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_label36_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 01:59:00,065 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 01:59:00,067 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 01:59:00,080 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 01:59:00,081 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 01:59:00,082 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 01:59:00,083 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 01:59:00,085 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 01:59:00,087 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 01:59:00,088 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 01:59:00,089 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 01:59:00,089 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 01:59:00,090 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 01:59:00,091 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 01:59:00,092 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 01:59:00,093 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 01:59:00,094 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 01:59:00,096 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 01:59:00,098 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 01:59:00,102 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 01:59:00,104 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 01:59:00,107 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 01:59:00,110 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 01:59:00,127 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 [2018-10-25 01:59:00,160 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 01:59:00,161 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 01:59:00,161 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 01:59:00,162 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 01:59:00,163 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 01:59:00,163 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 01:59:00,163 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 01:59:00,163 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 01:59:00,163 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 01:59:00,164 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 01:59:00,164 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 01:59:00,164 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 01:59:00,164 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 01:59:00,164 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 01:59:00,166 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 01:59:00,166 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 01:59:00,166 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 01:59:00,166 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 01:59:00,166 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 01:59:00,166 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 01:59:00,167 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 01:59:00,167 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 01:59:00,167 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 01:59:00,167 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 01:59:00,167 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 01:59:00,169 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 01:59:00,170 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 01:59:00,170 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 01:59:00,170 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 01:59:00,170 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 01:59:00,170 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 01:59:00,171 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 01:59:00,171 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 01:59:00,171 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 01:59:00,172 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 01:59:00,172 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 01:59:00,228 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 01:59:00,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 01:59:00,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 01:59:00,247 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 01:59:00,248 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 01:59:00,249 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label36_true-unreach-call.c [2018-10-25 01:59:00,308 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/31aab1975/bcae19562fca4e879f5ba3ff7b9b904f/FLAG6568bc23f [2018-10-25 01:59:01,155 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 01:59:01,156 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label36_true-unreach-call.c [2018-10-25 01:59:01,190 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/31aab1975/bcae19562fca4e879f5ba3ff7b9b904f/FLAG6568bc23f [2018-10-25 01:59:01,205 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/31aab1975/bcae19562fca4e879f5ba3ff7b9b904f [2018-10-25 01:59:01,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 01:59:01,218 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 01:59:01,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 01:59:01,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 01:59:01,223 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 01:59:01,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:59:01" (1/1) ... [2018-10-25 01:59:01,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcab609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:01, skipping insertion in model container [2018-10-25 01:59:01,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:59:01" (1/1) ... [2018-10-25 01:59:01,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 01:59:01,379 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 01:59:02,505 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:59:02,511 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 01:59:02,907 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:59:02,929 INFO L193 MainTranslator]: Completed translation [2018-10-25 01:59:02,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02 WrapperNode [2018-10-25 01:59:02,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 01:59:02,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 01:59:02,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 01:59:02,931 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 01:59:02,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 01:59:03,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 01:59:03,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 01:59:03,408 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 01:59:03,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (1/1) ... [2018-10-25 01:59:03,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 01:59:03,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 01:59:03,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 01:59:03,643 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 01:59:03,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (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 [2018-10-25 01:59:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 01:59:03,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 01:59:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-25 01:59:03,719 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-25 01:59:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 01:59:03,719 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 01:59:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 01:59:03,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 01:59:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 01:59:03,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 01:59:14,997 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 01:59:14,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:59:14 BoogieIcfgContainer [2018-10-25 01:59:14,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 01:59:15,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 01:59:15,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 01:59:15,006 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 01:59:15,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 01:59:01" (1/3) ... [2018-10-25 01:59:15,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c75a70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:59:15, skipping insertion in model container [2018-10-25 01:59:15,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:59:02" (2/3) ... [2018-10-25 01:59:15,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c75a70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:59:15, skipping insertion in model container [2018-10-25 01:59:15,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:59:14" (3/3) ... [2018-10-25 01:59:15,013 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label36_true-unreach-call.c [2018-10-25 01:59:15,024 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 01:59:15,034 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 01:59:15,054 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 01:59:15,116 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 01:59:15,116 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 01:59:15,117 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 01:59:15,117 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 01:59:15,117 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 01:59:15,117 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 01:59:15,117 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 01:59:15,118 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 01:59:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-25 01:59:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-25 01:59:15,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:59:15,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:59:15,179 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:59:15,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:59:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1923722508, now seen corresponding path program 1 times [2018-10-25 01:59:15,187 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:59:15,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:59:15,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:59:15,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:59:15,247 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:59:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:59:15,811 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-25 01:59:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:59:15,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:59:15,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 01:59:15,832 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:59:15,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 01:59:15,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 01:59:15,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:59:15,857 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-25 01:59:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:59:29,123 INFO L93 Difference]: Finished difference Result 2118 states and 3937 transitions. [2018-10-25 01:59:29,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 01:59:29,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2018-10-25 01:59:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:59:29,169 INFO L225 Difference]: With dead ends: 2118 [2018-10-25 01:59:29,169 INFO L226 Difference]: Without dead ends: 1508 [2018-10-25 01:59:29,178 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 [2018-10-25 01:59:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2018-10-25 01:59:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1039. [2018-10-25 01:59:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-10-25 01:59:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1596 transitions. [2018-10-25 01:59:29,311 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1596 transitions. Word has length 64 [2018-10-25 01:59:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:59:29,313 INFO L481 AbstractCegarLoop]: Abstraction has 1039 states and 1596 transitions. [2018-10-25 01:59:29,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 01:59:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1596 transitions. [2018-10-25 01:59:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-25 01:59:29,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:59:29,329 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, 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] [2018-10-25 01:59:29,330 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:59:29,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:59:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1151590018, now seen corresponding path program 1 times [2018-10-25 01:59:29,331 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:59:29,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:59:29,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:59:29,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:59:29,334 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:59:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:59:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:59:29,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:59:29,936 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:59:29,937 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 140 with the following transitions: [2018-10-25 01:59:29,939 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1122], [1124], [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] [2018-10-25 01:59:30,006 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:59:30,006 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:59:31,971 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:59:31,972 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. [2018-10-25 01:59:32,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:59:32,018 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:59:32,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:59:32,018 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 [2018-10-25 01:59:32,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:59:32,031 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:59:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:59:32,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:59:58,841 WARN L179 SmtUtils]: Spent 24.22 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-25 02:00:19,086 WARN L179 SmtUtils]: Spent 16.09 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-25 02:00:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:00:19,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:00:24,338 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-25 02:00:24,459 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-25 02:00:26,978 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-25 02:00:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:00:27,333 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 02:00:27,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-25 02:00:27,334 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:00:27,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 02:00:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 02:00:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=161, Unknown=4, NotChecked=0, Total=210 [2018-10-25 02:00:27,336 INFO L87 Difference]: Start difference. First operand 1039 states and 1596 transitions. Second operand 6 states. [2018-10-25 02:01:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:01:12,283 INFO L93 Difference]: Finished difference Result 3900 states and 6141 transitions. [2018-10-25 02:01:12,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 02:01:12,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-10-25 02:01:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:01:12,317 INFO L225 Difference]: With dead ends: 3900 [2018-10-25 02:01:12,317 INFO L226 Difference]: Without dead ends: 2867 [2018-10-25 02:01:12,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=45, Invalid=161, Unknown=4, NotChecked=0, Total=210 [2018-10-25 02:01:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2018-10-25 02:01:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2838. [2018-10-25 02:01:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2838 states. [2018-10-25 02:01:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 4209 transitions. [2018-10-25 02:01:12,432 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 4209 transitions. Word has length 139 [2018-10-25 02:01:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:01:12,433 INFO L481 AbstractCegarLoop]: Abstraction has 2838 states and 4209 transitions. [2018-10-25 02:01:12,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 02:01:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 4209 transitions. [2018-10-25 02:01:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-25 02:01:12,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:01:12,442 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, 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] [2018-10-25 02:01:12,442 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:01:12,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1756750855, now seen corresponding path program 1 times [2018-10-25 02:01:12,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:01:12,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:12,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:12,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:12,446 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:01:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:01:12,797 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:01:12,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 02:01:12,797 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:01:12,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 02:01:12,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 02:01:12,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:01:12,799 INFO L87 Difference]: Start difference. First operand 2838 states and 4209 transitions. Second operand 4 states. [2018-10-25 02:01:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:01:19,951 INFO L93 Difference]: Finished difference Result 10465 states and 16113 transitions. [2018-10-25 02:01:19,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 02:01:19,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2018-10-25 02:01:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:01:19,997 INFO L225 Difference]: With dead ends: 10465 [2018-10-25 02:01:19,998 INFO L226 Difference]: Without dead ends: 7633 [2018-10-25 02:01:20,024 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 [2018-10-25 02:01:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2018-10-25 02:01:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 7631. [2018-10-25 02:01:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7631 states. [2018-10-25 02:01:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7631 states to 7631 states and 10960 transitions. [2018-10-25 02:01:20,258 INFO L78 Accepts]: Start accepts. Automaton has 7631 states and 10960 transitions. Word has length 174 [2018-10-25 02:01:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:01:20,259 INFO L481 AbstractCegarLoop]: Abstraction has 7631 states and 10960 transitions. [2018-10-25 02:01:20,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 02:01:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7631 states and 10960 transitions. [2018-10-25 02:01:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-25 02:01:20,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:01:20,265 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, 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] [2018-10-25 02:01:20,265 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:01:20,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:20,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1278645089, now seen corresponding path program 1 times [2018-10-25 02:01:20,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:01:20,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:20,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:20,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:20,270 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:01:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:01:20,674 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:01:20,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-25 02:01:20,674 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:01:20,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 02:01:20,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 02:01:20,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-25 02:01:20,676 INFO L87 Difference]: Start difference. First operand 7631 states and 10960 transitions. Second operand 5 states. [2018-10-25 02:01:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:01:38,085 INFO L93 Difference]: Finished difference Result 23767 states and 35931 transitions. [2018-10-25 02:01:38,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-25 02:01:38,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 202 [2018-10-25 02:01:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:01:38,180 INFO L225 Difference]: With dead ends: 23767 [2018-10-25 02:01:38,181 INFO L226 Difference]: Without dead ends: 16142 [2018-10-25 02:01:38,214 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 [2018-10-25 02:01:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16142 states. [2018-10-25 02:01:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16142 to 16109. [2018-10-25 02:01:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16109 states. [2018-10-25 02:01:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16109 states to 16109 states and 22442 transitions. [2018-10-25 02:01:38,689 INFO L78 Accepts]: Start accepts. Automaton has 16109 states and 22442 transitions. Word has length 202 [2018-10-25 02:01:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:01:38,690 INFO L481 AbstractCegarLoop]: Abstraction has 16109 states and 22442 transitions. [2018-10-25 02:01:38,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 02:01:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16109 states and 22442 transitions. [2018-10-25 02:01:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-25 02:01:38,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:01:38,698 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:01:38,698 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:01:38,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:38,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1543994889, now seen corresponding path program 1 times [2018-10-25 02:01:38,699 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:01:38,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:38,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:38,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:38,700 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:01:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:39,042 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 02:01:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 115 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-25 02:01:39,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:01:39,327 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:01:39,327 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 229 with the following transitions: [2018-10-25 02:01:39,328 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1122], [1124], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1286], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:01:39,335 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:01:39,335 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:01:40,480 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:01:40,480 INFO L272 AbstractInterpreter]: Visited 98 different actions 280 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 02:01:40,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:40,518 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:01:40,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:01:40,518 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 [2018-10-25 02:01:40,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:40,529 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:01:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:40,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:01:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:01:41,189 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:01:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:01:41,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 02:01:41,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-25 02:01:41,428 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 02:01:41,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 02:01:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 02:01:41,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-25 02:01:41,430 INFO L87 Difference]: Start difference. First operand 16109 states and 22442 transitions. Second operand 9 states. [2018-10-25 02:01:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:01:50,396 INFO L93 Difference]: Finished difference Result 32482 states and 45577 transitions. [2018-10-25 02:01:50,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-25 02:01:50,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 228 [2018-10-25 02:01:50,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:01:50,453 INFO L225 Difference]: With dead ends: 32482 [2018-10-25 02:01:50,453 INFO L226 Difference]: Without dead ends: 13703 [2018-10-25 02:01:50,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 454 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-10-25 02:01:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13703 states. [2018-10-25 02:01:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13703 to 13185. [2018-10-25 02:01:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13185 states. [2018-10-25 02:01:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13185 states to 13185 states and 15072 transitions. [2018-10-25 02:01:50,773 INFO L78 Accepts]: Start accepts. Automaton has 13185 states and 15072 transitions. Word has length 228 [2018-10-25 02:01:50,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:01:50,774 INFO L481 AbstractCegarLoop]: Abstraction has 13185 states and 15072 transitions. [2018-10-25 02:01:50,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 02:01:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13185 states and 15072 transitions. [2018-10-25 02:01:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-25 02:01:50,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:01:50,786 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:01:50,786 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:01:50,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:50,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1791930481, now seen corresponding path program 1 times [2018-10-25 02:01:50,787 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:01:50,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:50,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:50,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:50,788 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:01:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-25 02:01:51,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:01:51,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 02:01:51,030 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:01:51,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 02:01:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 02:01:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 02:01:51,032 INFO L87 Difference]: Start difference. First operand 13185 states and 15072 transitions. Second operand 3 states. [2018-10-25 02:01:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:01:57,332 INFO L93 Difference]: Finished difference Result 34180 states and 39848 transitions. [2018-10-25 02:01:57,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 02:01:57,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2018-10-25 02:01:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:01:57,393 INFO L225 Difference]: With dead ends: 34180 [2018-10-25 02:01:57,394 INFO L226 Difference]: Without dead ends: 21001 [2018-10-25 02:01:57,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 02:01:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21001 states. [2018-10-25 02:01:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21001 to 20555. [2018-10-25 02:01:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20555 states. [2018-10-25 02:01:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20555 states to 20555 states and 23605 transitions. [2018-10-25 02:01:57,770 INFO L78 Accepts]: Start accepts. Automaton has 20555 states and 23605 transitions. Word has length 241 [2018-10-25 02:01:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:01:57,770 INFO L481 AbstractCegarLoop]: Abstraction has 20555 states and 23605 transitions. [2018-10-25 02:01:57,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 02:01:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 20555 states and 23605 transitions. [2018-10-25 02:01:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-25 02:01:57,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:01:57,778 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:01:57,779 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:01:57,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:57,779 INFO L82 PathProgramCache]: Analyzing trace with hash 5605251, now seen corresponding path program 1 times [2018-10-25 02:01:57,779 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:01:57,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:57,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:57,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:01:57,780 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:01:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-25 02:01:58,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:01:58,482 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:01:58,482 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 274 with the following transitions: [2018-10-25 02:01:58,482 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1122], [1124], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1435], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:01:58,489 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:01:58,489 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:01:58,891 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:01:58,891 INFO L272 AbstractInterpreter]: Visited 130 different actions 259 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-25 02:01:58,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:01:58,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:01:58,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:01:58,926 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 [2018-10-25 02:01:58,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:01:58,940 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:01:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:01:59,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:01:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-25 02:01:59,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:02:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 119 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:02:00,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 02:02:00,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-10-25 02:02:00,223 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 02:02:00,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 02:02:00,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 02:02:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-10-25 02:02:00,224 INFO L87 Difference]: Start difference. First operand 20555 states and 23605 transitions. Second operand 9 states. [2018-10-25 02:02:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:02:15,255 INFO L93 Difference]: Finished difference Result 67380 states and 81871 transitions. [2018-10-25 02:02:15,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-25 02:02:15,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 273 [2018-10-25 02:02:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:02:15,411 INFO L225 Difference]: With dead ends: 67380 [2018-10-25 02:02:15,411 INFO L226 Difference]: Without dead ends: 43337 [2018-10-25 02:02:15,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 540 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2018-10-25 02:02:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43337 states. [2018-10-25 02:02:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43337 to 39933. [2018-10-25 02:02:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39933 states. [2018-10-25 02:02:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39933 states to 39933 states and 46421 transitions. [2018-10-25 02:02:16,632 INFO L78 Accepts]: Start accepts. Automaton has 39933 states and 46421 transitions. Word has length 273 [2018-10-25 02:02:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:02:16,633 INFO L481 AbstractCegarLoop]: Abstraction has 39933 states and 46421 transitions. [2018-10-25 02:02:16,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 02:02:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 39933 states and 46421 transitions. [2018-10-25 02:02:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-10-25 02:02:16,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:02:16,646 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-25 02:02:16,647 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:02:16,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:02:16,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1791691140, now seen corresponding path program 1 times [2018-10-25 02:02:16,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:02:16,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:02:16,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:02:16,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:02:16,649 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:02:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:02:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 177 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-25 02:02:17,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:02:17,321 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:02:17,321 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 382 with the following transitions: [2018-10-25 02:02:17,322 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1122], [1124], [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], [1435], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:02:17,326 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:02:17,326 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:02:17,700 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:02:17,701 INFO L272 AbstractInterpreter]: Visited 131 different actions 263 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-25 02:02:17,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:02:17,739 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:02:17,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:02:17,739 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 [2018-10-25 02:02:17,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:02:17,754 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:02:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:02:17,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:02:20,049 WARN L179 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2018-10-25 02:02:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-25 02:02:20,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:02:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-10-25 02:02:20,496 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-25 02:02:20,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-10-25 02:02:20,496 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:02:20,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 02:02:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 02:02:20,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-25 02:02:20,498 INFO L87 Difference]: Start difference. First operand 39933 states and 46421 transitions. Second operand 3 states. Received shutdown request... [2018-10-25 02:03:10,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 02:03:10,564 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-25 02:03:10,569 WARN L205 ceAbstractionStarter]: Timeout [2018-10-25 02:03:10,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 02:03:10 BoogieIcfgContainer [2018-10-25 02:03:10,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-25 02:03:10,570 INFO L168 Benchmark]: Toolchain (without parser) took 249353.65 ms. Allocated memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: 1.8 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 383.1 MB. Max. memory is 7.1 GB. [2018-10-25 02:03:10,571 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 02:03:10,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1711.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-25 02:03:10,573 INFO L168 Benchmark]: Boogie Procedure Inliner took 476.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.8 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -921.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-25 02:03:10,576 INFO L168 Benchmark]: Boogie Preprocessor took 234.37 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-25 02:03:10,577 INFO L168 Benchmark]: RCFGBuilder took 11357.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 465.0 MB). Peak memory consumption was 465.0 MB. Max. memory is 7.1 GB. [2018-10-25 02:03:10,578 INFO L168 Benchmark]: TraceAbstraction took 235567.71 ms. Allocated memory was 2.3 GB in the beginning and 3.3 GB in the end (delta: 1.0 GB). Free memory was 1.7 GB in the beginning and 2.8 GB in the end (delta: -1.1 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 02:03:10,585 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1711.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 476.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.8 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -921.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 234.37 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11357.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 465.0 MB). Peak memory consumption was 465.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235567.71 ms. Allocated memory was 2.3 GB in the beginning and 3.3 GB in the end (delta: 1.0 GB). Free memory was 1.7 GB in the beginning and 2.8 GB in the end (delta: -1.1 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 179]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 179). Cancelled while BasicCegarLoop was constructing difference of abstraction (39933states) and FLOYD_HOARE automaton (currently 3 states, 3 states before enhancement),while ReachableStatesComputation was computing reachable states (47629 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 235.4s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 163.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3662 SDtfs, 14352 SDslu, 2139 SDs, 0 SdLazy, 26359 SolverSat, 8247 SolverUnsat, 25 SolverUnknown, 0 SolverNotchecked, 152.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2120 GetRequests, 2041 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 59.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39933occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 4.1s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 7 MinimizatonAttempts, 4901 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 63.0s InterpolantComputationTime, 2723 NumberOfCodeBlocks, 2723 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 3728 ConstructedInterpolants, 291 QuantifiedInterpolants, 5204997 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1802 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 2627/3025 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown