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/Problem15_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:08:32,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:08:32,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:08:32,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:08:32,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:08:32,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:08:32,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:08:32,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:08:32,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:08:32,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:08:32,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:08:32,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:08:32,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:08:32,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:08:33,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:08:33,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:08:33,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:08:33,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:08:33,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:08:33,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:08:33,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:08:33,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:08:33,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:08:33,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:08:33,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:08:33,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:08:33,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:08:33,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:08:33,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:08:33,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:08:33,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:08:33,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:08:33,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:08:33,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:08:33,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:08:33,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:08:33,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:08:33,054 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:08:33,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:08:33,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:08:33,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:08:33,058 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:08:33,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:08:33,058 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:08:33,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:08:33,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:08:33,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:08:33,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:08:33,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:08:33,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:08:33,061 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:08:33,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:08:33,061 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:08:33,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:08:33,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:08:33,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:08:33,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:08:33,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:08:33,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:08:33,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:08:33,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:08:33,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:08:33,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:08:33,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:08:33,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:08:33,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:08:33,350 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:08:33,368 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:08:33,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:08:33,372 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:08:33,372 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:08:33,373 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-10-13 20:08:33,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d13da296a/11ea8e6b236f4825b83a4fc681685e9a/FLAGfd1f2dd73 [2019-10-13 20:08:34,042 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:08:34,044 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-10-13 20:08:34,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d13da296a/11ea8e6b236f4825b83a4fc681685e9a/FLAGfd1f2dd73 [2019-10-13 20:08:34,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d13da296a/11ea8e6b236f4825b83a4fc681685e9a [2019-10-13 20:08:34,275 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:08:34,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:08:34,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:34,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:08:34,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:08:34,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:34" (1/1) ... [2019-10-13 20:08:34,285 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 13.10 08:08:34, skipping insertion in model container [2019-10-13 20:08:34,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:34" (1/1) ... [2019-10-13 20:08:34,295 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:08:34,380 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:08:35,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:35,316 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:08:35,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:35,716 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:08:35,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35 WrapperNode [2019-10-13 20:08:35,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:35,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:08:35,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:08:35,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:08:35,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (1/1) ... [2019-10-13 20:08:35,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (1/1) ... [2019-10-13 20:08:35,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (1/1) ... [2019-10-13 20:08:35,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (1/1) ... [2019-10-13 20:08:35,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (1/1) ... [2019-10-13 20:08:35,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (1/1) ... [2019-10-13 20:08:35,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (1/1) ... [2019-10-13 20:08:35,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:08:35,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:08:35,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:08:35,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:08:35,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:08:35,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:08:35,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:08:35,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:08:35,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:08:35,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:08:36,000 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:08:36,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:08:36,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:08:36,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:08:36,002 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:08:36,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:08:36,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:08:36,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:08:40,242 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:08:40,242 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:08:40,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:40 BoogieIcfgContainer [2019-10-13 20:08:40,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:08:40,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:08:40,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:08:40,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:08:40,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:34" (1/3) ... [2019-10-13 20:08:40,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f362a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:40, skipping insertion in model container [2019-10-13 20:08:40,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:35" (2/3) ... [2019-10-13 20:08:40,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f362a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:40, skipping insertion in model container [2019-10-13 20:08:40,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:40" (3/3) ... [2019-10-13 20:08:40,257 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label42.c [2019-10-13 20:08:40,267 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:08:40,277 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:08:40,288 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:08:40,323 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:08:40,323 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:08:40,323 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:08:40,324 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:08:40,324 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:08:40,324 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:08:40,324 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:08:40,324 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:08:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 20:08:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 20:08:40,372 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:40,373 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] [2019-10-13 20:08:40,375 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2044127672, now seen corresponding path program 1 times [2019-10-13 20:08:40,387 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:40,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811871369] [2019-10-13 20:08:40,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:40,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:40,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:40,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811871369] [2019-10-13 20:08:40,760 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:40,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:40,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233421828] [2019-10-13 20:08:40,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:40,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:40,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:40,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:40,789 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-13 20:08:46,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:46,064 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-13 20:08:46,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:46,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2019-10-13 20:08:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:46,094 INFO L225 Difference]: With dead ends: 1554 [2019-10-13 20:08:46,094 INFO L226 Difference]: Without dead ends: 1036 [2019-10-13 20:08:46,112 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-13 20:08:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1013. [2019-10-13 20:08:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2019-10-13 20:08:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1638 transitions. [2019-10-13 20:08:46,229 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1638 transitions. Word has length 52 [2019-10-13 20:08:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:46,230 INFO L462 AbstractCegarLoop]: Abstraction has 1013 states and 1638 transitions. [2019-10-13 20:08:46,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1638 transitions. [2019-10-13 20:08:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 20:08:46,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:46,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:46,238 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash 147073843, now seen corresponding path program 1 times [2019-10-13 20:08:46,239 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:46,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002167174] [2019-10-13 20:08:46,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:46,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:46,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:46,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002167174] [2019-10-13 20:08:46,472 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:46,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:08:46,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977987755] [2019-10-13 20:08:46,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:46,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:46,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:46,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:08:46,481 INFO L87 Difference]: Start difference. First operand 1013 states and 1638 transitions. Second operand 5 states. [2019-10-13 20:08:50,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:50,103 INFO L93 Difference]: Finished difference Result 3003 states and 4930 transitions. [2019-10-13 20:08:50,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:50,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-10-13 20:08:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:50,117 INFO L225 Difference]: With dead ends: 3003 [2019-10-13 20:08:50,117 INFO L226 Difference]: Without dead ends: 1996 [2019-10-13 20:08:50,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:08:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-10-13 20:08:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1958. [2019-10-13 20:08:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1958 states. [2019-10-13 20:08:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2746 transitions. [2019-10-13 20:08:50,188 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2746 transitions. Word has length 124 [2019-10-13 20:08:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:50,189 INFO L462 AbstractCegarLoop]: Abstraction has 1958 states and 2746 transitions. [2019-10-13 20:08:50,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2746 transitions. [2019-10-13 20:08:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 20:08:50,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:50,194 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:50,194 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:50,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:50,195 INFO L82 PathProgramCache]: Analyzing trace with hash -855279069, now seen corresponding path program 1 times [2019-10-13 20:08:50,195 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:50,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638949047] [2019-10-13 20:08:50,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:50,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:50,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:50,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638949047] [2019-10-13 20:08:50,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:50,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:50,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124624793] [2019-10-13 20:08:50,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:50,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:50,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:50,331 INFO L87 Difference]: Start difference. First operand 1958 states and 2746 transitions. Second operand 4 states. [2019-10-13 20:08:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:54,712 INFO L93 Difference]: Finished difference Result 7620 states and 10955 transitions. [2019-10-13 20:08:54,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:54,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-13 20:08:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:54,743 INFO L225 Difference]: With dead ends: 7620 [2019-10-13 20:08:54,751 INFO L226 Difference]: Without dead ends: 5668 [2019-10-13 20:08:54,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2019-10-13 20:08:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5666. [2019-10-13 20:08:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5666 states. [2019-10-13 20:08:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 7447 transitions. [2019-10-13 20:08:54,928 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 7447 transitions. Word has length 132 [2019-10-13 20:08:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:54,930 INFO L462 AbstractCegarLoop]: Abstraction has 5666 states and 7447 transitions. [2019-10-13 20:08:54,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:54,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 7447 transitions. [2019-10-13 20:08:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-10-13 20:08:54,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:54,950 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, 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] [2019-10-13 20:08:54,953 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1795663703, now seen corresponding path program 1 times [2019-10-13 20:08:54,954 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:54,954 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292533975] [2019-10-13 20:08:54,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:54,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:54,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:55,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292533975] [2019-10-13 20:08:55,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120557871] [2019-10-13 20:08:55,272 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 [2019-10-13 20:08:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:55,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:08:55,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 20:08:55,602 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:55,801 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:08:55,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:08:55,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204632700] [2019-10-13 20:08:55,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:55,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:55,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:55,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:55,805 INFO L87 Difference]: Start difference. First operand 5666 states and 7447 transitions. Second operand 5 states. [2019-10-13 20:09:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:00,494 INFO L93 Difference]: Finished difference Result 11445 states and 15158 transitions. [2019-10-13 20:09:00,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:09:00,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2019-10-13 20:09:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:00,523 INFO L225 Difference]: With dead ends: 11445 [2019-10-13 20:09:00,524 INFO L226 Difference]: Without dead ends: 5785 [2019-10-13 20:09:00,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:09:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2019-10-13 20:09:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5458. [2019-10-13 20:09:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5458 states. [2019-10-13 20:09:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 6692 transitions. [2019-10-13 20:09:00,680 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 6692 transitions. Word has length 220 [2019-10-13 20:09:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:00,680 INFO L462 AbstractCegarLoop]: Abstraction has 5458 states and 6692 transitions. [2019-10-13 20:09:00,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:09:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 6692 transitions. [2019-10-13 20:09:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2019-10-13 20:09:00,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:00,689 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:00,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:00,902 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1319110833, now seen corresponding path program 1 times [2019-10-13 20:09:00,903 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:00,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983051033] [2019-10-13 20:09:00,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:00,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:00,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 111 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:01,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983051033] [2019-10-13 20:09:01,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277718503] [2019-10-13 20:09:01,499 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 [2019-10-13 20:09:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:01,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 20:09:01,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:01,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:09:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 20:09:02,111 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:02,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:02,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:02,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:02,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:02,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:02,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:03,263 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:09:03,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-10-13 20:09:03,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29687530] [2019-10-13 20:09:03,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:09:03,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:09:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:09:03,266 INFO L87 Difference]: Start difference. First operand 5458 states and 6692 transitions. Second operand 5 states. [2019-10-13 20:09:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:07,686 INFO L93 Difference]: Finished difference Result 11345 states and 13939 transitions. [2019-10-13 20:09:07,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:07,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 372 [2019-10-13 20:09:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:07,713 INFO L225 Difference]: With dead ends: 11345 [2019-10-13 20:09:07,714 INFO L226 Difference]: Without dead ends: 5893 [2019-10-13 20:09:07,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 740 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:09:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5893 states. [2019-10-13 20:09:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5893 to 5525. [2019-10-13 20:09:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5525 states. [2019-10-13 20:09:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5525 states to 5525 states and 6781 transitions. [2019-10-13 20:09:07,865 INFO L78 Accepts]: Start accepts. Automaton has 5525 states and 6781 transitions. Word has length 372 [2019-10-13 20:09:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:07,867 INFO L462 AbstractCegarLoop]: Abstraction has 5525 states and 6781 transitions. [2019-10-13 20:09:07,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:09:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5525 states and 6781 transitions. [2019-10-13 20:09:07,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2019-10-13 20:09:07,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:07,882 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:08,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:08,154 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1389844065, now seen corresponding path program 1 times [2019-10-13 20:09:08,155 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:08,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28824193] [2019-10-13 20:09:08,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:08,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:08,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:09:08,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28824193] [2019-10-13 20:09:08,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663462591] [2019-10-13 20:09:08,695 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 [2019-10-13 20:09:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:08,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:09:08,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:08,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:08,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:08,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:08,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:08,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:08,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:08,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:08,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms