/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--usb--cx82310_eth.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 01:58:35,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 01:58:35,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 01:58:35,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 01:58:35,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 01:58:35,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 01:58:35,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 01:58:35,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 01:58:35,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 01:58:35,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 01:58:35,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 01:58:35,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 01:58:35,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 01:58:35,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 01:58:35,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 01:58:35,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 01:58:35,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 01:58:35,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 01:58:35,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 01:58:35,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 01:58:35,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 01:58:35,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 01:58:35,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 01:58:35,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 01:58:35,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 01:58:35,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 01:58:35,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 01:58:35,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 01:58:35,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 01:58:35,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 01:58:35,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 01:58:35,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 01:58:35,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 01:58:35,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 01:58:35,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 01:58:35,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 01:58:35,159 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 01:58:35,174 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 01:58:35,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 01:58:35,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 01:58:35,175 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 01:58:35,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 01:58:35,176 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 01:58:35,176 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 01:58:35,176 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 01:58:35,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 01:58:35,176 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 01:58:35,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 01:58:35,177 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 01:58:35,177 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 01:58:35,177 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 01:58:35,177 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 01:58:35,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 01:58:35,178 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 01:58:35,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 01:58:35,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 01:58:35,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 01:58:35,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 01:58:35,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 01:58:35,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 01:58:35,180 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 01:58:35,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 01:58:35,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 01:58:35,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 01:58:35,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 01:58:35,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 01:58:35,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 01:58:35,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 01:58:35,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 01:58:35,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 01:58:35,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 01:58:35,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 01:58:35,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 01:58:35,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 01:58:35,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 01:58:35,460 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 01:58:35,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 01:58:35,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 01:58:35,478 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 01:58:35,479 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 01:58:35,480 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i [2019-11-24 01:58:35,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0b5270f/fdd2bb2c903f45ebaaa794831573bb4c/FLAG765abbf77 [2019-11-24 01:58:36,309 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 01:58:36,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i [2019-11-24 01:58:36,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0b5270f/fdd2bb2c903f45ebaaa794831573bb4c/FLAG765abbf77 [2019-11-24 01:58:36,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0b5270f/fdd2bb2c903f45ebaaa794831573bb4c [2019-11-24 01:58:36,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 01:58:36,407 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 01:58:36,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 01:58:36,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 01:58:36,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 01:58:36,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:58:36" (1/1) ... [2019-11-24 01:58:36,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a52829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:36, skipping insertion in model container [2019-11-24 01:58:36,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:58:36" (1/1) ... [2019-11-24 01:58:36,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 01:58:36,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 01:58:37,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 01:58:37,918 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 01:58:38,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 01:58:38,239 INFO L208 MainTranslator]: Completed translation [2019-11-24 01:58:38,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38 WrapperNode [2019-11-24 01:58:38,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 01:58:38,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 01:58:38,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 01:58:38,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 01:58:38,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 01:58:38,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 01:58:38,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 01:58:38,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 01:58:38,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... [2019-11-24 01:58:38,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 01:58:38,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 01:58:38,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 01:58:38,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 01:58:38,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 01:58:38,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-24 01:58:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-11-24 01:58:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-11-24 01:58:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 01:58:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 01:58:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 01:58:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 01:58:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 01:58:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 01:58:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 01:58:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 01:58:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 01:58:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-11-24 01:58:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 01:58:38,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 01:58:43,415 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 01:58:43,416 INFO L284 CfgBuilder]: Removed 311 assume(true) statements. [2019-11-24 01:58:43,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:58:43 BoogieIcfgContainer [2019-11-24 01:58:43,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 01:58:43,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 01:58:43,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 01:58:43,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 01:58:43,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:58:36" (1/3) ... [2019-11-24 01:58:43,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3bbd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:58:43, skipping insertion in model container [2019-11-24 01:58:43,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:38" (2/3) ... [2019-11-24 01:58:43,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3bbd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:58:43, skipping insertion in model container [2019-11-24 01:58:43,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:58:43" (3/3) ... [2019-11-24 01:58:43,430 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i [2019-11-24 01:58:43,441 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 01:58:43,452 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 01:58:43,466 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 01:58:43,500 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 01:58:43,500 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 01:58:43,500 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 01:58:43,500 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 01:58:43,500 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 01:58:43,500 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 01:58:43,501 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 01:58:43,501 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 01:58:43,527 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states. [2019-11-24 01:58:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 01:58:43,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:43,538 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 01:58:43,538 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:43,545 INFO L82 PathProgramCache]: Analyzing trace with hash -284650084, now seen corresponding path program 1 times [2019-11-24 01:58:43,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:43,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658320510] [2019-11-24 01:58:43,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:44,080 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 01:58:44,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658320510] [2019-11-24 01:58:44,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:44,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:44,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256038093] [2019-11-24 01:58:44,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:44,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:44,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:44,107 INFO L87 Difference]: Start difference. First operand 212 states. Second operand 3 states. [2019-11-24 01:58:44,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:44,324 INFO L93 Difference]: Finished difference Result 605 states and 1050 transitions. [2019-11-24 01:58:44,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:44,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-24 01:58:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:44,345 INFO L225 Difference]: With dead ends: 605 [2019-11-24 01:58:44,345 INFO L226 Difference]: Without dead ends: 389 [2019-11-24 01:58:44,350 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 01:58:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-11-24 01:58:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2019-11-24 01:58:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-11-24 01:58:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 664 transitions. [2019-11-24 01:58:44,434 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 664 transitions. Word has length 14 [2019-11-24 01:58:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:44,435 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 664 transitions. [2019-11-24 01:58:44,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 664 transitions. [2019-11-24 01:58:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 01:58:44,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:44,437 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 01:58:44,438 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2090575664, now seen corresponding path program 1 times [2019-11-24 01:58:44,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:44,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734784515] [2019-11-24 01:58:44,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:44,629 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 01:58:44,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734784515] [2019-11-24 01:58:44,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:44,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:44,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570492736] [2019-11-24 01:58:44,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:44,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:44,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:44,633 INFO L87 Difference]: Start difference. First operand 389 states and 664 transitions. Second operand 4 states. [2019-11-24 01:58:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:44,764 INFO L93 Difference]: Finished difference Result 772 states and 1318 transitions. [2019-11-24 01:58:44,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 01:58:44,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-24 01:58:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:44,770 INFO L225 Difference]: With dead ends: 772 [2019-11-24 01:58:44,770 INFO L226 Difference]: Without dead ends: 768 [2019-11-24 01:58:44,772 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 01:58:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-11-24 01:58:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 760. [2019-11-24 01:58:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2019-11-24 01:58:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1304 transitions. [2019-11-24 01:58:44,847 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1304 transitions. Word has length 19 [2019-11-24 01:58:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:44,848 INFO L462 AbstractCegarLoop]: Abstraction has 760 states and 1304 transitions. [2019-11-24 01:58:44,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:58:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1304 transitions. [2019-11-24 01:58:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-24 01:58:44,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:44,857 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] [2019-11-24 01:58:44,860 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:44,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:44,860 INFO L82 PathProgramCache]: Analyzing trace with hash -746829722, now seen corresponding path program 1 times [2019-11-24 01:58:44,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:44,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020873672] [2019-11-24 01:58:44,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:44,975 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 01:58:44,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020873672] [2019-11-24 01:58:44,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:44,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:44,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119886160] [2019-11-24 01:58:44,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:44,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:44,980 INFO L87 Difference]: Start difference. First operand 760 states and 1304 transitions. Second operand 3 states. [2019-11-24 01:58:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:45,152 INFO L93 Difference]: Finished difference Result 1604 states and 2747 transitions. [2019-11-24 01:58:45,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:45,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-11-24 01:58:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:45,157 INFO L225 Difference]: With dead ends: 1604 [2019-11-24 01:58:45,158 INFO L226 Difference]: Without dead ends: 850 [2019-11-24 01:58:45,161 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 01:58:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2019-11-24 01:58:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 846. [2019-11-24 01:58:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 846 states. [2019-11-24 01:58:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1446 transitions. [2019-11-24 01:58:45,214 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1446 transitions. Word has length 38 [2019-11-24 01:58:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:45,214 INFO L462 AbstractCegarLoop]: Abstraction has 846 states and 1446 transitions. [2019-11-24 01:58:45,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1446 transitions. [2019-11-24 01:58:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-24 01:58:45,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:45,228 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] [2019-11-24 01:58:45,228 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash -415806674, now seen corresponding path program 1 times [2019-11-24 01:58:45,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:45,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708950719] [2019-11-24 01:58:45,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 01:58:45,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708950719] [2019-11-24 01:58:45,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:45,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:45,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426287871] [2019-11-24 01:58:45,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:45,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:45,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:45,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:45,368 INFO L87 Difference]: Start difference. First operand 846 states and 1446 transitions. Second operand 3 states. [2019-11-24 01:58:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:45,508 INFO L93 Difference]: Finished difference Result 1816 states and 3107 transitions. [2019-11-24 01:58:45,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:45,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2019-11-24 01:58:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:45,515 INFO L225 Difference]: With dead ends: 1816 [2019-11-24 01:58:45,516 INFO L226 Difference]: Without dead ends: 976 [2019-11-24 01:58:45,518 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 01:58:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2019-11-24 01:58:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 972. [2019-11-24 01:58:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2019-11-24 01:58:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1644 transitions. [2019-11-24 01:58:45,557 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1644 transitions. Word has length 50 [2019-11-24 01:58:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:45,558 INFO L462 AbstractCegarLoop]: Abstraction has 972 states and 1644 transitions. [2019-11-24 01:58:45,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1644 transitions. [2019-11-24 01:58:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-24 01:58:45,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:45,560 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] [2019-11-24 01:58:45,560 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash 294456284, now seen corresponding path program 1 times [2019-11-24 01:58:45,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:45,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570516603] [2019-11-24 01:58:45,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:45,673 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 01:58:45,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570516603] [2019-11-24 01:58:45,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:45,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:45,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445916405] [2019-11-24 01:58:45,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:45,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:45,676 INFO L87 Difference]: Start difference. First operand 972 states and 1644 transitions. Second operand 4 states. [2019-11-24 01:58:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:46,032 INFO L93 Difference]: Finished difference Result 4327 states and 7329 transitions. [2019-11-24 01:58:46,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 01:58:46,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-24 01:58:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:46,053 INFO L225 Difference]: With dead ends: 4327 [2019-11-24 01:58:46,053 INFO L226 Difference]: Without dead ends: 3361 [2019-11-24 01:58:46,056 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 01:58:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2019-11-24 01:58:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 1004. [2019-11-24 01:58:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2019-11-24 01:58:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1676 transitions. [2019-11-24 01:58:46,146 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1676 transitions. Word has length 50 [2019-11-24 01:58:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:46,148 INFO L462 AbstractCegarLoop]: Abstraction has 1004 states and 1676 transitions. [2019-11-24 01:58:46,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:58:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1676 transitions. [2019-11-24 01:58:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-24 01:58:46,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:46,150 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] [2019-11-24 01:58:46,150 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash 551086190, now seen corresponding path program 1 times [2019-11-24 01:58:46,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:46,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569291141] [2019-11-24 01:58:46,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 01:58:46,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569291141] [2019-11-24 01:58:46,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:46,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:46,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179878708] [2019-11-24 01:58:46,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:46,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:46,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:46,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:46,391 INFO L87 Difference]: Start difference. First operand 1004 states and 1676 transitions. Second operand 3 states. [2019-11-24 01:58:46,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:46,469 INFO L93 Difference]: Finished difference Result 2005 states and 3348 transitions. [2019-11-24 01:58:46,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:46,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2019-11-24 01:58:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:46,475 INFO L225 Difference]: With dead ends: 2005 [2019-11-24 01:58:46,476 INFO L226 Difference]: Without dead ends: 1006 [2019-11-24 01:58:46,478 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 01:58:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2019-11-24 01:58:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1006. [2019-11-24 01:58:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2019-11-24 01:58:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1678 transitions. [2019-11-24 01:58:46,536 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1678 transitions. Word has length 51 [2019-11-24 01:58:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:46,536 INFO L462 AbstractCegarLoop]: Abstraction has 1006 states and 1678 transitions. [2019-11-24 01:58:46,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1678 transitions. [2019-11-24 01:58:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-24 01:58:46,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:46,539 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] [2019-11-24 01:58:46,539 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:46,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1384989434, now seen corresponding path program 1 times [2019-11-24 01:58:46,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:46,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309919590] [2019-11-24 01:58:46,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 01:58:46,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309919590] [2019-11-24 01:58:46,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352951854] [2019-11-24 01:58:46,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 01:58:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:47,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 01:58:47,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 01:58:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 01:58:47,160 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 01:58:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 01:58:47,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574556914] [2019-11-24 01:58:47,246 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2019-11-24 01:58:47,246 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 01:58:47,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 01:58:47,262 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 01:58:47,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 01:58:51,353 WARN L192 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 834 [2019-11-24 01:58:52,925 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 819 [2019-11-24 01:58:54,347 WARN L192 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 867 [2019-11-24 01:58:56,099 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 865 [2019-11-24 01:58:57,619 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 863 [2019-11-24 01:58:58,233 WARN L192 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 866 [2019-11-24 01:58:59,008 WARN L192 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 1035 DAG size of output: 1035 [2019-11-24 01:59:06,427 WARN L192 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 1049 [2019-11-24 01:59:15,758 WARN L192 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 1047 [2019-11-24 01:59:24,877 WARN L192 SmtUtils]: Spent 946.00 ms on a formula simplification that was a NOOP. DAG size: 1045 [2019-11-24 01:59:26,208 WARN L192 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 1052 [2019-11-24 01:59:27,796 WARN L192 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1053 DAG size of output: 1053 [2019-11-24 01:59:51,024 WARN L192 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 1065