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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label16_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 23:45:06,916 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 23:45:06,920 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 23:45:06,938 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 23:45:06,939 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 23:45:06,943 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 23:45:06,945 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 23:45:06,947 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 23:45:06,950 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 23:45:06,951 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 23:45:06,960 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 23:45:06,960 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 23:45:06,961 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 23:45:06,964 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 23:45:06,967 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 23:45:06,968 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 23:45:06,969 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 23:45:06,973 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 23:45:06,979 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 23:45:06,980 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 23:45:06,982 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 23:45:06,987 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 23:45:06,991 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 23:45:07,006 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 23:45:07,028 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 23:45:07,029 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 23:45:07,030 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 23:45:07,031 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 23:45:07,031 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 23:45:07,031 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 23:45:07,031 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 23:45:07,032 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 23:45:07,032 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 23:45:07,032 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 23:45:07,032 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 23:45:07,032 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 23:45:07,033 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 23:45:07,033 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 23:45:07,034 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 23:45:07,034 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 23:45:07,035 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 23:45:07,036 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 23:45:07,036 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 23:45:07,036 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 23:45:07,036 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 23:45:07,037 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 23:45:07,037 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 23:45:07,037 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 23:45:07,037 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 23:45:07,037 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 23:45:07,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 23:45:07,038 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 23:45:07,038 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 23:45:07,039 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 23:45:07,039 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 23:45:07,039 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 23:45:07,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 23:45:07,039 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 23:45:07,040 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 23:45:07,041 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 23:45:07,114 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 23:45:07,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 23:45:07,137 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 23:45:07,139 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 23:45:07,139 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 23:45:07,140 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label16_false-unreach-call.c [2018-10-24 23:45:07,211 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/80ae5a896/fd1c6d68059d403b98a92b009142400b/FLAGea5f836d5 [2018-10-24 23:45:07,962 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 23:45:07,963 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label16_false-unreach-call.c [2018-10-24 23:45:07,999 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/80ae5a896/fd1c6d68059d403b98a92b009142400b/FLAGea5f836d5 [2018-10-24 23:45:08,021 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/80ae5a896/fd1c6d68059d403b98a92b009142400b [2018-10-24 23:45:08,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 23:45:08,037 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 23:45:08,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 23:45:08,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 23:45:08,043 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 23:45:08,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:08" (1/1) ... [2018-10-24 23:45:08,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a81e87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:08, skipping insertion in model container [2018-10-24 23:45:08,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:08" (1/1) ... [2018-10-24 23:45:08,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 23:45:08,186 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 23:45:09,162 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:45:09,168 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 23:45:09,631 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:45:09,657 INFO L193 MainTranslator]: Completed translation [2018-10-24 23:45:09,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09 WrapperNode [2018-10-24 23:45:09,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 23:45:09,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 23:45:09,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 23:45:09,660 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 23:45:09,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:09,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:10,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 23:45:10,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 23:45:10,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 23:45:10,133 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 23:45:10,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:10,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:10,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:10,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:10,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:10,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:10,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 23:45:10,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 23:45:10,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 23:45:10,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 23:45:10,362 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 23:45:10,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (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 23:45:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 23:45:10,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 23:45:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 23:45:10,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 23:45:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 23:45:10,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 23:45:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 23:45:10,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 23:45:10,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 23:45:10,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 23:45:23,652 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 23:45:23,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:23 BoogieIcfgContainer [2018-10-24 23:45:23,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 23:45:23,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 23:45:23,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 23:45:23,659 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 23:45:23,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:45:08" (1/3) ... [2018-10-24 23:45:23,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54dcb550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:23, skipping insertion in model container [2018-10-24 23:45:23,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (2/3) ... [2018-10-24 23:45:23,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54dcb550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:23, skipping insertion in model container [2018-10-24 23:45:23,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:23" (3/3) ... [2018-10-24 23:45:23,663 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label16_false-unreach-call.c [2018-10-24 23:45:23,674 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 23:45:23,684 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 23:45:23,702 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 23:45:23,748 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 23:45:23,748 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 23:45:23,748 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 23:45:23,748 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 23:45:23,748 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 23:45:23,749 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 23:45:23,749 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 23:45:23,749 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 23:45:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-24 23:45:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 23:45:23,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:45:23,794 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 23:45:23,797 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:45:23,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:45:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash 375326860, now seen corresponding path program 1 times [2018-10-24 23:45:23,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:45:23,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:23,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:45:23,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:23,868 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:45:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:45:24,315 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 23:45:24,336 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 23:45:24,341 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:45:24,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:45:24,342 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:45:24,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:45:24,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:45:24,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:45:24,370 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-24 23:45:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:45:38,485 INFO L93 Difference]: Finished difference Result 2133 states and 3959 transitions. [2018-10-24 23:45:38,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:45:38,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2018-10-24 23:45:38,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:45:38,521 INFO L225 Difference]: With dead ends: 2133 [2018-10-24 23:45:38,521 INFO L226 Difference]: Without dead ends: 1523 [2018-10-24 23:45:38,535 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 23:45:38,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2018-10-24 23:45:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1516. [2018-10-24 23:45:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2018-10-24 23:45:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2287 transitions. [2018-10-24 23:45:38,689 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2287 transitions. Word has length 32 [2018-10-24 23:45:38,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:45:38,690 INFO L481 AbstractCegarLoop]: Abstraction has 1516 states and 2287 transitions. [2018-10-24 23:45:38,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:45:38,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2287 transitions. [2018-10-24 23:45:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-24 23:45:38,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:45:38,696 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] [2018-10-24 23:45:38,697 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:45:38,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:45:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1506308094, now seen corresponding path program 1 times [2018-10-24 23:45:38,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:45:38,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:38,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:45:38,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:38,699 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:45:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:45:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:45:39,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:45:39,197 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:45:39,199 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 108 with the following transitions: [2018-10-24 23:45:39,201 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], [866], [868], [871], [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 23:45:39,249 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:45:39,249 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:45:41,129 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:45:41,130 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 23:45:41,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:45:41,176 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:45:41,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:45:41,176 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 23:45:41,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:45:41,189 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:45:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:45:41,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:46:08,120 WARN L179 SmtUtils]: Spent 24.29 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-24 23:46:28,469 WARN L179 SmtUtils]: Spent 16.15 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-24 23:46:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:46:28,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:46:31,243 WARN L179 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-24 23:46:31,289 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-24 23:46:33,791 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-24 23:46:34,117 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 23:46:34,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-24 23:46:34,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-24 23:46:34,160 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:46:34,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:46:34,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:46:34,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=162, Unknown=3, NotChecked=0, Total=210 [2018-10-24 23:46:34,162 INFO L87 Difference]: Start difference. First operand 1516 states and 2287 transitions. Second operand 6 states. [2018-10-24 23:46:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:46:54,276 INFO L93 Difference]: Finished difference Result 5733 states and 8872 transitions. [2018-10-24 23:46:54,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 23:46:54,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2018-10-24 23:46:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:46:54,320 INFO L225 Difference]: With dead ends: 5733 [2018-10-24 23:46:54,321 INFO L226 Difference]: Without dead ends: 4223 [2018-10-24 23:46:54,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=45, Invalid=162, Unknown=3, NotChecked=0, Total=210 [2018-10-24 23:46:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2018-10-24 23:46:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4192. [2018-10-24 23:46:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4192 states. [2018-10-24 23:46:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4192 states to 4192 states and 6124 transitions. [2018-10-24 23:46:54,483 INFO L78 Accepts]: Start accepts. Automaton has 4192 states and 6124 transitions. Word has length 107 [2018-10-24 23:46:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:46:54,483 INFO L481 AbstractCegarLoop]: Abstraction has 4192 states and 6124 transitions. [2018-10-24 23:46:54,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:46:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4192 states and 6124 transitions. [2018-10-24 23:46:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-24 23:46:54,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:46:54,500 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, 1, 1] [2018-10-24 23:46:54,500 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:46:54,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:54,500 INFO L82 PathProgramCache]: Analyzing trace with hash -299967781, now seen corresponding path program 1 times [2018-10-24 23:46:54,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:46:54,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:54,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:54,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:54,504 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:46:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:54,795 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 23:46:54,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:46:54,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:46:54,796 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:46:54,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:46:54,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:46:54,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:46:54,797 INFO L87 Difference]: Start difference. First operand 4192 states and 6124 transitions. Second operand 6 states. [2018-10-24 23:47:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:02,908 INFO L93 Difference]: Finished difference Result 12501 states and 19091 transitions. [2018-10-24 23:47:02,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:47:02,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2018-10-24 23:47:02,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:02,982 INFO L225 Difference]: With dead ends: 12501 [2018-10-24 23:47:02,982 INFO L226 Difference]: Without dead ends: 8315 [2018-10-24 23:47:03,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:47:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2018-10-24 23:47:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 8251. [2018-10-24 23:47:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8251 states. [2018-10-24 23:47:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8251 states to 8251 states and 11645 transitions. [2018-10-24 23:47:03,237 INFO L78 Accepts]: Start accepts. Automaton has 8251 states and 11645 transitions. Word has length 148 [2018-10-24 23:47:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:03,238 INFO L481 AbstractCegarLoop]: Abstraction has 8251 states and 11645 transitions. [2018-10-24 23:47:03,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:47:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 8251 states and 11645 transitions. [2018-10-24 23:47:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-24 23:47:03,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:03,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:47:03,245 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:03,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:03,246 INFO L82 PathProgramCache]: Analyzing trace with hash 545253591, now seen corresponding path program 1 times [2018-10-24 23:47:03,246 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:03,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:03,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:03,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:03,247 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:03,936 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 23:47:03,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:47:03,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-24 23:47:03,937 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:47:03,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 23:47:03,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 23:47:03,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 23:47:03,939 INFO L87 Difference]: Start difference. First operand 8251 states and 11645 transitions. Second operand 7 states. [2018-10-24 23:47:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:29,444 INFO L93 Difference]: Finished difference Result 24198 states and 39013 transitions. [2018-10-24 23:47:29,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 23:47:29,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2018-10-24 23:47:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:29,613 INFO L225 Difference]: With dead ends: 24198 [2018-10-24 23:47:29,613 INFO L226 Difference]: Without dead ends: 15953 [2018-10-24 23:47:29,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-24 23:47:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15953 states. [2018-10-24 23:47:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15953 to 15718. [2018-10-24 23:47:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15718 states. [2018-10-24 23:47:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15718 states to 15718 states and 23622 transitions. [2018-10-24 23:47:30,257 INFO L78 Accepts]: Start accepts. Automaton has 15718 states and 23622 transitions. Word has length 166 [2018-10-24 23:47:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:30,258 INFO L481 AbstractCegarLoop]: Abstraction has 15718 states and 23622 transitions. [2018-10-24 23:47:30,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 23:47:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 15718 states and 23622 transitions. [2018-10-24 23:47:30,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-24 23:47:30,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:30,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:47:30,266 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:30,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash -81361675, now seen corresponding path program 1 times [2018-10-24 23:47:30,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:30,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:30,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:30,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:30,268 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:30,566 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:47:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 51 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-24 23:47:31,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:31,006 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:47:31,006 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 191 with the following transitions: [2018-10-24 23:47:31,007 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], [866], [868], [871], [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], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1262], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:47:31,013 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:47:31,013 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:47:31,979 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:47:31,980 INFO L272 AbstractInterpreter]: Visited 92 different actions 262 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 23:47:32,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:32,015 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:47:32,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:32,016 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 23:47:32,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:32,028 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:47:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:32,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:47:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:47:32,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:47:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:47:32,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:47:32,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-24 23:47:32,590 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:47:32,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 23:47:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 23:47:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-24 23:47:32,591 INFO L87 Difference]: Start difference. First operand 15718 states and 23622 transitions. Second operand 9 states. [2018-10-24 23:47:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:40,391 INFO L93 Difference]: Finished