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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:51:09,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:51:09,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:51:09,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:51:09,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:51:09,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:51:09,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:51:09,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:51:09,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:51:09,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:51:09,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:51:09,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:51:09,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:51:09,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:51:09,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:51:09,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:51:09,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:51:09,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:51:09,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:51:09,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:51:09,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:51:09,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:51:09,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:51:09,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:51:09,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:51:09,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:51:09,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:51:09,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:51:09,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:51:09,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:51:09,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:51:09,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:51:09,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:51:09,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:51:09,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:51:09,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:51:09,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:51:09,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:51:09,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:51:09,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:51:09,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:51:09,601 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 [2019-10-15 01:51:09,615 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:51:09,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:51:09,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:51:09,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:51:09,617 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:51:09,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:51:09,617 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:51:09,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:51:09,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:51:09,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:51:09,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:51:09,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:51:09,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:51:09,620 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:51:09,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:51:09,620 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:51:09,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:51:09,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:51:09,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:51:09,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:51:09,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:51:09,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:51:09,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:51:09,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:51:09,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:51:09,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:51:09,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:51:09,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:51:09,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:51:09,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:51:09,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:51:09,915 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:51:09,917 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:51:09,917 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:51:09,918 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2019-10-15 01:51:09,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc58a831/8eb254518ded4d27ab8dbde2146b4cf0/FLAG41b8b44de [2019-10-15 01:51:10,682 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:51:10,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2019-10-15 01:51:10,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc58a831/8eb254518ded4d27ab8dbde2146b4cf0/FLAG41b8b44de [2019-10-15 01:51:10,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc58a831/8eb254518ded4d27ab8dbde2146b4cf0 [2019-10-15 01:51:10,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:51:10,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:51:10,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:10,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:51:10,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:51:10,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:10" (1/1) ... [2019-10-15 01:51:10,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f41ddf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:10, skipping insertion in model container [2019-10-15 01:51:10,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:10" (1/1) ... [2019-10-15 01:51:10,870 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:51:11,022 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:51:12,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:12,563 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:51:13,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:13,343 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:51:13,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13 WrapperNode [2019-10-15 01:51:13,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:13,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:51:13,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:51:13,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:51:13,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:13,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:13,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:13,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:13,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:13,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:13,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:13,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:51:13,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:51:13,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:51:13,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:51:13,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (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 [2019-10-15 01:51:13,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:51:13,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:51:13,696 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:51:13,697 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:51:13,697 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 01:51:13,697 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 01:51:13,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:51:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:51:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:51:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 01:51:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 01:51:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:51:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:51:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:51:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:51:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:51:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:51:19,935 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:51:19,936 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:51:19,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:19 BoogieIcfgContainer [2019-10-15 01:51:19,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:51:19,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:51:19,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:51:19,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:51:19,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:51:10" (1/3) ... [2019-10-15 01:51:19,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f8a719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:19, skipping insertion in model container [2019-10-15 01:51:19,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13" (2/3) ... [2019-10-15 01:51:19,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f8a719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:19, skipping insertion in model container [2019-10-15 01:51:19,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:19" (3/3) ... [2019-10-15 01:51:19,946 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label23.c [2019-10-15 01:51:19,956 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:51:19,970 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:51:19,982 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:51:20,015 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:51:20,015 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:51:20,015 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:51:20,016 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:51:20,016 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:51:20,016 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:51:20,016 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:51:20,016 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:51:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-15 01:51:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:51:20,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:20,057 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:20,059 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -874911154, now seen corresponding path program 1 times [2019-10-15 01:51:20,075 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:20,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496767270] [2019-10-15 01:51:20,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:20,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:20,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:20,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496767270] [2019-10-15 01:51:20,299 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:20,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:51:20,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968098002] [2019-10-15 01:51:20,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:51:20,305 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:51:20,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:51:20,323 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 3 states. [2019-10-15 01:51:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:25,544 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2019-10-15 01:51:25,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:51:25,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:51:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:25,580 INFO L225 Difference]: With dead ends: 2068 [2019-10-15 01:51:25,580 INFO L226 Difference]: Without dead ends: 1371 [2019-10-15 01:51:25,591 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:51:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-10-15 01:51:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367. [2019-10-15 01:51:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1367 states. [2019-10-15 01:51:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2628 transitions. [2019-10-15 01:51:25,798 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2628 transitions. Word has length 11 [2019-10-15 01:51:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:25,798 INFO L462 AbstractCegarLoop]: Abstraction has 1367 states and 2628 transitions. [2019-10-15 01:51:25,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:51:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2628 transitions. [2019-10-15 01:51:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:51:25,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:25,802 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:25,802 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:25,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:25,803 INFO L82 PathProgramCache]: Analyzing trace with hash -570548412, now seen corresponding path program 1 times [2019-10-15 01:51:25,804 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:25,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659850261] [2019-10-15 01:51:25,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:25,805 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:25,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:25,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659850261] [2019-10-15 01:51:25,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:25,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:51:25,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991796032] [2019-10-15 01:51:25,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:51:25,985 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:25,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:51:25,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:51:25,986 INFO L87 Difference]: Start difference. First operand 1367 states and 2628 transitions. Second operand 5 states. [2019-10-15 01:51:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:33,075 INFO L93 Difference]: Finished difference Result 4145 states and 7983 transitions. [2019-10-15 01:51:33,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:51:33,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-15 01:51:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:33,093 INFO L225 Difference]: With dead ends: 4145 [2019-10-15 01:51:33,093 INFO L226 Difference]: Without dead ends: 2783 [2019-10-15 01:51:33,100 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:51:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2019-10-15 01:51:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2754. [2019-10-15 01:51:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2754 states. [2019-10-15 01:51:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 4674 transitions. [2019-10-15 01:51:33,213 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 4674 transitions. Word has length 21 [2019-10-15 01:51:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:33,213 INFO L462 AbstractCegarLoop]: Abstraction has 2754 states and 4674 transitions. [2019-10-15 01:51:33,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:51:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 4674 transitions. [2019-10-15 01:51:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:51:33,215 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:33,215 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:33,215 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1636342952, now seen corresponding path program 1 times [2019-10-15 01:51:33,216 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:33,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907210054] [2019-10-15 01:51:33,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:33,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:33,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:33,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907210054] [2019-10-15 01:51:33,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278045796] [2019-10-15 01:51:33,343 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 [2019-10-15 01:51:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:33,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:51:33,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:51:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:33,500 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:51:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:33,542 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:51:33,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 01:51:33,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771514973] [2019-10-15 01:51:33,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:51:33,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:33,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:51:33,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:51:33,544 INFO L87 Difference]: Start difference. First operand 2754 states and 4674 transitions. Second operand 4 states. [2019-10-15 01:51:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:41,516 INFO L93 Difference]: Finished difference Result 10993 states and 19157 transitions. [2019-10-15 01:51:41,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:51:41,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-15 01:51:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:41,567 INFO L225 Difference]: With dead ends: 10993 [2019-10-15 01:51:41,567 INFO L226 Difference]: Without dead ends: 8244 [2019-10-15 01:51:41,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:51:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8244 states. [2019-10-15 01:51:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8244 to 7921. [2019-10-15 01:51:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7921 states. [2019-10-15 01:51:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7921 states to 7921 states and 12067 transitions. [2019-10-15 01:51:41,854 INFO L78 Accepts]: Start accepts. Automaton has 7921 states and 12067 transitions. Word has length 27 [2019-10-15 01:51:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:41,855 INFO L462 AbstractCegarLoop]: Abstraction has 7921 states and 12067 transitions. [2019-10-15 01:51:41,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:51:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 7921 states and 12067 transitions. [2019-10-15 01:51:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 01:51:41,861 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:41,861 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:42,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:51:42,077 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:42,078 INFO L82 PathProgramCache]: Analyzing trace with hash 12952367, now seen corresponding path program 1 times [2019-10-15 01:51:42,078 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:42,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071720452] [2019-10-15 01:51:42,078 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:42,078 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:42,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:42,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071720452] [2019-10-15 01:51:42,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:42,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:51:42,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993096385] [2019-10-15 01:51:42,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:51:42,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:42,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:51:42,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:51:42,252 INFO L87 Difference]: Start difference. First operand 7921 states and 12067 transitions. Second operand 6 states.