/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--gl620a.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 01:58:45,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 01:58:45,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 01:58:45,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 01:58:45,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 01:58:45,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 01:58:45,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 01:58:45,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 01:58:45,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 01:58:45,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 01:58:45,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 01:58:45,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 01:58:45,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 01:58:45,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 01:58:45,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 01:58:45,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 01:58:45,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 01:58:45,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 01:58:45,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 01:58:45,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 01:58:45,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 01:58:45,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 01:58:45,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 01:58:45,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 01:58:45,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 01:58:45,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 01:58:45,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 01:58:45,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 01:58:45,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 01:58:45,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 01:58:45,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 01:58:45,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 01:58:45,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 01:58:45,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 01:58:45,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 01:58:45,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 01:58:45,201 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 01:58:45,239 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 01:58:45,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 01:58:45,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 01:58:45,240 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 01:58:45,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 01:58:45,241 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 01:58:45,241 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 01:58:45,241 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 01:58:45,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 01:58:45,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 01:58:45,241 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 01:58:45,242 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 01:58:45,242 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 01:58:45,242 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 01:58:45,242 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 01:58:45,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 01:58:45,244 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 01:58:45,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 01:58:45,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 01:58:45,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 01:58:45,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 01:58:45,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 01:58:45,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 01:58:45,245 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 01:58:45,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 01:58:45,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 01:58:45,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 01:58:45,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 01:58:45,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 01:58:45,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 01:58:45,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 01:58:45,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 01:58:45,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 01:58:45,248 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 01:58:45,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 01:58:45,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 01:58:45,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 01:58:45,248 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 01:58:45,516 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 01:58:45,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 01:58:45,541 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 01:58:45,542 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 01:58:45,542 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 01:58:45,543 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2019-11-24 01:58:45,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96975ee8/92625b8b5cde498b8192a969bbbb938b/FLAG8fa9735d1 [2019-11-24 01:58:46,340 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 01:58:46,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2019-11-24 01:58:46,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96975ee8/92625b8b5cde498b8192a969bbbb938b/FLAG8fa9735d1 [2019-11-24 01:58:46,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96975ee8/92625b8b5cde498b8192a969bbbb938b [2019-11-24 01:58:46,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 01:58:46,465 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 01:58:46,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 01:58:46,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 01:58:46,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 01:58:46,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:58:46" (1/1) ... [2019-11-24 01:58:46,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144be88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:46, skipping insertion in model container [2019-11-24 01:58:46,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:58:46" (1/1) ... [2019-11-24 01:58:46,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 01:58:46,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 01:58:47,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 01:58:47,928 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 01:58:48,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 01:58:48,276 INFO L208 MainTranslator]: Completed translation [2019-11-24 01:58:48,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48 WrapperNode [2019-11-24 01:58:48,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 01:58:48,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 01:58:48,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 01:58:48,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 01:58:48,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 01:58:48,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 01:58:48,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 01:58:48,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 01:58:48,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (1/1) ... [2019-11-24 01:58:48,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 01:58:48,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 01:58:48,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 01:58:48,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 01:58:48,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (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 01:58:48,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-24 01:58:48,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-11-24 01:58:48,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-11-24 01:58:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 01:58:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 01:58:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 01:58:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 01:58:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 01:58:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 01:58:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 01:58:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 01:58:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 01:58:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-11-24 01:58:48,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 01:58:48,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 01:58:53,634 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 01:58:53,634 INFO L284 CfgBuilder]: Removed 224 assume(true) statements. [2019-11-24 01:58:53,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:58:53 BoogieIcfgContainer [2019-11-24 01:58:53,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 01:58:53,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 01:58:53,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 01:58:53,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 01:58:53,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:58:46" (1/3) ... [2019-11-24 01:58:53,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579646af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:58:53, skipping insertion in model container [2019-11-24 01:58:53,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:58:48" (2/3) ... [2019-11-24 01:58:53,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579646af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:58:53, skipping insertion in model container [2019-11-24 01:58:53,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:58:53" (3/3) ... [2019-11-24 01:58:53,643 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2019-11-24 01:58:53,651 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 01:58:53,659 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 01:58:53,667 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 01:58:53,693 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 01:58:53,694 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 01:58:53,694 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 01:58:53,694 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 01:58:53,694 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 01:58:53,694 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 01:58:53,694 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 01:58:53,695 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 01:58:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2019-11-24 01:58:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 01:58:53,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:53,721 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 01:58:53,722 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:53,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2071489178, now seen corresponding path program 1 times [2019-11-24 01:58:53,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:53,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543332638] [2019-11-24 01:58:53,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:54,216 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 01:58:54,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543332638] [2019-11-24 01:58:54,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:54,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:54,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912817287] [2019-11-24 01:58:54,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:54,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:54,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:54,245 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 3 states. [2019-11-24 01:58:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:54,488 INFO L93 Difference]: Finished difference Result 296 states and 508 transitions. [2019-11-24 01:58:54,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:54,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 01:58:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:54,516 INFO L225 Difference]: With dead ends: 296 [2019-11-24 01:58:54,517 INFO L226 Difference]: Without dead ends: 185 [2019-11-24 01:58:54,525 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 01:58:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-11-24 01:58:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2019-11-24 01:58:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-24 01:58:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 310 transitions. [2019-11-24 01:58:54,612 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 310 transitions. Word has length 16 [2019-11-24 01:58:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:54,612 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 310 transitions. [2019-11-24 01:58:54,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 310 transitions. [2019-11-24 01:58:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 01:58:54,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:54,614 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] [2019-11-24 01:58:54,614 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash -856452110, now seen corresponding path program 1 times [2019-11-24 01:58:54,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:54,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814258936] [2019-11-24 01:58:54,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:54,751 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 01:58:54,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814258936] [2019-11-24 01:58:54,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:54,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:54,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035796245] [2019-11-24 01:58:54,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:54,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:54,757 INFO L87 Difference]: Start difference. First operand 185 states and 310 transitions. Second operand 4 states. [2019-11-24 01:58:54,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:54,850 INFO L93 Difference]: Finished difference Result 361 states and 605 transitions. [2019-11-24 01:58:54,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 01:58:54,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-24 01:58:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:54,853 INFO L225 Difference]: With dead ends: 361 [2019-11-24 01:58:54,853 INFO L226 Difference]: Without dead ends: 357 [2019-11-24 01:58:54,854 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 01:58:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2019-11-24 01:58:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 353. [2019-11-24 01:58:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-11-24 01:58:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 595 transitions. [2019-11-24 01:58:54,884 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 595 transitions. Word has length 21 [2019-11-24 01:58:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:54,885 INFO L462 AbstractCegarLoop]: Abstraction has 353 states and 595 transitions. [2019-11-24 01:58:54,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:58:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 595 transitions. [2019-11-24 01:58:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-24 01:58:54,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:54,889 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] [2019-11-24 01:58:54,889 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:54,890 INFO L82 PathProgramCache]: Analyzing trace with hash -412126905, now seen corresponding path program 1 times [2019-11-24 01:58:54,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:54,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051986692] [2019-11-24 01:58:54,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 01:58:54,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051986692] [2019-11-24 01:58:54,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:54,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:54,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772396601] [2019-11-24 01:58:54,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:54,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:54,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:54,983 INFO L87 Difference]: Start difference. First operand 353 states and 595 transitions. Second operand 3 states. [2019-11-24 01:58:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:55,098 INFO L93 Difference]: Finished difference Result 787 states and 1324 transitions. [2019-11-24 01:58:55,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:55,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-11-24 01:58:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:55,104 INFO L225 Difference]: With dead ends: 787 [2019-11-24 01:58:55,104 INFO L226 Difference]: Without dead ends: 443 [2019-11-24 01:58:55,109 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 01:58:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2019-11-24 01:58:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 439. [2019-11-24 01:58:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2019-11-24 01:58:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 737 transitions. [2019-11-24 01:58:55,166 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 737 transitions. Word has length 45 [2019-11-24 01:58:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:55,166 INFO L462 AbstractCegarLoop]: Abstraction has 439 states and 737 transitions. [2019-11-24 01:58:55,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 737 transitions. [2019-11-24 01:58:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-24 01:58:55,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:55,177 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] [2019-11-24 01:58:55,178 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:55,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1565244406, now seen corresponding path program 1 times [2019-11-24 01:58:55,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:55,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597092231] [2019-11-24 01:58:55,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 01:58:55,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597092231] [2019-11-24 01:58:55,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:55,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:58:55,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742896677] [2019-11-24 01:58:55,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:58:55,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:58:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:58:55,327 INFO L87 Difference]: Start difference. First operand 439 states and 737 transitions. Second operand 4 states. [2019-11-24 01:58:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:55,543 INFO L93 Difference]: Finished difference Result 1903 states and 3203 transitions. [2019-11-24 01:58:55,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 01:58:55,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-24 01:58:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:55,553 INFO L225 Difference]: With dead ends: 1903 [2019-11-24 01:58:55,553 INFO L226 Difference]: Without dead ends: 1473 [2019-11-24 01:58:55,554 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 01:58:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2019-11-24 01:58:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 455. [2019-11-24 01:58:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2019-11-24 01:58:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 753 transitions. [2019-11-24 01:58:55,593 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 753 transitions. Word has length 55 [2019-11-24 01:58:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:55,594 INFO L462 AbstractCegarLoop]: Abstraction has 455 states and 753 transitions. [2019-11-24 01:58:55,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:58:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 753 transitions. [2019-11-24 01:58:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-24 01:58:55,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:55,595 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] [2019-11-24 01:58:55,596 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash -95411936, now seen corresponding path program 1 times [2019-11-24 01:58:55,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:55,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931224116] [2019-11-24 01:58:55,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 01:58:55,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931224116] [2019-11-24 01:58:55,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:58:55,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:58:55,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089361766] [2019-11-24 01:58:55,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:58:55,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:58:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:58:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:58:55,766 INFO L87 Difference]: Start difference. First operand 455 states and 753 transitions. Second operand 3 states. [2019-11-24 01:58:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:58:55,859 INFO L93 Difference]: Finished difference Result 904 states and 1497 transitions. [2019-11-24 01:58:55,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:58:55,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-11-24 01:58:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:58:55,862 INFO L225 Difference]: With dead ends: 904 [2019-11-24 01:58:55,862 INFO L226 Difference]: Without dead ends: 457 [2019-11-24 01:58:55,863 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 01:58:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2019-11-24 01:58:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2019-11-24 01:58:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2019-11-24 01:58:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 755 transitions. [2019-11-24 01:58:55,890 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 755 transitions. Word has length 56 [2019-11-24 01:58:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:58:55,890 INFO L462 AbstractCegarLoop]: Abstraction has 457 states and 755 transitions. [2019-11-24 01:58:55,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:58:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 755 transitions. [2019-11-24 01:58:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-24 01:58:55,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:58:55,892 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] [2019-11-24 01:58:55,892 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:58:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:58:55,892 INFO L82 PathProgramCache]: Analyzing trace with hash -458154342, now seen corresponding path program 1 times [2019-11-24 01:58:55,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:58:55,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431330660] [2019-11-24 01:58:55,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:58:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-24 01:58:56,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431330660] [2019-11-24 01:58:56,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107896169] [2019-11-24 01:58:56,137 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 01:58:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:58:56,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 01:58:56,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 01:58:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-24 01:58:56,618 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 01:58:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-24 01:58:56,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693527229] [2019-11-24 01:58:56,682 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2019-11-24 01:58:56,682 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 01:58:56,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 01:58:56,696 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 01:58:56,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 01:59:03,891 WARN L192 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 976 [2019-11-24 01:59:06,280 WARN L192 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 163 [2019-11-24 01:59:06,842 WARN L192 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 999 [2019-11-24 01:59:09,539 WARN L192 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 1059 [2019-11-24 01:59:12,181 WARN L192 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 1057 [2019-11-24 01:59:13,359 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 1055 [2019-11-24 01:59:14,205 WARN L192 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 1058 [2019-11-24 01:59:15,689 WARN L192 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 1243 DAG size of output: 1243 [2019-11-24 01:59:33,384 WARN L192 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 1257 [2019-11-24 01:59:48,964 WARN L192 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 1255 [2019-11-24 02:00:03,496 WARN L192 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 1253 [2019-11-24 02:00:05,588 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 1260 [2019-11-24 02:00:08,221 WARN L192 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 1261 DAG size of output: 1261