java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:55,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:55,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:55,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:55,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:55,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:55,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:55,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:55,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:55,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:55,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:55,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:55,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:55,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:55,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:55,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:55,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:55,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:55,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:55,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:55,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:55,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:55,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:55,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:55,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:55,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:55,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:55,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:55,540 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 00:09:55,560 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:55,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:55,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:55,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:55,562 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:55,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:55,563 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:55,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:55,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:55,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:55,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:55,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:55,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:55,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:55,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:55,565 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:55,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:55,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:55,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:55,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:55,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:55,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:55,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:55,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:55,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:55,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:55,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:55,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:55,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:09:55,847 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:55,862 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:55,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:55,867 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:55,868 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:55,868 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21.c [2019-10-15 00:09:55,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb904e6fd/79d8ffc30d6d4ef7ae8e5e7da07ac5e1/FLAG9763cb174 [2019-10-15 00:09:56,715 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:56,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label21.c [2019-10-15 00:09:56,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb904e6fd/79d8ffc30d6d4ef7ae8e5e7da07ac5e1/FLAG9763cb174 [2019-10-15 00:09:56,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb904e6fd/79d8ffc30d6d4ef7ae8e5e7da07ac5e1 [2019-10-15 00:09:56,809 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:56,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:56,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:56,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:56,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:56,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:56" (1/1) ... [2019-10-15 00:09:56,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27396f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:56, skipping insertion in model container [2019-10-15 00:09:56,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:56" (1/1) ... [2019-10-15 00:09:56,827 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:56,951 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:58,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:58,298 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:58,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:58,912 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:58,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58 WrapperNode [2019-10-15 00:09:58,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:58,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:58,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:58,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:58,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (1/1) ... [2019-10-15 00:09:58,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (1/1) ... [2019-10-15 00:09:58,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (1/1) ... [2019-10-15 00:09:58,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (1/1) ... [2019-10-15 00:09:59,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (1/1) ... [2019-10-15 00:09:59,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (1/1) ... [2019-10-15 00:09:59,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (1/1) ... [2019-10-15 00:09:59,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:59,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:59,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:59,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:59,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (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 00:09:59,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:59,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:59,255 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:59,255 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:59,255 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:09:59,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:09:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:02,892 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:02,893 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:02,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:02 BoogieIcfgContainer [2019-10-15 00:10:02,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:02,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:02,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:02,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:02,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:56" (1/3) ... [2019-10-15 00:10:02,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfb1419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:02, skipping insertion in model container [2019-10-15 00:10:02,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:58" (2/3) ... [2019-10-15 00:10:02,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfb1419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:02, skipping insertion in model container [2019-10-15 00:10:02,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:02" (3/3) ... [2019-10-15 00:10:02,913 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label21.c [2019-10-15 00:10:02,926 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:02,939 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:02,951 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:02,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:02,986 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:02,986 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:02,986 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:02,986 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:02,986 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:02,987 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:03,044 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-15 00:10:03,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:03,099 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] [2019-10-15 00:10:03,101 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash -242469919, now seen corresponding path program 1 times [2019-10-15 00:10:03,115 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:03,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460614478] [2019-10-15 00:10:03,116 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:03,116 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:03,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:03,502 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 00:10:03,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460614478] [2019-10-15 00:10:03,503 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:03,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:03,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125097146] [2019-10-15 00:10:03,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:03,513 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:03,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:03,536 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:08,197 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:08,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:08,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-15 00:10:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:08,230 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:08,231 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:08,240 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 00:10:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-15 00:10:08,402 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 64 [2019-10-15 00:10:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:08,406 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-15 00:10:08,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-15 00:10:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 00:10:08,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:08,424 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:08,424 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1527115477, now seen corresponding path program 1 times [2019-10-15 00:10:08,426 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:08,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142987786] [2019-10-15 00:10:08,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:08,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:08,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:08,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142987786] [2019-10-15 00:10:08,634 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:08,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:08,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003475053] [2019-10-15 00:10:08,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:08,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:08,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:08,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:08,637 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-15 00:10:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:14,110 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-15 00:10:14,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:14,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-10-15 00:10:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:14,138 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:14,138 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:14,143 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 00:10:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-15 00:10:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:10:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5126 transitions. [2019-10-15 00:10:14,230 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5126 transitions. Word has length 137 [2019-10-15 00:10:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:14,231 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 5126 transitions. [2019-10-15 00:10:14,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5126 transitions. [2019-10-15 00:10:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-15 00:10:14,235 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:14,235 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:14,236 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:14,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1106833084, now seen corresponding path program 1 times [2019-10-15 00:10:14,236 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:14,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515627607] [2019-10-15 00:10:14,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:14,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:14,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:14,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515627607] [2019-10-15 00:10:14,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:14,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:14,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476156159] [2019-10-15 00:10:14,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:14,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:14,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:14,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:14,582 INFO L87 Difference]: Start difference. First operand 2864 states and 5126 transitions. Second operand 6 states. [2019-10-15 00:10:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:19,761 INFO L93 Difference]: Finished difference Result 7213 states and 12908 transitions. [2019-10-15 00:10:19,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:19,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 226 [2019-10-15 00:10:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:19,789 INFO L225 Difference]: With dead ends: 7213 [2019-10-15 00:10:19,789 INFO L226 Difference]: Without dead ends: 4355 [2019-10-15 00:10:19,796 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 00:10:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2019-10-15 00:10:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 4331. [2019-10-15 00:10:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-10-15 00:10:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 7302 transitions. [2019-10-15 00:10:19,909 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 7302 transitions. Word has length 226 [2019-10-15 00:10:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:19,910 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 7302 transitions. [2019-10-15 00:10:19,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 7302 transitions. [2019-10-15 00:10:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-10-15 00:10:19,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:19,915 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-15 00:10:19,915 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:19,916 INFO L82 PathProgramCache]: Analyzing trace with hash -467155753, now seen corresponding path program 1 times [2019-10-15 00:10:19,916 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:19,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015936987] [2019-10-15 00:10:19,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:19,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:19,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 114 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:20,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015936987] [2019-10-15 00:10:20,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531899447] [2019-10-15 00:10:20,127 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 00:10:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:20,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:20,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-15 00:10:20,396 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 114 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:20,709 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:20,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:10:20,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772860124] [2019-10-15 00:10:20,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:20,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:20,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:10:20,714 INFO L87 Difference]: Start difference. First operand 4331 states and 7302 transitions. Second operand 5 states. [2019-10-15 00:10:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:26,615 INFO L93 Difference]: Finished difference Result 10979 states and 18825 transitions. [2019-10-15 00:10:26,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:26,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 268 [2019-10-15 00:10:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:26,652 INFO L225 Difference]: With dead ends: 10979 [2019-10-15 00:10:26,652 INFO L226 Difference]: Without dead ends: 6654 [2019-10-15 00:10:26,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:10:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2019-10-15 00:10:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 6600. [2019-10-15 00:10:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6600 states. [2019-10-15 00:10:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 10776 transitions. [2019-10-15 00:10:26,853 INFO L78 Accepts]: Start accepts. Automaton has 6600 states and 10776 transitions. Word has length 268 [2019-10-15 00:10:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:26,854 INFO L462 AbstractCegarLoop]: Abstraction has 6600 states and 10776 transitions. [2019-10-15 00:10:26,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states and 10776 transitions. [2019-10-15 00:10:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-15 00:10:26,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:26,861 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:27,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:27,066 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash 767703552, now seen corresponding path program 1 times [2019-10-15 00:10:27,069 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:27,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530545772] [2019-10-15 00:10:27,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:27,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:27,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:27,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530545772] [2019-10-15 00:10:27,514 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:27,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:27,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891449598] [2019-10-15 00:10:27,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:27,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:27,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:27,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:27,516 INFO L87 Difference]: Start difference. First operand 6600 states and 10776 transitions. Second operand 6 states. [2019-10-15 00:10:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:32,298 INFO L93 Difference]: Finished difference Result 15532 states and 25737 transitions. [2019-10-15 00:10:32,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:32,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-10-15 00:10:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:32,338 INFO L225 Difference]: With dead ends: 15532 [2019-10-15 00:10:32,339 INFO L226 Difference]: Without dead ends: 8938 [2019-10-15 00:10:32,355 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 00:10:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2019-10-15 00:10:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 8892. [2019-10-15 00:10:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8892 states. [2019-10-15 00:10:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8892 states to 8892 states and 13600 transitions. [2019-10-15 00:10:32,545 INFO L78 Accepts]: Start accepts. Automaton has 8892 states and 13600 transitions. Word has length 276 [2019-10-15 00:10:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:32,546 INFO L462 AbstractCegarLoop]: Abstraction has 8892 states and 13600 transitions. [2019-10-15 00:10:32,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8892 states and 13600 transitions. [2019-10-15 00:10:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-15 00:10:32,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:32,559 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:32,559 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1641533328, now seen corresponding path program 1 times [2019-10-15 00:10:32,560 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:32,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364332392] [2019-10-15 00:10:32,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:32,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:32,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 114 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:32,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364332392] [2019-10-15 00:10:32,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097401241] [2019-10-15 00:10:32,774 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 00:10:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:32,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:32,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-15 00:10:33,107 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 114 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:33,252 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:33,252 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-15 00:10:33,252 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327490051] [2019-10-15 00:10:33,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:33,253 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:33,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:33,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:10:33,253 INFO L87 Difference]: Start difference. First operand 8892 states and 13600 transitions. Second operand 5 states.