/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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 03:29:27,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 03:29:27,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 03:29:27,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 03:29:27,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 03:29:27,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 03:29:27,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 03:29:27,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 03:29:27,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 03:29:27,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 03:29:27,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 03:29:27,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 03:29:27,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 03:29:27,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 03:29:27,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 03:29:27,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 03:29:27,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 03:29:27,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 03:29:27,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 03:29:27,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 03:29:27,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 03:29:27,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 03:29:27,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 03:29:27,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 03:29:27,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 03:29:27,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 03:29:27,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 03:29:27,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 03:29:27,503 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 03:29:27,540 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 03:29:27,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 03:29:27,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 03:29:27,541 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 03:29:27,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 03:29:27,541 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 03:29:27,545 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 03:29:27,545 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 03:29:27,545 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 03:29:27,545 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 03:29:27,546 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 03:29:27,546 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 03:29:27,546 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 03:29:27,546 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 03:29:27,546 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 03:29:27,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 03:29:27,550 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 03:29:27,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 03:29:27,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 03:29:27,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 03:29:27,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 03:29:27,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 03:29:27,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 03:29:27,551 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 03:29:27,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 03:29:27,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 03:29:27,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 03:29:27,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 03:29:27,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 03:29:27,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:29:27,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 03:29:27,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 03:29:27,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 03:29:27,554 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 03:29:27,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 03:29:27,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 03:29:27,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 03:29:27,554 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 03:29:27,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 03:29:27,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 03:29:27,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 03:29:27,901 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 03:29:27,901 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 03:29:27,902 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2019-11-24 03:29:27,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5db5fce/1ed37791fbaa4568b8e942176bc88397/FLAGa0a2acd47 [2019-11-24 03:29:28,772 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 03:29:28,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2019-11-24 03:29:28,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5db5fce/1ed37791fbaa4568b8e942176bc88397/FLAGa0a2acd47 [2019-11-24 03:29:29,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5db5fce/1ed37791fbaa4568b8e942176bc88397 [2019-11-24 03:29:29,322 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 03:29:29,323 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 03:29:29,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 03:29:29,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 03:29:29,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 03:29:29,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:29:29" (1/1) ... [2019-11-24 03:29:29,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57cabdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:29, skipping insertion in model container [2019-11-24 03:29:29,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:29:29" (1/1) ... [2019-11-24 03:29:29,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 03:29:29,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 03:29:30,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:29:30,657 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 03:29:30,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:29:30,959 INFO L208 MainTranslator]: Completed translation [2019-11-24 03:29:30,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30 WrapperNode [2019-11-24 03:29:30,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 03:29:30,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 03:29:30,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 03:29:30,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 03:29:30,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 03:29:31,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 03:29:31,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 03:29:31,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 03:29:31,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (1/1) ... [2019-11-24 03:29:31,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 03:29:31,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 03:29:31,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 03:29:31,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 03:29:31,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (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 03:29:31,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 03:29:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 03:29:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 03:29:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 03:29:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 03:29:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 03:29:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 03:29:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 03:29:31,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 03:29:32,363 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 03:29:32,363 INFO L284 CfgBuilder]: Removed 56 assume(true) statements. [2019-11-24 03:29:32,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:29:32 BoogieIcfgContainer [2019-11-24 03:29:32,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 03:29:32,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 03:29:32,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 03:29:32,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 03:29:32,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 03:29:29" (1/3) ... [2019-11-24 03:29:32,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbb0038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:29:32, skipping insertion in model container [2019-11-24 03:29:32,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:29:30" (2/3) ... [2019-11-24 03:29:32,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbb0038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:29:32, skipping insertion in model container [2019-11-24 03:29:32,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:29:32" (3/3) ... [2019-11-24 03:29:32,375 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2019-11-24 03:29:32,387 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 03:29:32,396 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 03:29:32,412 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 03:29:32,438 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 03:29:32,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 03:29:32,438 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 03:29:32,439 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 03:29:32,439 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 03:29:32,439 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 03:29:32,439 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 03:29:32,439 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 03:29:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-11-24 03:29:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 03:29:32,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:29:32,465 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:29:32,466 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:29:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:29:32,472 INFO L82 PathProgramCache]: Analyzing trace with hash -112608090, now seen corresponding path program 1 times [2019-11-24 03:29:32,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:29:32,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846204273] [2019-11-24 03:29:32,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:29:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:32,986 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 03:29:32,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846204273] [2019-11-24 03:29:32,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:29:32,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:29:32,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142322918] [2019-11-24 03:29:32,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:29:32,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:29:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:29:33,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:29:33,012 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2019-11-24 03:29:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:29:33,108 INFO L93 Difference]: Finished difference Result 98 states and 158 transitions. [2019-11-24 03:29:33,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:29:33,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 03:29:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:29:33,127 INFO L225 Difference]: With dead ends: 98 [2019-11-24 03:29:33,128 INFO L226 Difference]: Without dead ends: 57 [2019-11-24 03:29:33,135 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 03:29:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-24 03:29:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-11-24 03:29:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-24 03:29:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 85 transitions. [2019-11-24 03:29:33,195 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 85 transitions. Word has length 13 [2019-11-24 03:29:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:29:33,196 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 85 transitions. [2019-11-24 03:29:33,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:29:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 85 transitions. [2019-11-24 03:29:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 03:29:33,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:29:33,198 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:29:33,199 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:29:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:29:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash -627575521, now seen corresponding path program 1 times [2019-11-24 03:29:33,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:29:33,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139766012] [2019-11-24 03:29:33,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:29:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:33,374 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 03:29:33,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139766012] [2019-11-24 03:29:33,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:29:33,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:29:33,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330737863] [2019-11-24 03:29:33,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:29:33,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:29:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:29:33,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:29:33,379 INFO L87 Difference]: Start difference. First operand 55 states and 85 transitions. Second operand 3 states. [2019-11-24 03:29:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:29:33,412 INFO L93 Difference]: Finished difference Result 93 states and 144 transitions. [2019-11-24 03:29:33,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:29:33,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 03:29:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:29:33,415 INFO L225 Difference]: With dead ends: 93 [2019-11-24 03:29:33,415 INFO L226 Difference]: Without dead ends: 90 [2019-11-24 03:29:33,416 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 03:29:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-24 03:29:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-11-24 03:29:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-24 03:29:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 140 transitions. [2019-11-24 03:29:33,438 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 140 transitions. Word has length 15 [2019-11-24 03:29:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:29:33,438 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 140 transitions. [2019-11-24 03:29:33,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:29:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 140 transitions. [2019-11-24 03:29:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 03:29:33,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:29:33,440 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:29:33,440 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:29:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:29:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1172536868, now seen corresponding path program 1 times [2019-11-24 03:29:33,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:29:33,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398423244] [2019-11-24 03:29:33,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:29:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:33,543 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 03:29:33,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398423244] [2019-11-24 03:29:33,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:29:33,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:29:33,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368976880] [2019-11-24 03:29:33,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:29:33,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:29:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:29:33,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:29:33,545 INFO L87 Difference]: Start difference. First operand 90 states and 140 transitions. Second operand 3 states. [2019-11-24 03:29:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:29:33,586 INFO L93 Difference]: Finished difference Result 172 states and 266 transitions. [2019-11-24 03:29:33,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:29:33,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 03:29:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:29:33,588 INFO L225 Difference]: With dead ends: 172 [2019-11-24 03:29:33,588 INFO L226 Difference]: Without dead ends: 87 [2019-11-24 03:29:33,589 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 03:29:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-24 03:29:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2019-11-24 03:29:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-24 03:29:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2019-11-24 03:29:33,602 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 16 [2019-11-24 03:29:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:29:33,602 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2019-11-24 03:29:33,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:29:33,604 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2019-11-24 03:29:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 03:29:33,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:29:33,605 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] [2019-11-24 03:29:33,605 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:29:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:29:33,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2064788419, now seen corresponding path program 1 times [2019-11-24 03:29:33,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:29:33,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047810529] [2019-11-24 03:29:33,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:29:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:29:33,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047810529] [2019-11-24 03:29:33,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576169164] [2019-11-24 03:29:33,823 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 03:29:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:34,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 03:29:34,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:29:34,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 03:29:34,214 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:29:34,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 03:29:34,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 03:29:34,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 7 [2019-11-24 03:29:34,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358239514] [2019-11-24 03:29:34,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 03:29:34,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:29:34,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 03:29:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-24 03:29:34,264 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand 6 states. [2019-11-24 03:29:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:29:34,384 INFO L93 Difference]: Finished difference Result 174 states and 276 transitions. [2019-11-24 03:29:34,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 03:29:34,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-24 03:29:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:29:34,387 INFO L225 Difference]: With dead ends: 174 [2019-11-24 03:29:34,387 INFO L226 Difference]: Without dead ends: 172 [2019-11-24 03:29:34,387 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-24 03:29:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-24 03:29:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 82. [2019-11-24 03:29:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-24 03:29:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2019-11-24 03:29:34,400 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 24 [2019-11-24 03:29:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:29:34,400 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2019-11-24 03:29:34,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 03:29:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2019-11-24 03:29:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-24 03:29:34,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:29:34,402 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] [2019-11-24 03:29:34,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:29:34,607 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:29:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:29:34,608 INFO L82 PathProgramCache]: Analyzing trace with hash 582368570, now seen corresponding path program 1 times [2019-11-24 03:29:34,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:29:34,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758396216] [2019-11-24 03:29:34,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:29:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 03:29:34,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758396216] [2019-11-24 03:29:34,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494207342] [2019-11-24 03:29:34,787 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 03:29:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:34,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 03:29:34,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:29:34,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:34,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:35,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:35,018 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 03:29:35,019 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:29:35,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:35,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:35,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:35,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:35,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:29:35,082 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 03:29:35,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 03:29:35,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-11-24 03:29:35,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703368740] [2019-11-24 03:29:35,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 03:29:35,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:29:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 03:29:35,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 03:29:35,085 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 5 states. [2019-11-24 03:29:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:29:35,175 INFO L93 Difference]: Finished difference Result 208 states and 327 transitions. [2019-11-24 03:29:35,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 03:29:35,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-24 03:29:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:29:35,178 INFO L225 Difference]: With dead ends: 208 [2019-11-24 03:29:35,178 INFO L226 Difference]: Without dead ends: 204 [2019-11-24 03:29:35,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-24 03:29:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-24 03:29:35,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 83. [2019-11-24 03:29:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-24 03:29:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 130 transitions. [2019-11-24 03:29:35,194 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 130 transitions. Word has length 30 [2019-11-24 03:29:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:29:35,194 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 130 transitions. [2019-11-24 03:29:35,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 03:29:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 130 transitions. [2019-11-24 03:29:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-24 03:29:35,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:29:35,198 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] [2019-11-24 03:29:35,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:29:35,404 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:29:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:29:35,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1552807726, now seen corresponding path program 1 times [2019-11-24 03:29:35,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:29:35,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931982818] [2019-11-24 03:29:35,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:29:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:35,546 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 03:29:35,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931982818] [2019-11-24 03:29:35,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:29:35,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:29:35,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943116057] [2019-11-24 03:29:35,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:29:35,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:29:35,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:29:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:29:35,550 INFO L87 Difference]: Start difference. First operand 83 states and 130 transitions. Second operand 3 states. [2019-11-24 03:29:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:29:35,566 INFO L93 Difference]: Finished difference Result 165 states and 259 transitions. [2019-11-24 03:29:35,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:29:35,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-24 03:29:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:29:35,568 INFO L225 Difference]: With dead ends: 165 [2019-11-24 03:29:35,569 INFO L226 Difference]: Without dead ends: 84 [2019-11-24 03:29:35,570 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 03:29:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-24 03:29:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-11-24 03:29:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-24 03:29:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 131 transitions. [2019-11-24 03:29:35,584 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 131 transitions. Word has length 32 [2019-11-24 03:29:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:29:35,584 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 131 transitions. [2019-11-24 03:29:35,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:29:35,585 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 131 transitions. [2019-11-24 03:29:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-24 03:29:35,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:29:35,591 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] [2019-11-24 03:29:35,591 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:29:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:29:35,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1715555088, now seen corresponding path program 1 times [2019-11-24 03:29:35,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:29:35,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183031413] [2019-11-24 03:29:35,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:29:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:35,774 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 03:29:35,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183031413] [2019-11-24 03:29:35,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:29:35,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:29:35,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299312801] [2019-11-24 03:29:35,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:29:35,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:29:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:29:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:29:35,777 INFO L87 Difference]: Start difference. First operand 84 states and 131 transitions. Second operand 3 states. [2019-11-24 03:29:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:29:35,797 INFO L93 Difference]: Finished difference Result 165 states and 258 transitions. [2019-11-24 03:29:35,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:29:35,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-11-24 03:29:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:29:35,799 INFO L225 Difference]: With dead ends: 165 [2019-11-24 03:29:35,799 INFO L226 Difference]: Without dead ends: 86 [2019-11-24 03:29:35,801 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 03:29:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-24 03:29:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-24 03:29:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-24 03:29:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 133 transitions. [2019-11-24 03:29:35,820 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 133 transitions. Word has length 33 [2019-11-24 03:29:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:29:35,820 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 133 transitions. [2019-11-24 03:29:35,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:29:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 133 transitions. [2019-11-24 03:29:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-24 03:29:35,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:29:35,822 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] [2019-11-24 03:29:35,822 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:29:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:29:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash -513119010, now seen corresponding path program 1 times [2019-11-24 03:29:35,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:29:35,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828785152] [2019-11-24 03:29:35,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:29:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 03:29:35,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828785152] [2019-11-24 03:29:35,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952553186] [2019-11-24 03:29:35,992 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 03:29:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:29:36,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-24 03:29:36,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:29:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 03:29:36,282 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:29:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 03:29:36,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2055314707] [2019-11-24 03:29:36,461 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2019-11-24 03:29:36,461 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:29:36,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:29:36,479 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:29:36,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:29:38,033 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 530 [2019-11-24 03:29:38,124 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:29:38,233 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 510 [2019-11-24 03:29:38,680 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 500 [2019-11-24 03:29:38,917 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 518 [2019-11-24 03:29:39,148 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 516 [2019-11-24 03:29:40,451 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 519 [2019-11-24 03:29:40,964 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 589 [2019-11-24 03:29:41,076 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:29:41,344 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 589 [2019-11-24 03:29:41,574 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 587 [2019-11-24 03:29:42,794 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 589 [2019-11-24 03:29:42,944 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:29:43,137 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 595 [2019-11-24 03:29:43,563 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2019-11-24 03:29:43,777 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 701 [2019-11-24 03:29:44,123 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 698 [2019-11-24 03:29:44,143 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21