java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-multidimensional/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:20,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:20,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:20,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:20,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:20,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:20,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:20,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:20,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:20,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:20,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:20,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:20,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:20,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:20,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:20,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:20,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:20,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:20,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:20,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:20,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:20,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:20,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:20,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:20,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:37:20,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:20,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:20,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:20,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:37:20,440 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:20,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:20,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:20,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:20,442 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:20,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:20,442 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:20,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:20,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:20,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:20,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:20,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:20,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:20,446 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:20,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:20,449 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:20,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:20,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:20,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:20,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:20,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:20,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:20,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:20,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:20,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:20,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:20,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:20,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:20,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:37:20,758 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:20,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:20,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:20,775 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:20,776 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:20,777 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-10-15 01:37:20,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c89a268/e1e6cc64e220499eab116eb6f5bf1892/FLAGc1d1e7950 [2019-10-15 01:37:21,393 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:21,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-10-15 01:37:21,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c89a268/e1e6cc64e220499eab116eb6f5bf1892/FLAGc1d1e7950 [2019-10-15 01:37:21,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c89a268/e1e6cc64e220499eab116eb6f5bf1892 [2019-10-15 01:37:21,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:21,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:21,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:21,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:21,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:21,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:21" (1/1) ... [2019-10-15 01:37:21,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1168eabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:21, skipping insertion in model container [2019-10-15 01:37:21,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:21" (1/1) ... [2019-10-15 01:37:21,814 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:21,840 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:22,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:22,051 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:22,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:22,198 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:22,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22 WrapperNode [2019-10-15 01:37:22,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:22,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:22,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:22,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:22,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:22,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:22,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:22,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:22,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (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 [2019-10-15 01:37:22,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:22,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:22,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:22,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:22,806 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:22,806 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:37:22,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:22 BoogieIcfgContainer [2019-10-15 01:37:22,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:22,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:22,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:22,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:22,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:21" (1/3) ... [2019-10-15 01:37:22,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b5079c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:22, skipping insertion in model container [2019-10-15 01:37:22,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (2/3) ... [2019-10-15 01:37:22,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b5079c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:22, skipping insertion in model container [2019-10-15 01:37:22,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:22" (3/3) ... [2019-10-15 01:37:22,817 INFO L109 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2019-10-15 01:37:22,826 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:22,835 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:22,847 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:22,872 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:22,872 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:22,873 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:22,873 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:22,873 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:22,873 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:22,874 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:22,874 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-15 01:37:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:37:22,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:22,896 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:22,899 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:22,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1948937736, now seen corresponding path program 1 times [2019-10-15 01:37:22,911 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:22,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427199904] [2019-10-15 01:37:22,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:22,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:22,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:23,003 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:23,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074488518] [2019-10-15 01:37:23,004 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 [2019-10-15 01:37:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:23,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:23,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:23,130 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:23,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427199904] [2019-10-15 01:37:23,156 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:23,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074488518] [2019-10-15 01:37:23,157 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:23,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:37:23,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130820707] [2019-10-15 01:37:23,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:37:23,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:37:23,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:23,182 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-10-15 01:37:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:23,272 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-10-15 01:37:23,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:37:23,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 01:37:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:23,282 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:37:23,283 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:37:23,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:37:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:37:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:37:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-10-15 01:37:23,323 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-10-15 01:37:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:23,324 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-10-15 01:37:23,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:37:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-10-15 01:37:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:37:23,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:23,325 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:23,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:23,538 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:23,539 INFO L82 PathProgramCache]: Analyzing trace with hash -248559522, now seen corresponding path program 1 times [2019-10-15 01:37:23,539 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:23,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998901876] [2019-10-15 01:37:23,540 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:23,540 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:23,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:23,550 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:23,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805290973] [2019-10-15 01:37:23,551 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 [2019-10-15 01:37:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:23,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:23,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:23,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:23,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998901876] [2019-10-15 01:37:23,648 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:23,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805290973] [2019-10-15 01:37:23,649 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:23,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:23,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147450985] [2019-10-15 01:37:23,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:23,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:23,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:23,653 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-10-15 01:37:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:23,857 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-10-15 01:37:23,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:23,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-15 01:37:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:23,863 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:37:23,863 INFO L226 Difference]: Without dead ends: 42 [2019-10-15 01:37:23,866 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-15 01:37:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-15 01:37:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:37:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2019-10-15 01:37:23,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2019-10-15 01:37:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:23,897 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2019-10-15 01:37:23,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2019-10-15 01:37:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:37:23,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:23,902 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:24,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:24,107 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:24,108 INFO L82 PathProgramCache]: Analyzing trace with hash 513897878, now seen corresponding path program 1 times [2019-10-15 01:37:24,108 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:24,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028081077] [2019-10-15 01:37:24,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,110 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:24,118 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:24,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048751829] [2019-10-15 01:37:24,119 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 [2019-10-15 01:37:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:24,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:24,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:24,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:24,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028081077] [2019-10-15 01:37:24,223 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:24,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048751829] [2019-10-15 01:37:24,224 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:24,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:24,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627485750] [2019-10-15 01:37:24,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:24,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:24,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:24,226 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 6 states. [2019-10-15 01:37:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:24,335 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-10-15 01:37:24,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:24,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-15 01:37:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:24,337 INFO L225 Difference]: With dead ends: 94 [2019-10-15 01:37:24,337 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:37:24,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:37:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-15 01:37:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:37:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2019-10-15 01:37:24,353 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 26 [2019-10-15 01:37:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:24,353 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2019-10-15 01:37:24,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2019-10-15 01:37:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:37:24,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:24,355 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:24,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:24,560 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1528936726, now seen corresponding path program 1 times [2019-10-15 01:37:24,561 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:24,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211533722] [2019-10-15 01:37:24,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:24,575 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:24,575 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836548710] [2019-10-15 01:37:24,575 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 [2019-10-15 01:37:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:24,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:24,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:37:24,709 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:37:24,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211533722] [2019-10-15 01:37:24,788 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:24,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836548710] [2019-10-15 01:37:24,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [201928696] [2019-10-15 01:37:24,818 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:37:24,819 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:24,826 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:24,836 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:24,837 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:25,106 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:25,768 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:37:25,780 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:25,787 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:26,044 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:37:26,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6] total 18 [2019-10-15 01:37:26,044 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57476621] [2019-10-15 01:37:26,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:37:26,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:37:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:37:26,047 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2019-10-15 01:37:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:26,565 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2019-10-15 01:37:26,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:37:26,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-10-15 01:37:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:26,567 INFO L225 Difference]: With dead ends: 88 [2019-10-15 01:37:26,568 INFO L226 Difference]: Without dead ends: 63 [2019-10-15 01:37:26,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:37:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-15 01:37:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-15 01:37:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:37:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-10-15 01:37:26,594 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-10-15 01:37:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:26,594 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-10-15 01:37:26,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:37:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-10-15 01:37:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:37:26,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:26,600 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:26,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:26,806 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:26,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1810393368, now seen corresponding path program 1 times [2019-10-15 01:37:26,806 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:26,807 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891519052] [2019-10-15 01:37:26,807 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:26,807 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:26,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:26,825 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:26,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824117142] [2019-10-15 01:37:26,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:26,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:26,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:37:26,943 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:37:26,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891519052] [2019-10-15 01:37:26,982 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:26,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824117142] [2019-10-15 01:37:26,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149168227] [2019-10-15 01:37:26,984 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:37:26,985 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:26,986 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:26,988 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:26,988 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:27,021 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:27,785 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:27,799 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:27,802 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:28,395 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:28,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17] total 26 [2019-10-15 01:37:28,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73723018] [2019-10-15 01:37:28,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:37:28,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:28,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:37:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:37:28,399 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 26 states. [2019-10-15 01:37:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:29,846 INFO L93 Difference]: Finished difference Result 167 states and 241 transitions. [2019-10-15 01:37:29,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:37:29,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2019-10-15 01:37:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:29,851 INFO L225 Difference]: With dead ends: 167 [2019-10-15 01:37:29,851 INFO L226 Difference]: Without dead ends: 116 [2019-10-15 01:37:29,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=383, Invalid=1423, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:37:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-15 01:37:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-10-15 01:37:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-15 01:37:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2019-10-15 01:37:29,875 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 44 [2019-10-15 01:37:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:29,875 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2019-10-15 01:37:29,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:37:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2019-10-15 01:37:29,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 01:37:29,877 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:29,877 INFO L380 BasicCegarLoop]: trace histogram [24, 12, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:30,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:30,082 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash 158989464, now seen corresponding path program 2 times [2019-10-15 01:37:30,083 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:30,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805632387] [2019-10-15 01:37:30,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:30,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:30,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:30,105 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:30,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965524196] [2019-10-15 01:37:30,105 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:30,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:37:30,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:30,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:37:30,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-15 01:37:30,248 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-15 01:37:30,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805632387] [2019-10-15 01:37:30,286 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:30,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965524196] [2019-10-15 01:37:30,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [407901678] [2019-10-15 01:37:30,296 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:37:30,296 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:30,296 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:30,297 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:30,297 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:30,330 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:30,978 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:30,991 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:30,995 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:31,528 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:31,528 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 17] total 24 [2019-10-15 01:37:31,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997403907] [2019-10-15 01:37:31,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:37:31,530 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:31,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:37:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:37:31,531 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand 24 states. [2019-10-15 01:37:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:32,992 INFO L93 Difference]: Finished difference Result 393 states and 501 transitions. [2019-10-15 01:37:32,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:37:32,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2019-10-15 01:37:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:32,995 INFO L225 Difference]: With dead ends: 393 [2019-10-15 01:37:32,996 INFO L226 Difference]: Without dead ends: 326 [2019-10-15 01:37:32,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:37:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-15 01:37:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 199. [2019-10-15 01:37:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-15 01:37:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2019-10-15 01:37:33,037 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 68 [2019-10-15 01:37:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:33,038 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2019-10-15 01:37:33,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:37:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2019-10-15 01:37:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:37:33,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:33,041 INFO L380 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:33,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:33,245 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:33,246 INFO L82 PathProgramCache]: Analyzing trace with hash -195326932, now seen corresponding path program 3 times [2019-10-15 01:37:33,246 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:33,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264696488] [2019-10-15 01:37:33,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:33,247 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:33,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:33,260 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:33,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702281058] [2019-10-15 01:37:33,260 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:33,490 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:33,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:33,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 69 conjunts are in the unsatisfiable core [2019-10-15 01:37:33,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:56,178 WARN L191 SmtUtils]: Spent 16.15 s on a formula simplification. DAG size of input: 53 DAG size of output: 35