java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:12,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:12,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:12,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:12,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:12,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:12,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:12,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:12,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:12,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:12,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:12,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:12,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:12,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:12,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:12,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:12,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:12,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:12,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:12,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:12,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:12,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:12,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:12,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:12,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:06:12,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:12,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:12,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:12,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:12,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:12,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:12,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:12,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:12,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:12,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:12,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:12,302 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 18:06:12,321 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:12,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:12,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:12,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:12,323 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:12,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:12,324 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:12,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:12,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:12,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:12,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:12,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:12,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:12,326 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:12,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:12,327 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:12,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:12,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:12,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:12,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:12,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:12,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:12,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:12,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:12,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:12,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:12,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:12,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:12,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:12,650 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:12,662 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:12,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:12,667 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:12,668 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:12,668 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-13 18:06:12,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ebb3131/aa262a5b784b4646a4b0e2f50abd4826/FLAGed521cb06 [2019-10-13 18:06:13,381 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:13,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-13 18:06:13,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ebb3131/aa262a5b784b4646a4b0e2f50abd4826/FLAGed521cb06 [2019-10-13 18:06:13,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ebb3131/aa262a5b784b4646a4b0e2f50abd4826 [2019-10-13 18:06:13,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:13,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:13,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:13,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:13,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:13,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:13" (1/1) ... [2019-10-13 18:06:13,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:13, skipping insertion in model container [2019-10-13 18:06:13,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:13" (1/1) ... [2019-10-13 18:06:13,600 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:13,677 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:14,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:14,461 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:14,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:14,791 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:14,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14 WrapperNode [2019-10-13 18:06:14,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:14,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:14,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:14,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:14,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:15,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:15,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:15,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:15,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (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 18:06:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:15,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:15,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:15,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:15,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:15,068 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:15,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:15,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:17,492 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:17,492 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:17,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:17 BoogieIcfgContainer [2019-10-13 18:06:17,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:17,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:17,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:17,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:17,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:13" (1/3) ... [2019-10-13 18:06:17,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b802ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:17, skipping insertion in model container [2019-10-13 18:06:17,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14" (2/3) ... [2019-10-13 18:06:17,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b802ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:17, skipping insertion in model container [2019-10-13 18:06:17,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:17" (3/3) ... [2019-10-13 18:06:17,509 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label57.c [2019-10-13 18:06:17,521 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:17,531 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:17,543 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:17,587 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:17,587 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:17,587 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:17,588 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:17,588 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:17,588 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:17,588 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:17,588 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:06:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 18:06:17,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:17,635 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:17,636 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:17,643 INFO L82 PathProgramCache]: Analyzing trace with hash 10915389, now seen corresponding path program 1 times [2019-10-13 18:06:17,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:17,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387900613] [2019-10-13 18:06:17,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:17,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:17,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:18,047 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 18:06:18,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387900613] [2019-10-13 18:06:18,049 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:18,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:18,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647943782] [2019-10-13 18:06:18,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:18,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:18,073 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:06:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:23,443 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:06:23,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:23,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-10-13 18:06:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:23,482 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:06:23,482 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:06:23,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:06:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:06:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:06:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-10-13 18:06:23,621 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 46 [2019-10-13 18:06:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:23,622 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-10-13 18:06:23,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-10-13 18:06:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-13 18:06:23,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:23,634 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:06:23,634 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash 626309048, now seen corresponding path program 1 times [2019-10-13 18:06:23,635 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:23,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519257337] [2019-10-13 18:06:23,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:23,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:23,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 78 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:06:24,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519257337] [2019-10-13 18:06:24,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330558449] [2019-10-13 18:06:24,166 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 18:06:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:24,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 18:06:24,435 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:24,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:06:24,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117323890] [2019-10-13 