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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:02,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:02,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:02,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:02,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:02,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:02,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:02,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:02,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:02,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:02,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:02,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:02,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:02,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:02,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:02,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:02,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:02,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:02,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:02,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:02,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:02,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:02,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:02,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:02,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:06:03,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:03,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:03,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:03,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:03,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:03,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:03,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:03,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:03,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:03,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:03,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:03,015 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 18:06:03,040 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:03,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:03,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:03,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:03,043 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:03,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:03,044 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:03,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:03,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:03,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:03,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:03,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:03,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:03,046 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:03,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:03,047 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:03,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:03,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:03,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:03,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:03,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:03,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:03,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:03,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:03,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:03,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:03,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:03,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:03,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:03,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:03,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:03,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:03,400 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:03,401 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:03,401 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-13 18:06:03,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f46f2efa/e808c095eb8b434ab003899982b4c3e8/FLAGea226d545 [2019-10-13 18:06:04,151 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:04,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-13 18:06:04,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f46f2efa/e808c095eb8b434ab003899982b4c3e8/FLAGea226d545 [2019-10-13 18:06:04,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f46f2efa/e808c095eb8b434ab003899982b4c3e8 [2019-10-13 18:06:04,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:04,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:04,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:04,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:04,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:04,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:04" (1/1) ... [2019-10-13 18:06:04,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599a6431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:04, skipping insertion in model container [2019-10-13 18:06:04,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:04" (1/1) ... [2019-10-13 18:06:04,348 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:04,428 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:05,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:05,234 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:05,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:05,864 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:05,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05 WrapperNode [2019-10-13 18:06:05,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:05,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:05,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:05,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:05,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (1/1) ... [2019-10-13 18:06:05,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (1/1) ... [2019-10-13 18:06:05,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (1/1) ... [2019-10-13 18:06:05,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (1/1) ... [2019-10-13 18:06:06,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (1/1) ... [2019-10-13 18:06:06,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (1/1) ... [2019-10-13 18:06:06,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (1/1) ... [2019-10-13 18:06:06,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:06,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:06,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:06,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:06,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (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 18:06:06,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:06,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:06,161 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:06,161 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:06,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:08,672 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:08,673 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:08,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:08 BoogieIcfgContainer [2019-10-13 18:06:08,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:08,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:08,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:08,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:08,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:04" (1/3) ... [2019-10-13 18:06:08,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f9d401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:08, skipping insertion in model container [2019-10-13 18:06:08,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:05" (2/3) ... [2019-10-13 18:06:08,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f9d401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:08, skipping insertion in model container [2019-10-13 18:06:08,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:08" (3/3) ... [2019-10-13 18:06:08,698 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label55.c [2019-10-13 18:06:08,709 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:08,722 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:08,735 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:08,781 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:08,782 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:08,783 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:08,783 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:08,783 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:08,783 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:08,783 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:08,783 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:06:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 18:06:08,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:08,835 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] [2019-10-13 18:06:08,837 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1859248590, now seen corresponding path program 1 times [2019-10-13 18:06:08,854 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:08,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938863819] [2019-10-13 18:06:08,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:08,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:08,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:09,296 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 18:06:09,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938863819] [2019-10-13 18:06:09,298 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:09,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:09,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931529385] [2019-10-13 18:06:09,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:09,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:09,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:09,353 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:06:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:15,485 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:06:15,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:15,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 18:06:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:15,514 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:06:15,514 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:06:15,525 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 18:06:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:06:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:06:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:06:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-10-13 18:06:15,648 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 63 [2019-10-13 18:06:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:15,649 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-10-13 18:06:15,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-10-13 18:06:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 18:06:15,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:15,660 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, 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, 1, 1, 1, 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 18:06:15,660 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:15,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1694919497, now seen corresponding path program 1 times [2019-10-13 18:06:15,661 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:15,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913415059] [2019-10-13 18:06:15,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:15,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:15,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:06:16,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913415059] [2019-10-13 18:06:16,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280840286] [2019-10-13 18:06:16,154 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 18:06:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:16,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:16,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 18:06:16,408 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:16,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:06:16,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619805781] [2019-10-13 18:06:16,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:16,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:16,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:16,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:16,415 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-10-13 18:06:19,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:19,730 INFO L93 Difference]: Finished difference Result 3131 states and 5147 transitions. [2019-10-13 18:06:19,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:06:19,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-10-13 18:06:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:19,749 INFO L225 Difference]: With dead ends: 3131 [2019-10-13 18:06:19,749 INFO L226 Difference]: Without dead ends: 2106 [2019-10-13 18:06:19,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 233 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 18:06:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-13 18:06:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078. [2019-10-13 18:06:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-10-13 18:06:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-10-13 18:06:19,856 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 230 [2019-10-13 18:06:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:19,860 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-10-13 18:06:19,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-10-13 18:06:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 18:06:19,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:19,872 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, 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, 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 18:06:20,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:20,079 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:20,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:20,080 INFO L82 PathProgramCache]: Analyzing trace with hash 142778751, now seen corresponding path program 1 times [2019-10-13 18:06:20,080 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:20,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772428913] [2019-10-13 18:06:20,081 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:20,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:20,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 112 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:06:20,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772428913] [2019-10-13 18:06:20,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203216558] [2019-10-13 18:06:20,491 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 18:06:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:20,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 18:06:20,663 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:20,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:20,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145587411] [2019-10-13 18:06:20,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:20,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:20,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:20,665 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-10-13 18:06:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:23,524 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-10-13 18:06:23,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:06:23,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-10-13 18:06:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:23,552 INFO L225 Difference]: With dead ends: 6302 [2019-10-13 18:06:23,552 INFO L226 Difference]: Without dead ends: 4230 [2019-10-13 18:06:23,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 234 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 18:06:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-10-13 18:06:23,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-10-13 18:06:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-10-13 18:06:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5868 transitions. [2019-10-13 18:06:23,703 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5868 transitions. Word has length 234 [2019-10-13 18:06:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:23,705 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5868 transitions. [2019-10-13 18:06:23,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5868 transitions. [2019-10-13 18:06:23,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-10-13 18:06:23,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:23,713 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, 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, 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] [2019-10-13 18:06:23,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:23,919 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash 654408271, now seen corresponding path program 1 times [2019-10-13 18:06:23,921 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:23,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535111430] [2019-10-13 18:06:23,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:23,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:23,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 249 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 18:06:24,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535111430] [2019-10-13 18:06:24,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003326461] [2019-10-13 18:06:24,421 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 18:06:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:24,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 366 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 18:06:24,804 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:24,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:06:24,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894341831] [2019-10-13 18:06:24,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:24,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:24,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:24,809 INFO L87 Difference]: Start difference. First operand 4208 states and 5868 transitions. Second operand 11 states. [2019-10-13 18:06:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:29,678 INFO L93 Difference]: Finished difference Result 10864 states and 15768 transitions. [2019-10-13 18:06:29,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:06:29,679 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 338 [2019-10-13 18:06:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:29,722 INFO L225 Difference]: With dead ends: 10864 [2019-10-13 18:06:29,723 INFO L226 Difference]: Without dead ends: 6662 [2019-10-13 18:06:29,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 345 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 18:06:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-10-13 18:06:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4930. [2019-10-13 18:06:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2019-10-13 18:06:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 6891 transitions. [2019-10-13 18:06:29,934 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 6891 transitions. Word has length 338 [2019-10-13 18:06:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:29,935 INFO L462 AbstractCegarLoop]: Abstraction has 4930 states and 6891 transitions. [2019-10-13 18:06:29,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 6891 transitions. [2019-10-13 18:06:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2019-10-13 18:06:29,945 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:29,946 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:06:30,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:30,150 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:30,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1714892967, now seen corresponding path program 1 times [2019-10-13 18:06:30,152 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:30,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741112059] [2019-10-13 18:06:30,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:30,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:30,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 168 proven. 206 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-13 18:06:30,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741112059] [2019-10-13 18:06:30,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158097011] [2019-10-13 18:06:30,804 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 18:06:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:30,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2019-10-13 18:06:31,137 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:31,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:31,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691877210] [2019-10-13 18:06:31,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:31,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:31,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:31,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:31,139 INFO L87 Difference]: Start difference. First operand 4930 states and 6891 transitions. Second operand 5 states. [2019-10-13 18:06:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:33,570 INFO L93 Difference]: Finished difference Result 11257 states and 15760 transitions. [2019-10-13 18:06:33,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:06:33,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 414 [2019-10-13 18:06:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:33,606 INFO L225 Difference]: With dead ends: 11257 [2019-10-13 18:06:33,606 INFO L226 Difference]: Without dead ends: 6333 [2019-10-13 18:06:33,620 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 416 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 18:06:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2019-10-13 18:06:33,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 6307. [2019-10-13 18:06:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6307 states. [2019-10-13 18:06:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 8081 transitions. [2019-10-13 18:06:33,793 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 8081 transitions. Word has length 414 [2019-10-13 18:06:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:33,801 INFO L462 AbstractCegarLoop]: Abstraction has 6307 states and 8081 transitions. [2019-10-13 18:06:33,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:33,802 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 8081 transitions. [2019-10-13 18:06:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2019-10-13 18:06:33,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:33,827 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:06:34,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:34,041 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash 187773675, now seen corresponding path program 1 times [2019-10-13 18:06:34,043 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:34,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014116111] [2019-10-13 18:06:34,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:34,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:34,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 284 proven. 100 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-13 18:06:35,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014116111] [2019-10-13 18:06:35,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909502694] [2019-10-13 18:06:35,060 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 18:06:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:35,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:35,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 426 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 18:06:35,443 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:35,443 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:35,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149343492] [2019-10-13 18:06:35,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:35,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:35,446 INFO L87 Difference]: Start difference. First operand 6307 states and 8081 transitions. Second operand 11 states.