java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label20_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:50:37,481 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:50:37,483 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:50:37,495 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:50:37,495 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:50:37,496 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:50:37,498 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:50:37,500 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:50:37,502 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:50:37,502 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:50:37,503 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:50:37,504 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:50:37,505 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:50:37,506 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:50:37,510 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:50:37,511 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:50:37,512 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:50:37,516 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:50:37,521 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:50:37,522 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:50:37,527 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:50:37,528 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:50:37,534 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 18:50:37,535 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 18:50:37,535 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 18:50:37,536 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 18:50:37,537 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 18:50:37,538 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 18:50:37,539 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 18:50:37,540 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 18:50:37,540 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 18:50:37,541 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 18:50:37,541 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 18:50:37,541 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 18:50:37,543 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 18:50:37,543 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 18:50:37,544 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 18:50:37,559 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:50:37,560 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:50:37,560 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:50:37,561 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:50:37,561 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:50:37,561 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:50:37,561 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:50:37,562 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:50:37,562 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:50:37,562 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:50:37,562 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:50:37,562 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:50:37,563 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:50:37,563 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:50:37,563 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:50:37,563 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:50:37,564 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:50:37,564 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:50:37,564 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:50:37,564 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:50:37,564 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:50:37,565 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:50:37,565 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:50:37,565 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:50:37,565 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:50:37,565 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:50:37,566 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:50:37,566 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:50:37,566 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:50:37,566 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:50:37,566 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:50:37,567 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:50:37,567 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:50:37,567 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:50:37,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:50:37,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:50:37,627 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:50:37,629 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:50:37,629 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:50:37,630 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label20_false-unreach-call.c [2018-10-24 18:50:37,689 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3892ad826/307d6ad11c5845118f481cf64ae87e4c/FLAG7e4589733 [2018-10-24 18:50:38,416 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:50:38,417 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label20_false-unreach-call.c [2018-10-24 18:50:38,447 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3892ad826/307d6ad11c5845118f481cf64ae87e4c/FLAG7e4589733 [2018-10-24 18:50:38,465 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3892ad826/307d6ad11c5845118f481cf64ae87e4c [2018-10-24 18:50:38,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:50:38,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:50:38,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:50:38,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:50:38,485 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:50:38,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:50:38" (1/1) ... [2018-10-24 18:50:38,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46764b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:38, skipping insertion in model container [2018-10-24 18:50:38,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:50:38" (1/1) ... [2018-10-24 18:50:38,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:50:38,628 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:50:39,630 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:50:39,634 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:50:40,043 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:50:40,065 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:50:40,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40 WrapperNode [2018-10-24 18:50:40,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:50:40,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:50:40,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:50:40,067 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:50:40,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:50:40,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:50:40,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:50:40,564 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:50:40,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... [2018-10-24 18:50:40,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:50:40,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:50:40,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:50:40,891 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:50:40,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 18:50:40,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:50:40,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:50:40,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 18:50:40,966 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 18:50:40,967 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:50:40,967 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:50:40,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:50:40,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:50:40,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:50:40,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:50:51,857 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:50:51,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:50:51 BoogieIcfgContainer [2018-10-24 18:50:51,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:50:51,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:50:51,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:50:51,863 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:50:51,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:50:38" (1/3) ... [2018-10-24 18:50:51,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d91924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:50:51, skipping insertion in model container [2018-10-24 18:50:51,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:40" (2/3) ... [2018-10-24 18:50:51,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d91924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:50:51, skipping insertion in model container [2018-10-24 18:50:51,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:50:51" (3/3) ... [2018-10-24 18:50:51,868 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label20_false-unreach-call.c [2018-10-24 18:50:51,878 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:50:51,888 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:50:51,906 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:50:51,958 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:50:51,958 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:50:51,958 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:50:51,958 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:50:51,959 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:50:51,959 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:50:51,959 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:50:51,959 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:50:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-24 18:50:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-24 18:50:52,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:50:52,006 INFO L375 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] [2018-10-24 18:50:52,009 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:50:52,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:50:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1249764322, now seen corresponding path program 1 times [2018-10-24 18:50:52,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:50:52,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:50:52,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:50:52,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:50:52,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:50:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:50:52,503 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-24 18:50:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:50:52,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:50:52,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:50:52,516 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:50:52,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:50:52,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:50:52,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:50:52,541 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-24 18:51:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:51:02,933 INFO L93 Difference]: Finished difference Result 2137 states and 3966 transitions. [2018-10-24 18:51:02,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:51:02,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-10-24 18:51:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:51:02,984 INFO L225 Difference]: With dead ends: 2137 [2018-10-24 18:51:02,985 INFO L226 Difference]: Without dead ends: 1527 [2018-10-24 18:51:03,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:51:03,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2018-10-24 18:51:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1513. [2018-10-24 18:51:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2018-10-24 18:51:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2344 transitions. [2018-10-24 18:51:03,171 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2344 transitions. Word has length 33 [2018-10-24 18:51:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:51:03,172 INFO L481 AbstractCegarLoop]: Abstraction has 1513 states and 2344 transitions. [2018-10-24 18:51:03,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:51:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2344 transitions. [2018-10-24 18:51:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-24 18:51:03,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:51:03,182 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:51:03,182 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:51:03,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:51:03,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1581854865, now seen corresponding path program 1 times [2018-10-24 18:51:03,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:51:03,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:51:03,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:51:03,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:51:03,185 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:51:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:51:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:51:03,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:51:03,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 18:51:03,491 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:51:03,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 18:51:03,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 18:51:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 18:51:03,493 INFO L87 Difference]: Start difference. First operand 1513 states and 2344 transitions. Second operand 5 states. [2018-10-24 18:51:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:51:12,778 INFO L93 Difference]: Finished difference Result 4413 states and 7007 transitions. [2018-10-24 18:51:12,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:51:12,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2018-10-24 18:51:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:51:12,802 INFO L225 Difference]: With dead ends: 4413 [2018-10-24 18:51:12,802 INFO L226 Difference]: Without dead ends: 2906 [2018-10-24 18:51:12,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 18:51:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2018-10-24 18:51:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2873. [2018-10-24 18:51:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2018-10-24 18:51:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 4204 transitions. [2018-10-24 18:51:12,914 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 4204 transitions. Word has length 105 [2018-10-24 18:51:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:51:12,915 INFO L481 AbstractCegarLoop]: Abstraction has 2873 states and 4204 transitions. [2018-10-24 18:51:12,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 18:51:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 4204 transitions. [2018-10-24 18:51:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-24 18:51:12,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:51:12,919 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:51:12,919 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:51:12,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:51:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash 129577417, now seen corresponding path program 1 times [2018-10-24 18:51:12,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:51:12,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:51:12,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:51:12,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:51:12,921 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:51:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:51:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:51:13,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:51:13,171 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:51:13,172 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 109 with the following transitions: [2018-10-24 18:51:13,174 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [874], [876], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 18:51:13,246 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:51:13,247 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:51:14,604 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:51:36,123 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 18:51:36,124 INFO L272 AbstractInterpreter]: Visited 83 different actions 544 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 18:51:36,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:51:36,139 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 18:51:36,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:51:36,140 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 18:51:36,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:51:36,156 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 18:51:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:51:36,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 18:52:02,922 WARN L179 SmtUtils]: Spent 24.21 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-24 18:52:23,190 WARN L179 SmtUtils]: Spent 16.10 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-24 18:52:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:52:23,516 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 18:52:27,859 WARN L179 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-24 18:52:27,942 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-24 18:52:30,431 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-24 18:52:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:52:30,807 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-24 18:52:30,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-24 18:52:30,807 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:52:30,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:52:30,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:52:30,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=161, Unknown=4, NotChecked=0, Total=210 [2018-10-24 18:52:30,809 INFO L87 Difference]: Start difference. First operand 2873 states and 4204 transitions. Second operand 6 states. [2018-10-24 18:53:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:53:49,809 INFO L93 Difference]: Finished difference Result 11137 states and 17007 transitions. [2018-10-24 18:53:49,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 18:53:49,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2018-10-24 18:53:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:53:49,872 INFO L225 Difference]: With dead ends: 11137 [2018-10-24 18:53:49,872 INFO L226 Difference]: Without dead ends: 8270 [2018-10-24 18:53:49,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=45, Invalid=161, Unknown=4, NotChecked=0, Total=210 [2018-10-24 18:53:49,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8270 states. [2018-10-24 18:53:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8270 to 8235. [2018-10-24 18:53:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8235 states. [2018-10-24 18:53:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8235 states to 8235 states and 11951 transitions. [2018-10-24 18:53:50,166 INFO L78 Accepts]: Start accepts. Automaton has 8235 states and 11951 transitions. Word has length 108 [2018-10-24 18:53:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:53:50,167 INFO L481 AbstractCegarLoop]: Abstraction has 8235 states and 11951 transitions. [2018-10-24 18:53:50,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:53:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 8235 states and 11951 transitions. [2018-10-24 18:53:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-24 18:53:50,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:53:50,179 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:53:50,179 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:53:50,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:53:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash -244022956, now seen corresponding path program 1 times [2018-10-24 18:53:50,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:53:50,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:53:50,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:53:50,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:53:50,182 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:53:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:53:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:53:50,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:53:50,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:53:50,552 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:53:50,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:53:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:53:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:53:50,553 INFO L87 Difference]: Start difference. First operand 8235 states and 11951 transitions. Second operand 6 states. [2018-10-24 18:53:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:53:58,024 INFO L93 Difference]: Finished difference Result 20579 states and 30953 transitions. [2018-10-24 18:53:58,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:53:58,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2018-10-24 18:53:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:53:58,114 INFO L225 Difference]: With dead ends: 20579 [2018-10-24 18:53:58,115 INFO L226 Difference]: Without dead ends: 12350 [2018-10-24 18:53:58,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:53:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12350 states. [2018-10-24 18:53:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12350 to 12254. [2018-10-24 18:53:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12254 states. [2018-10-24 18:53:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12254 states to 12254 states and 16163 transitions. [2018-10-24 18:53:58,529 INFO L78 Accepts]: Start accepts. Automaton has 12254 states and 16163 transitions. Word has length 177 [2018-10-24 18:53:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:53:58,532 INFO L481 AbstractCegarLoop]: Abstraction has 12254 states and 16163 transitions. [2018-10-24 18:53:58,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:53:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 12254 states and 16163 transitions. [2018-10-24 18:53:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-24 18:53:58,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:53:58,539 INFO L375 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, 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] [2018-10-24 18:53:58,539 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:53:58,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:53:58,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1544409704, now seen corresponding path program 1 times [2018-10-24 18:53:58,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:53:58,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:53:58,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:53:58,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:53:58,541 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:53:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:53:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-24 18:53:58,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:53:58,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:53:58,872 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:53:58,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:53:58,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:53:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:53:58,873 INFO L87 Difference]: Start difference. First operand 12254 states and 16163 transitions. Second operand 4 states. [2018-10-24 18:54:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:54:06,999 INFO L93 Difference]: Finished difference Result 40746 states and 55321 transitions. [2018-10-24 18:54:07,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:54:07,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 197 [2018-10-24 18:54:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:54:07,157 INFO L225 Difference]: With dead ends: 40746 [2018-10-24 18:54:07,157 INFO L226 Difference]: Without dead ends: 28498 [2018-10-24 18:54:07,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:54:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28498 states. [2018-10-24 18:54:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28498 to 28491. [2018-10-24 18:54:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28491 states. [2018-10-24 18:54:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28491 states to 28491 states and 35429 transitions. [2018-10-24 18:54:08,313 INFO L78 Accepts]: Start accepts. Automaton has 28491 states and 35429 transitions. Word has length 197 [2018-10-24 18:54:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:54:08,314 INFO L481 AbstractCegarLoop]: Abstraction has 28491 states and 35429 transitions. [2018-10-24 18:54:08,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:54:08,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28491 states and 35429 transitions. [2018-10-24 18:54:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-24 18:54:08,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:54:08,328 INFO L375 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, 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, 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] [2018-10-24 18:54:08,328 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:54:08,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:54:08,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1917962551, now seen corresponding path program 1 times [2018-10-24 18:54:08,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:54:08,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:08,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:54:08,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:08,330 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:54:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:54:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 18:54:09,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:54:09,026 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:54:09,026 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 243 with the following transitions: [2018-10-24 18:54:09,026 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [874], [876], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1435], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 18:54:09,038 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:54:09,038 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:54:10,830 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:54:41,055 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 18:54:41,055 INFO L272 AbstractInterpreter]: Visited 130 different actions 631 times. Merged at 7 different actions 28 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-24 18:54:41,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:54:41,071 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 18:54:41,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:54:41,071 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 18:54:41,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:54:41,090 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 18:54:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:54:41,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 18:54:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 18:54:41,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-10-24 18:54:41,548 WARN L187 SmtUtils]: Removed 1 from assertion stack [2018-10-24 18:54:41,548 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 18:54:41,749 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 18:54:41,750 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 18:54:41,754 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 18:54:41,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 06:54:41 BoogieIcfgContainer [2018-10-24 18:54:41,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 18:54:41,756 INFO L168 Benchmark]: Toolchain (without parser) took 243277.33 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-24 18:54:41,757 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 18:54:41,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1585.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 18:54:41,758 INFO L168 Benchmark]: Boogie Procedure Inliner took 496.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 790.6 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -940.5 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-24 18:54:41,759 INFO L168 Benchmark]: Boogie Preprocessor took 326.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2018-10-24 18:54:41,761 INFO L168 Benchmark]: RCFGBuilder took 10968.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 466.4 MB). Peak memory consumption was 466.4 MB. Max. memory is 7.1 GB. [2018-10-24 18:54:41,762 INFO L168 Benchmark]: TraceAbstraction took 229895.09 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.7 GB in the beginning and 2.9 GB in the end (delta: -1.2 GB). Peak memory consumption was 625.8 MB. Max. memory is 7.1 GB. [2018-10-24 18:54:41,767 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1585.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 496.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 790.6 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -940.5 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 326.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10968.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 466.4 MB). Peak memory consumption was 466.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229895.09 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.7 GB in the beginning and 2.9 GB in the end (delta: -1.2 GB). Peak memory consumption was 625.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 86). Cancelled while BasicCegarLoop was analyzing trace of length 243 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 21. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 229.8s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 114.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1682 SDtfs, 8646 SDslu, 1190 SDs, 0 SdLazy, 13242 SolverSat, 4990 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 108.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 54.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28491occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 55.0s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 5 MinimizatonAttempts, 185 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 55.8s InterpolantComputationTime, 728 NumberOfCodeBlocks, 728 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 829 ConstructedInterpolants, 107 QuantifiedInterpolants, 1131121 SizeOfPredicates, 3 NumberOfNonLiveVariables, 261 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 210/258 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown