java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-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/Problem13_label54_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 00:14:35,629 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 00:14:35,632 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 00:14:35,646 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 00:14:35,646 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 00:14:35,648 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 00:14:35,649 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 00:14:35,651 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 00:14:35,654 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 00:14:35,654 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 00:14:35,655 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 00:14:35,656 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 00:14:35,658 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 00:14:35,659 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 00:14:35,665 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 00:14:35,666 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 00:14:35,667 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 00:14:35,672 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 00:14:35,676 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 00:14:35,678 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 00:14:35,682 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 00:14:35,685 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 00:14:35,688 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 00:14:35,699 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-11-07 00:14:35,729 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 00:14:35,729 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 00:14:35,731 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 00:14:35,731 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 00:14:35,731 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 00:14:35,732 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 00:14:35,732 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 00:14:35,732 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 00:14:35,732 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 00:14:35,732 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 00:14:35,732 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 00:14:35,733 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 00:14:35,734 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 00:14:35,734 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 00:14:35,735 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 00:14:35,736 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 00:14:35,736 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 00:14:35,736 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 00:14:35,736 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 00:14:35,737 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 00:14:35,738 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 00:14:35,738 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 00:14:35,738 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 00:14:35,739 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 00:14:35,739 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 00:14:35,739 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 00:14:35,739 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 00:14:35,739 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 00:14:35,740 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 00:14:35,740 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 00:14:35,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 00:14:35,740 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 00:14:35,740 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 00:14:35,741 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 00:14:35,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 00:14:35,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 00:14:35,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 00:14:35,811 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 00:14:35,812 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 00:14:35,812 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label54_false-unreach-call.c [2018-11-07 00:14:35,877 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2462e333/462c56579b0d4097ad66ff0abf7090b4/FLAG2d79d18b8 [2018-11-07 00:14:36,725 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 00:14:36,726 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label54_false-unreach-call.c [2018-11-07 00:14:36,759 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2462e333/462c56579b0d4097ad66ff0abf7090b4/FLAG2d79d18b8 [2018-11-07 00:14:36,776 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2462e333/462c56579b0d4097ad66ff0abf7090b4 [2018-11-07 00:14:36,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 00:14:36,791 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 00:14:36,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 00:14:36,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 00:14:36,797 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 00:14:36,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:14:36" (1/1) ... [2018-11-07 00:14:36,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad1b696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:36, skipping insertion in model container [2018-11-07 00:14:36,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:14:36" (1/1) ... [2018-11-07 00:14:36,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 00:14:37,006 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 00:14:38,524 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 00:14:38,530 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 00:14:39,319 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 00:14:39,359 INFO L193 MainTranslator]: Completed translation [2018-11-07 00:14:39,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39 WrapperNode [2018-11-07 00:14:39,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 00:14:39,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 00:14:39,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 00:14:39,361 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 00:14:39,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:39,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:39,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 00:14:39,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 00:14:39,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 00:14:39,823 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 00:14:39,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:39,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:39,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:39,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:40,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:40,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:40,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... [2018-11-07 00:14:40,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 00:14:40,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 00:14:40,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 00:14:40,185 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 00:14:40,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 00:14:40,258 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 00:14:40,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 00:14:40,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 00:14:40,258 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 00:14:40,258 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 00:14:40,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 00:14:40,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 00:14:40,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 00:14:40,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 00:14:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 00:14:40,260 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 00:14:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 00:14:40,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 00:14:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 00:14:40,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 00:14:50,016 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 00:14:50,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:14:50 BoogieIcfgContainer [2018-11-07 00:14:50,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 00:14:50,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 00:14:50,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 00:14:50,022 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 00:14:50,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:14:36" (1/3) ... [2018-11-07 00:14:50,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba203d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:14:50, skipping insertion in model container [2018-11-07 00:14:50,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:14:39" (2/3) ... [2018-11-07 00:14:50,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba203d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:14:50, skipping insertion in model container [2018-11-07 00:14:50,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:14:50" (3/3) ... [2018-11-07 00:14:50,027 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label54_false-unreach-call.c [2018-11-07 00:14:50,038 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 00:14:50,048 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 00:14:50,067 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 00:14:50,117 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 00:14:50,118 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 00:14:50,118 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 00:14:50,118 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 00:14:50,118 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 00:14:50,118 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 00:14:50,118 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 00:14:50,119 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 00:14:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-11-07 00:14:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-07 00:14:50,169 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:14:50,170 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] [2018-11-07 00:14:50,173 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:14:50,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:14:50,179 INFO L82 PathProgramCache]: Analyzing trace with hash 840041364, now seen corresponding path program 1 times [2018-11-07 00:14:50,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:14:50,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:14:50,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:14:50,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:14:50,238 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:14:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:14:50,640 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 00:14:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:14:50,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:14:50,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 00:14:50,758 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:14:50,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 00:14:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 00:14:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 00:14:50,787 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 3 states. [2018-11-07 00:14:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:14:59,035 INFO L93 Difference]: Finished difference Result 3097 states and 5707 transitions. [2018-11-07 00:14:59,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 00:14:59,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2018-11-07 00:14:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:14:59,070 INFO L225 Difference]: With dead ends: 3097 [2018-11-07 00:14:59,070 INFO L226 Difference]: Without dead ends: 1975 [2018-11-07 00:14:59,083 INFO L604 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 [2018-11-07 00:14:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2018-11-07 00:14:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1974. [2018-11-07 00:14:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1974 states. [2018-11-07 00:14:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 3284 transitions. [2018-11-07 00:14:59,256 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 3284 transitions. Word has length 34 [2018-11-07 00:14:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:14:59,257 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 3284 transitions. [2018-11-07 00:14:59,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 00:14:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 3284 transitions. [2018-11-07 00:14:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-07 00:14:59,263 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:14:59,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:14:59,264 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:14:59,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:14:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1233820516, now seen corresponding path program 1 times [2018-11-07 00:14:59,265 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:14:59,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:14:59,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:14:59,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:14:59,269 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:14:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:14:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:14:59,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:14:59,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 00:14:59,556 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:14:59,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 00:14:59,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 00:14:59,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 00:14:59,559 INFO L87 Difference]: Start difference. First operand 1974 states and 3284 transitions. Second operand 5 states. [2018-11-07 00:15:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:15:13,154 INFO L93 Difference]: Finished difference Result 5734 states and 9688 transitions. [2018-11-07 00:15:13,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 00:15:13,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2018-11-07 00:15:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:15:13,189 INFO L225 Difference]: With dead ends: 5734 [2018-11-07 00:15:13,190 INFO L226 Difference]: Without dead ends: 3766 [2018-11-07 00:15:13,197 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 00:15:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2018-11-07 00:15:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3681. [2018-11-07 00:15:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3681 states. [2018-11-07 00:15:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 5655 transitions. [2018-11-07 00:15:13,330 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 5655 transitions. Word has length 110 [2018-11-07 00:15:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:15:13,331 INFO L480 AbstractCegarLoop]: Abstraction has 3681 states and 5655 transitions. [2018-11-07 00:15:13,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 00:15:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 5655 transitions. [2018-11-07 00:15:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-07 00:15:13,338 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:15:13,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:15:13,342 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:15:13,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:15:13,343 INFO L82 PathProgramCache]: Analyzing trace with hash 66371656, now seen corresponding path program 1 times [2018-11-07 00:15:13,343 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:15:13,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:15:13,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:15:13,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:15:13,345 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:15:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:15:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:15:13,588 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:15:13,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 00:15:13,588 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:15:13,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 00:15:13,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 00:15:13,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 00:15:13,590 INFO L87 Difference]: Start difference. First operand 3681 states and 5655 transitions. Second operand 5 states. [2018-11-07 00:15:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:15:35,640 INFO L93 Difference]: Finished difference Result 13646 states and 21726 transitions. [2018-11-07 00:15:35,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 00:15:35,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2018-11-07 00:15:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:15:35,720 INFO L225 Difference]: With dead ends: 13646 [2018-11-07 00:15:35,721 INFO L226 Difference]: Without dead ends: 9971 [2018-11-07 00:15:35,748 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 00:15:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2018-11-07 00:15:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 9785. [2018-11-07 00:15:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9785 states. [2018-11-07 00:15:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9785 states to 9785 states and 14483 transitions. [2018-11-07 00:15:36,036 INFO L78 Accepts]: Start accepts. Automaton has 9785 states and 14483 transitions. Word has length 124 [2018-11-07 00:15:36,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:15:36,037 INFO L480 AbstractCegarLoop]: Abstraction has 9785 states and 14483 transitions. [2018-11-07 00:15:36,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 00:15:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 9785 states and 14483 transitions. [2018-11-07 00:15:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-07 00:15:36,042 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:15:36,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:15:36,043 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:15:36,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:15:36,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1350853156, now seen corresponding path program 1 times [2018-11-07 00:15:36,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:15:36,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:15:36,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:15:36,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:15:36,045 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:15:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:15:36,378 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 00:15:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:15:36,462 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:15:36,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 00:15:36,463 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:15:36,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 00:15:36,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 00:15:36,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 00:15:36,464 INFO L87 Difference]: Start difference. First operand 9785 states and 14483 transitions. Second operand 6 states. [2018-11-07 00:15:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:15:48,798 INFO L93 Difference]: Finished difference Result 34112 states and 53602 transitions. [2018-11-07 00:15:48,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 00:15:48,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2018-11-07 00:15:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:15:48,947 INFO L225 Difference]: With dead ends: 34112 [2018-11-07 00:15:48,947 INFO L226 Difference]: Without dead ends: 24333 [2018-11-07 00:15:49,024 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 00:15:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24333 states. [2018-11-07 00:15:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24333 to 24105. [2018-11-07 00:15:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24105 states. [2018-11-07 00:15:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24105 states to 24105 states and 33936 transitions. [2018-11-07 00:15:49,691 INFO L78 Accepts]: Start accepts. Automaton has 24105 states and 33936 transitions. Word has length 142 [2018-11-07 00:15:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:15:49,692 INFO L480 AbstractCegarLoop]: Abstraction has 24105 states and 33936 transitions. [2018-11-07 00:15:49,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 00:15:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 24105 states and 33936 transitions. [2018-11-07 00:15:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-07 00:15:49,697 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:15:49,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:15:49,698 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:15:49,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:15:49,698 INFO L82 PathProgramCache]: Analyzing trace with hash -120384225, now seen corresponding path program 1 times [2018-11-07 00:15:49,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:15:49,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:15:49,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:15:49,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:15:49,700 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:15:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:15:50,000 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 00:15:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:15:50,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:15:50,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 00:15:50,404 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:15:50,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 00:15:50,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 00:15:50,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 00:15:50,405 INFO L87 Difference]: Start difference. First operand 24105 states and 33936 transitions. Second operand 6 states. [2018-11-07 00:15:59,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:15:59,561 INFO L93 Difference]: Finished difference Result 62195 states and 97446 transitions. [2018-11-07 00:15:59,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 00:15:59,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2018-11-07 00:15:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:15:59,762 INFO L225 Difference]: With dead ends: 62195 [2018-11-07 00:15:59,762 INFO L226 Difference]: Without dead ends: 38096 [2018-11-07 00:15:59,826 INFO L604 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 [2018-11-07 00:15:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38096 states. [2018-11-07 00:16:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38096 to 37895. [2018-11-07 00:16:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37895 states. [2018-11-07 00:16:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37895 states to 37895 states and 54134 transitions. [2018-11-07 00:16:00,924 INFO L78 Accepts]: Start accepts. Automaton has 37895 states and 54134 transitions. Word has length 153 [2018-11-07 00:16:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:16:00,925 INFO L480 AbstractCegarLoop]: Abstraction has 37895 states and 54134 transitions. [2018-11-07 00:16:00,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 00:16:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 37895 states and 54134 transitions. [2018-11-07 00:16:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-07 00:16:00,930 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:16:00,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:16:00,931 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:16:00,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:16:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1559015888, now seen corresponding path program 1 times [2018-11-07 00:16:00,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:16:00,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:16:00,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:16:00,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:16:00,933 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:16:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:16:01,227 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 00:16:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:16:01,627 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:16:01,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 00:16:01,628 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:16:01,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 00:16:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 00:16:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 00:16:01,629 INFO L87 Difference]: Start difference. First operand 37895 states and 54134 transitions. Second operand 6 states. [2018-11-07 00:16:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:16:10,308 INFO L93 Difference]: Finished difference Result 82975 states and 122111 transitions. [2018-11-07 00:16:10,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 00:16:10,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2018-11-07 00:16:10,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:16:10,520 INFO L225 Difference]: With dead ends: 82975 [2018-11-07 00:16:10,521 INFO L226 Difference]: Without dead ends: 45086 [2018-11-07 00:16:10,620 INFO L604 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 [2018-11-07 00:16:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45086 states. [2018-11-07 00:16:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45086 to 44985. [2018-11-07 00:16:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44985 states. [2018-11-07 00:16:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44985 states to 44985 states and 61410 transitions. [2018-11-07 00:16:11,605 INFO L78 Accepts]: Start accepts. Automaton has 44985 states and 61410 transitions. Word has length 181 [2018-11-07 00:16:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:16:11,606 INFO L480 AbstractCegarLoop]: Abstraction has 44985 states and 61410 transitions. [2018-11-07 00:16:11,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 00:16:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 44985 states and 61410 transitions. [2018-11-07 00:16:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-11-07 00:16:11,617 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:16:11,617 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:16:11,617 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:16:11,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:16:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1763920798, now seen corresponding path program 1 times [2018-11-07 00:16:11,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:16:11,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:16:11,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:16:11,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:16:11,619 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:16:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:16:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:16:11,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 00:16:11,949 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 00:16:11,950 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 232 with the following transitions: [2018-11-07 00:16:11,953 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2799], [2801], [2804], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3151], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3361], [3365], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-11-07 00:16:12,044 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 00:16:12,044 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 00:16:19,044 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 00:16:19,046 INFO L272 AbstractInterpreter]: Visited 124 different actions 124 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 00:16:19,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:16:19,061 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 00:16:23,793 INFO L227 lantSequenceWeakener]: Weakened 208 states. On average, predicates are now at 71.4% of their original sizes. [2018-11-07 00:16:23,793 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 00:16:25,252 INFO L415 sIntCurrentIteration]: We unified 230 AI predicates to 230 [2018-11-07 00:16:25,252 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 00:16:25,253 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 00:16:25,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 00:16:25,254 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:16:25,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 00:16:25,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 00:16:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-07 00:16:25,255 INFO L87 Difference]: Start difference. First operand 44985 states and 61410 transitions. Second operand 11 states. [2018-11-07 00:16:58,179 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