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/Problem12_label30_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:17:34,534 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:17:34,537 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:17:34,554 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:17:34,554 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:17:34,556 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:17:34,557 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:17:34,562 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:17:34,565 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:17:34,566 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:17:34,569 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:17:34,569 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:17:34,571 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:17:34,572 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:17:34,580 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:17:34,581 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:17:34,584 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:17:34,586 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:17:34,590 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:17:34,595 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:17:34,596 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:17:34,597 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:17:34,602 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 18:17:34,612 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 18:17:34,612 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 18:17:34,613 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 18:17:34,614 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 18:17:34,614 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 18:17:34,636 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:17:34,637 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:17:34,638 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:17:34,642 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:17:34,642 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:17:34,643 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:17:34,643 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:17:34,643 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:17:34,643 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:17:34,643 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:17:34,644 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:17:34,644 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:17:34,646 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:17:34,647 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:17:34,647 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:17:34,647 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:17:34,647 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:17:34,647 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:17:34,648 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:17:34,648 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:17:34,648 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:17:34,648 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:17:34,648 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:17:34,649 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:17:34,649 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:17:34,649 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:17:34,649 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:17:34,649 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:17:34,650 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:17:34,651 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:17:34,651 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:17:34,651 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:17:34,652 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:17:34,652 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:17:34,716 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:17:34,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:17:34,738 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:17:34,740 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:17:34,740 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:17:34,741 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label30_false-unreach-call.c [2018-10-24 18:17:34,810 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e4f0dad1e/3839176c88b849b3af68ad48881e65ce/FLAGb36be0b70 [2018-10-24 18:17:35,635 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:17:35,636 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label30_false-unreach-call.c [2018-10-24 18:17:35,668 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e4f0dad1e/3839176c88b849b3af68ad48881e65ce/FLAGb36be0b70 [2018-10-24 18:17:35,685 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e4f0dad1e/3839176c88b849b3af68ad48881e65ce [2018-10-24 18:17:35,698 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:17:35,700 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:17:35,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:17:35,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:17:35,706 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:17:35,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:17:35" (1/1) ... [2018-10-24 18:17:35,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96182d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:35, skipping insertion in model container [2018-10-24 18:17:35,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:17:35" (1/1) ... [2018-10-24 18:17:35,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:17:35,871 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:17:37,206 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:17:37,211 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:17:37,794 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:17:37,830 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:17:37,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37 WrapperNode [2018-10-24 18:17:37,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:17:37,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:17:37,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:17:37,832 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:17:37,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:37,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:38,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:17:38,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:17:38,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:17:38,357 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:17:38,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:38,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:38,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:38,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:38,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:38,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:38,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (1/1) ... [2018-10-24 18:17:38,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:17:38,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:17:38,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:17:38,671 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:17:38,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (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 18:17:38,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:17:38,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:17:38,741 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 18:17:38,741 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 18:17:38,741 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 18:17:38,741 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 18:17:38,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 18:17:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 18:17:38,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:17:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:17:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:17:38,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:17:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:17:38,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:17:51,747 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:17:51,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:17:51 BoogieIcfgContainer [2018-10-24 18:17:51,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:17:51,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:17:51,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:17:51,752 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:17:51,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:17:35" (1/3) ... [2018-10-24 18:17:51,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722c864a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:17:51, skipping insertion in model container [2018-10-24 18:17:51,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:17:37" (2/3) ... [2018-10-24 18:17:51,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722c864a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:17:51, skipping insertion in model container [2018-10-24 18:17:51,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:17:51" (3/3) ... [2018-10-24 18:17:51,756 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label30_false-unreach-call.c [2018-10-24 18:17:51,767 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:17:51,777 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:17:51,795 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:17:51,842 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:17:51,842 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:17:51,842 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:17:51,842 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:17:51,843 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:17:51,843 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:17:51,843 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:17:51,843 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:17:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-24 18:17:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 18:17:51,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:17:51,911 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] [2018-10-24 18:17:51,913 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:17:51,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:17:51,919 INFO L82 PathProgramCache]: Analyzing trace with hash -145223636, now seen corresponding path program 1 times [2018-10-24 18:17:51,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:17:51,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:51,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:17:51,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:51,974 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:17:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:17:52,394 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-24 18:17:52,403 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 18:17:52,406 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:17:52,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:17:52,406 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:17:52,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:17:52,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:17:52,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:17:52,431 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 4 states. [2018-10-24 18:18:04,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:18:04,964 INFO L93 Difference]: Finished difference Result 3234 states and 6255 transitions. [2018-10-24 18:18:04,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:18:04,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2018-10-24 18:18:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:18:05,006 INFO L225 Difference]: With dead ends: 3234 [2018-10-24 18:18:05,006 INFO L226 Difference]: Without dead ends: 2388 [2018-10-24 18:18:05,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:18:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2018-10-24 18:18:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2388. [2018-10-24 18:18:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2388 states. [2018-10-24 18:18:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 3845 transitions. [2018-10-24 18:18:05,211 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 3845 transitions. Word has length 32 [2018-10-24 18:18:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:18:05,211 INFO L481 AbstractCegarLoop]: Abstraction has 2388 states and 3845 transitions. [2018-10-24 18:18:05,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:18:05,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 3845 transitions. [2018-10-24 18:18:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-24 18:18:05,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:18:05,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:05,224 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:18:05,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:18:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash 552295319, now seen corresponding path program 1 times [2018-10-24 18:18:05,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:18:05,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:05,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:18:05,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:05,230 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:18:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:18:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:18:05,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:18:05,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:18:05,601 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:18:05,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:18:05,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:18:05,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:18:05,604 INFO L87 Difference]: Start difference. First operand 2388 states and 3845 transitions. Second operand 6 states. [2018-10-24 18:18:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:18:21,909 INFO L93 Difference]: Finished difference Result 9463 states and 15573 transitions. [2018-10-24 18:18:21,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:18:21,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-10-24 18:18:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:18:21,971 INFO L225 Difference]: With dead ends: 9463 [2018-10-24 18:18:21,972 INFO L226 Difference]: Without dead ends: 7081 [2018-10-24 18:18:21,987 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 18:18:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2018-10-24 18:18:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 7037. [2018-10-24 18:18:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7037 states. [2018-10-24 18:18:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 10229 transitions. [2018-10-24 18:18:22,221 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 10229 transitions. Word has length 113 [2018-10-24 18:18:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:18:22,222 INFO L481 AbstractCegarLoop]: Abstraction has 7037 states and 10229 transitions. [2018-10-24 18:18:22,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:18:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 10229 transitions. [2018-10-24 18:18:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-24 18:18:22,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:18:22,229 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:22,229 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:18:22,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:18:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1059149049, now seen corresponding path program 1 times [2018-10-24 18:18:22,230 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:18:22,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:22,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:18:22,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:22,231 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:18:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:18:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:18:22,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:18:22,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:18:22,525 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:18:22,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:18:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:18:22,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:18:22,526 INFO L87 Difference]: Start difference. First operand 7037 states and 10229 transitions. Second operand 6 states. [2018-10-24 18:18:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:18:33,751 INFO L93 Difference]: Finished difference Result 23489 states and 35291 transitions. [2018-10-24 18:18:33,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:18:33,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2018-10-24 18:18:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:18:33,856 INFO L225 Difference]: With dead ends: 23489 [2018-10-24 18:18:33,857 INFO L226 Difference]: Without dead ends: 16458 [2018-10-24 18:18:33,907 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 18:18:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16458 states. [2018-10-24 18:18:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16458 to 16369. [2018-10-24 18:18:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16369 states. [2018-10-24 18:18:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16369 states to 16369 states and 22454 transitions. [2018-10-24 18:18:34,321 INFO L78 Accepts]: Start accepts. Automaton has 16369 states and 22454 transitions. Word has length 121 [2018-10-24 18:18:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:18:34,322 INFO L481 AbstractCegarLoop]: Abstraction has 16369 states and 22454 transitions. [2018-10-24 18:18:34,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:18:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 16369 states and 22454 transitions. [2018-10-24 18:18:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-24 18:18:34,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:18:34,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:34,328 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:18:34,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:18:34,328 INFO L82 PathProgramCache]: Analyzing trace with hash -128929438, now seen corresponding path program 1 times [2018-10-24 18:18:34,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:18:34,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:34,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:18:34,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:34,330 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:18:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:18:34,643 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:18:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:18:34,840 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:18:34,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:18:34,841 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:18:34,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:18:34,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:18:34,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:18:34,842 INFO L87 Difference]: Start difference. First operand 16369 states and 22454 transitions. Second operand 6 states. [2018-10-24 18:18:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:18:48,266 INFO L93 Difference]: Finished difference Result 51805 states and 75181 transitions. [2018-10-24 18:18:48,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:18:48,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2018-10-24 18:18:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:18:48,441 INFO L225 Difference]: With dead ends: 51805 [2018-10-24 18:18:48,442 INFO L226 Difference]: Without dead ends: 35442 [2018-10-24 18:18:48,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:18:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35442 states. [2018-10-24 18:18:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35442 to 35319. [2018-10-24 18:18:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35319 states. [2018-10-24 18:18:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35319 states to 35319 states and 49477 transitions. [2018-10-24 18:18:49,425 INFO L78 Accepts]: Start accepts. Automaton has 35319 states and 49477 transitions. Word has length 146 [2018-10-24 18:18:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:18:49,426 INFO L481 AbstractCegarLoop]: Abstraction has 35319 states and 49477 transitions. [2018-10-24 18:18:49,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:18:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 35319 states and 49477 transitions. [2018-10-24 18:18:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-24 18:18:49,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:18:49,440 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, 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] [2018-10-24 18:18:49,440 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:18:49,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:18:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1800636461, now seen corresponding path program 1 times [2018-10-24 18:18:49,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:18:49,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:49,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:18:49,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:49,444 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:18:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:18:49,744 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:18:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 50 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 18:18:50,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:18:50,145 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:18:50,147 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 210 with the following transitions: [2018-10-24 18:18:50,149 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2023], [2025], [2028], [2036], [2044], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2388], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2480], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-24 18:18:50,223 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:18:50,223 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:18:54,334 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:18:54,336 INFO L272 AbstractInterpreter]: Visited 105 different actions 105 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 18:18:54,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:18:54,369 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:18:56,880 INFO L232 lantSequenceWeakener]: Weakened 201 states. On average, predicates are now at 75.33% of their original sizes. [2018-10-24 18:18:56,881 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:18:57,462 INFO L413 sIntCurrentIteration]: We have 208 unified AI predicates [2018-10-24 18:18:57,462 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:18:57,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:18:57,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-10-24 18:18:57,463 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:18:57,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 18:18:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 18:18:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 18:18:57,465 INFO L87 Difference]: Start difference. First operand 35319 states and 49477 transitions. Second operand 8 states. [2018-10-24 18:19:01,906 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:20:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:20:45,789 INFO L93 Difference]: Finished difference Result 71402 states and 99937 transitions. [2018-10-24 18:20:45,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 18:20:45,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 209 [2018-10-24 18:20:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:20:45,901 INFO L225 Difference]: With dead ends: 71402 [2018-10-24 18:20:45,901 INFO L226 Difference]: Without dead ends: 36089 [2018-10-24 18:20:45,950 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 210 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-24 18:20:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36089 states. [2018-10-24 18:20:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36089 to 36087. [2018-10-24 18:20:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36087 states. [2018-10-24 18:20:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36087 states to 36087 states and 50261 transitions. [2018-10-24 18:20:46,586 INFO L78 Accepts]: Start accepts. Automaton has 36087 states and 50261 transitions. Word has length 209 [2018-10-24 18:20:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:20:46,587 INFO L481 AbstractCegarLoop]: Abstraction has 36087 states and 50261 transitions. [2018-10-24 18:20:46,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 18:20:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36087 states and 50261 transitions. [2018-10-24 18:20:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-24 18:20:46,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:20:46,598 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:20:46,598 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:20:46,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:20:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1958314628, now seen corresponding path program 1 times [2018-10-24 18:20:46,600 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:20:46,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:46,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:20:46,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:46,602 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:20:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:20:46,898 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:20:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 51 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-24 18:20:47,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:20:47,156 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:20:47,156 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2018-10-24 18:20:47,156 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2023], [2025], [2028], [2036], [2044], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2384], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2536], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-24 18:20:47,166 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:20:47,166 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:20:53,710 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:20:53,710 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 18:20:53,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:20:53,724 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:20:56,580 INFO L232 lantSequenceWeakener]: Weakened 123 states. On average, predicates are now at 75.81% of their original sizes. [2018-10-24 18:20:56,583 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:21:10,956 INFO L413 sIntCurrentIteration]: We have 221 unified AI predicates [2018-10-24 18:21:10,957 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:21:10,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:21:10,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [8] total 27 [2018-10-24 18:21:10,957 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:21:10,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 18:21:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 18:21:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2018-10-24 18:21:10,959 INFO L87 Difference]: Start difference. First operand 36087 states and 50261 transitions. Second operand 21 states. Received shutdown request... [2018-10-24 18:21:14,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 18:21:14,058 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 18:21:14,063 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 18:21:14,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 06:21:14 BoogieIcfgContainer [2018-10-24 18:21:14,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 18:21:14,064 INFO L168 Benchmark]: Toolchain (without parser) took 218365.72 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 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 467.2 MB. Max. memory is 7.1 GB. [2018-10-24 18:21:14,066 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 18:21:14,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2130.46 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: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-24 18:21:14,070 INFO L168 Benchmark]: Boogie Procedure Inliner took 524.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 800.6 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2018-10-24 18:21:14,072 INFO L168 Benchmark]: Boogie Preprocessor took 313.58 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: 36.5 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2018-10-24 18:21:14,075 INFO L168 Benchmark]: RCFGBuilder took 13077.28 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 180.4 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -179.7 MB). Peak memory consumption was 672.6 MB. Max. memory is 7.1 GB. [2018-10-24 18:21:14,076 INFO L168 Benchmark]: TraceAbstraction took 202314.77 ms. Allocated memory was 2.5 GB in the beginning and 4.1 GB in the end (delta: 1.6 GB). Free memory was 2.4 GB in the beginning and 3.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 467.4 MB. Max. memory is 7.1 GB. [2018-10-24 18:21:14,086 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2130.46 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: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 524.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 800.6 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 313.58 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: 36.5 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13077.28 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 180.4 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -179.7 MB). Peak memory consumption was 672.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202314.77 ms. Allocated memory was 2.5 GB in the beginning and 4.1 GB in the end (delta: 1.6 GB). Free memory was 2.4 GB in the beginning and 3.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 467.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 87). Cancelled while BasicCegarLoop was constructing difference of abstraction (36087states) and FLOYD_HOARE automaton (currently 6 states, 21 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 23 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 840 locations, 1 error locations. TIMEOUT Result, 202.2s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 165.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1637 SDtfs, 15647 SDslu, 779 SDs, 0 SdLazy, 25189 SolverSat, 6799 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 115.8s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 470 GetRequests, 411 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36087occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.7s AbstIntTime, 2 AbstIntIterations, 2 AbstIntStrong, 0.9951156535771917 AbsIntWeakeningRatio, 0.1258741258741259 AbsIntAvgWeakeningVarsNumRemoved, 796.3193473193473 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 5 MinimizatonAttempts, 258 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 843 NumberOfCodeBlocks, 843 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 837 ConstructedInterpolants, 0 QuantifiedInterpolants, 779994 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 250/328 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown