLoop]: Abstraction has 7027 states and 8357 transitions. [2019-10-13 18:05:13,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 18:05:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7027 states and 8357 transitions. [2019-10-13 18:05:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-10-13 18:05:13,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:13,014 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:13,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:13,227 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash 52374044, now seen corresponding path program 1 times [2019-10-13 18:05:13,228 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:13,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49294853] [2019-10-13 18:05:13,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:13,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:13,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:05:13,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49294853] [2019-10-13 18:05:13,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932989649] [2019-10-13 18:05:13,598 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 18:05:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:13,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:13,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:05:13,852 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:13,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:05:13,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285595044] [2019-10-13 18:05:13,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:05:13,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:05:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:13,855 INFO L87 Difference]: Start difference. First operand 7027 states and 8357 transitions. Second operand 3 states. [2019-10-13 18:05:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:16,848 INFO L93 Difference]: Finished difference Result 16233 states and 19877 transitions. [2019-10-13 18:05:16,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:05:16,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 319 [2019-10-13 18:05:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:16,891 INFO L225 Difference]: With dead ends: 16233 [2019-10-13 18:05:16,891 INFO L226 Difference]: Without dead ends: 9519 [2019-10-13 18:05:16,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9519 states. [2019-10-13 18:05:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9519 to 8903. [2019-10-13 18:05:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8903 states. [2019-10-13 18:05:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 10907 transitions. [2019-10-13 18:05:17,181 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 10907 transitions. Word has length 319 [2019-10-13 18:05:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:17,183 INFO L462 AbstractCegarLoop]: Abstraction has 8903 states and 10907 transitions. [2019-10-13 18:05:17,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:05:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 10907 transitions. [2019-10-13 18:05:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2019-10-13 18:05:17,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:17,195 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:17,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:17,406 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:17,407 INFO L82 PathProgramCache]: Analyzing trace with hash 698078374, now seen corresponding path program 1 times [2019-10-13 18:05:17,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:17,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721630998] [2019-10-13 18:05:17,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:17,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:17,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 253 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 18:05:17,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721630998] [2019-10-13 18:05:17,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280800059] [2019-10-13 18:05:17,976 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 [2019-10-13 18:05:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:18,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:18,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 255 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:05:18,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:18,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:18,256 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156085679] [2019-10-13 18:05:18,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:18,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:18,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:18,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:18,259 INFO L87 Difference]: Start difference. First operand 8903 states and 10907 transitions. Second operand 11 states.