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-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label19_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:52:22,740 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:52:22,744 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:52:22,762 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:52:22,763 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:52:22,765 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:52:22,766 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:52:22,769 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:52:22,771 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:52:22,775 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:52:22,776 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:52:22,776 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:52:22,779 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:52:22,781 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:52:22,788 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:52:22,789 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:52:22,793 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:52:22,795 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:52:22,799 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:52:22,801 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:52:22,802 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:52:22,803 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:52:22,805 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:52:22,807 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:52:22,807 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:52:22,808 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:52:22,809 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:52:22,810 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:52:22,811 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:52:22,812 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:52:22,812 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:52:22,813 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:52:22,813 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:52:22,813 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:52:22,814 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:52:22,815 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:52:22,815 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-LIM.epf [2018-11-07 18:52:22,830 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:52:22,830 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:52:22,831 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:52:22,831 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:52:22,832 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:52:22,832 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:52:22,832 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:52:22,832 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:52:22,832 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:52:22,833 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:52:22,833 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:52:22,833 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:52:22,833 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:52:22,834 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:52:22,834 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:52:22,834 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:52:22,835 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:52:22,835 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:52:22,835 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:52:22,835 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:52:22,835 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:52:22,836 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:52:22,836 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:52:22,836 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:52:22,836 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:52:22,837 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:52:22,837 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:52:22,837 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:52:22,837 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:52:22,837 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:52:22,838 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:52:22,838 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:52:22,838 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:52:22,838 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:52:22,838 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:52:22,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:52:22,898 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:52:22,902 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:52:22,904 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:52:22,904 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:52:22,905 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label19_true-unreach-call.c [2018-11-07 18:52:22,972 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f1db1da9/f241c0a31a1e4b7f9918489f89a99779/FLAGb84b769e4 [2018-11-07 18:52:23,636 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:52:23,637 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label19_true-unreach-call.c [2018-11-07 18:52:23,658 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f1db1da9/f241c0a31a1e4b7f9918489f89a99779/FLAGb84b769e4 [2018-11-07 18:52:23,677 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f1db1da9/f241c0a31a1e4b7f9918489f89a99779 [2018-11-07 18:52:23,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:52:23,691 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:52:23,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:52:23,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:52:23,698 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:52:23,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:52:23" (1/1) ... [2018-11-07 18:52:23,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d73b804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:23, skipping insertion in model container [2018-11-07 18:52:23,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:52:23" (1/1) ... [2018-11-07 18:52:23,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:52:23,817 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:52:24,516 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:52:24,521 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:52:24,780 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:52:24,806 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:52:24,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24 WrapperNode [2018-11-07 18:52:24,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:52:24,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:52:24,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:52:24,808 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:52:24,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:52:25,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:52:25,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:52:25,014 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:52:25,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (1/1) ... [2018-11-07 18:52:25,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:52:25,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:52:25,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:52:25,163 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:52:25,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (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 18:52:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:52:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:52:25,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:52:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:52:25,239 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:52:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:52:25,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:52:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:52:25,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:52:29,928 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:52:29,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:52:29 BoogieIcfgContainer [2018-11-07 18:52:29,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:52:29,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:52:29,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:52:29,934 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:52:29,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:52:23" (1/3) ... [2018-11-07 18:52:29,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724c0e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:52:29, skipping insertion in model container [2018-11-07 18:52:29,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:24" (2/3) ... [2018-11-07 18:52:29,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724c0e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:52:29, skipping insertion in model container [2018-11-07 18:52:29,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:52:29" (3/3) ... [2018-11-07 18:52:29,938 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label19_true-unreach-call.c [2018-11-07 18:52:29,949 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:52:29,958 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:52:29,976 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:52:30,017 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:52:30,017 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:52:30,018 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:52:30,018 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:52:30,018 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:52:30,018 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:52:30,018 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:52:30,018 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:52:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 18:52:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-07 18:52:30,072 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:30,073 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:30,076 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:30,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2122630385, now seen corresponding path program 1 times [2018-11-07 18:52:30,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:30,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:30,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:30,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:30,140 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:30,916 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:52:31,147 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 18:52:31,150 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:31,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:52:31,150 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:31,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:52:31,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:52:31,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:31,177 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-07 18:52:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:33,109 INFO L93 Difference]: Finished difference Result 855 states and 1508 transitions. [2018-11-07 18:52:33,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:52:33,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2018-11-07 18:52:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:33,134 INFO L225 Difference]: With dead ends: 855 [2018-11-07 18:52:33,135 INFO L226 Difference]: Without dead ends: 541 [2018-11-07 18:52:33,148 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 18:52:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2018-11-07 18:52:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 527. [2018-11-07 18:52:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-11-07 18:52:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 901 transitions. [2018-11-07 18:52:33,251 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 901 transitions. Word has length 194 [2018-11-07 18:52:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:33,252 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 901 transitions. [2018-11-07 18:52:33,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:52:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 901 transitions. [2018-11-07 18:52:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-07 18:52:33,262 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:33,263 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:33,263 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:33,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:33,264 INFO L82 PathProgramCache]: Analyzing trace with hash -618112360, now seen corresponding path program 1 times [2018-11-07 18:52:33,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:33,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:33,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:33,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:33,266 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:33,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:33,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:52:33,697 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:33,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:52:33,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:52:33,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:52:33,704 INFO L87 Difference]: Start difference. First operand 527 states and 901 transitions. Second operand 6 states. [2018-11-07 18:52:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:37,364 INFO L93 Difference]: Finished difference Result 1590 states and 2790 transitions. [2018-11-07 18:52:37,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:52:37,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2018-11-07 18:52:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:37,391 INFO L225 Difference]: With dead ends: 1590 [2018-11-07 18:52:37,392 INFO L226 Difference]: Without dead ends: 1069 [2018-11-07 18:52:37,395 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 18:52:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2018-11-07 18:52:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1024. [2018-11-07 18:52:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-11-07 18:52:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1744 transitions. [2018-11-07 18:52:37,471 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1744 transitions. Word has length 204 [2018-11-07 18:52:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:37,471 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 1744 transitions. [2018-11-07 18:52:37,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:52:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1744 transitions. [2018-11-07 18:52:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-07 18:52:37,479 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:37,480 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:37,480 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:37,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:37,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1363104416, now seen corresponding path program 1 times [2018-11-07 18:52:37,481 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:37,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:37,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:37,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:37,482 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:37,744 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:52:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:37,884 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:37,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 18:52:37,884 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:37,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 18:52:37,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 18:52:37,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 18:52:37,886 INFO L87 Difference]: Start difference. First operand 1024 states and 1744 transitions. Second operand 5 states. [2018-11-07 18:52:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:41,209 INFO L93 Difference]: Finished difference Result 3166 states and 5668 transitions. [2018-11-07 18:52:41,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:52:41,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 205 [2018-11-07 18:52:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:41,230 INFO L225 Difference]: With dead ends: 3166 [2018-11-07 18:52:41,230 INFO L226 Difference]: Without dead ends: 2148 [2018-11-07 18:52:41,236 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:52:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2018-11-07 18:52:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2105. [2018-11-07 18:52:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2105 states. [2018-11-07 18:52:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 3420 transitions. [2018-11-07 18:52:41,321 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 3420 transitions. Word has length 205 [2018-11-07 18:52:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:41,321 INFO L480 AbstractCegarLoop]: Abstraction has 2105 states and 3420 transitions. [2018-11-07 18:52:41,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 18:52:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 3420 transitions. [2018-11-07 18:52:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-07 18:52:41,331 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:41,332 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:41,332 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:41,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:41,332 INFO L82 PathProgramCache]: Analyzing trace with hash 639671669, now seen corresponding path program 1 times [2018-11-07 18:52:41,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:41,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:41,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:41,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:41,334 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:41,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:41,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:52:41,717 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:41,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:52:41,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:52:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:41,718 INFO L87 Difference]: Start difference. First operand 2105 states and 3420 transitions. Second operand 3 states. [2018-11-07 18:52:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:42,885 INFO L93 Difference]: Finished difference Result 4205 states and 6860 transitions. [2018-11-07 18:52:42,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:52:42,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2018-11-07 18:52:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:42,902 INFO L225 Difference]: With dead ends: 4205 [2018-11-07 18:52:42,903 INFO L226 Difference]: Without dead ends: 2106 [2018-11-07 18:52:42,910 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2018-11-07 18:52:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1941. [2018-11-07 18:52:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2018-11-07 18:52:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2865 transitions. [2018-11-07 18:52:42,971 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2865 transitions. Word has length 207 [2018-11-07 18:52:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:42,972 INFO L480 AbstractCegarLoop]: Abstraction has 1941 states and 2865 transitions. [2018-11-07 18:52:42,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:52:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2865 transitions. [2018-11-07 18:52:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-07 18:52:42,979 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:42,980 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:42,980 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:42,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1660323759, now seen corresponding path program 1 times [2018-11-07 18:52:42,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:42,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:42,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:42,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:42,982 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:43,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:43,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:52:43,361 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:43,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:52:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:52:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:52:43,362 INFO L87 Difference]: Start difference. First operand 1941 states and 2865 transitions. Second operand 4 states. [2018-11-07 18:52:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:46,756 INFO L93 Difference]: Finished difference Result 7424 states and 11507 transitions. [2018-11-07 18:52:46,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:52:46,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2018-11-07 18:52:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:46,790 INFO L225 Difference]: With dead ends: 7424 [2018-11-07 18:52:46,790 INFO L226 Difference]: Without dead ends: 5489 [2018-11-07 18:52:46,801 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 18:52:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5489 states. [2018-11-07 18:52:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5489 to 5483. [2018-11-07 18:52:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5483 states. [2018-11-07 18:52:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5483 states to 5483 states and 7840 transitions. [2018-11-07 18:52:46,975 INFO L78 Accepts]: Start accepts. Automaton has 5483 states and 7840 transitions. Word has length 209 [2018-11-07 18:52:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:46,976 INFO L480 AbstractCegarLoop]: Abstraction has 5483 states and 7840 transitions. [2018-11-07 18:52:46,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:52:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5483 states and 7840 transitions. [2018-11-07 18:52:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-07 18:52:46,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:46,995 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:46,995 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:46,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:46,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1172684700, now seen corresponding path program 1 times [2018-11-07 18:52:46,996 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:46,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:46,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:46,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:46,997 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:47,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:52:47,245 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:52:47,246 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2018-11-07 18:52:47,249 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1013], [1015], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:52:47,334 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:52:47,334 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:52:49,137 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:52:49,139 INFO L272 AbstractInterpreter]: Visited 195 different actions 195 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 18:52:49,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:49,184 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:52:50,440 INFO L227 lantSequenceWeakener]: Weakened 207 states. On average, predicates are now at 74.01% of their original sizes. [2018-11-07 18:52:50,440 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:52:51,615 INFO L415 sIntCurrentIteration]: We unified 217 AI predicates to 217 [2018-11-07 18:52:51,615 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:52:51,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:52:51,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [5] total 23 [2018-11-07 18:52:51,616 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:51,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 18:52:51,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 18:52:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:52:51,618 INFO L87 Difference]: Start difference. First operand 5483 states and 7840 transitions. Second operand 20 states. [2018-11-07 18:53:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:53:36,607 INFO L93 Difference]: Finished difference Result 11170 states and 15965 transitions. [2018-11-07 18:53:36,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:53:36,607 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 218 [2018-11-07 18:53:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:53:36,632 INFO L225 Difference]: With dead ends: 11170 [2018-11-07 18:53:36,632 INFO L226 Difference]: Without dead ends: 5693 [2018-11-07 18:53:36,649 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 220 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2018-11-07 18:53:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5693 states. [2018-11-07 18:53:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5693 to 5691. [2018-11-07 18:53:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5691 states. [2018-11-07 18:53:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5691 states to 5691 states and 8058 transitions. [2018-11-07 18:53:36,813 INFO L78 Accepts]: Start accepts. Automaton has 5691 states and 8058 transitions. Word has length 218 [2018-11-07 18:53:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:53:36,813 INFO L480 AbstractCegarLoop]: Abstraction has 5691 states and 8058 transitions. [2018-11-07 18:53:36,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 18:53:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 5691 states and 8058 transitions. [2018-11-07 18:53:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-11-07 18:53:36,832 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:36,833 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:36,833 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:36,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1063849999, now seen corresponding path program 1 times [2018-11-07 18:53:36,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:36,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:36,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:36,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:36,835 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:37,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:37,047 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:53:37,047 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 228 with the following transitions: [2018-11-07 18:53:37,048 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1013], [1015], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:53:37,057 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:53:37,057 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:53:39,678 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:53:39,678 INFO L272 AbstractInterpreter]: Visited 199 different actions 393 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:53:39,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:39,687 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:53:39,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:39,687 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:53:39,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:39,699 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:53:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:39,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:53:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:40,417 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:53:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:41,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:53:41,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-11-07 18:53:41,498 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:53:41,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:53:41,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:53:41,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:53:41,501 INFO L87 Difference]: Start difference. First operand 5691 states and 8058 transitions. Second operand 8 states. [2018-11-07 18:53:47,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:53:47,616 INFO L93 Difference]: Finished difference Result 21745 states and 37333 transitions. [2018-11-07 18:53:47,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:53:47,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 227 [2018-11-07 18:53:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:53:47,769 INFO L225 Difference]: With dead ends: 21745 [2018-11-07 18:53:47,770 INFO L226 Difference]: Without dead ends: 16268 [2018-11-07 18:53:47,836 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:53:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16268 states. [2018-11-07 18:53:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16268 to 15912. [2018-11-07 18:53:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15912 states. [2018-11-07 18:53:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15912 states to 15912 states and 23715 transitions. [2018-11-07 18:53:48,506 INFO L78 Accepts]: Start accepts. Automaton has 15912 states and 23715 transitions. Word has length 227 [2018-11-07 18:53:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:53:48,507 INFO L480 AbstractCegarLoop]: Abstraction has 15912 states and 23715 transitions. [2018-11-07 18:53:48,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:53:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 15912 states and 23715 transitions. [2018-11-07 18:53:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-11-07 18:53:48,579 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:48,580 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:48,580 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:48,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash 631853219, now seen corresponding path program 1 times [2018-11-07 18:53:48,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:48,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:48,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:48,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:48,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:49,637 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 18:53:49,962 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-07 18:53:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:50,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:50,207 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:53:50,208 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 240 with the following transitions: [2018-11-07 18:53:50,208 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1013], [1015], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:53:50,219 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:53:50,219 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:53:52,447 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:53:52,447 INFO L272 AbstractInterpreter]: Visited 198 different actions 390 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:53:52,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:52,486 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:53:54,173 INFO L227 lantSequenceWeakener]: Weakened 91 states. On average, predicates are now at 80.25% of their original sizes. [2018-11-07 18:53:54,176 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:53:56,442 INFO L415 sIntCurrentIteration]: We unified 238 AI predicates to 238 [2018-11-07 18:53:56,442 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:53:56,443 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:53:56,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [10] total 30 [2018-11-07 18:53:56,443 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:53:56,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 18:53:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 18:53:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2018-11-07 18:53:56,444 INFO L87 Difference]: Start difference. First operand 15912 states and 23715 transitions. Second operand 22 states. [2018-11-07 18:55:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:15,526 INFO L93 Difference]: Finished difference Result 32243 states and 48053 transitions. [2018-11-07 18:55:15,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-07 18:55:15,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 239 [2018-11-07 18:55:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:15,604 INFO L225 Difference]: With dead ends: 32243 [2018-11-07 18:55:15,605 INFO L226 Difference]: Without dead ends: 16545 [2018-11-07 18:55:15,652 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 247 GetRequests, 202 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2018-11-07 18:55:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16545 states. [2018-11-07 18:55:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16545 to 16542. [2018-11-07 18:55:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16542 states. [2018-11-07 18:55:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16542 states to 16542 states and 24400 transitions. [2018-11-07 18:55:16,497 INFO L78 Accepts]: Start accepts. Automaton has 16542 states and 24400 transitions. Word has length 239 [2018-11-07 18:55:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:16,497 INFO L480 AbstractCegarLoop]: Abstraction has 16542 states and 24400 transitions. [2018-11-07 18:55:16,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 18:55:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 16542 states and 24400 transitions. [2018-11-07 18:55:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-11-07 18:55:16,561 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:16,561 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:55:16,562 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:16,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:16,562 INFO L82 PathProgramCache]: Analyzing trace with hash -132533247, now seen corresponding path program 1 times [2018-11-07 18:55:16,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:16,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:16,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:16,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:16,564 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 70 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 18:55:17,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:17,086 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:17,086 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 253 with the following transitions: [2018-11-07 18:55:17,087 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1013], [1015], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:17,095 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:17,095 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:19,384 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:55:19,384 INFO L272 AbstractInterpreter]: Visited 200 different actions 395 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:55:19,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:19,393 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:55:19,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:19,393 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:55:19,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:19,405 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:55:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:19,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:55:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:55:20,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:55:20,206 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 18:55:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:55:20,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:55:20,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 18:55:20,768 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:55:20,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:55:20,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:55:20,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:55:20,769 INFO L87 Difference]: Start difference. First operand 16542 states and 24400 transitions. Second operand 9 states. [2018-11-07 18:55:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:26,115 INFO L93 Difference]: Finished difference Result 62778 states and 103417 transitions. [2018-11-07 18:55:26,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:55:26,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 252 [2018-11-07 18:55:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:26,379 INFO L225 Difference]: With dead ends: 62778 [2018-11-07 18:55:26,379 INFO L226 Difference]: Without dead ends: 47080 [2018-11-07 18:55:26,460 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 504 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:55:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47080 states. [2018-11-07 18:55:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47080 to 46501. [2018-11-07 18:55:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46501 states. [2018-11-07 18:55:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46501 states to 46501 states and 70444 transitions. [2018-11-07 18:55:28,226 INFO L78 Accepts]: Start accepts. Automaton has 46501 states and 70444 transitions. Word has length 252 [2018-11-07 18:55:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:28,226 INFO L480 AbstractCegarLoop]: Abstraction has 46501 states and 70444 transitions. [2018-11-07 18:55:28,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:55:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 46501 states and 70444 transitions. [2018-11-07 18:55:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-07 18:55:28,290 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:28,290 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:55:28,290 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:28,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1547866221, now seen corresponding path program 1 times [2018-11-07 18:55:28,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:28,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:28,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:28,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:28,292 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:55:28,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:28,819 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:28,820 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-11-07 18:55:28,820 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1013], [1015], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:28,826 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:28,826 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:32,092 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:55:32,092 INFO L272 AbstractInterpreter]: Visited 199 different actions 592 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:55:32,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:32,098 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:55:32,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:32,098 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:55:32,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:32,108 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:55:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:32,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:55:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:55:32,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:55:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:55:32,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:55:32,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-07 18:55:32,945 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:55:32,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:55:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:55:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:55:32,946 INFO L87 Difference]: Start difference. First operand 46501 states and 70444 transitions. Second operand 6 states. [2018-11-07 18:55:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:36,287 INFO L93 Difference]: Finished difference Result 90110 states and 138430 transitions. [2018-11-07 18:55:36,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:55:36,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 251 [2018-11-07 18:55:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:36,525 INFO L225 Difference]: With dead ends: 90110 [2018-11-07 18:55:36,526 INFO L226 Difference]: Without dead ends: 44463 [2018-11-07 18:55:36,702 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 503 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:55:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44463 states. [2018-11-07 18:55:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44463 to 43750. [2018-11-07 18:55:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43750 states. [2018-11-07 18:55:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43750 states to 43750 states and 61796 transitions. [2018-11-07 18:55:38,396 INFO L78 Accepts]: Start accepts. Automaton has 43750 states and 61796 transitions. Word has length 251 [2018-11-07 18:55:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:38,396 INFO L480 AbstractCegarLoop]: Abstraction has 43750 states and 61796 transitions. [2018-11-07 18:55:38,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:55:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 43750 states and 61796 transitions. [2018-11-07 18:55:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-11-07 18:55:38,449 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:38,450 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:55:38,450 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:38,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash -801272971, now seen corresponding path program 1 times [2018-11-07 18:55:38,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:38,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:38,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:38,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:38,452 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 79 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:55:38,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:38,728 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:38,728 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 265 with the following transitions: [2018-11-07 18:55:38,729 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [36], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1013], [1015], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:38,734 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:38,734 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:41,232 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:55:41,232 INFO L272 AbstractInterpreter]: Visited 200 different actions 596 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:55:41,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:41,240 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:55:41,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:41,240 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:55:41,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:41,249 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:55:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:41,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:55:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 68 proven. 28 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-07 18:55:41,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:55:42,288 WARN L179 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-11-07 18:55:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-07 18:55:42,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:55:42,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-11-07 18:55:42,781 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:55:42,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:55:42,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:55:42,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:55:42,782 INFO L87 Difference]: Start difference. First operand 43750 states and 61796 transitions. Second operand 8 states. [2018-11-07 18:55:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:51,769 INFO L93 Difference]: Finished difference Result 142587 states and 234757 transitions. [2018-11-07 18:55:51,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-07 18:55:51,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 264 [2018-11-07 18:55:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:52,526 INFO L225 Difference]: With dead ends: 142587 [2018-11-07 18:55:52,527 INFO L226 Difference]: Without dead ends: 99891 [2018-11-07 18:55:52,798 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2018-11-07 18:55:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99891 states. [2018-11-07 18:55:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99891 to 94518. [2018-11-07 18:55:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94518 states. [2018-11-07 18:55:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94518 states to 94518 states and 125374 transitions. [2018-11-07 18:55:56,114 INFO L78 Accepts]: Start accepts. Automaton has 94518 states and 125374 transitions. Word has length 264 [2018-11-07 18:55:56,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:56,114 INFO L480 AbstractCegarLoop]: Abstraction has 94518 states and 125374 transitions. [2018-11-07 18:55:56,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:55:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand 94518 states and 125374 transitions. [2018-11-07 18:55:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-11-07 18:55:56,191 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:56,191 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:55:56,192 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:56,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:56,192 INFO L82 PathProgramCache]: Analyzing trace with hash 60933178, now seen corresponding path program 1 times [2018-11-07 18:55:56,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:56,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:56,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:56,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:56,193 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:55:56,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:56,455 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:56,455 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 307 with the following transitions: [2018-11-07 18:55:56,455 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1013], [1015], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:56,460 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:56,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:57,698 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:55:57,698 INFO L272 AbstractInterpreter]: Visited 198 different actions 390 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:55:57,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:57,708 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:55:59,354 INFO L227 lantSequenceWeakener]: Weakened 301 states. On average, predicates are now at 72.7% of their original sizes. [2018-11-07 18:55:59,355 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:55:59,810 INFO L415 sIntCurrentIteration]: We unified 305 AI predicates to 305 [2018-11-07 18:55:59,810 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:55:59,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:55:59,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [5] total 26 [2018-11-07 18:55:59,811 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:55:59,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 18:55:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 18:55:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2018-11-07 18:55:59,812 INFO L87 Difference]: Start difference. First operand 94518 states and 125374 transitions. Second operand 23 states. Received shutdown request... [2018-11-07 18:56:02,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:56:02,652 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:56:02,657 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:56:02,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:56:02 BoogieIcfgContainer [2018-11-07 18:56:02,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:56:02,658 INFO L168 Benchmark]: Toolchain (without parser) took 218968.38 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -932.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-11-07 18:56:02,659 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:56:02,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1114.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:02,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 205.51 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 759.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -885.6 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:02,662 INFO L168 Benchmark]: Boogie Preprocessor took 148.75 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:02,662 INFO L168 Benchmark]: RCFGBuilder took 4766.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 256.6 MB). Peak memory consumption was 256.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:02,663 INFO L168 Benchmark]: TraceAbstraction took 212727.86 ms. Allocated memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: 1.4 GB). Free memory was 2.0 GB in the beginning and 2.4 GB in the end (delta: -401.9 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-11-07 18:56:02,668 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1114.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 205.51 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 759.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -885.6 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.75 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4766.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 256.6 MB). Peak memory consumption was 256.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212727.86 ms. Allocated memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: 1.4 GB). Free memory was 2.0 GB in the beginning and 2.4 GB in the end (delta: -401.9 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1596]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1596). Cancelled while BasicCegarLoop was constructing difference of abstraction (94518states) and FLOYD_HOARE automaton (currently 7 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (71 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 212.6s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 166.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2644 SDtfs, 12789 SDslu, 3808 SDs, 0 SdLazy, 26401 SolverSat, 3640 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 101.5s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 2901 GetRequests, 2713 SyntacticMatches, 23 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94518occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 16.2s AbstIntTime, 7 AbstIntIterations, 3 AbstIntStrong, 0.9992331601741276 AbsIntWeakeningRatio, 0.2578947368421053 AbsIntAvgWeakeningVarsNumRemoved, 55.83552631578947 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 8.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 7299 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 3770 NumberOfCodeBlocks, 3770 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 4744 ConstructedInterpolants, 0 QuantifiedInterpolants, 2129243 SizeOfPredicates, 7 NumberOfNonLiveVariables, 4576 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 1063/1139 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown