java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label20_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-24 02:22:36,010 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 02:22:36,012 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 02:22:36,024 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 02:22:36,024 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 02:22:36,025 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 02:22:36,026 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 02:22:36,028 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 02:22:36,030 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 02:22:36,031 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 02:22:36,032 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 02:22:36,032 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 02:22:36,033 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 02:22:36,034 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 02:22:36,035 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 02:22:36,036 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 02:22:36,037 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 02:22:36,039 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 02:22:36,044 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 02:22:36,046 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 02:22:36,050 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 02:22:36,052 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 02:22:36,060 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 02:22:36,073 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 02:22:36,073 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 02:22:36,074 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 02:22:36,077 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 02:22:36,077 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 02:22:36,108 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 02:22:36,108 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 02:22:36,109 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 02:22:36,109 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 02:22:36,109 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 02:22:36,110 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 02:22:36,110 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 02:22:36,110 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 02:22:36,110 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 02:22:36,110 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 02:22:36,111 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 02:22:36,111 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 02:22:36,111 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 02:22:36,113 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 02:22:36,113 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 02:22:36,113 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 02:22:36,113 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 02:22:36,113 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 02:22:36,114 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 02:22:36,114 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 02:22:36,114 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 02:22:36,114 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 02:22:36,115 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 02:22:36,116 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 02:22:36,116 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 02:22:36,117 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 02:22:36,117 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 02:22:36,117 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 02:22:36,117 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 02:22:36,117 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 02:22:36,118 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 02:22:36,118 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 02:22:36,118 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 02:22:36,118 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 02:22:36,163 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 02:22:36,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 02:22:36,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 02:22:36,181 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 02:22:36,181 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 02:22:36,182 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label20_true-unreach-call.c [2018-10-24 02:22:36,239 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9cff1049e/0f711b2a7df3405ea106e3b836e5980e/FLAGbf11b83cf [2018-10-24 02:22:37,112 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 02:22:37,113 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label20_true-unreach-call.c [2018-10-24 02:22:37,156 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9cff1049e/0f711b2a7df3405ea106e3b836e5980e/FLAGbf11b83cf [2018-10-24 02:22:37,173 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9cff1049e/0f711b2a7df3405ea106e3b836e5980e [2018-10-24 02:22:37,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 02:22:37,187 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 02:22:37,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 02:22:37,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 02:22:37,193 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 02:22:37,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:22:37" (1/1) ... [2018-10-24 02:22:37,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61da0d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:37, skipping insertion in model container [2018-10-24 02:22:37,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:22:37" (1/1) ... [2018-10-24 02:22:37,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 02:22:37,445 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 02:22:39,450 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 02:22:39,456 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 02:22:40,631 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 02:22:40,690 INFO L193 MainTranslator]: Completed translation [2018-10-24 02:22:40,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40 WrapperNode [2018-10-24 02:22:40,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 02:22:40,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 02:22:40,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 02:22:40,692 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 02:22:40,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:40,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:41,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 02:22:41,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 02:22:41,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 02:22:41,432 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 02:22:41,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:41,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:41,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:41,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:41,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:41,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:41,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... [2018-10-24 02:22:42,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 02:22:42,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 02:22:42,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 02:22:42,006 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 02:22:42,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 02:22:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 02:22:42,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 02:22:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-10-24 02:22:42,078 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-10-24 02:22:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-10-24 02:22:42,079 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-10-24 02:22:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 02:22:42,079 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 02:22:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 02:22:42,079 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 02:22:42,080 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 02:22:42,080 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 02:22:42,081 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 02:22:42,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 02:22:42,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 02:22:42,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 02:22:42,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 02:22:42,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 02:23:00,447 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 02:23:00,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:00 BoogieIcfgContainer [2018-10-24 02:23:00,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 02:23:00,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 02:23:00,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 02:23:00,453 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 02:23:00,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:22:37" (1/3) ... [2018-10-24 02:23:00,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e038b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:00, skipping insertion in model container [2018-10-24 02:23:00,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:40" (2/3) ... [2018-10-24 02:23:00,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e038b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:00, skipping insertion in model container [2018-10-24 02:23:00,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:00" (3/3) ... [2018-10-24 02:23:00,457 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label20_true-unreach-call.c [2018-10-24 02:23:00,467 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 02:23:00,478 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 02:23:00,495 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 02:23:00,568 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 02:23:00,569 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 02:23:00,569 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 02:23:00,569 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 02:23:00,569 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 02:23:00,569 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 02:23:00,569 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 02:23:00,570 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 02:23:00,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states. [2018-10-24 02:23:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 02:23:00,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:23:00,646 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 02:23:00,649 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:23:00,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:23:00,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1661872980, now seen corresponding path program 1 times [2018-10-24 02:23:00,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:23:00,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:23:00,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:23:00,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:23:00,716 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:23:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:23:01,163 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 02:23:01,271 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 02:23:01,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 02:23:01,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 02:23:01,273 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:23:01,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 02:23:01,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 02:23:01,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 02:23:01,300 INFO L87 Difference]: Start difference. First operand 1778 states. Second operand 3 states. [2018-10-24 02:23:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 02:23:19,076 INFO L93 Difference]: Finished difference Result 4999 states and 9420 transitions. [2018-10-24 02:23:19,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 02:23:19,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2018-10-24 02:23:19,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 02:23:19,126 INFO L225 Difference]: With dead ends: 4999 [2018-10-24 02:23:19,127 INFO L226 Difference]: Without dead ends: 3219 [2018-10-24 02:23:19,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 02:23:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2018-10-24 02:23:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3215. [2018-10-24 02:23:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states. [2018-10-24 02:23:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 5845 transitions. [2018-10-24 02:23:19,355 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 5845 transitions. Word has length 50 [2018-10-24 02:23:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 02:23:19,356 INFO L481 AbstractCegarLoop]: Abstraction has 3215 states and 5845 transitions. [2018-10-24 02:23:19,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 02:23:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 5845 transitions. [2018-10-24 02:23:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-24 02:23:19,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:23:19,364 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 02:23:19,364 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:23:19,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:23:19,365 INFO L82 PathProgramCache]: Analyzing trace with hash -425746485, now seen corresponding path program 1 times [2018-10-24 02:23:19,365 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:23:19,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:23:19,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:23:19,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:23:19,367 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:23:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:23:19,777 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 02:23:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 02:23:20,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 02:23:20,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 02:23:20,179 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:23:20,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 02:23:20,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 02:23:20,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 02:23:20,184 INFO L87 Difference]: Start difference. First operand 3215 states and 5845 transitions. Second operand 6 states. [2018-10-24 02:23:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 02:23:48,844 INFO L93 Difference]: Finished difference Result 10761 states and 19769 transitions. [2018-10-24 02:23:48,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 02:23:48,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2018-10-24 02:23:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 02:23:48,898 INFO L225 Difference]: With dead ends: 10761 [2018-10-24 02:23:48,899 INFO L226 Difference]: Without dead ends: 7552 [2018-10-24 02:23:48,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 02:23:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7552 states. [2018-10-24 02:23:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7552 to 7511. [2018-10-24 02:23:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7511 states. [2018-10-24 02:23:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7511 states to 7511 states and 12456 transitions. [2018-10-24 02:23:49,132 INFO L78 Accepts]: Start accepts. Automaton has 7511 states and 12456 transitions. Word has length 122 [2018-10-24 02:23:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 02:23:49,133 INFO L481 AbstractCegarLoop]: Abstraction has 7511 states and 12456 transitions. [2018-10-24 02:23:49,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 02:23:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 7511 states and 12456 transitions. [2018-10-24 02:23:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-24 02:23:49,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:23:49,142 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 02:23:49,142 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:23:49,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:23:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash -314476791, now seen corresponding path program 1 times [2018-10-24 02:23:49,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:23:49,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:23:49,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:23:49,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:23:49,146 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:23:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:23:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 02:23:49,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 02:23:49,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 02:23:49,474 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:23:49,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 02:23:49,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 02:23:49,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 02:23:49,475 INFO L87 Difference]: Start difference. First operand 7511 states and 12456 transitions. Second operand 6 states. [2018-10-24 02:24:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 02:24:33,049 INFO L93 Difference]: Finished difference Result 27120 states and 45932 transitions. [2018-10-24 02:24:33,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 02:24:33,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2018-10-24 02:24:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 02:24:33,165 INFO L225 Difference]: With dead ends: 27120 [2018-10-24 02:24:33,165 INFO L226 Difference]: Without dead ends: 19615 [2018-10-24 02:24:33,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-24 02:24:33,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19615 states. [2018-10-24 02:24:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19615 to 19526. [2018-10-24 02:24:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19526 states. [2018-10-24 02:24:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19526 states to 19526 states and 28800 transitions. [2018-10-24 02:24:33,761 INFO L78 Accepts]: Start accepts. Automaton has 19526 states and 28800 transitions. Word has length 140 [2018-10-24 02:24:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 02:24:33,762 INFO L481 AbstractCegarLoop]: Abstraction has 19526 states and 28800 transitions. [2018-10-24 02:24:33,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 02:24:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 19526 states and 28800 transitions. [2018-10-24 02:24:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-24 02:24:33,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:24:33,773 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 02:24:33,774 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:24:33,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:24:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1766353928, now seen corresponding path program 1 times [2018-10-24 02:24:33,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:24:33,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:24:33,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:24:33,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:24:33,776 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:24:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:24:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 02:24:34,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 02:24:34,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 02:24:34,188 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:24:34,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 02:24:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 02:24:34,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 02:24:34,192 INFO L87 Difference]: Start difference. First operand 19526 states and 28800 transitions. Second operand 5 states. [2018-10-24 02:24:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 02:24:58,578 INFO L93 Difference]: Finished difference Result 60601 states and 95684 transitions. [2018-10-24 02:24:58,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 02:24:58,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2018-10-24 02:24:58,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 02:24:58,752 INFO L225 Difference]: With dead ends: 60601 [2018-10-24 02:24:58,753 INFO L226 Difference]: Without dead ends: 41081 [2018-10-24 02:24:58,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 02:24:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41081 states. [2018-10-24 02:24:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41081 to 40020. [2018-10-24 02:24:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40020 states. [2018-10-24 02:25:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40020 states to 40020 states and 56357 transitions. [2018-10-24 02:25:00,428 INFO L78 Accepts]: Start accepts. Automaton has 40020 states and 56357 transitions. Word has length 185 [2018-10-24 02:25:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 02:25:00,429 INFO L481 AbstractCegarLoop]: Abstraction has 40020 states and 56357 transitions. [2018-10-24 02:25:00,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 02:25:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 40020 states and 56357 transitions. [2018-10-24 02:25:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-24 02:25:00,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:25:00,439 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 02:25:00,440 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:25:00,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:25:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1259026054, now seen corresponding path program 1 times [2018-10-24 02:25:00,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:25:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:25:00,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:25:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:25:00,443 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:25:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:25:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 02:25:00,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 02:25:00,973 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 02:25:00,975 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 206 with the following transitions: [2018-10-24 02:25:00,978 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5526], [5528], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5745], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [6802], [6806], [6810], [6816], [6820], [6822], [6837], [6838], [6839], [6841], [6842] [2018-10-24 02:25:01,065 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 02:25:01,065 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 02:25:03,985 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 02:25:03,987 INFO L272 AbstractInterpreter]: Visited 87 different actions 87 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 02:25:04,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:25:04,001 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 02:25:06,571 INFO L232 lantSequenceWeakener]: Weakened 197 states. On average, predicates are now at 75.71% of their original sizes. [2018-10-24 02:25:06,571 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 02:25:07,004 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 02:25:07,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 02:25:07,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-24 02:25:07,005 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:25:07,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 02:25:07,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 02:25:07,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 02:25:07,007 INFO L87 Difference]: Start difference. First operand 40020 states and 56357 transitions. Second operand 7 states. [2018-10-24 02:25:10,985 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown