/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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 01:53:11,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 01:53:11,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 01:53:11,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 01:53:11,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 01:53:11,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 01:53:11,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 01:53:11,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 01:53:11,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 01:53:11,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 01:53:11,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 01:53:11,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 01:53:11,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 01:53:11,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 01:53:11,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 01:53:11,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 01:53:11,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 01:53:11,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 01:53:11,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 01:53:11,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 01:53:11,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 01:53:11,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 01:53:11,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 01:53:11,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 01:53:11,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 01:53:11,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 01:53:11,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 01:53:11,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 01:53:11,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 01:53:11,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 01:53:11,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 01:53:11,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 01:53:11,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 01:53:11,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 01:53:11,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 01:53:11,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 01:53:11,658 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 01:53:11,681 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 01:53:11,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 01:53:11,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 01:53:11,683 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 01:53:11,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 01:53:11,684 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 01:53:11,684 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 01:53:11,684 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 01:53:11,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 01:53:11,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 01:53:11,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 01:53:11,686 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 01:53:11,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 01:53:11,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 01:53:11,686 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 01:53:11,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 01:53:11,688 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 01:53:11,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 01:53:11,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 01:53:11,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 01:53:11,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 01:53:11,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 01:53:11,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 01:53:11,690 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 01:53:11,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 01:53:11,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 01:53:11,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 01:53:11,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 01:53:11,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 01:53:11,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 01:53:11,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 01:53:11,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 01:53:11,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 01:53:11,693 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 01:53:11,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 01:53:11,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 01:53:11,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 01:53:11,694 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 01:53:11,994 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 01:53:12,016 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 01:53:12,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 01:53:12,021 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 01:53:12,021 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 01:53:12,022 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2019-11-24 01:53:12,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e643c3a77/1d695afb7d004b91803114acd42d2dd6/FLAG348672bc1 [2019-11-24 01:53:12,877 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 01:53:12,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2019-11-24 01:53:12,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e643c3a77/1d695afb7d004b91803114acd42d2dd6/FLAG348672bc1 [2019-11-24 01:53:13,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e643c3a77/1d695afb7d004b91803114acd42d2dd6 [2019-11-24 01:53:13,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 01:53:13,422 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 01:53:13,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 01:53:13,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 01:53:13,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 01:53:13,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:53:13" (1/1) ... [2019-11-24 01:53:13,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56cdc7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:13, skipping insertion in model container [2019-11-24 01:53:13,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:53:13" (1/1) ... [2019-11-24 01:53:13,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 01:53:13,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 01:53:14,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 01:53:14,778 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 01:53:14,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 01:53:15,056 INFO L208 MainTranslator]: Completed translation [2019-11-24 01:53:15,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15 WrapperNode [2019-11-24 01:53:15,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 01:53:15,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 01:53:15,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 01:53:15,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 01:53:15,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 01:53:15,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 01:53:15,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 01:53:15,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 01:53:15,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (1/1) ... [2019-11-24 01:53:15,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 01:53:15,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 01:53:15,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 01:53:15,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 01:53:15,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (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 01:53:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-24 01:53:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 01:53:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 01:53:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-11-24 01:53:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-11-24 01:53:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 01:53:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 01:53:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 01:53:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 01:53:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 01:53:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 01:53:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 01:53:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-11-24 01:53:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 01:53:15,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 01:53:18,688 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 01:53:18,689 INFO L284 CfgBuilder]: Removed 140 assume(true) statements. [2019-11-24 01:53:18,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:53:18 BoogieIcfgContainer [2019-11-24 01:53:18,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 01:53:18,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 01:53:18,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 01:53:18,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 01:53:18,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:53:13" (1/3) ... [2019-11-24 01:53:18,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d80eccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:53:18, skipping insertion in model container [2019-11-24 01:53:18,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:53:15" (2/3) ... [2019-11-24 01:53:18,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d80eccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:53:18, skipping insertion in model container [2019-11-24 01:53:18,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:53:18" (3/3) ... [2019-11-24 01:53:18,698 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2019-11-24 01:53:18,709 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 01:53:18,716 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 01:53:18,729 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 01:53:18,756 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 01:53:18,756 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 01:53:18,757 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 01:53:18,757 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 01:53:18,757 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 01:53:18,757 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 01:53:18,757 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 01:53:18,757 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 01:53:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2019-11-24 01:53:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 01:53:18,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:53:18,784 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 01:53:18,785 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:53:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:53:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash 219126765, now seen corresponding path program 1 times [2019-11-24 01:53:18,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:53:18,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519980314] [2019-11-24 01:53:18,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:53:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:19,273 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 01:53:19,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519980314] [2019-11-24 01:53:19,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:53:19,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:53:19,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69734814] [2019-11-24 01:53:19,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:53:19,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:53:19,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:53:19,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:53:19,302 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 3 states. [2019-11-24 01:53:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:53:19,432 INFO L93 Difference]: Finished difference Result 239 states and 411 transitions. [2019-11-24 01:53:19,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:53:19,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 01:53:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:53:19,456 INFO L225 Difference]: With dead ends: 239 [2019-11-24 01:53:19,456 INFO L226 Difference]: Without dead ends: 149 [2019-11-24 01:53:19,463 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 01:53:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-24 01:53:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2019-11-24 01:53:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-11-24 01:53:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 241 transitions. [2019-11-24 01:53:19,546 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 241 transitions. Word has length 12 [2019-11-24 01:53:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:53:19,547 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 241 transitions. [2019-11-24 01:53:19,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:53:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 241 transitions. [2019-11-24 01:53:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 01:53:19,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:53:19,550 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 01:53:19,550 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:53:19,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:53:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2125366849, now seen corresponding path program 1 times [2019-11-24 01:53:19,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:53:19,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242753473] [2019-11-24 01:53:19,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:53:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:19,671 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 01:53:19,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242753473] [2019-11-24 01:53:19,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:53:19,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:53:19,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565278182] [2019-11-24 01:53:19,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:53:19,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:53:19,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:53:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:53:19,676 INFO L87 Difference]: Start difference. First operand 149 states and 241 transitions. Second operand 3 states. [2019-11-24 01:53:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:53:19,714 INFO L93 Difference]: Finished difference Result 296 states and 479 transitions. [2019-11-24 01:53:19,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:53:19,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 01:53:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:53:19,717 INFO L225 Difference]: With dead ends: 296 [2019-11-24 01:53:19,717 INFO L226 Difference]: Without dead ends: 150 [2019-11-24 01:53:19,721 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 01:53:19,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-24 01:53:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2019-11-24 01:53:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-24 01:53:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 242 transitions. [2019-11-24 01:53:19,746 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 242 transitions. Word has length 16 [2019-11-24 01:53:19,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:53:19,750 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 242 transitions. [2019-11-24 01:53:19,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:53:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 242 transitions. [2019-11-24 01:53:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 01:53:19,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:53:19,753 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 01:53:19,753 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:53:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:53:19,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2101262572, now seen corresponding path program 1 times [2019-11-24 01:53:19,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:53:19,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810508289] [2019-11-24 01:53:19,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:53:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 01:53:19,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810508289] [2019-11-24 01:53:19,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:53:19,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 01:53:19,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042429345] [2019-11-24 01:53:19,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:53:19,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:53:19,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:53:19,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 01:53:19,885 INFO L87 Difference]: Start difference. First operand 150 states and 242 transitions. Second operand 4 states. [2019-11-24 01:53:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:53:20,039 INFO L93 Difference]: Finished difference Result 297 states and 479 transitions. [2019-11-24 01:53:20,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 01:53:20,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-24 01:53:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:53:20,045 INFO L225 Difference]: With dead ends: 297 [2019-11-24 01:53:20,045 INFO L226 Difference]: Without dead ends: 293 [2019-11-24 01:53:20,050 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 01:53:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-11-24 01:53:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 277. [2019-11-24 01:53:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2019-11-24 01:53:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 453 transitions. [2019-11-24 01:53:20,139 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 453 transitions. Word has length 17 [2019-11-24 01:53:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:53:20,140 INFO L462 AbstractCegarLoop]: Abstraction has 277 states and 453 transitions. [2019-11-24 01:53:20,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:53:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 453 transitions. [2019-11-24 01:53:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-24 01:53:20,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:53:20,143 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 01:53:20,143 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:53:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:53:20,144 INFO L82 PathProgramCache]: Analyzing trace with hash -636680679, now seen corresponding path program 1 times [2019-11-24 01:53:20,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:53:20,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805918510] [2019-11-24 01:53:20,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:53:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 01:53:20,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805918510] [2019-11-24 01:53:20,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 01:53:20,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 01:53:20,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441825410] [2019-11-24 01:53:20,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:53:20,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:53:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:53:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 01:53:20,207 INFO L87 Difference]: Start difference. First operand 277 states and 453 transitions. Second operand 3 states. [2019-11-24 01:53:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:53:20,298 INFO L93 Difference]: Finished difference Result 607 states and 986 transitions. [2019-11-24 01:53:20,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:53:20,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-24 01:53:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:53:20,302 INFO L225 Difference]: With dead ends: 607 [2019-11-24 01:53:20,302 INFO L226 Difference]: Without dead ends: 333 [2019-11-24 01:53:20,306 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 01:53:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2019-11-24 01:53:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2019-11-24 01:53:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-11-24 01:53:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 531 transitions. [2019-11-24 01:53:20,339 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 531 transitions. Word has length 32 [2019-11-24 01:53:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:53:20,339 INFO L462 AbstractCegarLoop]: Abstraction has 329 states and 531 transitions. [2019-11-24 01:53:20,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:53:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 531 transitions. [2019-11-24 01:53:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-24 01:53:20,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:53:20,347 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] [2019-11-24 01:53:20,348 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:53:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:53:20,350 INFO L82 PathProgramCache]: Analyzing trace with hash 454705046, now seen corresponding path program 1 times [2019-11-24 01:53:20,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:53:20,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605051087] [2019-11-24 01:53:20,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:53:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 01:53:20,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605051087] [2019-11-24 01:53:20,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058832425] [2019-11-24 01:53:20,525 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 01:53:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:20,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 01:53:20,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 01:53:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 01:53:20,849 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 01:53:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 01:53:20,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 01:53:20,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-24 01:53:20,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037854517] [2019-11-24 01:53:20,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 01:53:20,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:53:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 01:53:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 01:53:20,871 INFO L87 Difference]: Start difference. First operand 329 states and 531 transitions. Second operand 4 states. [2019-11-24 01:53:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:53:20,889 INFO L93 Difference]: Finished difference Result 656 states and 1059 transitions. [2019-11-24 01:53:20,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:53:20,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-11-24 01:53:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:53:20,892 INFO L225 Difference]: With dead ends: 656 [2019-11-24 01:53:20,892 INFO L226 Difference]: Without dead ends: 330 [2019-11-24 01:53:20,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 01:53:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-11-24 01:53:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2019-11-24 01:53:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2019-11-24 01:53:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 532 transitions. [2019-11-24 01:53:20,917 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 532 transitions. Word has length 40 [2019-11-24 01:53:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:53:20,917 INFO L462 AbstractCegarLoop]: Abstraction has 330 states and 532 transitions. [2019-11-24 01:53:20,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 01:53:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 532 transitions. [2019-11-24 01:53:20,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-24 01:53:20,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:53:20,921 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] [2019-11-24 01:53:21,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 01:53:21,126 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:53:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:53:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1876189871, now seen corresponding path program 1 times [2019-11-24 01:53:21,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:53:21,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325931659] [2019-11-24 01:53:21,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:53:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 01:53:21,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325931659] [2019-11-24 01:53:21,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551108065] [2019-11-24 01:53:21,278 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 01:53:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:21,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 01:53:21,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 01:53:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 01:53:21,579 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 01:53:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 01:53:21,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894711853] [2019-11-24 01:53:21,622 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2019-11-24 01:53:21,623 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 01:53:21,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 01:53:21,635 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 01:53:21,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 01:53:27,412 WARN L192 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 469 [2019-11-24 01:53:27,489 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:27,633 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 443 [2019-11-24 01:53:28,275 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2019-11-24 01:53:28,382 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 437 [2019-11-24 01:53:28,497 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:28,582 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:28,592 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 01:53:32,316 WARN L192 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 437 DAG size of output: 402 [2019-11-24 01:53:32,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 01:53:32,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 8 [2019-11-24 01:53:32,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215188150] [2019-11-24 01:53:32,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 01:53:32,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:53:32,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 01:53:32,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 01:53:32,324 INFO L87 Difference]: Start difference. First operand 330 states and 532 transitions. Second operand 3 states. [2019-11-24 01:53:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:53:32,944 INFO L93 Difference]: Finished difference Result 659 states and 1063 transitions. [2019-11-24 01:53:32,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 01:53:32,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-11-24 01:53:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:53:32,953 INFO L225 Difference]: With dead ends: 659 [2019-11-24 01:53:32,954 INFO L226 Difference]: Without dead ends: 331 [2019-11-24 01:53:32,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 01:53:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-11-24 01:53:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2019-11-24 01:53:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2019-11-24 01:53:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 533 transitions. [2019-11-24 01:53:32,971 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 533 transitions. Word has length 41 [2019-11-24 01:53:32,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:53:32,971 INFO L462 AbstractCegarLoop]: Abstraction has 331 states and 533 transitions. [2019-11-24 01:53:32,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 01:53:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 533 transitions. [2019-11-24 01:53:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-24 01:53:32,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:53:32,973 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] [2019-11-24 01:53:33,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 01:53:33,186 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:53:33,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:53:33,187 INFO L82 PathProgramCache]: Analyzing trace with hash -559141609, now seen corresponding path program 1 times [2019-11-24 01:53:33,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:53:33,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515510706] [2019-11-24 01:53:33,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:53:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-24 01:53:33,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515510706] [2019-11-24 01:53:33,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881008853] [2019-11-24 01:53:33,388 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 01:53:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:53:33,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 01:53:33,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 01:53:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-24 01:53:33,695 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 01:53:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-24 01:53:33,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537302035] [2019-11-24 01:53:33,724 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2019-11-24 01:53:33,725 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 01:53:33,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 01:53:33,726 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 01:53:33,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 01:53:33,854 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:36,490 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2019-11-24 01:53:36,854 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-11-24 01:53:37,043 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 487 [2019-11-24 01:53:37,624 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-11-24 01:53:37,698 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-11-24 01:53:38,281 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:38,650 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 282 [2019-11-24 01:53:38,698 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:38,720 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:39,064 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:39,092 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:39,542 WARN L192 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-24 01:53:39,935 WARN L192 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-24 01:53:40,330 WARN L192 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-24 01:53:40,576 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-24 01:53:40,627 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-11-24 01:53:40,745 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:40,789 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:41,237 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:41,459 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:42,834 WARN L192 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 399 [2019-11-24 01:53:44,727 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 425 DAG size of output: 423 [2019-11-24 01:53:46,546 WARN L192 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 427 [2019-11-24 01:53:46,670 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:46,680 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:46,807 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:46,950 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:47,470 WARN L192 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-24 01:53:48,038 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-24 01:53:48,351 WARN L192 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-24 01:53:48,549 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-11-24 01:53:48,749 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:49,014 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:49,203 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:49,351 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:50,121 WARN L192 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2019-11-24 01:53:51,483 WARN L192 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 420 [2019-11-24 01:53:53,018 WARN L192 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 424 [2019-11-24 01:53:53,096 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:53,107 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:53:53,836 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2019-11-24 01:53:54,106 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 01:53:54,546 WARN L192 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2019-11-24 01:53:57,364 WARN L192 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 281 DAG size of output: 242 [2019-11-24 01:53:59,604 WARN L192 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 283 DAG size of output: 246 [2019-11-24 01:54:01,968 WARN L192 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 294 DAG size of output: 257 [2019-11-24 01:54:04,371 WARN L192 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 296 DAG size of output: 259 [2019-11-24 01:54:06,671 WARN L192 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 291 DAG size of output: 249 [2019-11-24 01:54:09,182 WARN L192 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 304 DAG size of output: 260 [2019-11-24 01:54:11,677 WARN L192 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 311 DAG size of output: 262 [2019-11-24 01:54:14,160 WARN L192 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 311 DAG size of output: 252 [2019-11-24 01:54:16,689 WARN L192 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 289 DAG size of output: 249 [2019-11-24 01:54:19,231 WARN L192 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 304 DAG size of output: 252 [2019-11-24 01:54:19,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 01:54:19,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 20 [2019-11-24 01:54:19,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397120716] [2019-11-24 01:54:19,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-24 01:54:19,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 01:54:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-24 01:54:19,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2019-11-24 01:54:19,235 INFO L87 Difference]: Start difference. First operand 331 states and 533 transitions. Second operand 15 states. [2019-11-24 01:54:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 01:54:20,546 INFO L93 Difference]: Finished difference Result 520 states and 838 transitions. [2019-11-24 01:54:20,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-24 01:54:20,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2019-11-24 01:54:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 01:54:20,551 INFO L225 Difference]: With dead ends: 520 [2019-11-24 01:54:20,551 INFO L226 Difference]: Without dead ends: 194 [2019-11-24 01:54:20,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2019-11-24 01:54:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-24 01:54:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2019-11-24 01:54:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-24 01:54:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 293 transitions. [2019-11-24 01:54:20,578 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 293 transitions. Word has length 42 [2019-11-24 01:54:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 01:54:20,580 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 293 transitions. [2019-11-24 01:54:20,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-24 01:54:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 293 transitions. [2019-11-24 01:54:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-24 01:54:20,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 01:54:20,581 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 01:54:20,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 01:54:20,785 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 01:54:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 01:54:20,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1372399511, now seen corresponding path program 1 times [2019-11-24 01:54:20,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 01:54:20,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553291567] [2019-11-24 01:54:20,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 01:54:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:54:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-24 01:54:20,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553291567] [2019-11-24 01:54:20,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244161467] [2019-11-24 01:54:20,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 01:54:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 01:54:21,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 01:54:21,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 01:54:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-24 01:54:21,238 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 01:54:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-24 01:54:21,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1224159929] [2019-11-24 01:54:21,262 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2019-11-24 01:54:21,262 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 01:54:21,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 01:54:21,263 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 01:54:21,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 01:54:25,825 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 469 [2019-11-24 01:54:25,856 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:26,451 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2019-11-24 01:54:26,758 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-11-24 01:54:27,331 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-11-24 01:54:27,344 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-11-24 01:54:27,692 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:27,991 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 282 [2019-11-24 01:54:28,058 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:28,080 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:28,451 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:28,477 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:28,696 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-24 01:54:28,953 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-24 01:54:29,243 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-24 01:54:29,387 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-11-24 01:54:29,485 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:29,521 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:29,561 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:29,644 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:30,814 WARN L192 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2019-11-24 01:54:32,249 WARN L192 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 420 [2019-11-24 01:54:33,659 WARN L192 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 424 [2019-11-24 01:54:33,773 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:33,779 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:33,945 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:33,958 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:34,118 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:34,128 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:34,304 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:34,399 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:34,587 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-24 01:54:34,849 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-24 01:54:35,108 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-24 01:54:35,255 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-11-24 01:54:35,360 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:35,596 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:35,725 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:35,860 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 01:54:36,692 WARN L192 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2019-11-24 01:54:38,044 WARN L192 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 420