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/Problem01_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:39:48,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:39:48,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:39:48,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:39:48,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:39:48,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:39:48,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:39:48,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:39:48,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:39:48,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:39:48,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:39:48,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:39:48,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:39:48,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:39:48,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:39:48,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:39:48,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:39:48,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:39:48,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:39:48,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:39:48,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:39:48,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:39:48,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:39:48,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:39:48,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:39:48,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:39:48,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:39:48,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:39:48,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:39:48,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:39:48,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:39:48,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:39:48,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:39:48,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:39:48,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:39:48,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:39:48,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:39:48,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:39:48,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:39:48,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:39:48,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:39:48,553 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 01:39:48,578 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:39:48,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:39:48,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:39:48,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:39:48,582 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:39:48,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:39:48,583 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:39:48,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:39:48,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:39:48,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:39:48,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:39:48,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:39:48,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:39:48,585 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:39:48,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:39:48,585 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:39:48,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:39:48,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:39:48,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:39:48,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:39:48,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:39:48,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:39:48,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:39:48,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:39:48,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:39:48,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:39:48,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:39:48,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:39:48,590 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 01:39:48,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:39:48,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:39:48,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:39:48,869 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:39:48,869 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:39:48,870 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-10-15 01:39:48,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ef12c99/c64c068022564da8bf52fc2c98e69ae3/FLAG67f3e0e05 [2019-10-15 01:39:49,465 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:39:49,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-10-15 01:39:49,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ef12c99/c64c068022564da8bf52fc2c98e69ae3/FLAG67f3e0e05 [2019-10-15 01:39:49,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ef12c99/c64c068022564da8bf52fc2c98e69ae3 [2019-10-15 01:39:49,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:39:49,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:39:49,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:39:49,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:39:49,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:39:49,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:39:49" (1/1) ... [2019-10-15 01:39:49,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40bebede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:49, skipping insertion in model container [2019-10-15 01:39:49,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:39:49" (1/1) ... [2019-10-15 01:39:49,760 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:39:49,811 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:39:50,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:39:50,285 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:39:50,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:39:50,452 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:39:50,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50 WrapperNode [2019-10-15 01:39:50,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:39:50,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:39:50,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:39:50,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:39:50,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (1/1) ... [2019-10-15 01:39:50,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (1/1) ... [2019-10-15 01:39:50,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (1/1) ... [2019-10-15 01:39:50,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (1/1) ... [2019-10-15 01:39:50,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (1/1) ... [2019-10-15 01:39:50,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (1/1) ... [2019-10-15 01:39:50,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (1/1) ... [2019-10-15 01:39:50,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:39:50,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:39:50,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:39:50,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:39:50,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (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 01:39:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:39:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:39:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:39:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:39:50,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:39:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:39:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:39:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:39:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:39:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:39:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:39:52,527 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:39:52,528 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:39:52,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:39:52 BoogieIcfgContainer [2019-10-15 01:39:52,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:39:52,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:39:52,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:39:52,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:39:52,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:39:49" (1/3) ... [2019-10-15 01:39:52,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c2ec5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:39:52, skipping insertion in model container [2019-10-15 01:39:52,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:50" (2/3) ... [2019-10-15 01:39:52,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c2ec5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:39:52, skipping insertion in model container [2019-10-15 01:39:52,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:39:52" (3/3) ... [2019-10-15 01:39:52,542 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label25.c [2019-10-15 01:39:52,556 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:39:52,565 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:39:52,576 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:39:52,610 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:39:52,610 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:39:52,610 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:39:52,610 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:39:52,611 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:39:52,612 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:39:52,612 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:39:52,612 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:39:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-15 01:39:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:39:52,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:52,641 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:52,642 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:52,647 INFO L82 PathProgramCache]: Analyzing trace with hash 826823268, now seen corresponding path program 1 times [2019-10-15 01:39:52,654 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:52,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199633732] [2019-10-15 01:39:52,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:52,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:52,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:53,044 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 01:39:53,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199633732] [2019-10-15 01:39:53,045 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:53,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:39:53,046 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292237941] [2019-10-15 01:39:53,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:53,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:53,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:39:53,069 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-15 01:39:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:53,710 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-15 01:39:53,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:53,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-15 01:39:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:53,735 INFO L225 Difference]: With dead ends: 246 [2019-10-15 01:39:53,735 INFO L226 Difference]: Without dead ends: 157 [2019-10-15 01:39:53,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:39:53,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-15 01:39:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-15 01:39:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-15 01:39:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2019-10-15 01:39:53,816 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 77 [2019-10-15 01:39:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:53,817 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2019-10-15 01:39:53,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2019-10-15 01:39:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:39:53,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:53,822 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:39:53,822 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:53,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1022492965, now seen corresponding path program 1 times [2019-10-15 01:39:53,823 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:53,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839217860] [2019-10-15 01:39:53,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:53,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:53,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:53,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839217860] [2019-10-15 01:39:53,931 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:53,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:39:53,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383349078] [2019-10-15 01:39:53,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:39:53,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:53,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:39:53,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:39:53,935 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand 5 states. [2019-10-15 01:39:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:54,433 INFO L93 Difference]: Finished difference Result 479 states and 892 transitions. [2019-10-15 01:39:54,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:39:54,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2019-10-15 01:39:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:54,439 INFO L225 Difference]: With dead ends: 479 [2019-10-15 01:39:54,439 INFO L226 Difference]: Without dead ends: 327 [2019-10-15 01:39:54,441 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:39:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-10-15 01:39:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 317. [2019-10-15 01:39:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-15 01:39:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 547 transitions. [2019-10-15 01:39:54,494 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 547 transitions. Word has length 86 [2019-10-15 01:39:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:54,495 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 547 transitions. [2019-10-15 01:39:54,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:39:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 547 transitions. [2019-10-15 01:39:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-15 01:39:54,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:54,500 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-10-15 01:39:54,500 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:54,500 INFO L82 PathProgramCache]: Analyzing trace with hash -311199160, now seen corresponding path program 1 times [2019-10-15 01:39:54,501 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:54,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375762807] [2019-10-15 01:39:54,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:54,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:54,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:54,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375762807] [2019-10-15 01:39:54,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311842158] [2019-10-15 01:39:54,616 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 01:39:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:54,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:39:54,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:39:54,868 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:39:54,925 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:39:54,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 01:39:54,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39638542] [2019-10-15 01:39:54,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:54,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:54,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:54,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:39:54,929 INFO L87 Difference]: Start difference. First operand 317 states and 547 transitions. Second operand 3 states. [2019-10-15 01:39:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:55,363 INFO L93 Difference]: Finished difference Result 860 states and 1512 transitions. [2019-10-15 01:39:55,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:55,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-10-15 01:39:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:55,368 INFO L225 Difference]: With dead ends: 860 [2019-10-15 01:39:55,369 INFO L226 Difference]: Without dead ends: 548 [2019-10-15 01:39:55,370 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:39:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2019-10-15 01:39:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2019-10-15 01:39:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2019-10-15 01:39:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 908 transitions. [2019-10-15 01:39:55,404 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 908 transitions. Word has length 97 [2019-10-15 01:39:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:55,405 INFO L462 AbstractCegarLoop]: Abstraction has 548 states and 908 transitions. [2019-10-15 01:39:55,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 908 transitions. [2019-10-15 01:39:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:39:55,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:55,410 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:39:55,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:55,619 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1630248519, now seen corresponding path program 1 times [2019-10-15 01:39:55,621 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:55,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254319186] [2019-10-15 01:39:55,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:55,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:55,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:55,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254319186] [2019-10-15 01:39:55,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43773555] [2019-10-15 01:39:55,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:55,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:39:55,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:55,913 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:55,956 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:39:55,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-15 01:39:55,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250963596] [2019-10-15 01:39:55,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:55,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:55,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:55,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:39:55,959 INFO L87 Difference]: Start difference. First operand 548 states and 908 transitions. Second operand 3 states. [2019-10-15 01:39:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:56,433 INFO L93 Difference]: Finished difference Result 1626 states and 2793 transitions. [2019-10-15 01:39:56,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:56,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-15 01:39:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:56,442 INFO L225 Difference]: With dead ends: 1626 [2019-10-15 01:39:56,443 INFO L226 Difference]: Without dead ends: 1083 [2019-10-15 01:39:56,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:39:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2019-10-15 01:39:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 933. [2019-10-15 01:39:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2019-10-15 01:39:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1505 transitions. [2019-10-15 01:39:56,487 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1505 transitions. Word has length 96 [2019-10-15 01:39:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:56,487 INFO L462 AbstractCegarLoop]: Abstraction has 933 states and 1505 transitions. [2019-10-15 01:39:56,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1505 transitions. [2019-10-15 01:39:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:39:56,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:56,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:56,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:56,697 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 494119127, now seen corresponding path program 1 times [2019-10-15 01:39:56,698 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:56,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895119986] [2019-10-15 01:39:56,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:56,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:56,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:56,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895119986] [2019-10-15 01:39:56,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:56,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:39:56,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440898141] [2019-10-15 01:39:56,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:39:56,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:39:56,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:39:56,775 INFO L87 Difference]: Start difference. First operand 933 states and 1505 transitions. Second operand 6 states. [2019-10-15 01:39:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:57,455 INFO L93 Difference]: Finished difference Result 2353 states and 3945 transitions. [2019-10-15 01:39:57,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:39:57,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2019-10-15 01:39:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:57,467 INFO L225 Difference]: With dead ends: 2353 [2019-10-15 01:39:57,467 INFO L226 Difference]: Without dead ends: 1425 [2019-10-15 01:39:57,470 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 [2019-10-15 01:39:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2019-10-15 01:39:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1417. [2019-10-15 01:39:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1417 states. [2019-10-15 01:39:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2274 transitions. [2019-10-15 01:39:57,539 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2274 transitions. Word has length 105 [2019-10-15 01:39:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:57,539 INFO L462 AbstractCegarLoop]: Abstraction has 1417 states and 2274 transitions. [2019-10-15 01:39:57,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:39:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2274 transitions. [2019-10-15 01:39:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:39:57,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:57,547 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:57,548 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:57,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1462332342, now seen corresponding path program 1 times [2019-10-15 01:39:57,553 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:57,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233007625] [2019-10-15 01:39:57,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:57,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:57,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:57,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233007625] [2019-10-15 01:39:57,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575276929] [2019-10-15 01:39:57,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:57,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:39:57,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:57,841 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:57,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537772183] [2019-10-15 01:39:58,002 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-15 01:39:58,002 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:39:58,008 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:39:58,016 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:39:58,016 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:39:58,291 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 100 for LOIs [2019-10-15 01:39:58,917 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 158 [2019-10-15 01:40:00,458 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 134 for LOIs [2019-10-15 01:40:00,868 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 135 [2019-10-15 01:40:03,335 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 134 [2019-10-15 01:40:11,933 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2019-10-15 01:40:12,298 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 59562 conjuctions. This might take some time... [2019-10-15 01:40:23,931 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2019-10-15 01:40:28,661 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 187338 conjuctions. This might take some time...