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/Problem17_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:33,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:33,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:33,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:33,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:33,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:33,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:33,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:33,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:33,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:33,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:33,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:33,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:33,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:33,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:33,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:33,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:33,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:33,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:33,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:33,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:33,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:33,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:33,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:33,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:10:33,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:33,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:33,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:33,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:33,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:33,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:33,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:33,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:33,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:33,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:33,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:33,996 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 20:10:34,013 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:34,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:34,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:34,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:34,016 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:34,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:34,017 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:34,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:34,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:34,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:34,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:34,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:34,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:34,019 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:34,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:34,019 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:34,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:34,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:34,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:34,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:34,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:34,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:34,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:34,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:34,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:34,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:34,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:34,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:34,023 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 20:10:34,308 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:34,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:34,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:34,334 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:34,334 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:34,335 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2019-10-13 20:10:34,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f9245a44/eed45b2af2d64ae4934e0b4b27c9695d/FLAG779fe24ff [2019-10-13 20:10:35,173 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:35,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2019-10-13 20:10:35,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f9245a44/eed45b2af2d64ae4934e0b4b27c9695d/FLAG779fe24ff [2019-10-13 20:10:35,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f9245a44/eed45b2af2d64ae4934e0b4b27c9695d [2019-10-13 20:10:35,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:35,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:35,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:35,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:35,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:35,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663c421b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35, skipping insertion in model container [2019-10-13 20:10:35,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,334 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:35,452 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:36,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:36,578 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:37,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:37,050 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:37,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37 WrapperNode [2019-10-13 20:10:37,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:37,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:37,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:37,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:37,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:37,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:37,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:37,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:10:37,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (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 20:10:37,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:10:37,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:10:37,363 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:10:37,363 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:10:37,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:10:37,364 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:10:37,364 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:10:37,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:10:37,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:10:37,365 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:10:37,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:10:37,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:10:37,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:10:41,910 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:10:41,910 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:10:41,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:41 BoogieIcfgContainer [2019-10-13 20:10:41,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:10:41,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:10:41,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:10:41,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:10:41,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:35" (1/3) ... [2019-10-13 20:10:41,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac8daed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:41, skipping insertion in model container [2019-10-13 20:10:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (2/3) ... [2019-10-13 20:10:41,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac8daed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:41, skipping insertion in model container [2019-10-13 20:10:41,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:41" (3/3) ... [2019-10-13 20:10:41,922 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label04.c [2019-10-13 20:10:41,933 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:10:41,942 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:10:41,953 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:10:41,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:10:41,985 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:10:41,985 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:10:41,986 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:10:41,986 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:10:41,986 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:10:41,986 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:10:41,986 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:10:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-10-13 20:10:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 20:10:42,023 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:42,024 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] [2019-10-13 20:10:42,026 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1223613225, now seen corresponding path program 1 times [2019-10-13 20:10:42,041 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:42,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284774057] [2019-10-13 20:10:42,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:42,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:42,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:42,319 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 20:10:42,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284774057] [2019-10-13 20:10:42,321 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:42,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:10:42,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776226660] [2019-10-13 20:10:42,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:10:42,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:10:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:10:42,346 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-10-13 20:10:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:49,004 INFO L93 Difference]: Finished difference Result 2133 states and 3962 transitions. [2019-10-13 20:10:49,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:10:49,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-10-13 20:10:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:49,034 INFO L225 Difference]: With dead ends: 2133 [2019-10-13 20:10:49,034 INFO L226 Difference]: Without dead ends: 1451 [2019-10-13 20:10:49,045 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 20:10:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2019-10-13 20:10:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1437. [2019-10-13 20:10:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1437 states. [2019-10-13 20:10:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2166 transitions. [2019-10-13 20:10:49,206 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2166 transitions. Word has length 26 [2019-10-13 20:10:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:49,208 INFO L462 AbstractCegarLoop]: Abstraction has 1437 states and 2166 transitions. [2019-10-13 20:10:49,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:10:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2166 transitions. [2019-10-13 20:10:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 20:10:49,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:49,218 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:49,219 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash -255135052, now seen corresponding path program 1 times [2019-10-13 20:10:49,220 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:49,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309876430] [2019-10-13 20:10:49,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:49,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:49,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:49,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309876430] [2019-10-13 20:10:49,509 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:49,510 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:10:49,510 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793744326] [2019-10-13 20:10:49,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:49,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:10:49,513 INFO L87 Difference]: Start difference. First operand 1437 states and 2166 transitions. Second operand 5 states. [2019-10-13 20:10:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:54,363 INFO L93 Difference]: Finished difference Result 4255 states and 6536 transitions. [2019-10-13 20:10:54,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:54,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2019-10-13 20:10:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:54,386 INFO L225 Difference]: With dead ends: 4255 [2019-10-13 20:10:54,386 INFO L226 Difference]: Without dead ends: 2824 [2019-10-13 20:10:54,392 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 20:10:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2019-10-13 20:10:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2794. [2019-10-13 20:10:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2794 states. [2019-10-13 20:10:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 3921 transitions. [2019-10-13 20:10:54,499 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 3921 transitions. Word has length 97 [2019-10-13 20:10:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:54,500 INFO L462 AbstractCegarLoop]: Abstraction has 2794 states and 3921 transitions. [2019-10-13 20:10:54,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 3921 transitions. [2019-10-13 20:10:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 20:10:54,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:54,508 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:54,508 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash -414121280, now seen corresponding path program 1 times [2019-10-13 20:10:54,510 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:54,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452651030] [2019-10-13 20:10:54,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:54,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:54,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:54,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452651030] [2019-10-13 20:10:54,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365130060] [2019-10-13 20:10:54,743 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 20:10:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:54,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 20:10:54,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:54,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:10:54,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:10:54,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:10:54,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:10:54,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:10:54,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:10:54,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:10:54,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms