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/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:01:56,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:01:56,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:01:56,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:01:56,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:01:56,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:01:56,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:01:56,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:01:56,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:01:56,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:01:56,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:01:56,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:01:56,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:01:56,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:01:56,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:01:56,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:01:56,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:01:56,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:01:56,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:01:56,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:01:56,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:01:56,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:01:56,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:01:56,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:01:56,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:01:56,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:01:56,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:01:56,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:01:56,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:01:56,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:01:56,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:01:56,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:01:56,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:01:56,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:01:56,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:01:56,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:01:56,349 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 18:01:56,367 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:01:56,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:01:56,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:01:56,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:01:56,369 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:01:56,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:01:56,369 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:01:56,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:01:56,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:01:56,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:01:56,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:01:56,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:01:56,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:01:56,371 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:01:56,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:01:56,371 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:01:56,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:01:56,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:01:56,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:01:56,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:01:56,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:01:56,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:56,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:01:56,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:01:56,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:01:56,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:01:56,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:01:56,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:01:56,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:01:56,644 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:01:56,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:01:56,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:01:56,660 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:01:56,661 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:01:56,662 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-10-13 18:01:56,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc255495e/5c6cbf8f887e4b1da2bd8e3fef4a95d7/FLAG726a52123 [2019-10-13 18:01:57,491 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:01:57,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-10-13 18:01:57,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc255495e/5c6cbf8f887e4b1da2bd8e3fef4a95d7/FLAG726a52123 [2019-10-13 18:01:58,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc255495e/5c6cbf8f887e4b1da2bd8e3fef4a95d7 [2019-10-13 18:01:58,049 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:01:58,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:01:58,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:58,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:01:58,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:01:58,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:58" (1/1) ... [2019-10-13 18:01:58,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166b0bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:58, skipping insertion in model container [2019-10-13 18:01:58,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:58" (1/1) ... [2019-10-13 18:01:58,069 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:01:58,251 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:01:59,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:00,006 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:00,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:00,842 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:00,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00 WrapperNode [2019-10-13 18:02:00,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:00,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:00,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:00,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:00,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (1/1) ... [2019-10-13 18:02:00,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (1/1) ... [2019-10-13 18:02:00,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (1/1) ... [2019-10-13 18:02:00,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (1/1) ... [2019-10-13 18:02:01,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (1/1) ... [2019-10-13 18:02:01,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (1/1) ... [2019-10-13 18:02:01,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (1/1) ... [2019-10-13 18:02:01,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:01,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:01,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:01,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:01,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (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 18:02:01,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:01,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:01,267 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:01,268 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:02:01,268 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:02:01,269 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 18:02:01,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:02:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:02:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 18:02:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:07,815 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:07,815 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:07,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:07 BoogieIcfgContainer [2019-10-13 18:02:07,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:07,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:07,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:07,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:07,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:01:58" (1/3) ... [2019-10-13 18:02:07,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2e8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:07, skipping insertion in model container [2019-10-13 18:02:07,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:00" (2/3) ... [2019-10-13 18:02:07,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2e8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:07, skipping insertion in model container [2019-10-13 18:02:07,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:07" (3/3) ... [2019-10-13 18:02:07,837 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2019-10-13 18:02:07,861 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:07,873 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:07,886 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:07,928 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:07,928 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:07,928 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:07,928 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:07,928 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:07,929 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:07,929 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:07,929 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-10-13 18:02:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 18:02:07,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:07,987 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] [2019-10-13 18:02:07,989 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1527050992, now seen corresponding path program 1 times [2019-10-13 18:02:08,003 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:08,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976291379] [2019-10-13 18:02:08,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:08,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:08,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:08,507 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 18:02:08,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976291379] [2019-10-13 18:02:08,509 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:08,510 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:08,510 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4246164] [2019-10-13 18:02:08,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:08,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:08,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:08,533 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 5 states. [2019-10-13 18:02:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:22,609 INFO L93 Difference]: Finished difference Result 4003 states and 7445 transitions. [2019-10-13 18:02:22,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:22,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-10-13 18:02:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:22,647 INFO L225 Difference]: With dead ends: 4003 [2019-10-13 18:02:22,647 INFO L226 Difference]: Without dead ends: 2795 [2019-10-13 18:02:22,659 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 [2019-10-13 18:02:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2019-10-13 18:02:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2774. [2019-10-13 18:02:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2774 states. [2019-10-13 18:02:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 4739 transitions. [2019-10-13 18:02:22,858 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 4739 transitions. Word has length 61 [2019-10-13 18:02:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:22,859 INFO L462 AbstractCegarLoop]: Abstraction has 2774 states and 4739 transitions. [2019-10-13 18:02:22,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 4739 transitions. [2019-10-13 18:02:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 18:02:22,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:22,870 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, 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] [2019-10-13 18:02:22,870 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:22,871 INFO L82 PathProgramCache]: Analyzing trace with hash 430477289, now seen corresponding path program 1 times [2019-10-13 18:02:22,872 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:22,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878174248] [2019-10-13 18:02:22,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:23,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878174248] [2019-10-13 18:02:23,328 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:23,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:23,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949831421] [2019-10-13 18:02:23,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:23,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:23,331 INFO L87 Difference]: Start difference. First operand 2774 states and 4739 transitions. Second operand 8 states.