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_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:00,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:00,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:00,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:00,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:00,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:00,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:00,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:00,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:00,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:00,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:00,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:00,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:00,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:00,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:00,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:00,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:00,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:00,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:00,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:00,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:00,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:00,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:00,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:00,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:00,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:00,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:00,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:00,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:00,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:00,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:00,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:00,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:00,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:00,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:00,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:00,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:04:01,026 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:01,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:01,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:01,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:01,028 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:01,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:01,030 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:01,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:01,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:01,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:01,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:01,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:01,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:01,032 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:01,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:01,032 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:01,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:01,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:01,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:01,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:01,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:01,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:01,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:01,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:01,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:01,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:01,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:01,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:01,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:01,313 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:01,331 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:01,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:01,337 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:01,337 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:01,338 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-10-14 22:04:01,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19160aed4/b558fdf3e49748dfbc5eed44216921fc/FLAG91fccdb46 [2019-10-14 22:04:02,114 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:02,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-10-14 22:04:02,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19160aed4/b558fdf3e49748dfbc5eed44216921fc/FLAG91fccdb46 [2019-10-14 22:04:02,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19160aed4/b558fdf3e49748dfbc5eed44216921fc [2019-10-14 22:04:02,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:02,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:02,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:02,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:02,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:02,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:02" (1/1) ... [2019-10-14 22:04:02,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19511e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:02, skipping insertion in model container [2019-10-14 22:04:02,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:02" (1/1) ... [2019-10-14 22:04:02,300 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:02,381 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:03,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:03,291 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:03,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:03,655 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:03,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03 WrapperNode [2019-10-14 22:04:03,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:03,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:03,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:03,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:03,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (1/1) ... [2019-10-14 22:04:03,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (1/1) ... [2019-10-14 22:04:03,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (1/1) ... [2019-10-14 22:04:03,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (1/1) ... [2019-10-14 22:04:03,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (1/1) ... [2019-10-14 22:04:03,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (1/1) ... [2019-10-14 22:04:03,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (1/1) ... [2019-10-14 22:04:03,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:03,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:03,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:03,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:03,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:03,925 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:03,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:03,927 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:03,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:03,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:03,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:06,284 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:06,285 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:06,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:06 BoogieIcfgContainer [2019-10-14 22:04:06,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:06,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:06,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:06,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:06,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:02" (1/3) ... [2019-10-14 22:04:06,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b30401d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:06, skipping insertion in model container [2019-10-14 22:04:06,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:03" (2/3) ... [2019-10-14 22:04:06,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b30401d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:06, skipping insertion in model container [2019-10-14 22:04:06,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:06" (3/3) ... [2019-10-14 22:04:06,310 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label19.c [2019-10-14 22:04:06,323 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:06,333 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:06,345 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:06,384 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:06,385 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:06,385 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:06,385 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:06,385 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:06,385 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:06,385 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:06,386 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 22:04:06,435 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:06,436 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] [2019-10-14 22:04:06,438 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1232696998, now seen corresponding path program 1 times [2019-10-14 22:04:06,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:06,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264143982] [2019-10-14 22:04:06,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:06,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:06,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:06,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264143982] [2019-10-14 22:04:06,888 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:06,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:06,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035797016] [2019-10-14 22:04:06,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:06,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:06,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:06,912 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:11,847 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-10-14 22:04:11,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:11,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2019-10-14 22:04:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:11,878 INFO L225 Difference]: With dead ends: 1530 [2019-10-14 22:04:11,878 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:11,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-10-14 22:04:12,015 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 49 [2019-10-14 22:04:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:12,016 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-10-14 22:04:12,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-10-14 22:04:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 22:04:12,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:12,026 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:12,027 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash -768303897, now seen corresponding path program 1 times [2019-10-14 22:04:12,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:12,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398445100] [2019-10-14 22:04:12,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:12,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:12,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:12,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398445100] [2019-10-14 22:04:12,315 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:12,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:04:12,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436917861] [2019-10-14 22:04:12,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:04:12,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:04:12,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:04:12,322 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-10-14 22:04:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:16,002 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-10-14 22:04:16,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:04:16,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-10-14 22:04:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:16,023 INFO L225 Difference]: With dead ends: 3125 [2019-10-14 22:04:16,024 INFO L226 Difference]: Without dead ends: 2100 [2019-10-14 22:04:16,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:04:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-14 22:04:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-10-14 22:04:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-10-14 22:04:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-10-14 22:04:16,112 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 118 [2019-10-14 22:04:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:16,112 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-10-14 22:04:16,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:04:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-10-14 22:04:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 22:04:16,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:16,116 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:16,116 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash -825960706, now seen corresponding path program 1 times [2019-10-14 22:04:16,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:16,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133211906] [2019-10-14 22:04:16,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:16,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:16,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:16,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133211906] [2019-10-14 22:04:16,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:16,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:16,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377803579] [2019-10-14 22:04:16,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:16,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:16,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:16,351 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-10-14 22:04:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:21,564 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-10-14 22:04:21,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:04:21,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2019-10-14 22:04:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:21,584 INFO L225 Difference]: With dead ends: 4170 [2019-10-14 22:04:21,585 INFO L226 Difference]: Without dead ends: 2792 [2019-10-14 22:04:21,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:04:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-10-14 22:04:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-10-14 22:04:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-10-14 22:04:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3896 transitions. [2019-10-14 22:04:21,694 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3896 transitions. Word has length 121 [2019-10-14 22:04:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:21,697 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3896 transitions. [2019-10-14 22:04:21,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3896 transitions. [2019-10-14 22:04:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 22:04:21,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:21,705 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:21,705 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:21,706 INFO L82 PathProgramCache]: Analyzing trace with hash -388481722, now seen corresponding path program 1 times [2019-10-14 22:04:21,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:21,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765083404] [2019-10-14 22:04:21,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:21,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765083404] [2019-10-14 22:04:21,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:21,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:21,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188165366] [2019-10-14 22:04:21,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:21,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:21,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:21,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:21,928 INFO L87 Difference]: Start difference. First operand 2773 states and 3896 transitions. Second operand 9 states. [2019-10-14 22:04:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:27,593 INFO L93 Difference]: Finished difference Result 9052 states and 13211 transitions. [2019-10-14 22:04:27,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:04:27,594 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-10-14 22:04:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:27,632 INFO L225 Difference]: With dead ends: 9052 [2019-10-14 22:04:27,632 INFO L226 Difference]: Without dead ends: 6285 [2019-10-14 22:04:27,642 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:04:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2019-10-14 22:04:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6259. [2019-10-14 22:04:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6259 states. [2019-10-14 22:04:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8351 transitions. [2019-10-14 22:04:27,900 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8351 transitions. Word has length 125 [2019-10-14 22:04:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:27,902 INFO L462 AbstractCegarLoop]: Abstraction has 6259 states and 8351 transitions. [2019-10-14 22:04:27,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8351 transitions. [2019-10-14 22:04:27,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 22:04:27,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:27,906 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:27,906 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:27,907 INFO L82 PathProgramCache]: Analyzing trace with hash -358644173, now seen corresponding path program 1 times [2019-10-14 22:04:27,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:27,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825988333] [2019-10-14 22:04:27,910 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:27,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:27,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:28,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825988333] [2019-10-14 22:04:28,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371907085] [2019-10-14 22:04:28,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:28,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:28,446 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:28,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:04:28,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897175737] [2019-10-14 22:04:28,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:04:28,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:28,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:04:28,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:28,449 INFO L87 Difference]: Start difference. First operand 6259 states and 8351 transitions. Second operand 3 states. [2019-10-14 22:04:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:30,025 INFO L93 Difference]: Finished difference Result 14553 states and 19735 transitions. [2019-10-14 22:04:30,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:04:30,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-14 22:04:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:30,068 INFO L225 Difference]: With dead ends: 14553 [2019-10-14 22:04:30,068 INFO L226 Difference]: Without dead ends: 8300 [2019-10-14 22:04:30,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8300 states. [2019-10-14 22:04:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8300 to 8300. [2019-10-14 22:04:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8300 states. [2019-10-14 22:04:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8300 states to 8300 states and 10767 transitions. [2019-10-14 22:04:30,320 INFO L78 Accepts]: Start accepts. Automaton has 8300 states and 10767 transitions. Word has length 140 [2019-10-14 22:04:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:30,321 INFO L462 AbstractCegarLoop]: Abstraction has 8300 states and 10767 transitions. [2019-10-14 22:04:30,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:04:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 8300 states and 10767 transitions. [2019-10-14 22:04:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2019-10-14 22:04:30,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:30,349 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:30,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:30,555 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -473938833, now seen corresponding path program 1 times [2019-10-14 22:04:30,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:30,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999172589] [2019-10-14 22:04:30,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:30,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:30,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 207 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 22:04:31,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999172589] [2019-10-14 22:04:31,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487157792] [2019-10-14 22:04:31,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:31,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:31,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-14 22:04:31,842 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:31,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:04:31,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147385701] [2019-10-14 22:04:31,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:31,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:31,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:31,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:31,845 INFO L87 Difference]: Start difference. First operand 8300 states and 10767 transitions. Second operand 11 states. [2019-10-14 22:04:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:36,352 INFO L93 Difference]: Finished difference Result 21056 states and 27884 transitions. [2019-10-14 22:04:36,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:04:36,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 524 [2019-10-14 22:04:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:36,415 INFO L225 Difference]: With dead ends: 21056 [2019-10-14 22:04:36,415 INFO L226 Difference]: Without dead ends: 10997 [2019-10-14 22:04:36,446 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 533 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:04:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10997 states. [2019-10-14 22:04:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10997 to 8933. [2019-10-14 22:04:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8933 states. [2019-10-14 22:04:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8933 states to 8933 states and 10042 transitions. [2019-10-14 22:04:36,755 INFO L78 Accepts]: Start accepts. Automaton has 8933 states and 10042 transitions. Word has length 524 [2019-10-14 22:04:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:36,756 INFO L462 AbstractCegarLoop]: Abstraction has 8933 states and 10042 transitions. [2019-10-14 22:04:36,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:04:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 8933 states and 10042 transitions. [2019-10-14 22:04:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2019-10-14 22:04:36,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:36,789 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:37,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:37,004 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2124937089, now seen corresponding path program 1 times [2019-10-14 22:04:37,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:37,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363617792] [2019-10-14 22:04:37,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:37,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:37,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 273 proven. 240 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-10-14 22:04:38,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363617792] [2019-10-14 22:04:38,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880136427] [2019-10-14 22:04:38,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:38,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:38,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 685 proven. 2 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-14 22:04:38,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:38,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:04:38,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999984185] [2019-10-14 22:04:38,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:04:38,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:04:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:38,620 INFO L87 Difference]: Start difference. First operand 8933 states and 10042 transitions. Second operand 12 states.