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/Problem03_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:50,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:50,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:50,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:50,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:50,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:50,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:50,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:50,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:50,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:50,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:50,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:50,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:50,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:50,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:50,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:50,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:50,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:50,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:50,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:50,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:50,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:50,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:50,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:50,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:54:50,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:54:50,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:54:50,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:54:50,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:54:50,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:54:50,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:50,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:50,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:50,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:50,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:50,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:50,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:50,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:50,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:50,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:50,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:50,985 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 21:54:51,004 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:51,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:51,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:51,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:51,007 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:51,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:51,008 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:51,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:51,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:51,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:51,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:51,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:51,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:51,010 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:51,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:51,011 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:51,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:51,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:51,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:51,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:51,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:51,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:51,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:51,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:51,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:51,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:51,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:51,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:51,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:51,287 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:51,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:51,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:51,305 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:51,306 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:51,307 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2019-10-14 21:54:51,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc10e8d2/bc97fa2314864301b898fe71c42e91ff/FLAG7f880ec28 [2019-10-14 21:54:52,054 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:52,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2019-10-14 21:54:52,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc10e8d2/bc97fa2314864301b898fe71c42e91ff/FLAG7f880ec28 [2019-10-14 21:54:52,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc10e8d2/bc97fa2314864301b898fe71c42e91ff [2019-10-14 21:54:52,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:52,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:52,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:52,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:52,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:52,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:52" (1/1) ... [2019-10-14 21:54:52,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bea9702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:52, skipping insertion in model container [2019-10-14 21:54:52,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:52" (1/1) ... [2019-10-14 21:54:52,249 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:52,336 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:53,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:53,115 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:53,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:53,487 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:53,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53 WrapperNode [2019-10-14 21:54:53,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:53,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:53,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:53,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:53,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (1/1) ... [2019-10-14 21:54:53,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (1/1) ... [2019-10-14 21:54:53,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (1/1) ... [2019-10-14 21:54:53,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (1/1) ... [2019-10-14 21:54:53,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (1/1) ... [2019-10-14 21:54:53,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (1/1) ... [2019-10-14 21:54:53,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (1/1) ... [2019-10-14 21:54:53,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:53,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:53,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:53,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:53,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (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 21:54:53,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:53,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:53,792 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:53,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:55,785 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:55,786 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:55,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:55 BoogieIcfgContainer [2019-10-14 21:54:55,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:55,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:55,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:55,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:55,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:52" (1/3) ... [2019-10-14 21:54:55,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b0102d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:55, skipping insertion in model container [2019-10-14 21:54:55,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:53" (2/3) ... [2019-10-14 21:54:55,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b0102d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:55, skipping insertion in model container [2019-10-14 21:54:55,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:55" (3/3) ... [2019-10-14 21:54:55,815 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label43.c [2019-10-14 21:54:55,830 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:55,844 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:55,860 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:55,914 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:55,914 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:55,917 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:55,917 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:55,917 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:55,918 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:55,918 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:55,918 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 21:54:55,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:55,981 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:55,984 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1933795261, now seen corresponding path program 1 times [2019-10-14 21:54:56,001 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:56,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740774693] [2019-10-14 21:54:56,002 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:56,002 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:56,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:56,997 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,158 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 21:54:57,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740774693] [2019-10-14 21:54:57,160 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:57,160 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:57,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695378024] [2019-10-14 21:54:57,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:57,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:57,182 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:57,397 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:57,901 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-14 21:55:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:01,284 INFO L93 Difference]: Finished difference Result 1074 states and 1940 transitions. [2019-10-14 21:55:01,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:01,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-14 21:55:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:01,309 INFO L225 Difference]: With dead ends: 1074 [2019-10-14 21:55:01,310 INFO L226 Difference]: Without dead ends: 695 [2019-10-14 21:55:01,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2019-10-14 21:55:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 469. [2019-10-14 21:55:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-14 21:55:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 754 transitions. [2019-10-14 21:55:01,441 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 754 transitions. Word has length 156 [2019-10-14 21:55:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:01,442 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 754 transitions. [2019-10-14 21:55:01,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 754 transitions. [2019-10-14 21:55:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-14 21:55:01,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:01,448 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:55:01,449 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2055560806, now seen corresponding path program 1 times [2019-10-14 21:55:01,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:01,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177601710] [2019-10-14 21:55:01,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:01,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:01,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:01,722 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:01,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177601710] [2019-10-14 21:55:01,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:01,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:55:01,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098285030] [2019-10-14 21:55:01,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:55:01,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:55:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:55:01,913 INFO L87 Difference]: Start difference. First operand 469 states and 754 transitions. Second operand 8 states. [2019-10-14 21:55:02,077 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:05,009 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:05,584 INFO L93 Difference]: Finished difference Result 1416 states and 2364 transitions. [2019-10-14 21:55:05,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:55:05,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 165 [2019-10-14 21:55:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:05,594 INFO L225 Difference]: With dead ends: 1416 [2019-10-14 21:55:05,595 INFO L226 Difference]: Without dead ends: 953 [2019-10-14 21:55:05,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:55:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2019-10-14 21:55:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 908. [2019-10-14 21:55:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-10-14 21:55:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1450 transitions. [2019-10-14 21:55:05,668 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1450 transitions. Word has length 165 [2019-10-14 21:55:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:05,669 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1450 transitions. [2019-10-14 21:55:05,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:55:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1450 transitions. [2019-10-14 21:55:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:55:05,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:05,674 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:55:05,674 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1409737428, now seen corresponding path program 1 times [2019-10-14 21:55:05,675 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:05,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713237565] [2019-10-14 21:55:05,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:05,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:05,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:05,928 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:06,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713237565] [2019-10-14 21:55:06,168 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:06,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:55:06,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266789312] [2019-10-14 21:55:06,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:55:06,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:55:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:55:06,183 INFO L87 Difference]: Start difference. First operand 908 states and 1450 transitions. Second operand 8 states. [2019-10-14 21:55:06,348 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:06,664 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:07,058 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:10,931 INFO L93 Difference]: Finished difference Result 3573 states and 5961 transitions. [2019-10-14 21:55:10,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:55:10,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2019-10-14 21:55:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:10,953 INFO L225 Difference]: With dead ends: 3573 [2019-10-14 21:55:10,954 INFO L226 Difference]: Without dead ends: 2671 [2019-10-14 21:55:10,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:55:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2019-10-14 21:55:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2636. [2019-10-14 21:55:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-10-14 21:55:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 4004 transitions. [2019-10-14 21:55:11,091 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 4004 transitions. Word has length 166 [2019-10-14 21:55:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:11,093 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 4004 transitions. [2019-10-14 21:55:11,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:55:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 4004 transitions. [2019-10-14 21:55:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 21:55:11,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:11,104 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:55:11,104 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:11,105 INFO L82 PathProgramCache]: Analyzing trace with hash 986588969, now seen corresponding path program 1 times [2019-10-14 21:55:11,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:11,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615280710] [2019-10-14 21:55:11,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:11,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:11,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:11,441 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:11,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615280710] [2019-10-14 21:55:11,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126915843] [2019-10-14 21:55:11,650 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 21:55:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:11,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:11,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:11,948 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:11,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:55:11,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425699995] [2019-10-14 21:55:11,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:11,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:11,950 INFO L87 Difference]: Start difference. First operand 2636 states and 4004 transitions. Second operand 3 states. [2019-10-14 21:55:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:13,151 INFO L93 Difference]: Finished difference Result 7809 states and 12194 transitions. [2019-10-14 21:55:13,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:13,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2019-10-14 21:55:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:13,181 INFO L225 Difference]: With dead ends: 7809 [2019-10-14 21:55:13,181 INFO L226 Difference]: Without dead ends: 5179 [2019-10-14 21:55:13,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2019-10-14 21:55:13,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 5176. [2019-10-14 21:55:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5176 states. [2019-10-14 21:55:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 7198 transitions. [2019-10-14 21:55:13,422 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 7198 transitions. Word has length 168 [2019-10-14 21:55:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:13,423 INFO L462 AbstractCegarLoop]: Abstraction has 5176 states and 7198 transitions. [2019-10-14 21:55:13,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 7198 transitions. [2019-10-14 21:55:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-14 21:55:13,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:13,437 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:55:13,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:13,651 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:13,652 INFO L82 PathProgramCache]: Analyzing trace with hash 561992701, now seen corresponding path program 1 times [2019-10-14 21:55:13,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:13,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977332229] [2019-10-14 21:55:13,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:13,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:13,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:13,945 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:14,080 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:55:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:14,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977332229] [2019-10-14 21:55:14,208 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:14,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:14,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575696740] [2019-10-14 21:55:14,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:14,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:14,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:14,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:14,210 INFO L87 Difference]: Start difference. First operand 5176 states and 7198 transitions. Second operand 9 states. [2019-10-14 21:55:14,379 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:17,710 INFO L93 Difference]: Finished difference Result 15757 states and 24234 transitions. [2019-10-14 21:55:17,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:55:17,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-10-14 21:55:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:17,793 INFO L225 Difference]: With dead ends: 15757 [2019-10-14 21:55:17,794 INFO L226 Difference]: Without dead ends: 10587 [2019-10-14 21:55:17,820 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:55:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2019-10-14 21:55:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 10365. [2019-10-14 21:55:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10365 states. [2019-10-14 21:55:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10365 states to 10365 states and 14905 transitions. [2019-10-14 21:55:18,355 INFO L78 Accepts]: Start accepts. Automaton has 10365 states and 14905 transitions. Word has length 174 [2019-10-14 21:55:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:18,356 INFO L462 AbstractCegarLoop]: Abstraction has 10365 states and 14905 transitions. [2019-10-14 21:55:18,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 10365 states and 14905 transitions. [2019-10-14 21:55:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 21:55:18,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:18,383 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:18,387 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:18,387 INFO L82 PathProgramCache]: Analyzing trace with hash 642664422, now seen corresponding path program 1 times [2019-10-14 21:55:18,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:18,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415204130] [2019-10-14 21:55:18,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:18,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:18,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:18,572 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:18,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415204130] [2019-10-14 21:55:18,742 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:18,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:18,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738551883] [2019-10-14 21:55:18,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:18,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:18,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:18,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:18,744 INFO L87 Difference]: Start difference. First operand 10365 states and 14905 transitions. Second operand 9 states. [2019-10-14 21:55:18,890 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:19,489 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:19,968 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:23,839 INFO L93 Difference]: Finished difference Result 39827 states and 61400 transitions. [2019-10-14 21:55:23,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:55:23,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-10-14 21:55:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:23,996 INFO L225 Difference]: With dead ends: 39827 [2019-10-14 21:55:23,997 INFO L226 Difference]: Without dead ends: 29468 [2019-10-14 21:55:24,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:55:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29468 states.