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-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label13_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 12:23:35,792 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 12:23:35,795 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 12:23:35,808 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 12:23:35,808 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 12:23:35,809 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 12:23:35,811 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 12:23:35,813 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 12:23:35,815 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 12:23:35,816 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 12:23:35,818 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 12:23:35,818 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 12:23:35,821 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 12:23:35,822 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 12:23:35,823 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 12:23:35,823 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 12:23:35,827 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 12:23:35,830 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 12:23:35,837 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 12:23:35,841 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 12:23:35,842 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 12:23:35,843 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 12:23:35,846 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 12:23:35,860 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 12:23:35,860 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 12:23:35,861 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 12:23:35,862 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 12:23:35,863 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 12:23:35,893 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 12:23:35,893 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 12:23:35,894 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 12:23:35,894 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 12:23:35,895 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 12:23:35,895 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 12:23:35,896 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 12:23:35,896 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 12:23:35,896 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 12:23:35,896 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 12:23:35,896 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 12:23:35,897 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 12:23:35,897 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 12:23:35,898 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 12:23:35,898 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 12:23:35,898 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 12:23:35,898 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 12:23:35,898 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 12:23:35,899 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 12:23:35,899 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 12:23:35,899 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 12:23:35,899 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 12:23:35,899 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 12:23:35,899 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 12:23:35,900 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 12:23:35,900 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 12:23:35,900 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 12:23:35,900 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 12:23:35,901 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 12:23:35,901 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 12:23:35,901 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 12:23:35,901 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 12:23:35,901 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 12:23:35,902 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 12:23:35,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 12:23:35,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 12:23:35,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 12:23:35,966 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 12:23:35,966 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 12:23:35,967 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label13_false-unreach-call.c [2018-11-07 12:23:36,031 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/958e86e3c/06ae2d948e5846bb97bf3d9a52befa75/FLAG1c66d2023 [2018-11-07 12:23:36,762 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 12:23:36,763 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label13_false-unreach-call.c [2018-11-07 12:23:36,788 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/958e86e3c/06ae2d948e5846bb97bf3d9a52befa75/FLAG1c66d2023 [2018-11-07 12:23:36,804 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/958e86e3c/06ae2d948e5846bb97bf3d9a52befa75 [2018-11-07 12:23:36,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 12:23:36,818 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 12:23:36,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 12:23:36,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 12:23:36,824 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 12:23:36,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:23:36" (1/1) ... [2018-11-07 12:23:36,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301511e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:36, skipping insertion in model container [2018-11-07 12:23:36,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:23:36" (1/1) ... [2018-11-07 12:23:36,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 12:23:36,961 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 12:23:37,995 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:23:38,000 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 12:23:38,468 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:23:38,496 INFO L193 MainTranslator]: Completed translation [2018-11-07 12:23:38,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38 WrapperNode [2018-11-07 12:23:38,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 12:23:38,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 12:23:38,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 12:23:38,498 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 12:23:38,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 12:23:38,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 12:23:38,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 12:23:38,776 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 12:23:38,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (1/1) ... [2018-11-07 12:23:38,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 12:23:38,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 12:23:38,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 12:23:38,988 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 12:23:38,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (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 12:23:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 12:23:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 12:23:39,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 12:23:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 12:23:39,055 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 12:23:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 12:23:39,056 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 12:23:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 12:23:39,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 12:23:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 12:23:39,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 12:23:47,770 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 12:23:47,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:23:47 BoogieIcfgContainer [2018-11-07 12:23:47,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 12:23:47,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 12:23:47,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 12:23:47,777 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 12:23:47,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:23:36" (1/3) ... [2018-11-07 12:23:47,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22dffb59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:23:47, skipping insertion in model container [2018-11-07 12:23:47,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:23:38" (2/3) ... [2018-11-07 12:23:47,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22dffb59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:23:47, skipping insertion in model container [2018-11-07 12:23:47,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:23:47" (3/3) ... [2018-11-07 12:23:47,782 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label13_false-unreach-call.c [2018-11-07 12:23:47,792 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 12:23:47,804 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 12:23:47,824 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 12:23:47,882 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 12:23:47,883 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 12:23:47,883 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 12:23:47,883 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 12:23:47,883 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 12:23:47,883 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 12:23:47,883 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 12:23:47,884 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 12:23:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 12:23:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-07 12:23:47,940 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:23:47,941 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] [2018-11-07 12:23:47,946 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:23:47,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:23:47,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1178650194, now seen corresponding path program 1 times [2018-11-07 12:23:47,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:23:47,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:23:48,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:23:48,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:23:48,000 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:23:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:23:48,426 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 12:23:48,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:23:48,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:23:48,429 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:23:48,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:23:48,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:23:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:23:48,452 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 12:23:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:23:59,677 INFO L93 Difference]: Finished difference Result 2166 states and 4013 transitions. [2018-11-07 12:23:59,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:23:59,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-11-07 12:23:59,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:23:59,727 INFO L225 Difference]: With dead ends: 2166 [2018-11-07 12:23:59,727 INFO L226 Difference]: Without dead ends: 1556 [2018-11-07 12:23:59,739 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:23:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2018-11-07 12:23:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1068. [2018-11-07 12:23:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-11-07 12:23:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1850 transitions. [2018-11-07 12:23:59,883 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1850 transitions. Word has length 37 [2018-11-07 12:23:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:23:59,884 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1850 transitions. [2018-11-07 12:23:59,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:23:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1850 transitions. [2018-11-07 12:23:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-07 12:23:59,891 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:23:59,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:59,892 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:23:59,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:23:59,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1514580025, now seen corresponding path program 1 times [2018-11-07 12:23:59,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:23:59,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:23:59,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:23:59,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:23:59,895 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:23:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:24:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:24:00,257 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:24:00,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:24:00,257 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:24:00,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:24:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:24:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:24:00,260 INFO L87 Difference]: Start difference. First operand 1068 states and 1850 transitions. Second operand 6 states. [2018-11-07 12:24:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:24:06,900 INFO L93 Difference]: Finished difference Result 3059 states and 5419 transitions. [2018-11-07 12:24:06,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:24:06,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-11-07 12:24:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:24:06,926 INFO L225 Difference]: With dead ends: 3059 [2018-11-07 12:24:06,927 INFO L226 Difference]: Without dead ends: 1997 [2018-11-07 12:24:06,931 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 12:24:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-11-07 12:24:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-11-07 12:24:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-11-07 12:24:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3181 transitions. [2018-11-07 12:24:07,016 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3181 transitions. Word has length 113 [2018-11-07 12:24:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:24:07,017 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 3181 transitions. [2018-11-07 12:24:07,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:24:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3181 transitions. [2018-11-07 12:24:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-07 12:24:07,026 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:24:07,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:07,027 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:24:07,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:24:07,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1724480335, now seen corresponding path program 1 times [2018-11-07 12:24:07,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:24:07,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:24:07,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:24:07,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:24:07,029 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:24:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:24:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:24:07,290 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:24:07,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:24:07,291 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:24:07,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:24:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:24:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:24:07,292 INFO L87 Difference]: Start difference. First operand 1975 states and 3181 transitions. Second operand 6 states. [2018-11-07 12:24:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:24:11,541 INFO L93 Difference]: Finished difference Result 4880 states and 7834 transitions. [2018-11-07 12:24:11,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:24:11,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2018-11-07 12:24:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:24:11,562 INFO L225 Difference]: With dead ends: 4880 [2018-11-07 12:24:11,563 INFO L226 Difference]: Without dead ends: 2911 [2018-11-07 12:24:11,573 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 12:24:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-11-07 12:24:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2880. [2018-11-07 12:24:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-07 12:24:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2018-11-07 12:24:11,676 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 117 [2018-11-07 12:24:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:24:11,677 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2018-11-07 12:24:11,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:24:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2018-11-07 12:24:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-07 12:24:11,685 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:24:11,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:11,686 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:24:11,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:24:11,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1253038034, now seen corresponding path program 1 times [2018-11-07 12:24:11,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:24:11,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:24:11,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:24:11,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:24:11,689 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:24:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:24:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:24:11,893 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:24:11,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:24:11,894 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:24:11,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:24:11,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:24:11,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:24:11,896 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand 4 states. [2018-11-07 12:24:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:24:16,907 INFO L93 Difference]: Finished difference Result 5754 states and 7882 transitions. [2018-11-07 12:24:16,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:24:16,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2018-11-07 12:24:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:24:16,922 INFO L225 Difference]: With dead ends: 5754 [2018-11-07 12:24:16,923 INFO L226 Difference]: Without dead ends: 2880 [2018-11-07 12:24:16,935 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:24:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2018-11-07 12:24:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2880. [2018-11-07 12:24:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-07 12:24:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3720 transitions. [2018-11-07 12:24:17,005 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3720 transitions. Word has length 147 [2018-11-07 12:24:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:24:17,006 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3720 transitions. [2018-11-07 12:24:17,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:24:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3720 transitions. [2018-11-07 12:24:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-07 12:24:17,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:24:17,009 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 12:24:17,010 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:24:17,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:24:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 535521912, now seen corresponding path program 1 times [2018-11-07 12:24:17,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:24:17,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:24:17,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:24:17,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:24:17,012 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:24:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:24:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 12:24:17,261 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:24:17,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:24:17,261 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:24:17,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:24:17,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:24:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:24:17,263 INFO L87 Difference]: Start difference. First operand 2880 states and 3720 transitions. Second operand 4 states. [2018-11-07 12:24:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:24:25,480 INFO L93 Difference]: Finished difference Result 11062 states and 14732 transitions. [2018-11-07 12:24:25,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:24:25,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2018-11-07 12:24:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:24:25,525 INFO L225 Difference]: With dead ends: 11062 [2018-11-07 12:24:25,525 INFO L226 Difference]: Without dead ends: 8188 [2018-11-07 12:24:25,538 INFO L604 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 [2018-11-07 12:24:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2018-11-07 12:24:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 8188. [2018-11-07 12:24:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8188 states. [2018-11-07 12:24:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 10116 transitions. [2018-11-07 12:24:25,746 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 10116 transitions. Word has length 201 [2018-11-07 12:24:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:24:25,747 INFO L480 AbstractCegarLoop]: Abstraction has 8188 states and 10116 transitions. [2018-11-07 12:24:25,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:24:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 10116 transitions. [2018-11-07 12:24:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-11-07 12:24:25,755 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:24:25,756 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 12:24:25,756 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:24:25,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:24:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1601051847, now seen corresponding path program 1 times [2018-11-07 12:24:25,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:24:25,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:24:25,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:24:25,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:24:25,758 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:24:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:24:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 60 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 12:24:26,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:24:26,321 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:24:26,322 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2018-11-07 12:24:26,325 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], [906], [908], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 12:24:26,375 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:24:26,375 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:24:26,995 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 12:24:27,648 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 12:24:27,650 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 12:24:27,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:24:27,708 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 12:24:28,995 INFO L227 lantSequenceWeakener]: Weakened 215 states. On average, predicates are now at 75.29% of their original sizes. [2018-11-07 12:24:28,996 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 12:24:29,468 INFO L415 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2018-11-07 12:24:29,472 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 12:24:29,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 12:24:29,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-11-07 12:24:29,473 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:24:29,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 12:24:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 12:24:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 12:24:29,475 INFO L87 Difference]: Start difference. First operand 8188 states and 10116 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown