/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-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:02:51,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:02:51,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:02:51,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:02:51,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:02:51,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:02:51,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:02:51,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:02:51,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:02:51,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:02:51,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:02:51,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:02:51,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:02:51,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:02:51,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:02:51,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:02:51,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:02:51,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:02:51,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:02:51,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:02:51,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:02:51,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:02:51,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:02:51,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:02:51,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:02:51,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:02:51,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:02:51,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:02:51,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:02:51,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:02:51,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:02:51,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:02:51,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:02:51,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:02:51,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:02:51,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:02:51,304 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 04:02:51,318 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:02:51,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:02:51,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:02:51,319 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:02:51,319 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:02:51,319 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:02:51,320 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:02:51,320 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:02:51,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:02:51,320 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:02:51,320 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:02:51,321 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:02:51,322 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:02:51,322 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:02:51,323 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:02:51,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:02:51,324 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:02:51,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:02:51,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:02:51,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:02:51,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:02:51,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:02:51,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:02:51,325 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:02:51,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:02:51,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:02:51,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:02:51,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:02:51,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:02:51,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:02:51,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:02:51,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:02:51,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:02:51,327 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:02:51,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:02:51,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:02:51,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:02:51,328 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:02:51,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:02:51,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:02:51,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:02:51,627 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:02:51,628 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:02:51,629 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-11-24 04:02:51,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd2e204e3/95c132c821ce4a0fa2a07686e541a603/FLAG87fd862aa [2019-11-24 04:02:52,383 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:02:52,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-11-24 04:02:52,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd2e204e3/95c132c821ce4a0fa2a07686e541a603/FLAG87fd862aa [2019-11-24 04:02:52,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd2e204e3/95c132c821ce4a0fa2a07686e541a603 [2019-11-24 04:02:52,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:02:52,539 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:02:52,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:02:52,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:02:52,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:02:52,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:02:52" (1/1) ... [2019-11-24 04:02:52,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e338414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:52, skipping insertion in model container [2019-11-24 04:02:52,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:02:52" (1/1) ... [2019-11-24 04:02:52,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:02:52,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:02:53,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:02:53,863 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:02:54,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:02:54,208 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:02:54,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54 WrapperNode [2019-11-24 04:02:54,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:02:54,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:02:54,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:02:54,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:02:54,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:02:54,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:02:54,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:02:54,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:02:54,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (1/1) ... [2019-11-24 04:02:54,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:02:54,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:02:54,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:02:54,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:02:54,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (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 04:02:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:02:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:02:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:02:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:02:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:02:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:02:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:02:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:02:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:02:54,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:03:00,682 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:03:00,682 INFO L284 CfgBuilder]: Removed 253 assume(true) statements. [2019-11-24 04:03:00,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:03:00 BoogieIcfgContainer [2019-11-24 04:03:00,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:03:00,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:03:00,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:03:00,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:03:00,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:02:52" (1/3) ... [2019-11-24 04:03:00,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da50d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:03:00, skipping insertion in model container [2019-11-24 04:03:00,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:54" (2/3) ... [2019-11-24 04:03:00,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da50d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:03:00, skipping insertion in model container [2019-11-24 04:03:00,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:03:00" (3/3) ... [2019-11-24 04:03:00,693 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-11-24 04:03:00,703 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:03:00,711 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:03:00,724 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:03:00,753 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:03:00,753 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:03:00,753 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:03:00,753 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:03:00,753 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:03:00,754 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:03:00,754 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:03:00,754 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:03:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2019-11-24 04:03:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:03:00,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:00,782 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:00,782 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1477081465, now seen corresponding path program 1 times [2019-11-24 04:03:00,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:00,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600002765] [2019-11-24 04:03:00,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:01,478 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 04:03:01,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600002765] [2019-11-24 04:03:01,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:03:01,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:03:01,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154214034] [2019-11-24 04:03:01,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:03:01,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:03:01,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:03:01,502 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 3 states. [2019-11-24 04:03:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:01,733 INFO L93 Difference]: Finished difference Result 210 states and 371 transitions. [2019-11-24 04:03:01,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:03:01,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 04:03:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:01,749 INFO L225 Difference]: With dead ends: 210 [2019-11-24 04:03:01,750 INFO L226 Difference]: Without dead ends: 120 [2019-11-24 04:03:01,753 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 04:03:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-24 04:03:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2019-11-24 04:03:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-24 04:03:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 207 transitions. [2019-11-24 04:03:01,806 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 207 transitions. Word has length 15 [2019-11-24 04:03:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:01,807 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 207 transitions. [2019-11-24 04:03:01,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:03:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 207 transitions. [2019-11-24 04:03:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:03:01,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:01,809 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 04:03:01,809 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash 19821661, now seen corresponding path program 1 times [2019-11-24 04:03:01,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:01,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426054398] [2019-11-24 04:03:01,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:01,983 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 04:03:01,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426054398] [2019-11-24 04:03:01,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:03:01,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:03:01,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157855542] [2019-11-24 04:03:01,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:03:01,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:01,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:03:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:03:01,987 INFO L87 Difference]: Start difference. First operand 120 states and 207 transitions. Second operand 3 states. [2019-11-24 04:03:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:02,034 INFO L93 Difference]: Finished difference Result 195 states and 339 transitions. [2019-11-24 04:03:02,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:03:02,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 04:03:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:02,037 INFO L225 Difference]: With dead ends: 195 [2019-11-24 04:03:02,037 INFO L226 Difference]: Without dead ends: 192 [2019-11-24 04:03:02,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 04:03:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-24 04:03:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2019-11-24 04:03:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-24 04:03:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 335 transitions. [2019-11-24 04:03:02,063 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 335 transitions. Word has length 19 [2019-11-24 04:03:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:02,063 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 335 transitions. [2019-11-24 04:03:02,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:03:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 335 transitions. [2019-11-24 04:03:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-24 04:03:02,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:02,066 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:02,066 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1423494865, now seen corresponding path program 1 times [2019-11-24 04:03:02,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:02,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325003152] [2019-11-24 04:03:02,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:03:02,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325003152] [2019-11-24 04:03:02,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:03:02,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:03:02,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229328956] [2019-11-24 04:03:02,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:03:02,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:02,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:03:02,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:03:02,222 INFO L87 Difference]: Start difference. First operand 192 states and 335 transitions. Second operand 3 states. [2019-11-24 04:03:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:02,369 INFO L93 Difference]: Finished difference Result 466 states and 805 transitions. [2019-11-24 04:03:02,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:03:02,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-24 04:03:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:02,372 INFO L225 Difference]: With dead ends: 466 [2019-11-24 04:03:02,372 INFO L226 Difference]: Without dead ends: 281 [2019-11-24 04:03:02,374 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 04:03:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-11-24 04:03:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2019-11-24 04:03:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-24 04:03:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 477 transitions. [2019-11-24 04:03:02,420 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 477 transitions. Word has length 27 [2019-11-24 04:03:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:02,420 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 477 transitions. [2019-11-24 04:03:02,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:03:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 477 transitions. [2019-11-24 04:03:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-24 04:03:02,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:02,423 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:02,423 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1860694220, now seen corresponding path program 1 times [2019-11-24 04:03:02,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:02,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155879358] [2019-11-24 04:03:02,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 04:03:02,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155879358] [2019-11-24 04:03:02,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:03:02,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:03:02,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774556826] [2019-11-24 04:03:02,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:03:02,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:02,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:03:02,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:03:02,794 INFO L87 Difference]: Start difference. First operand 278 states and 477 transitions. Second operand 3 states. [2019-11-24 04:03:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:03,073 INFO L93 Difference]: Finished difference Result 567 states and 977 transitions. [2019-11-24 04:03:03,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:03:03,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-24 04:03:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:03,076 INFO L225 Difference]: With dead ends: 567 [2019-11-24 04:03:03,076 INFO L226 Difference]: Without dead ends: 291 [2019-11-24 04:03:03,081 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 04:03:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-11-24 04:03:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2019-11-24 04:03:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2019-11-24 04:03:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 490 transitions. [2019-11-24 04:03:03,114 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 490 transitions. Word has length 37 [2019-11-24 04:03:03,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:03,114 INFO L462 AbstractCegarLoop]: Abstraction has 291 states and 490 transitions. [2019-11-24 04:03:03,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:03:03,115 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 490 transitions. [2019-11-24 04:03:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-24 04:03:03,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:03,122 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:03,123 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1358537483, now seen corresponding path program 1 times [2019-11-24 04:03:03,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:03,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638916688] [2019-11-24 04:03:03,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 04:03:03,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638916688] [2019-11-24 04:03:03,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:03:03,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:03:03,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042513474] [2019-11-24 04:03:03,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:03:03,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:03:03,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:03:03,618 INFO L87 Difference]: Start difference. First operand 291 states and 490 transitions. Second operand 3 states. [2019-11-24 04:03:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:03,651 INFO L93 Difference]: Finished difference Result 577 states and 974 transitions. [2019-11-24 04:03:03,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:03:03,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-11-24 04:03:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:03,654 INFO L225 Difference]: With dead ends: 577 [2019-11-24 04:03:03,654 INFO L226 Difference]: Without dead ends: 294 [2019-11-24 04:03:03,655 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 04:03:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-24 04:03:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-24 04:03:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-24 04:03:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 493 transitions. [2019-11-24 04:03:03,669 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 493 transitions. Word has length 43 [2019-11-24 04:03:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:03,670 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 493 transitions. [2019-11-24 04:03:03,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:03:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 493 transitions. [2019-11-24 04:03:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-24 04:03:03,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:03,672 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:03,673 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1441978745, now seen corresponding path program 1 times [2019-11-24 04:03:03,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:03,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127800877] [2019-11-24 04:03:03,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-24 04:03:04,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127800877] [2019-11-24 04:03:04,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106855047] [2019-11-24 04:03:04,103 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 04:03:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:04,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-24 04:03:04,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:03:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 04:03:05,025 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:03:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 04:03:05,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 04:03:05,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 6 [2019-11-24 04:03:05,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860746395] [2019-11-24 04:03:05,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:03:05,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:05,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:03:05,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:03:05,038 INFO L87 Difference]: Start difference. First operand 294 states and 493 transitions. Second operand 4 states. [2019-11-24 04:03:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:05,228 INFO L93 Difference]: Finished difference Result 628 states and 1039 transitions. [2019-11-24 04:03:05,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:03:05,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-11-24 04:03:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:05,231 INFO L225 Difference]: With dead ends: 628 [2019-11-24 04:03:05,231 INFO L226 Difference]: Without dead ends: 341 [2019-11-24 04:03:05,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:03:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2019-11-24 04:03:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 296. [2019-11-24 04:03:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-11-24 04:03:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 493 transitions. [2019-11-24 04:03:05,247 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 493 transitions. Word has length 46 [2019-11-24 04:03:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:05,248 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 493 transitions. [2019-11-24 04:03:05,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:03:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 493 transitions. [2019-11-24 04:03:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-24 04:03:05,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:05,249 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:05,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:03:05,467 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:05,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1737197002, now seen corresponding path program 1 times [2019-11-24 04:03:05,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:05,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615058895] [2019-11-24 04:03:05,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-24 04:03:05,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615058895] [2019-11-24 04:03:05,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612858671] [2019-11-24 04:03:05,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:03:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:07,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-24 04:03:07,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:03:07,880 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2019-11-24 04:03:07,881 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:07,944 INFO L567 ElimStorePlain]: treesize reduction 29, result has 50.8 percent of original size [2019-11-24 04:03:07,945 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-11-24 04:03:07,945 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:26 [2019-11-24 04:03:07,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:03:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-24 04:03:07,982 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:03:08,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:03:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-24 04:03:08,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 04:03:08,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 7 [2019-11-24 04:03:08,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374525138] [2019-11-24 04:03:08,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:03:08,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:08,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:03:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:03:08,045 INFO L87 Difference]: Start difference. First operand 296 states and 493 transitions. Second operand 5 states. [2019-11-24 04:03:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:08,359 INFO L93 Difference]: Finished difference Result 715 states and 1194 transitions. [2019-11-24 04:03:08,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:03:08,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-11-24 04:03:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:08,365 INFO L225 Difference]: With dead ends: 715 [2019-11-24 04:03:08,365 INFO L226 Difference]: Without dead ends: 710 [2019-11-24 04:03:08,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:03:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2019-11-24 04:03:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 300. [2019-11-24 04:03:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2019-11-24 04:03:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 499 transitions. [2019-11-24 04:03:08,394 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 499 transitions. Word has length 48 [2019-11-24 04:03:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:08,395 INFO L462 AbstractCegarLoop]: Abstraction has 300 states and 499 transitions. [2019-11-24 04:03:08,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:03:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 499 transitions. [2019-11-24 04:03:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-24 04:03:08,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:08,396 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:08,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:03:08,612 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:08,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1587864256, now seen corresponding path program 1 times [2019-11-24 04:03:08,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:08,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973374356] [2019-11-24 04:03:08,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-24 04:03:09,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973374356] [2019-11-24 04:03:09,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295984516] [2019-11-24 04:03:09,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:03:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:10,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-24 04:03:10,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:03:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-24 04:03:10,778 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:03:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-24 04:03:10,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1864648013] [2019-11-24 04:03:10,853 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2019-11-24 04:03:10,854 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:03:10,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:03:10,876 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:03:10,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:03:11,955 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:14,743 WARN L192 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 3901