18:06:24,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:24,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:24,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:24,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:24,440 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-10-13 18:06:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:28,248 INFO L93 Difference]: Finished difference Result 3131 states and 5147 transitions. [2019-10-13 18:06:28,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:06:28,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2019-10-13 18:06:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:28,266 INFO L225 Difference]: With dead ends: 3131 [2019-10-13 18:06:28,266 INFO L226 Difference]: Without dead ends: 2106 [2019-10-13 18:06:28,270 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-13 18:06:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078. [2019-10-13 18:06:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-10-13 18:06:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3239 transitions. [2019-10-13 18:06:28,349 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3239 transitions. Word has length 213 [2019-10-13 18:06:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:28,350 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3239 transitions. [2019-10-13 18:06:28,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3239 transitions. [2019-10-13 18:06:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-13 18:06:28,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:28,358 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:06:28,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:28,562 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash 537819504, now seen corresponding path program 1 times [2019-10-13 18:06:28,564 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:28,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798671580] [2019-10-13 18:06:28,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:28,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:28,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 78 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:06:28,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798671580] [2019-10-13 18:06:28,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270396055] [2019-10-13 18:06:28,894 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 18:06:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:28,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:28,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 18:06:29,054 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:29,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:29,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670069501] [2019-10-13 18:06:29,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:29,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:29,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:29,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:29,056 INFO L87 Difference]: Start difference. First operand 2078 states and 3239 transitions. Second operand 5 states. [2019-10-13 18:06:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:31,918 INFO L93 Difference]: Finished difference Result 6302 states and 10079 transitions. [2019-10-13 18:06:31,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:06:31,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2019-10-13 18:06:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:31,942 INFO L225 Difference]: With dead ends: 6302 [2019-10-13 18:06:31,943 INFO L226 Difference]: Without dead ends: 4230 [2019-10-13 18:06:31,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:06:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-10-13 18:06:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-10-13 18:06:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-10-13 18:06:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5867 transitions. [2019-10-13 18:06:32,085 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5867 transitions. Word has length 217 [2019-10-13 18:06:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:32,087 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5867 transitions. [2019-10-13 18:06:32,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5867 transitions. [2019-10-13 18:06:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-10-13 18:06:32,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:32,097 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:32,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:32,302 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:32,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1755403504, now seen corresponding path program 1 times [2019-10-13 18:06:32,303 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:32,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554120822] [2019-10-13 18:06:32,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:32,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:32,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 198 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 18:06:32,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554120822] [2019-10-13 18:06:32,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298486477] [2019-10-13 18:06:32,729 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 18:06:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:32,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:32,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 18:06:32,974 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:32,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:06:32,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896081191] [2019-10-13 18:06:32,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:32,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:32,976 INFO L87 Difference]: Start difference. First operand 4208 states and 5867 transitions. Second operand 11 states. [2019-10-13 18:06:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:37,617 INFO L93 Difference]: Finished difference Result 10864 states and 15765 transitions. [2019-10-13 18:06:37,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:06:37,618 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 336 [2019-10-13 18:06:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:37,652 INFO L225 Difference]: With dead ends: 10864 [2019-10-13 18:06:37,652 INFO L226 Difference]: Without dead ends: 6662 [2019-10-13 18:06:37,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 343 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:06:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-10-13 18:06:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4591. [2019-10-13 18:06:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4591 states. [2019-10-13 18:06:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6444 transitions. [2019-10-13 18:06:37,801 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 6444 transitions. Word has length 336 [2019-10-13 18:06:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:37,803 INFO L462 AbstractCegarLoop]: Abstraction has 4591 states and 6444 transitions. [2019-10-13 18:06:37,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 6444 transitions. [2019-10-13 18:06:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2019-10-13 18:06:37,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:37,814 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:06:38,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:38,018 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:38,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1593066728, now seen corresponding path program 1 times [2019-10-13 18:06:38,020 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:38,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6486090] [2019-10-13 18:06:38,021 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:38,021 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:38,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 117 proven. 221 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-10-13 18:06:38,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6486090] [2019-10-13 18:06:38,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752982955] [2019-10-13 18:06:38,549 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 18:06:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:38,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-13 18:06:38,843 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:38,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:38,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393454303] [2019-10-13 18:06:38,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:38,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:38,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:38,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:38,856 INFO L87 Difference]: Start difference. First operand 4591 states and 6444 transitions. Second operand 5 states. [2019-10-13 18:06:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:41,442 INFO L93 Difference]: Finished difference Result 10581 states and 14860 transitions. [2019-10-13 18:06:41,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:06:41,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 412 [2019-10-13 18:06:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:41,469 INFO L225 Difference]: With dead ends: 10581 [2019-10-13 18:06:41,469 INFO L226 Difference]: Without dead ends: 5996 [2019-10-13 18:06:41,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2019-10-13 18:06:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5968. [2019-10-13 18:06:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5968 states. [2019-10-13 18:06:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7680 transitions. [2019-10-13 18:06:41,625 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 7680 transitions. Word has length 412 [2019-10-13 18:06:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:41,635 INFO L462 AbstractCegarLoop]: Abstraction has 5968 states and 7680 transitions. [2019-10-13 18:06:41,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 7680 transitions. [2019-10-13 18:06:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2019-10-13 18:06:41,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:41,656 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:41,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:41,862 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:41,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:41,862 INFO L82 PathProgramCache]: Analyzing trace with hash -330925460, now seen corresponding path program 1 times [2019-10-13 18:06:41,862 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:41,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792914737] [2019-10-13 18:06:41,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:41,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:41,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 233 proven. 114 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-13 18:06:42,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792914737] [2019-10-13 18:06:42,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283793961] [2019-10-13 18:06:42,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:43,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:43,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 421 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 18:06:43,291 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:43,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:43,292 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916836272] [2019-10-13 18:06:43,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:43,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:43,294 INFO L87 Difference]: Start difference. First operand 5968 states and 7680 transitions. Second operand 11 states.