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_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:03:08,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:03:08,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:03:08,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:03:08,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:03:08,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:03:08,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:03:08,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:03:08,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:03:08,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:03:08,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:03:08,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:03:08,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:03:08,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:03:08,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:03:08,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:03:08,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:03:08,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:03:08,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:03:08,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:03:08,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:03:08,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:03:08,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:03:08,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:03:08,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:03:08,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:03:08,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:03:08,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:03:08,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:03:08,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:03:08,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:03:08,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:03:08,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:03:08,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:03:08,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:03:08,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:03:08,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:03:08,251 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:03:08,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:03:08,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:03:08,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:03:08,257 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:03:08,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:03:08,257 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:03:08,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:03:08,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:03:08,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:03:08,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:03:08,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:03:08,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:03:08,259 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:03:08,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:03:08,259 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:03:08,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:03:08,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:03:08,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:03:08,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:03:08,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:03:08,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:08,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:03:08,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:03:08,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:03:08,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:03:08,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:03:08,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:03:08,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:03:08,598 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:03:08,617 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:03:08,621 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:03:08,623 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:03:08,623 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:03:08,624 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-10-14 22:03:08,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084fe4f55/21192d0f803a4a3bbb70122e7f83b1e5/FLAG19bb71773 [2019-10-14 22:03:09,352 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:03:09,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-10-14 22:03:09,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084fe4f55/21192d0f803a4a3bbb70122e7f83b1e5/FLAG19bb71773 [2019-10-14 22:03:09,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084fe4f55/21192d0f803a4a3bbb70122e7f83b1e5 [2019-10-14 22:03:09,540 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:03:09,542 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:03:09,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:09,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:03:09,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:03:09,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:09" (1/1) ... [2019-10-14 22:03:09,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@580da5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:09, skipping insertion in model container [2019-10-14 22:03:09,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:09" (1/1) ... [2019-10-14 22:03:09,560 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:03:09,632 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:03:10,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:10,591 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:03:10,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:11,011 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:03:11,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11 WrapperNode [2019-10-14 22:03:11,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:11,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:03:11,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:03:11,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:03:11,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (1/1) ... [2019-10-14 22:03:11,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (1/1) ... [2019-10-14 22:03:11,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (1/1) ... [2019-10-14 22:03:11,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (1/1) ... [2019-10-14 22:03:11,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (1/1) ... [2019-10-14 22:03:11,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (1/1) ... [2019-10-14 22:03:11,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (1/1) ... [2019-10-14 22:03:11,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:03:11,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:03:11,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:03:11,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:03:11,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:03:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:03:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:03:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:03:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:03:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:03:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:03:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:03:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:03:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:03:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:03:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:03:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:03:14,937 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:03:14,937 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:03:14,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:14 BoogieIcfgContainer [2019-10-14 22:03:14,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:03:14,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:03:14,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:03:14,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:03:14,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:03:09" (1/3) ... [2019-10-14 22:03:14,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665e4cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:14, skipping insertion in model container [2019-10-14 22:03:14,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:11" (2/3) ... [2019-10-14 22:03:14,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665e4cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:14, skipping insertion in model container [2019-10-14 22:03:14,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:14" (3/3) ... [2019-10-14 22:03:14,950 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2019-10-14 22:03:14,959 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:03:14,968 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:03:14,980 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:03:15,010 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:03:15,011 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:03:15,011 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:03:15,011 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:03:15,011 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:03:15,011 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:03:15,011 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:03:15,012 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:03:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-14 22:03:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 22:03:15,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:15,067 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:15,069 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1512840592, now seen corresponding path program 1 times [2019-10-14 22:03:15,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:15,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870080547] [2019-10-14 22:03:15,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:15,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:15,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:15,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870080547] [2019-10-14 22:03:15,499 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:15,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:03:15,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398581344] [2019-10-14 22:03:15,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:15,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:15,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:15,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:03:15,522 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-14 22:03:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:22,505 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-10-14 22:03:22,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:22,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-14 22:03:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:22,537 INFO L225 Difference]: With dead ends: 1575 [2019-10-14 22:03:22,537 INFO L226 Difference]: Without dead ends: 1055 [2019-10-14 22:03:22,551 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 [2019-10-14 22:03:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-10-14 22:03:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-10-14 22:03:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-10-14 22:03:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-10-14 22:03:22,687 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 42 [2019-10-14 22:03:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:22,688 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-10-14 22:03:22,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-10-14 22:03:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 22:03:22,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:22,694 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:22,695 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:22,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1983802676, now seen corresponding path program 1 times [2019-10-14 22:03:22,696 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:22,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065725443] [2019-10-14 22:03:22,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:22,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:22,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:23,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065725443] [2019-10-14 22:03:23,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133441637] [2019-10-14 22:03:23,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:23,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:23,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:23,247 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:23,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:23,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59695607] [2019-10-14 22:03:23,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:23,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:23,253 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-10-14 22:03:26,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:26,089 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-10-14 22:03:26,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:26,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-10-14 22:03:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:26,107 INFO L225 Difference]: With dead ends: 2976 [2019-10-14 22:03:26,108 INFO L226 Difference]: Without dead ends: 1958 [2019-10-14 22:03:26,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-10-14 22:03:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-10-14 22:03:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-10-14 22:03:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-10-14 22:03:26,209 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 111 [2019-10-14 22:03:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:26,212 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-10-14 22:03:26,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-10-14 22:03:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 22:03:26,225 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:26,226 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:26,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:26,435 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1476577176, now seen corresponding path program 1 times [2019-10-14 22:03:26,436 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:26,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326987525] [2019-10-14 22:03:26,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:26,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:26,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:26,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326987525] [2019-10-14 22:03:26,772 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:26,772 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:03:26,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862418132] [2019-10-14 22:03:26,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:26,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:26,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:26,783 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-10-14 22:03:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:32,399 INFO L93 Difference]: Finished difference Result 5861 states and 8774 transitions. [2019-10-14 22:03:32,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:03:32,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2019-10-14 22:03:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:32,423 INFO L225 Difference]: With dead ends: 5861 [2019-10-14 22:03:32,423 INFO L226 Difference]: Without dead ends: 3912 [2019-10-14 22:03:32,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:03:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2019-10-14 22:03:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934. [2019-10-14 22:03:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-10-14 22:03:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-10-14 22:03:32,524 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 128 [2019-10-14 22:03:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:32,525 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-10-14 22:03:32,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:03:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-10-14 22:03:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-10-14 22:03:32,530 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:32,531 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:32,531 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:32,531 INFO L82 PathProgramCache]: Analyzing trace with hash -698668765, now seen corresponding path program 1 times [2019-10-14 22:03:32,532 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:32,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602848136] [2019-10-14 22:03:32,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:32,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:32,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:33,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602848136] [2019-10-14 22:03:33,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955517760] [2019-10-14 22:03:33,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:33,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:33,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:33,369 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:33,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:33,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247251763] [2019-10-14 22:03:33,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:33,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:33,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:33,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:33,374 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 3 states. [2019-10-14 22:03:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:35,516 INFO L93 Difference]: Finished difference Result 7426 states and 10578 transitions. [2019-10-14 22:03:35,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:35,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 316 [2019-10-14 22:03:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:35,539 INFO L225 Difference]: With dead ends: 7426 [2019-10-14 22:03:35,539 INFO L226 Difference]: Without dead ends: 4498 [2019-10-14 22:03:35,548 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2019-10-14 22:03:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4495. [2019-10-14 22:03:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4495 states. [2019-10-14 22:03:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 6012 transitions. [2019-10-14 22:03:35,661 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 6012 transitions. Word has length 316 [2019-10-14 22:03:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:35,662 INFO L462 AbstractCegarLoop]: Abstraction has 4495 states and 6012 transitions. [2019-10-14 22:03:35,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 6012 transitions. [2019-10-14 22:03:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-14 22:03:35,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:35,673 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:35,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:35,877 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:35,878 INFO L82 PathProgramCache]: Analyzing trace with hash -839432913, now seen corresponding path program 1 times [2019-10-14 22:03:35,879 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:35,879 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541423733] [2019-10-14 22:03:35,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:35,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:35,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 22:03:36,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541423733] [2019-10-14 22:03:36,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760283830] [2019-10-14 22:03:36,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:36,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:36,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:36,785 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:36,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:03:36,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718579281] [2019-10-14 22:03:36,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:03:36,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:36,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:03:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:03:36,788 INFO L87 Difference]: Start difference. First operand 4495 states and 6012 transitions. Second operand 11 states.