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/Problem02_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:50,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:50,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:50,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:42:50,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:50,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:50,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:50,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:50,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:50,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:50,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:50,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:50,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:50,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:50,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:50,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:50,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:50,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:50,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:50,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:50,500 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 01:42:50,525 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:50,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:50,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:50,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:50,529 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:50,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:50,529 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:50,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:50,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:50,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:50,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:50,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:50,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:50,530 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:50,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:50,531 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:50,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:50,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:50,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:50,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:50,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:50,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:50,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:50,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:50,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:50,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:50,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:50,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:50,535 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 01:42:50,817 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:50,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:50,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:50,835 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:50,836 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:50,836 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-10-15 01:42:50,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b240ecd9/dc4d8c8e55d44ca5b944bb6cf7fa595d/FLAG2ba33cd09 [2019-10-15 01:42:51,439 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:51,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-10-15 01:42:51,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b240ecd9/dc4d8c8e55d44ca5b944bb6cf7fa595d/FLAG2ba33cd09 [2019-10-15 01:42:51,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b240ecd9/dc4d8c8e55d44ca5b944bb6cf7fa595d [2019-10-15 01:42:51,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:51,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:51,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:51,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:51,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:51,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:51" (1/1) ... [2019-10-15 01:42:51,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472088b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:51, skipping insertion in model container [2019-10-15 01:42:51,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:51" (1/1) ... [2019-10-15 01:42:51,763 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:51,806 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:52,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:52,324 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:52,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:52,446 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:52,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52 WrapperNode [2019-10-15 01:42:52,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:52,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:52,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:52,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:52,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (1/1) ... [2019-10-15 01:42:52,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (1/1) ... [2019-10-15 01:42:52,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (1/1) ... [2019-10-15 01:42:52,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (1/1) ... [2019-10-15 01:42:52,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (1/1) ... [2019-10-15 01:42:52,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (1/1) ... [2019-10-15 01:42:52,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (1/1) ... [2019-10-15 01:42:52,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:52,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:52,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:52,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:52,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (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 01:42:52,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:54,695 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:54,696 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:54,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:54 BoogieIcfgContainer [2019-10-15 01:42:54,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:54,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:54,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:54,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:54,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:51" (1/3) ... [2019-10-15 01:42:54,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37101690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:54, skipping insertion in model container [2019-10-15 01:42:54,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:52" (2/3) ... [2019-10-15 01:42:54,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37101690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:54, skipping insertion in model container [2019-10-15 01:42:54,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:54" (3/3) ... [2019-10-15 01:42:54,706 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label50.c [2019-10-15 01:42:54,716 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:54,724 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:54,736 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:54,761 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:54,761 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:54,762 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:54,762 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:54,762 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:54,762 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:54,763 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:54,763 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:54,798 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:54,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:54,801 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:54,807 INFO L82 PathProgramCache]: Analyzing trace with hash -220073893, now seen corresponding path program 1 times [2019-10-15 01:42:54,816 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:54,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613879598] [2019-10-15 01:42:54,817 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:54,817 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:54,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:55,262 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 01:42:55,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613879598] [2019-10-15 01:42:55,264 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:55,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:55,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19802203] [2019-10-15 01:42:55,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:55,275 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:55,294 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:55,851 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:55,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:55,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:55,905 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:55,905 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:55,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 01:42:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:56,012 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:56,013 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:56,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:56,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:56,018 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:56,019 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash -702608672, now seen corresponding path program 1 times [2019-10-15 01:42:56,020 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:56,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43288560] [2019-10-15 01:42:56,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:56,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:56,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:56,168 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 01:42:56,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43288560] [2019-10-15 01:42:56,169 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:56,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:56,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423490607] [2019-10-15 01:42:56,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:56,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:56,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:56,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:56,173 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:42:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:56,569 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:42:56,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:56,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:42:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:56,577 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:42:56,577 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:42:56,580 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 01:42:56,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:42:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:42:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:42:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-10-15 01:42:56,619 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-10-15 01:42:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:56,625 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-10-15 01:42:56,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-10-15 01:42:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-15 01:42:56,633 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:56,633 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:42:56,633 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:56,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1246707500, now seen corresponding path program 1 times [2019-10-15 01:42:56,637 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:56,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607139137] [2019-10-15 01:42:56,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:56,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:56,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:56,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607139137] [2019-10-15 01:42:56,756 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:56,756 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:56,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481054335] [2019-10-15 01:42:56,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:56,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:56,758 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 6 states. [2019-10-15 01:42:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:57,449 INFO L93 Difference]: Finished difference Result 1059 states and 1889 transitions. [2019-10-15 01:42:57,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:42:57,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-10-15 01:42:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:57,457 INFO L225 Difference]: With dead ends: 1059 [2019-10-15 01:42:57,457 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:42:57,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:42:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:42:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 705. [2019-10-15 01:42:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2019-10-15 01:42:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1144 transitions. [2019-10-15 01:42:57,518 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1144 transitions. Word has length 100 [2019-10-15 01:42:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:57,519 INFO L462 AbstractCegarLoop]: Abstraction has 705 states and 1144 transitions. [2019-10-15 01:42:57,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1144 transitions. [2019-10-15 01:42:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:42:57,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:57,525 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:42:57,525 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1308012349, now seen corresponding path program 1 times [2019-10-15 01:42:57,526 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:57,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664357040] [2019-10-15 01:42:57,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:57,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:57,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:57,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664357040] [2019-10-15 01:42:57,624 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:57,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:57,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782003710] [2019-10-15 01:42:57,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:57,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:57,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:57,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:57,626 INFO L87 Difference]: Start difference. First operand 705 states and 1144 transitions. Second operand 6 states. [2019-10-15 01:42:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:58,345 INFO L93 Difference]: Finished difference Result 1783 states and 2979 transitions. [2019-10-15 01:42:58,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:42:58,346 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:42:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:58,354 INFO L225 Difference]: With dead ends: 1783 [2019-10-15 01:42:58,354 INFO L226 Difference]: Without dead ends: 1083 [2019-10-15 01:42:58,358 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 01:42:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2019-10-15 01:42:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1069. [2019-10-15 01:42:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-10-15 01:42:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1678 transitions. [2019-10-15 01:42:58,415 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1678 transitions. Word has length 108 [2019-10-15 01:42:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:58,417 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1678 transitions. [2019-10-15 01:42:58,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1678 transitions. [2019-10-15 01:42:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:42:58,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:58,426 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:42:58,427 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:58,427 INFO L82 PathProgramCache]: Analyzing trace with hash 4631830, now seen corresponding path program 1 times [2019-10-15 01:42:58,427 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:58,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436462995] [2019-10-15 01:42:58,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:58,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:58,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:42:58,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436462995] [2019-10-15 01:42:58,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883566191] [2019-10-15 01:42:58,614 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 01:42:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:58,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:58,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:42:58,806 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:42:58,902 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:42:58,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-10-15 01:42:58,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475464631] [2019-10-15 01:42:58,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:58,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:58,905 INFO L87 Difference]: Start difference. First operand 1069 states and 1678 transitions. Second operand 3 states. [2019-10-15 01:42:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:59,324 INFO L93 Difference]: Finished difference Result 2733 states and 4333 transitions. [2019-10-15 01:42:59,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:59,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-15 01:42:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:59,331 INFO L225 Difference]: With dead ends: 2733 [2019-10-15 01:42:59,332 INFO L226 Difference]: Without dead ends: 977 [2019-10-15 01:42:59,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-10-15 01:42:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 977. [2019-10-15 01:42:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2019-10-15 01:42:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1448 transitions. [2019-10-15 01:42:59,372 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1448 transitions. Word has length 121 [2019-10-15 01:42:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:59,373 INFO L462 AbstractCegarLoop]: Abstraction has 977 states and 1448 transitions. [2019-10-15 01:42:59,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1448 transitions. [2019-10-15 01:42:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:42:59,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:59,378 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:42:59,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:59,588 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1269666795, now seen corresponding path program 1 times [2019-10-15 01:42:59,589 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:59,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772462784] [2019-10-15 01:42:59,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:59,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:59,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:42:59,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772462784] [2019-10-15 01:42:59,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733296257] [2019-10-15 01:42:59,674 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 01:42:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:59,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:59,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:42:59,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:42:59,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525435383] [2019-10-15 01:42:59,918 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:59,918 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:59,927 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:59,934 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:59,935 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:00,228 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:01,786 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:43:10,594 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:10,609 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:10,854 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2019-10-15 01:43:11,084 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:11,435 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:11,883 WARN L191 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 96 [2019-10-15 01:43:12,178 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2019-10-15 01:43:12,441 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2019-10-15 01:43:12,684 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:43:12,952 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:43:13,253 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2019-10-15 01:43:13,585 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2019-10-15 01:43:13,838 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-10-15 01:43:17,856 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:17,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 22 [2019-10-15 01:43:17,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730763577] [2019-10-15 01:43:17,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:43:17,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:43:17,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:43:17,861 INFO L87 Difference]: Start difference. First operand 977 states and 1448 transitions. Second operand 22 states. [2019-10-15 01:43:18,179 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:18,638 WARN L191 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 104 [2019-10-15 01:43:19,049 WARN L191 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:43:19,603 WARN L191 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 96 [2019-10-15 01:43:19,989 WARN L191 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:43:20,390 WARN L191 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:43:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:23,189 INFO L93 Difference]: Finished difference Result 1952 states and 2870 transitions. [2019-10-15 01:43:23,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:43:23,191 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2019-10-15 01:43:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:23,197 INFO L225 Difference]: With dead ends: 1952 [2019-10-15 01:43:23,197 INFO L226 Difference]: Without dead ends: 980 [2019-10-15 01:43:23,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 294 SyntacticMatches, 92 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:43:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2019-10-15 01:43:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 888. [2019-10-15 01:43:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-10-15 01:43:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1177 transitions. [2019-10-15 01:43:23,241 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1177 transitions. Word has length 131 [2019-10-15 01:43:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:23,241 INFO L462 AbstractCegarLoop]: Abstraction has 888 states and 1177 transitions. [2019-10-15 01:43:23,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:43:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1177 transitions. [2019-10-15 01:43:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 01:43:23,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:23,245 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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, 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 01:43:23,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:23,450 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:23,451 INFO L82 PathProgramCache]: Analyzing trace with hash 650523707, now seen corresponding path program 1 times [2019-10-15 01:43:23,451 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:23,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836465581] [2019-10-15 01:43:23,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:23,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:23,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:23,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836465581] [2019-10-15 01:43:23,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142447642] [2019-10-15 01:43:23,632 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 01:43:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:23,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:23,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:43:23,843 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 61 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:43:23,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465997834] [2019-10-15 01:43:23,941 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:23,941 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:23,942 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:23,943 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:23,943 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:24,070 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:25,179 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs [2019-10-15 01:43:26,690 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:26,702 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:26,945 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2019-10-15 01:43:27,185 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:27,484 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:27,773 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2019-10-15 01:43:28,164 WARN L191 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 71 [2019-10-15 01:43:28,423 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2019-10-15 01:43:28,639 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64