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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:48,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:48,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:48,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:48,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:48,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:48,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:48,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:48,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:48,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:48,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:48,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:48,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:48,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:48,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:48,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:48,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:48,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:48,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:48,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:48,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:48,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:48,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:48,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:48,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:05:48,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:48,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:48,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:48,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:48,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:48,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:48,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:48,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:48,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:48,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:48,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:48,725 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 20:05:48,747 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:48,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:48,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:48,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:48,751 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:48,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:48,751 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:48,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:48,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:48,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:48,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:48,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:48,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:48,754 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:48,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:48,754 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:48,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:48,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:48,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:48,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:48,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:48,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:48,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:48,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:48,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:48,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:48,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:48,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:48,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:05:49,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:49,056 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:49,061 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:49,063 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:49,063 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:49,064 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label30.c [2019-10-13 20:05:49,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36c2caf71/9600468582e14d34940a0af00c13f421/FLAG277926341 [2019-10-13 20:05:49,991 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:49,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label30.c [2019-10-13 20:05:50,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36c2caf71/9600468582e14d34940a0af00c13f421/FLAG277926341 [2019-10-13 20:05:50,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36c2caf71/9600468582e14d34940a0af00c13f421 [2019-10-13 20:05:50,521 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:50,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:50,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:50,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:50,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:50,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:50" (1/1) ... [2019-10-13 20:05:50,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ca977a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:50, skipping insertion in model container [2019-10-13 20:05:50,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:50" (1/1) ... [2019-10-13 20:05:50,542 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:50,695 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:52,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:52,274 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:53,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:53,091 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:53,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53 WrapperNode [2019-10-13 20:05:53,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:53,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:53,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:53,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:53,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (1/1) ... [2019-10-13 20:05:53,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (1/1) ... [2019-10-13 20:05:53,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (1/1) ... [2019-10-13 20:05:53,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (1/1) ... [2019-10-13 20:05:53,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (1/1) ... [2019-10-13 20:05:53,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (1/1) ... [2019-10-13 20:05:53,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (1/1) ... [2019-10-13 20:05:53,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:53,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:53,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:53,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:53,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:53,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:53,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:53,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:53,496 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:05:53,496 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:05:53,496 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 20:05:53,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:53,497 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:53,497 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:05:53,497 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:05:53,497 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 20:05:53,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:53,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:53,498 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:53,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:53,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:53,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:58,337 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:58,337 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:58,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:58 BoogieIcfgContainer [2019-10-13 20:05:58,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:58,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:58,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:58,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:58,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:50" (1/3) ... [2019-10-13 20:05:58,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8c38d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:58, skipping insertion in model container [2019-10-13 20:05:58,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:53" (2/3) ... [2019-10-13 20:05:58,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8c38d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:58, skipping insertion in model container [2019-10-13 20:05:58,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:58" (3/3) ... [2019-10-13 20:05:58,357 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label30.c [2019-10-13 20:05:58,375 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:58,389 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:58,403 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:58,447 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:58,447 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:58,447 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:58,447 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:58,447 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:58,448 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:58,448 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:58,448 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 20:05:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 20:05:58,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:58,493 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] [2019-10-13 20:05:58,495 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1416358702, now seen corresponding path program 1 times [2019-10-13 20:05:58,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:58,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003819387] [2019-10-13 20:05:58,514 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:58,514 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:58,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:58,833 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 20:05:58,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003819387] [2019-10-13 20:05:58,834 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:58,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:58,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717051959] [2019-10-13 20:05:58,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:58,842 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:58,860 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 4 states. [2019-10-13 20:06:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:07,159 INFO L93 Difference]: Finished difference Result 3230 states and 6251 transitions. [2019-10-13 20:06:07,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:07,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-10-13 20:06:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:07,198 INFO L225 Difference]: With dead ends: 3230 [2019-10-13 20:06:07,198 INFO L226 Difference]: Without dead ends: 2309 [2019-10-13 20:06:07,208 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-10-13 20:06:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2019-10-13 20:06:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-10-13 20:06:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3659 transitions. [2019-10-13 20:06:07,379 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3659 transitions. Word has length 31 [2019-10-13 20:06:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:07,381 INFO L462 AbstractCegarLoop]: Abstraction has 2309 states and 3659 transitions. [2019-10-13 20:06:07,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3659 transitions. [2019-10-13 20:06:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 20:06:07,390 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:07,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:07,391 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:07,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1680241966, now seen corresponding path program 1 times [2019-10-13 20:06:07,393 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:07,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644868166] [2019-10-13 20:06:07,394 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:07,394 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:07,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:07,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644868166] [2019-10-13 20:06:07,778 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:07,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:07,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270100365] [2019-10-13 20:06:07,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:07,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:07,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:07,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:07,784 INFO L87 Difference]: Start difference. First operand 2309 states and 3659 transitions. Second operand 6 states. [2019-10-13 20:06:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:14,523 INFO L93 Difference]: Finished difference Result 7051 states and 11329 transitions. [2019-10-13 20:06:14,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:14,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2019-10-13 20:06:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:14,559 INFO L225 Difference]: With dead ends: 7051 [2019-10-13 20:06:14,560 INFO L226 Difference]: Without dead ends: 4748 [2019-10-13 20:06:14,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:06:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2019-10-13 20:06:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 4707. [2019-10-13 20:06:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4707 states. [2019-10-13 20:06:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4707 states to 4707 states and 7110 transitions. [2019-10-13 20:06:14,785 INFO L78 Accepts]: Start accepts. Automaton has 4707 states and 7110 transitions. Word has length 111 [2019-10-13 20:06:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:14,786 INFO L462 AbstractCegarLoop]: Abstraction has 4707 states and 7110 transitions. [2019-10-13 20:06:14,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4707 states and 7110 transitions. [2019-10-13 20:06:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 20:06:14,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:14,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:14,800 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1139503550, now seen corresponding path program 1 times [2019-10-13 20:06:14,802 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:14,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3475706] [2019-10-13 20:06:14,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:14,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:14,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:15,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3475706] [2019-10-13 20:06:15,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:15,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:15,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482619032] [2019-10-13 20:06:15,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:15,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:15,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:15,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:15,095 INFO L87 Difference]: Start difference. First operand 4707 states and 7110 transitions. Second operand 6 states. [2019-10-13 20:06:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:21,407 INFO L93 Difference]: Finished difference Result 14344 states and 22538 transitions. [2019-10-13 20:06:21,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:21,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-13 20:06:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:21,471 INFO L225 Difference]: With dead ends: 14344 [2019-10-13 20:06:21,472 INFO L226 Difference]: Without dead ends: 9643 [2019-10-13 20:06:21,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:06:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9643 states. [2019-10-13 20:06:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9643 to 9566. [2019-10-13 20:06:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9566 states. [2019-10-13 20:06:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9566 states to 9566 states and 14513 transitions. [2019-10-13 20:06:21,837 INFO L78 Accepts]: Start accepts. Automaton has 9566 states and 14513 transitions. Word has length 119 [2019-10-13 20:06:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:21,840 INFO L462 AbstractCegarLoop]: Abstraction has 9566 states and 14513 transitions. [2019-10-13 20:06:21,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9566 states and 14513 transitions. [2019-10-13 20:06:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 20:06:21,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:21,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:21,843 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1285051767, now seen corresponding path program 1 times [2019-10-13 20:06:21,844 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:21,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537903075] [2019-10-13 20:06:21,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:21,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:21,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:22,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537903075] [2019-10-13 20:06:22,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:22,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:22,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273434042] [2019-10-13 20:06:22,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:22,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:22,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:22,074 INFO L87 Difference]: Start difference. First operand 9566 states and 14513 transitions. Second operand 6 states.