difference Result 36850 states and 56501 transitions. [2018-10-24 23:47:40,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 23:47:40,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 190 [2018-10-24 23:47:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:40,484 INFO L225 Difference]: With dead ends: 36850 [2018-10-24 23:47:40,485 INFO L226 Difference]: Without dead ends: 18437 [2018-10-24 23:47:40,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 378 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-24 23:47:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18437 states. [2018-10-24 23:47:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18437 to 18366. [2018-10-24 23:47:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18366 states. [2018-10-24 23:47:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18366 states to 18366 states and 23384 transitions. [2018-10-24 23:47:40,967 INFO L78 Accepts]: Start accepts. Automaton has 18366 states and 23384 transitions. Word has length 190 [2018-10-24 23:47:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:40,968 INFO L481 AbstractCegarLoop]: Abstraction has 18366 states and 23384 transitions. [2018-10-24 23:47:40,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 23:47:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 18366 states and 23384 transitions. [2018-10-24 23:47:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-24 23:47:40,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:40,972 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:47:40,972 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:40,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:40,973 INFO L82 PathProgramCache]: Analyzing trace with hash 252427029, now seen corresponding path program 1 times [2018-10-24 23:47:40,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:40,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:40,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:40,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:40,974 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:47:41,164 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:47:41,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 23:47:41,164 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:47:41,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:47:41,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:47:41,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:47:41,166 INFO L87 Difference]: Start difference. First operand 18366 states and 23384 transitions. Second operand 3 states. [2018-10-24 23:47:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:46,984 INFO L93 Difference]: Finished difference Result 42524 states and 55556 transitions. [2018-10-24 23:47:46,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:47:46,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2018-10-24 23:47:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:47,068 INFO L225 Difference]: With dead ends: 42524 [2018-10-24 23:47:47,068 INFO L226 Difference]: Without dead ends: 22345 [2018-10-24 23:47:47,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:47:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22345 states. [2018-10-24 23:47:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22345 to 22345. [2018-10-24 23:47:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22345 states. [2018-10-24 23:47:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22345 states to 22345 states and 27744 transitions. [2018-10-24 23:47:47,576 INFO L78 Accepts]: Start accepts. Automaton has 22345 states and 27744 transitions. Word has length 207 [2018-10-24 23:47:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:47,577 INFO L481 AbstractCegarLoop]: Abstraction has 22345 states and 27744 transitions. [2018-10-24 23:47:47,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:47:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 22345 states and 27744 transitions. [2018-10-24 23:47:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-24 23:47:47,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:47,582 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, 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] [2018-10-24 23:47:47,583 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:47,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1932178409, now seen corresponding path program 1 times [2018-10-24 23:47:47,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:47,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:47,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:47,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:47,584 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:47,906 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:47:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 98 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 23:47:48,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:48,186 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:47:48,186 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 237 with the following transitions: [2018-10-24 23:47:48,186 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], [866], [868], [871], [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], [1408], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:47:48,192 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:47:48,192 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:47:48,495 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:47:48,495 INFO L272 AbstractInterpreter]: Visited 125 different actions 245 times. Merged at 7 different actions 7 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-24 23:47:48,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:48,528 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:47:48,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:48,528 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:47:48,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:48,542 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:47:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:48,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:47:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 23:47:48,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:47:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 23:47:48,915 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:47:48,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-24 23:47:48,916 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:47:48,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:47:48,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:47:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:47:48,917 INFO L87 Difference]: Start difference. First operand 22345 states and 27744 transitions. Second operand 3 states. [2018-10-24 23:47:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:51,737 INFO L93 Difference]: Finished difference Result 44684 states and 55482 transitions. [2018-10-24 23:47:51,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:47:51,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 236 [2018-10-24 23:47:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:51,796 INFO L225 Difference]: With dead ends: 44684 [2018-10-24 23:47:51,796 INFO L226 Difference]: Without dead ends: 22345 [2018-10-24 23:47:51,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 472 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:47:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22345 states. [2018-10-24 23:47:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22345 to 22345. [2018-10-24 23:47:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22345 states. [2018-10-24 23:47:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22345 states to 22345 states and 27017 transitions. [2018-10-24 23:47:52,462 INFO L78 Accepts]: Start accepts. Automaton has 22345 states and 27017 transitions. Word has length 236 [2018-10-24 23:47:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:52,463 INFO L481 AbstractCegarLoop]: Abstraction has 22345 states and 27017 transitions. [2018-10-24 23:47:52,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:47:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22345 states and 27017 transitions. [2018-10-24 23:47:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-24 23:47:52,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:52,470 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, 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] [2018-10-24 23:47:52,470 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:52,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:52,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1513537681, now seen corresponding path program 1 times [2018-10-24 23:47:52,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:52,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:52,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:52,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:52,472 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 23:47:52,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:52,971 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:47:52,971 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2018-10-24 23:47:52,971 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], [866], [868], [871], [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], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1531], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:47:52,977 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:47:52,978 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:47:53,426 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:47:53,427 INFO L272 AbstractInterpreter]: Visited 147 different actions 293 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-24 23:47:53,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:53,456 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:47:53,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:53,456 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:47:53,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:53,468 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:47:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:53,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:47:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 23:47:53,853 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:47:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 55 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:47:55,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:47:55,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-10-24 23:47:55,180 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:47:55,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 23:47:55,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 23:47:55,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-10-24 23:47:55,182 INFO L87 Difference]: Start difference. First operand 22345 states and 27017 transitions. Second operand 9 states. [2018-10-24 23:48:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:48:22,578 INFO L93 Difference]: Finished difference Result 69450 states and 88947 transitions. [2018-10-24 23:48:22,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 23:48:22,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 258 [2018-10-24 23:48:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:48:22,731 INFO L225 Difference]: With dead ends: 69450 [2018-10-24 23:48:22,731 INFO L226 Difference]: Without dead ends: 45738 [2018-10-24 23:48:22,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 510 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2018-10-24 23:48:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45738 states. [2018-10-24 23:48:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45738 to 40381. [2018-10-24 23:48:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40381 states. [2018-10-24 23:48:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40381 states to 40381 states and 49802 transitions. [2018-10-24 23:48:23,644 INFO L78 Accepts]: Start accepts. Automaton has 40381 states and 49802 transitions. Word has length 258 [2018-10-24 23:48:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:48:23,645 INFO L481 AbstractCegarLoop]: Abstraction has 40381 states and 49802 transitions. [2018-10-24 23:48:23,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 23:48:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 40381 states and 49802 transitions. [2018-10-24 23:48:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-10-24 23:48:23,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:48:23,656 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 23:48:23,656 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:48:23,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash -587228975, now seen corresponding path program 1 times [2018-10-24 23:48:23,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:48:23,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:23,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:23,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:23,658 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:48:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-10-24 23:48:24,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:48:24,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:48:24,494 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:48:24,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:48:24,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:48:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:48:24,495 INFO L87 Difference]: Start difference. First operand 40381 states and 49802 transitions. Second operand 4 states. [2018-10-24 23:48:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:48:35,754 INFO L93 Difference]: Finished difference Result 94100 states and 116330 transitions. [2018-10-24 23:48:35,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:48:35,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 359 [2018-10-24 23:48:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:48:35,898 INFO L225 Difference]: With dead ends: 94100 [2018-10-24 23:48:35,899 INFO L226 Difference]: Without dead ends: 53725 [2018-10-24 23:48:35,975 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 23:48:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53725 states. [2018-10-24 23:48:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53725 to 53238. [2018-10-24 23:48:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53238 states. [2018-10-24 23:48:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53238 states to 53238 states and 64164 transitions. [2018-10-24 23:48:36,786 INFO L78 Accepts]: Start accepts. Automaton has 53238 states and 64164 transitions. Word has length 359 [2018-10-24 23:48:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:48:36,786 INFO L481 AbstractCegarLoop]: Abstraction has 53238 states and 64164 transitions. [2018-10-24 23:48:36,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:48:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 53238 states and 64164 transitions. [2018-10-24 23:48:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-10-24 23:48:36,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:48:36,799 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:48:36,799 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:48:36,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:36,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1619090830, now seen corresponding path program 1 times [2018-10-24 23:48:36,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:48:36,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:36,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:36,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:36,801 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:48:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 81 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-24 23:48:37,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:37,639 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:48:37,639 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 367 with the following transitions: [2018-10-24 23:48:37,640 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], [866], [868], [871], [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], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1531], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:48:37,644 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:48:37,644 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:48:38,491 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:48:38,492 INFO L272 AbstractInterpreter]: Visited 148 different actions 297 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:48:38,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:38,516 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:48:38,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:38,516 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-24 23:48:38,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:38,527 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:48:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:38,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:48:38,898 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2018-10-24 23:48:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 23:48:39,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:48:39,338 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 23:48:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 23:48:39,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:48:39,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-10-24 23:48:39,571 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:48:39,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 23:48:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 23:48:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-10-24 23:48:39,572 INFO L87 Difference]: Start difference. First operand 53238 states and 64164 transitions. Second operand 9 states. [2018-10-24 23:49:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:49:04,653 INFO L93 Difference]: Finished difference Result 161087 states and 193755 transitions. [2018-10-24 23:49:04,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 23:49:04,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 366 [2018-10-24 23:49:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:49:04,931 INFO L225 Difference]: With dead ends: 161087 [2018-10-24 23:49:04,931 INFO L226 Difference]: Without dead ends: 94092 [2018-10-24 23:49:05,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 743 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2018-10-24 23:49:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94092 states. [2018-10-24 23:49:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94092 to 82306. [2018-10-24 23:49:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82306 states. [2018-10-24 23:49:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82306 states to 82306 states and 97318 transitions. [2018-10-24 23:49:06,529 INFO L78 Accepts]: Start accepts. Automaton has 82306 states and 97318 transitions. Word has length 366 [2018-10-24 23:49:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:49:06,530 INFO L481 AbstractCegarLoop]: Abstraction has 82306 states and 97318 transitions. [2018-10-24 23:49:06,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 23:49:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 82306 states and 97318 transitions. [2018-10-24 23:49:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-24 23:49:06,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:49:06,544 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:06,544 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:49:06,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:49:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1485816278, now seen corresponding path program 1 times [2018-10-24 23:49:06,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:49:06,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:49:06,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:49:06,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:49:06,546 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:49:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:49:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 79 proven. 17 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-10-24 23:49:07,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:49:07,138 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:49:07,138 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 369 with the following transitions: [2018-10-24 23:49:07,139 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], [866], [868], [871], [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], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1531], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:49:07,142 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:49:07,143 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:49:07,783 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:49:07,784 INFO L272 AbstractInterpreter]: Visited 148 different actions 297 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:49:07,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:49:07,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:49:07,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:49:07,812 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:49:07,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:49:07,829 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:49:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:49:07,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:49:10,255 WARN L179 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 83 DAG size of output: 24 [2018-10-24 23:49:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 280 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-24 23:49:10,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:49:11,527 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 Received shutdown request... [2018-10-24 23:49:11,641 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 23:49:11,842 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:49:11,842 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 23:49:11,848 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 23:49:11,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:49:11 BoogieIcfgContainer [2018-10-24 23:49:11,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 23:49:11,849 INFO L168 Benchmark]: Toolchain (without parser) took 243813.60 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 604.5 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:11,850 INFO L168 Benchmark]: CDTParser took 0.19 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 23:49:11,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1620.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:11,851 INFO L168 Benchmark]: Boogie Procedure Inliner took 472.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.1 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:11,852 INFO L168 Benchmark]: Boogie Preprocessor took 228.87 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:11,853 INFO L168 Benchmark]: RCFGBuilder took 13291.96 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: 459.1 MB). Peak memory consumption was 459.1 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:11,854 INFO L168 Benchmark]: TraceAbstraction took 228193.18 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 3.1 GB in the end (delta: -1.4 GB). Peak memory consumption was 119.5 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:11,859 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1620.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 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 472.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.1 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 228.87 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13291.96 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: 459.1 MB). Peak memory consumption was 459.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 228193.18 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 3.1 GB in the end (delta: -1.4 GB). Peak memory consumption was 119.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 83). Cancelled while BasicCegarLoop was analyzing trace of length 369 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 19 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 228.1s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 149.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4147 SDtfs, 23174 SDslu, 3232 SDs, 0 SdLazy, 37724 SolverSat, 8490 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 132.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2440 GetRequests, 2327 SyntacticMatches, 13 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 57.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82306occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.3s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.6s AutomataMinimizationTime, 10 MinimizatonAttempts, 18038 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 60.3s InterpolantComputationTime, 3226 NumberOfCodeBlocks, 3226 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 4363 ConstructedInterpolants, 206 QuantifiedInterpolants, 4645435 SizeOfPredicates, 8 NumberOfNonLiveVariables, 2133 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 2530/2903 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown