/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 01:57:34,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 01:57:34,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 01:57:34,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 01:57:34,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 01:57:34,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 01:57:34,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 01:57:34,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 01:57:34,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 01:57:34,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 01:57:34,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 01:57:34,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 01:57:34,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 01:57:34,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 01:57:34,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 01:57:34,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 01:57:34,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 01:57:34,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 01:57:34,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 01:57:34,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 01:57:34,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 01:57:34,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 01:57:34,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 01:57:34,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 01:57:34,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 01:57:34,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 01:57:34,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 01:57:34,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 01:57:34,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 01:57:34,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 01:57:34,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 01:57:34,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 01:57:34,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 01:57:34,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 01:57:34,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 01:57:34,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 01:57:34,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 01:57:34,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 01:57:34,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 01:57:34,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 01:57:34,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 01:57:34,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 01:57:34,826 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 01:57:34,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 01:57:34,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 01:57:34,827 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 01:57:34,827 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 01:57:34,827 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 01:57:34,828 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 01:57:34,828 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 01:57:34,828 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 01:57:34,828 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 01:57:34,828 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 01:57:34,828 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 01:57:34,829 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 01:57:34,829 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 01:57:34,829 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 01:57:34,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 01:57:34,830 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 01:57:34,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 01:57:34,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 01:57:34,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 01:57:34,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 01:57:34,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 01:57:34,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 01:57:34,831 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 01:57:34,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 01:57:34,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 01:57:34,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 01:57:34,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 01:57:34,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 01:57:34,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 01:57:34,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 01:57:34,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 01:57:34,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 01:57:34,833 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 01:57:34,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 01:57:34,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 01:57:34,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 01:57:34,834 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 01:57:35,135 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 01:57:35,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 01:57:35,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 01:57:35,159 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 01:57:35,160 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 01:57:35,160 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2019-11-24 01:57:35,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac26ad371/740874f6a12748aea59efa084204ca9d/FLAGba633384b [2019-11-24 01:57:36,015 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 01:57:36,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2019-11-24 01:57:36,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac26ad371/740874f6a12748aea59efa084204ca9d/FLAGba633384b [2019-11-24 01:57:36,525 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac26ad371/740874f6a12748aea59efa084204ca9d [2019-11-24 01:57:36,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 01:57:36,536 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 01:57:36,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 01:57:36,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 01:57:36,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 01:57:36,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:57:36" (1/1) ... [2019-11-24 01:57:36,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5adeab26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:36, skipping insertion in model container [2019-11-24 01:57:36,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:57:36" (1/1) ... [2019-11-24 01:57:36,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 01:57:36,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 01:57:38,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 01:57:38,614 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 01:57:38,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 01:57:39,224 INFO L208 MainTranslator]: Completed translation [2019-11-24 01:57:39,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39 WrapperNode [2019-11-24 01:57:39,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 01:57:39,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 01:57:39,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 01:57:39,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 01:57:39,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 01:57:39,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 01:57:39,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 01:57:39,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 01:57:39,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... [2019-11-24 01:57:39,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 01:57:39,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 01:57:39,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 01:57:39,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 01:57:39,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 01:57:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-24 01:57:39,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-11-24 01:57:39,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-11-24 01:57:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 01:57:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 01:57:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 01:57:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 01:57:39,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 01:57:39,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 01:57:39,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 01:57:39,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 01:57:39,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 01:57:39,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-11-24 01:57:39,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 01:57:39,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 01:58:46,720 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 01:58:46,721 INFO L284 CfgBuilder]: Removed 653 assume(true) statements. [2019-11-24 01:58:46,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:58:46 BoogieIcfgContainer [2019-11-24 01:58:46,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 01:58:46,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 01:58:46,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 01:58:46,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 01:58:46,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:57:36" (1/3) ... [2019-11-24 01:58:46,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b49daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:58:46, skipping insertion in model container [2019-11-24 01:58:46,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:57:39" (2/3) ... [2019-11-24 01:58:46,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b49daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:58:46, skipping insertion in model container [2019-11-24 01:58:46,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:58:46" (3/3) ... [2019-11-24 01:58:46,737 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2019-11-24 01:58:46,751 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 01:58:46,761 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 01:58:46,778 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 01:58:46,818 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 01:58:46,818 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 01:58:46,818 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 01:58:46,818 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 01:58:46,819 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 01:58:46,819 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 01:58:46,819 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 01:58:46,819 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 01:58:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states. [2019-11-24 01:58:46,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-24 01:58:46,866 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:46,867 INFO L410 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] [2019-11-24 01:58:46,867 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:46,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:46,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1167359786, now seen corresponding path program 1 times [2019-11-24 01:58:46,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:46,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42587391] [2019-11-24 01:58:46,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 01:58:47,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42587391] [2019-11-24 01:58:47,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:47,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:47,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026339400] [2019-11-24 01:58:47,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:47,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:47,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:47,447 INFO L87 Difference]: Start difference. First operand 297 states. Second operand 3 states. [2019-11-24 01:58:47,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:47,670 INFO L93 Difference]: Finished difference Result 816 states and 1395 transitions. [2019-11-24 01:58:47,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:47,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2019-11-24 01:58:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:47,707 INFO L225 Difference]: With dead ends: 816 [2019-11-24 01:58:47,707 INFO L226 Difference]: Without dead ends: 540 [2019-11-24 01:58:47,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2019-11-24 01:58:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2019-11-24 01:58:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2019-11-24 01:58:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 869 transitions. [2019-11-24 01:58:47,822 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 869 transitions. Word has length 30 [2019-11-24 01:58:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:47,822 INFO L462 AbstractCegarLoop]: Abstraction has 540 states and 869 transitions. [2019-11-24 01:58:47,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 869 transitions. [2019-11-24 01:58:47,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-24 01:58:47,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:47,825 INFO L410 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] [2019-11-24 01:58:47,825 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:47,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1044388736, now seen corresponding path program 1 times [2019-11-24 01:58:47,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:47,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84352956] [2019-11-24 01:58:47,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 01:58:48,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84352956] [2019-11-24 01:58:48,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:48,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:48,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325695034] [2019-11-24 01:58:48,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:48,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:48,032 INFO L87 Difference]: Start difference. First operand 540 states and 869 transitions. Second operand 4 states. [2019-11-24 01:58:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:48,418 INFO L93 Difference]: Finished difference Result 1049 states and 1687 transitions. [2019-11-24 01:58:48,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 01:58:48,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-11-24 01:58:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:48,426 INFO L225 Difference]: With dead ends: 1049 [2019-11-24 01:58:48,426 INFO L226 Difference]: Without dead ends: 1045 [2019-11-24 01:58:48,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 01:58:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2019-11-24 01:58:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 973. [2019-11-24 01:58:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2019-11-24 01:58:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1587 transitions. [2019-11-24 01:58:48,495 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1587 transitions. Word has length 33 [2019-11-24 01:58:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:48,495 INFO L462 AbstractCegarLoop]: Abstraction has 973 states and 1587 transitions. [2019-11-24 01:58:48,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:58:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1587 transitions. [2019-11-24 01:58:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-24 01:58:48,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:48,507 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-24 01:58:48,507 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash 956313577, now seen corresponding path program 1 times [2019-11-24 01:58:48,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:48,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217907979] [2019-11-24 01:58:48,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:48,800 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2019-11-24 01:58:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 01:58:48,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217907979] [2019-11-24 01:58:48,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:48,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:48,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764814895] [2019-11-24 01:58:48,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:48,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:48,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:48,811 INFO L87 Difference]: Start difference. First operand 973 states and 1587 transitions. Second operand 3 states. [2019-11-24 01:58:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:48,932 INFO L93 Difference]: Finished difference Result 2387 states and 3890 transitions. [2019-11-24 01:58:48,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:48,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2019-11-24 01:58:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:48,941 INFO L225 Difference]: With dead ends: 2387 [2019-11-24 01:58:48,941 INFO L226 Difference]: Without dead ends: 1445 [2019-11-24 01:58:48,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2019-11-24 01:58:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1435. [2019-11-24 01:58:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2019-11-24 01:58:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 2337 transitions. [2019-11-24 01:58:48,991 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 2337 transitions. Word has length 51 [2019-11-24 01:58:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:48,992 INFO L462 AbstractCegarLoop]: Abstraction has 1435 states and 2337 transitions. [2019-11-24 01:58:48,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 2337 transitions. [2019-11-24 01:58:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-24 01:58:48,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:48,994 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-24 01:58:48,995 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1528049336, now seen corresponding path program 1 times [2019-11-24 01:58:48,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:48,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292906009] [2019-11-24 01:58:48,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 01:58:49,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292906009] [2019-11-24 01:58:49,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:49,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:49,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395178193] [2019-11-24 01:58:49,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:49,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:49,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:49,091 INFO L87 Difference]: Start difference. First operand 1435 states and 2337 transitions. Second operand 3 states. [2019-11-24 01:58:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:51,227 INFO L93 Difference]: Finished difference Result 3417 states and 5562 transitions. [2019-11-24 01:58:51,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:51,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-11-24 01:58:51,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:51,239 INFO L225 Difference]: With dead ends: 3417 [2019-11-24 01:58:51,239 INFO L226 Difference]: Without dead ends: 2013 [2019-11-24 01:58:51,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2019-11-24 01:58:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 2009. [2019-11-24 01:58:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2009 states. [2019-11-24 01:58:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3265 transitions. [2019-11-24 01:58:51,311 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3265 transitions. Word has length 56 [2019-11-24 01:58:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:51,311 INFO L462 AbstractCegarLoop]: Abstraction has 2009 states and 3265 transitions. [2019-11-24 01:58:51,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3265 transitions. [2019-11-24 01:58:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-24 01:58:51,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:51,315 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-24 01:58:51,315 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:51,315 INFO L82 PathProgramCache]: Analyzing trace with hash 424338692, now seen corresponding path program 1 times [2019-11-24 01:58:51,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:51,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630276435] [2019-11-24 01:58:51,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 01:58:51,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630276435] [2019-11-24 01:58:51,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:51,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:51,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32978112] [2019-11-24 01:58:51,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:51,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:51,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:51,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:51,413 INFO L87 Difference]: Start difference. First operand 2009 states and 3265 transitions. Second operand 3 states. [2019-11-24 01:58:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:51,653 INFO L93 Difference]: Finished difference Result 4651 states and 7598 transitions. [2019-11-24 01:58:51,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:51,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-11-24 01:58:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:51,671 INFO L225 Difference]: With dead ends: 4651 [2019-11-24 01:58:51,672 INFO L226 Difference]: Without dead ends: 2673 [2019-11-24 01:58:51,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2019-11-24 01:58:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2663. [2019-11-24 01:58:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2663 states. [2019-11-24 01:58:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 4307 transitions. [2019-11-24 01:58:51,811 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 4307 transitions. Word has length 61 [2019-11-24 01:58:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:51,813 INFO L462 AbstractCegarLoop]: Abstraction has 2663 states and 4307 transitions. [2019-11-24 01:58:51,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 4307 transitions. [2019-11-24 01:58:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-24 01:58:51,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:51,817 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-24 01:58:51,817 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2141100322, now seen corresponding path program 1 times [2019-11-24 01:58:51,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:51,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919184301] [2019-11-24 01:58:51,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 01:58:51,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919184301] [2019-11-24 01:58:51,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:51,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:51,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919011164] [2019-11-24 01:58:51,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:51,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:51,958 INFO L87 Difference]: Start difference. First operand 2663 states and 4307 transitions. Second operand 3 states. [2019-11-24 01:58:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:52,197 INFO L93 Difference]: Finished difference Result 6144 states and 9978 transitions. [2019-11-24 01:58:52,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:52,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-11-24 01:58:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:52,224 INFO L225 Difference]: With dead ends: 6144 [2019-11-24 01:58:52,225 INFO L226 Difference]: Without dead ends: 4735 [2019-11-24 01:58:52,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2019-11-24 01:58:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 2775. [2019-11-24 01:58:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2775 states. [2019-11-24 01:58:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 4419 transitions. [2019-11-24 01:58:52,526 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 4419 transitions. Word has length 61 [2019-11-24 01:58:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:52,527 INFO L462 AbstractCegarLoop]: Abstraction has 2775 states and 4419 transitions. [2019-11-24 01:58:52,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 4419 transitions. [2019-11-24 01:58:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-24 01:58:52,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:52,529 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-24 01:58:52,530 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash -356480871, now seen corresponding path program 1 times [2019-11-24 01:58:52,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:52,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348617896] [2019-11-24 01:58:52,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 01:58:52,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348617896] [2019-11-24 01:58:52,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:52,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:52,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384965721] [2019-11-24 01:58:52,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:52,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:52,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:52,718 INFO L87 Difference]: Start difference. First operand 2775 states and 4419 transitions. Second operand 4 states. [2019-11-24 01:58:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:53,129 INFO L93 Difference]: Finished difference Result 6378 states and 10144 transitions. [2019-11-24 01:58:53,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 01:58:53,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2019-11-24 01:58:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:53,147 INFO L225 Difference]: With dead ends: 6378 [2019-11-24 01:58:53,147 INFO L226 Difference]: Without dead ends: 3634 [2019-11-24 01:58:53,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2019-11-24 01:58:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 2663. [2019-11-24 01:58:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2663 states. [2019-11-24 01:58:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 4139 transitions. [2019-11-24 01:58:53,275 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 4139 transitions. Word has length 62 [2019-11-24 01:58:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:53,276 INFO L462 AbstractCegarLoop]: Abstraction has 2663 states and 4139 transitions. [2019-11-24 01:58:53,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:58:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 4139 transitions. [2019-11-24 01:58:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-24 01:58:53,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:53,279 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-24 01:58:53,279 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -910587390, now seen corresponding path program 1 times [2019-11-24 01:58:53,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:53,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733917044] [2019-11-24 01:58:53,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 01:58:53,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733917044] [2019-11-24 01:58:53,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:53,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:53,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142220283] [2019-11-24 01:58:53,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:53,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:53,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:53,469 INFO L87 Difference]: Start difference. First operand 2663 states and 4139 transitions. Second operand 4 states. [2019-11-24 01:58:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:54,337 INFO L93 Difference]: Finished difference Result 12211 states and 18939 transitions. [2019-11-24 01:58:54,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 01:58:54,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-11-24 01:58:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:54,402 INFO L225 Difference]: With dead ends: 12211 [2019-11-24 01:58:54,402 INFO L226 Difference]: Without dead ends: 9579 [2019-11-24 01:58:54,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 01:58:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9579 states. [2019-11-24 01:58:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9579 to 2719. [2019-11-24 01:58:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2719 states. [2019-11-24 01:58:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4195 transitions. [2019-11-24 01:58:54,644 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4195 transitions. Word has length 72 [2019-11-24 01:58:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:54,646 INFO L462 AbstractCegarLoop]: Abstraction has 2719 states and 4195 transitions. [2019-11-24 01:58:54,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:58:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4195 transitions. [2019-11-24 01:58:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-24 01:58:54,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:54,652 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-24 01:58:54,653 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1672966692, now seen corresponding path program 1 times [2019-11-24 01:58:54,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:54,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846339638] [2019-11-24 01:58:54,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 01:58:55,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846339638] [2019-11-24 01:58:55,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:55,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 01:58:55,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027909011] [2019-11-24 01:58:55,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 01:58:55,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:55,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 01:58:55,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 01:58:55,096 INFO L87 Difference]: Start difference. First operand 2719 states and 4195 transitions. Second operand 5 states. [2019-11-24 01:58:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:56,149 INFO L93 Difference]: Finished difference Result 6988 states and 10946 transitions. [2019-11-24 01:58:56,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 01:58:56,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2019-11-24 01:58:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:56,164 INFO L225 Difference]: With dead ends: 6988 [2019-11-24 01:58:56,165 INFO L226 Difference]: Without dead ends: 5495 [2019-11-24 01:58:56,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 01:58:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2019-11-24 01:58:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 4152. [2019-11-24 01:58:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4152 states. [2019-11-24 01:58:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 6419 transitions. [2019-11-24 01:58:56,512 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 6419 transitions. Word has length 73 [2019-11-24 01:58:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:56,512 INFO L462 AbstractCegarLoop]: Abstraction has 4152 states and 6419 transitions. [2019-11-24 01:58:56,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 01:58:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 6419 transitions. [2019-11-24 01:58:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-24 01:58:56,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:56,521 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-24 01:58:56,521 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:56,522 INFO L82 PathProgramCache]: Analyzing trace with hash -817038535, now seen corresponding path program 1 times [2019-11-24 01:58:56,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:56,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873712101] [2019-11-24 01:58:56,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 01:58:56,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873712101] [2019-11-24 01:58:56,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:56,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:56,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692991708] [2019-11-24 01:58:56,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:56,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:56,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:56,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:56,664 INFO L87 Difference]: Start difference. First operand 4152 states and 6419 transitions. Second operand 4 states. [2019-11-24 01:58:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:57,586 INFO L93 Difference]: Finished difference Result 11684 states and 18401 transitions. [2019-11-24 01:58:57,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 01:58:57,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2019-11-24 01:58:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:57,607 INFO L225 Difference]: With dead ends: 11684 [2019-11-24 01:58:57,607 INFO L226 Difference]: Without dead ends: 8758 [2019-11-24 01:58:57,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 01:58:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8758 states. [2019-11-24 01:58:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8758 to 4432. [2019-11-24 01:58:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4432 states. [2019-11-24 01:58:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6867 transitions. [2019-11-24 01:58:58,030 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6867 transitions. Word has length 74 [2019-11-24 01:58:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:58,030 INFO L462 AbstractCegarLoop]: Abstraction has 4432 states and 6867 transitions. [2019-11-24 01:58:58,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:58:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6867 transitions. [2019-11-24 01:58:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-24 01:58:58,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:58,035 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-24 01:58:58,035 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash 580073362, now seen corresponding path program 1 times [2019-11-24 01:58:58,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:58,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449829347] [2019-11-24 01:58:58,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-24 01:58:58,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449829347] [2019-11-24 01:58:58,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:58,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:58,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458212205] [2019-11-24 01:58:58,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:58,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:58,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:58,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:58,986 INFO L87 Difference]: Start difference. First operand 4432 states and 6867 transitions. Second operand 4 states. [2019-11-24 01:58:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:59,656 INFO L93 Difference]: Finished difference Result 12255 states and 19044 transitions. [2019-11-24 01:58:59,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 01:58:59,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2019-11-24 01:58:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:59,674 INFO L225 Difference]: With dead ends: 12255 [2019-11-24 01:58:59,674 INFO L226 Difference]: Without dead ends: 7854 [2019-11-24 01:58:59,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 01:58:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2019-11-24 01:58:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 4474. [2019-11-24 01:58:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4474 states. [2019-11-24 01:59:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 6909 transitions. [2019-11-24 01:59:00,004 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 6909 transitions. Word has length 76 [2019-11-24 01:59:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:59:00,004 INFO L462 AbstractCegarLoop]: Abstraction has 4474 states and 6909 transitions. [2019-11-24 01:59:00,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:59:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 6909 transitions. [2019-11-24 01:59:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-24 01:59:00,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:59:00,009 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-24 01:59:00,009 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:59:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:59:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1891208179, now seen corresponding path program 1 times [2019-11-24 01:59:00,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:59:00,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972896399] [2019-11-24 01:59:00,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:59:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:59:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-24 01:59:00,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972896399] [2019-11-24 01:59:00,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:59:00,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-24 01:59:00,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077780346] [2019-11-24 01:59:00,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 01:59:00,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:59:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 01:59:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-24 01:59:00,798 INFO L87 Difference]: Start difference. First operand 4474 states and 6909 transitions. Second operand 7 states. [2019-11-24 01:59:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:59:04,395 INFO L93 Difference]: Finished difference Result 31862 states and 49753 transitions. [2019-11-24 01:59:04,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-24 01:59:04,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2019-11-24 01:59:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:59:04,468 INFO L225 Difference]: With dead ends: 31862 [2019-11-24 01:59:04,469 INFO L226 Difference]: Without dead ends: 27419 [2019-11-24 01:59:04,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-11-24 01:59:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27419 states.