/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/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/copy-partial-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:29:01,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:29:01,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:29:01,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:29:01,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:29:01,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:29:01,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:29:01,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:29:01,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:29:01,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:29:01,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:29:01,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:29:01,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:29:01,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:29:01,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:29:01,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:29:01,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:29:01,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:29:01,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:29:01,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:29:01,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:29:01,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:29:01,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:29:01,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:29:01,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:29:01,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:29:01,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:29:01,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:29:01,932 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 [2019-11-07 01:29:01,958 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:29:01,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:29:01,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:29:01,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:29:01,960 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:29:01,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:29:01,960 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:29:01,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:29:01,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:29:01,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:29:01,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:29:01,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:29:01,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:29:01,963 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:29:01,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:29:01,963 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:29:01,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:29:01,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:29:01,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:29:01,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:29:01,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:29:01,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:01,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:29:01,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:29:01,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:29:01,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:29:01,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:29:01,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:29:01,970 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 [2019-11-07 01:29:02,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:29:02,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:29:02,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:29:02,280 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:29:02,281 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:29:02,282 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-11-07 01:29:02,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78955e801/edd5c59b011d4431ae8f86190fcb14fa/FLAGe9ffd9dc7 [2019-11-07 01:29:02,797 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:29:02,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-11-07 01:29:02,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78955e801/edd5c59b011d4431ae8f86190fcb14fa/FLAGe9ffd9dc7 [2019-11-07 01:29:03,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78955e801/edd5c59b011d4431ae8f86190fcb14fa [2019-11-07 01:29:03,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:29:03,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:29:03,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:03,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:29:03,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:29:03,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acb9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03, skipping insertion in model container [2019-11-07 01:29:03,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,294 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:29:03,344 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:29:03,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:03,669 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:29:03,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:03,819 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:29:03,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03 WrapperNode [2019-11-07 01:29:03,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:03,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:29:03,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:29:03,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:29:03,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:29:03,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:29:03,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:29:03,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:29:03,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (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 [2019-11-07 01:29:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:29:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:29:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:29:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:29:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:29:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:29:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:29:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:29:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:29:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:29:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:29:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:29:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:29:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:29:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:29:04,299 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:29:04,299 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-07 01:29:04,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:04 BoogieIcfgContainer [2019-11-07 01:29:04,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:29:04,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:29:04,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:29:04,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:29:04,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:03" (1/3) ... [2019-11-07 01:29:04,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1984cd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:04, skipping insertion in model container [2019-11-07 01:29:04,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (2/3) ... [2019-11-07 01:29:04,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1984cd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:04, skipping insertion in model container [2019-11-07 01:29:04,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:04" (3/3) ... [2019-11-07 01:29:04,311 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2019-11-07 01:29:04,325 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:29:04,334 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:29:04,348 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:29:04,380 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:29:04,380 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:29:04,380 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:29:04,380 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:29:04,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:29:04,381 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:29:04,381 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:29:04,381 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:29:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:29:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:29:04,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:04,406 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:04,408 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 357994483, now seen corresponding path program 1 times [2019-11-07 01:29:04,424 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:04,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859209436] [2019-11-07 01:29:04,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:04,498 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:04,499 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007825616] [2019-11-07 01:29:04,499 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 [2019-11-07 01:29:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:04,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:04,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:04,625 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:04,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859209436] [2019-11-07 01:29:04,662 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:04,663 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007825616] [2019-11-07 01:29:04,663 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:04,664 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:29:04,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048625928] [2019-11-07 01:29:04,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:29:04,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:29:04,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:04,687 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-07 01:29:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:04,775 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-07 01:29:04,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:29:04,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:29:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:04,793 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:29:04,793 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:29:04,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:29:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:29:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:29:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-07 01:29:04,843 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-11-07 01:29:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:04,844 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-07 01:29:04,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:29:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-07 01:29:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:29:04,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:04,845 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:05,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:05,053 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash -964628371, now seen corresponding path program 1 times [2019-11-07 01:29:05,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:05,056 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766871927] [2019-11-07 01:29:05,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:05,097 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:05,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421072026] [2019-11-07 01:29:05,097 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 [2019-11-07 01:29:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:05,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:05,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:05,229 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:05,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766871927] [2019-11-07 01:29:05,260 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:05,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421072026] [2019-11-07 01:29:05,262 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:05,262 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:05,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566703353] [2019-11-07 01:29:05,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:05,264 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:05,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:05,265 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-11-07 01:29:05,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:05,412 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2019-11-07 01:29:05,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:05,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-07 01:29:05,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:05,417 INFO L225 Difference]: With dead ends: 53 [2019-11-07 01:29:05,418 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:29:05,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:29:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:29:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-11-07 01:29:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:29:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-07 01:29:05,434 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2019-11-07 01:29:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:05,435 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-07 01:29:05,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-07 01:29:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:29:05,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:05,436 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:05,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:05,648 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1384779757, now seen corresponding path program 1 times [2019-11-07 01:29:05,650 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:05,651 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684646409] [2019-11-07 01:29:05,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:05,663 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:05,664 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148458390] [2019-11-07 01:29:05,664 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 [2019-11-07 01:29:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:05,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:05,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:29:05,805 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:29:05,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684646409] [2019-11-07 01:29:05,852 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:05,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148458390] [2019-11-07 01:29:05,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022760658] [2019-11-07 01:29:05,878 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:29:05,878 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:05,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:05,892 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:05,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:06,045 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:06,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:06,466 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:06,745 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-11-07 01:29:06,808 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:29:06,808 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-11-07 01:29:06,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844408457] [2019-11-07 01:29:06,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 01:29:06,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 01:29:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:29:06,812 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2019-11-07 01:29:07,073 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-11-07 01:29:07,280 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-11-07 01:29:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:07,450 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2019-11-07 01:29:07,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:29:07,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-07 01:29:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:07,452 INFO L225 Difference]: With dead ends: 43 [2019-11-07 01:29:07,452 INFO L226 Difference]: Without dead ends: 32 [2019-11-07 01:29:07,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:07,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-07 01:29:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-11-07 01:29:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:29:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-07 01:29:07,462 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2019-11-07 01:29:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:07,462 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-07 01:29:07,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 01:29:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-07 01:29:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 01:29:07,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:07,464 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:07,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:07,667 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash -843921470, now seen corresponding path program 1 times [2019-11-07 01:29:07,668 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:07,669 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53907837] [2019-11-07 01:29:07,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:07,676 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:07,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967497202] [2019-11-07 01:29:07,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:07,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:07,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:29:07,780 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:29:07,816 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53907837] [2019-11-07 01:29:07,816 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:07,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967497202] [2019-11-07 01:29:07,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821025045] [2019-11-07 01:29:07,820 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:07,820 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:07,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:07,822 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:07,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:07,846 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:08,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:08,165 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:08,453 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-11-07 01:29:08,593 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:29:08,594 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6] total 20 [2019-11-07 01:29:08,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256783066] [2019-11-07 01:29:08,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 01:29:08,595 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:08,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 01:29:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-11-07 01:29:08,596 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 12 states. [2019-11-07 01:29:08,898 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2019-11-07 01:29:09,181 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-11-07 01:29:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:09,610 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-11-07 01:29:09,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 01:29:09,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-07 01:29:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:09,611 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:29:09,611 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 01:29:09,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:29:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 01:29:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-07 01:29:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-07 01:29:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-11-07 01:29:09,620 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 23 [2019-11-07 01:29:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:09,621 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-11-07 01:29:09,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 01:29:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-11-07 01:29:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 01:29:09,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:09,622 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:09,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:09,823 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1976738209, now seen corresponding path program 1 times [2019-11-07 01:29:09,824 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:09,825 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889531309] [2019-11-07 01:29:09,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:09,831 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:09,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068063275] [2019-11-07 01:29:09,832 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 [2019-11-07 01:29:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:09,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:09,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:29:09,924 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:29:09,954 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889531309] [2019-11-07 01:29:09,954 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:09,954 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068063275] [2019-11-07 01:29:09,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900862369] [2019-11-07 01:29:09,956 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:09,956 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:09,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:09,961 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:09,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:09,987 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:10,284 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:10,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:10,291 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:10,605 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-11-07 01:29:10,870 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:10,870 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 24 [2019-11-07 01:29:10,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99981682] [2019-11-07 01:29:10,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:29:10,872 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:10,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:29:10,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:10,873 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 24 states. [2019-11-07 01:29:11,186 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-11-07 01:29:11,587 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-11-07 01:29:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:13,112 INFO L93 Difference]: Finished difference Result 112 states and 164 transitions. [2019-11-07 01:29:13,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:29:13,113 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2019-11-07 01:29:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:13,114 INFO L225 Difference]: With dead ends: 112 [2019-11-07 01:29:13,114 INFO L226 Difference]: Without dead ends: 90 [2019-11-07 01:29:13,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=475, Invalid=1687, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 01:29:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-07 01:29:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 39. [2019-11-07 01:29:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-07 01:29:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-11-07 01:29:13,129 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 24 [2019-11-07 01:29:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:13,130 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-11-07 01:29:13,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:29:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-11-07 01:29:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:29:13,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:13,131 INFO L410 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:13,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:13,334 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash -743084193, now seen corresponding path program 2 times [2019-11-07 01:29:13,335 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:13,335 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388913111] [2019-11-07 01:29:13,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:13,368 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:13,368 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700203288] [2019-11-07 01:29:13,368 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 [2019-11-07 01:29:13,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:29:13,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:13,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:29:13,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-07 01:29:13,488 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-07 01:29:13,529 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388913111] [2019-11-07 01:29:13,530 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:13,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700203288] [2019-11-07 01:29:13,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850486559] [2019-11-07 01:29:13,531 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:13,532 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:13,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:13,532 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:13,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:13,565 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:13,899 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2019-11-07 01:29:13,985 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:13,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:13,991 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:14,244 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-11-07 01:29:14,498 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:14,499 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-11-07 01:29:14,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867789874] [2019-11-07 01:29:14,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:29:14,500 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:14,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:29:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:29:14,501 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 22 states. [2019-11-07 01:29:14,733 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2019-11-07 01:29:14,992 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-11-07 01:29:15,224 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-11-07 01:29:15,873 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-11-07 01:29:16,431 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-11-07 01:29:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:16,672 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2019-11-07 01:29:16,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 01:29:16,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-11-07 01:29:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:16,675 INFO L225 Difference]: With dead ends: 108 [2019-11-07 01:29:16,675 INFO L226 Difference]: Without dead ends: 96 [2019-11-07 01:29:16,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2019-11-07 01:29:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-07 01:29:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 51. [2019-11-07 01:29:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-07 01:29:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2019-11-07 01:29:16,690 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 32 [2019-11-07 01:29:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:16,690 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2019-11-07 01:29:16,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 01:29:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2019-11-07 01:29:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-07 01:29:16,692 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:16,692 INFO L410 BasicCegarLoop]: trace histogram [12, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:16,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:16,902 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:16,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1700125282, now seen corresponding path program 3 times [2019-11-07 01:29:16,903 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:16,903 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812061555] [2019-11-07 01:29:16,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:16,909 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:16,909 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111766119] [2019-11-07 01:29:16,909 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 [2019-11-07 01:29:16,972 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:29:16,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:16,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:29:16,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-07 01:29:16,996 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-07 01:29:17,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812061555] [2019-11-07 01:29:17,020 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:17,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111766119] [2019-11-07 01:29:17,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94149941] [2019-11-07 01:29:17,022 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:17,022 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:17,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:17,023 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:17,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:17,044 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:17,351 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:17,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:17,359 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:17,617 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-11-07 01:29:17,840 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:17,841 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 19 [2019-11-07 01:29:17,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677607747] [2019-11-07 01:29:17,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-07 01:29:17,842 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-07 01:29:17,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2019-11-07 01:29:17,843 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 19 states. [2019-11-07 01:29:18,067 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-11-07 01:29:18,373 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-11-07 01:29:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:18,936 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2019-11-07 01:29:18,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:29:18,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2019-11-07 01:29:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:18,937 INFO L225 Difference]: With dead ends: 83 [2019-11-07 01:29:18,937 INFO L226 Difference]: Without dead ends: 58 [2019-11-07 01:29:18,938 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2019-11-07 01:29:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-07 01:29:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2019-11-07 01:29:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-07 01:29:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2019-11-07 01:29:18,950 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 38 [2019-11-07 01:29:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:18,951 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2019-11-07 01:29:18,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-07 01:29:18,951 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2019-11-07 01:29:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-07 01:29:18,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:18,952 INFO L410 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:19,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:19,155 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:19,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1043215469, now seen corresponding path program 4 times [2019-11-07 01:29:19,156 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:19,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611672676] [2019-11-07 01:29:19,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:19,163 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:19,163 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934041292] [2019-11-07 01:29:19,163 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:19,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 01:29:19,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:29:19,322 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:29:19,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611672676] [2019-11-07 01:29:19,409 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:19,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934041292] [2019-11-07 01:29:19,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428358599] [2019-11-07 01:29:19,411 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:19,411 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:19,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:19,412 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:19,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:19,433 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:19,673 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:19,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:19,679 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:19,958 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-11-07 01:29:20,179 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:20,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 32 [2019-11-07 01:29:20,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888988744] [2019-11-07 01:29:20,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-07 01:29:20,180 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:20,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-07 01:29:20,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-11-07 01:29:20,182 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 32 states. [2019-11-07 01:29:20,452 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-11-07 01:29:21,277 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-11-07 01:29:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:23,859 INFO L93 Difference]: Finished difference Result 263 states and 388 transitions. [2019-11-07 01:29:23,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-07 01:29:23,859 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2019-11-07 01:29:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:23,862 INFO L225 Difference]: With dead ends: 263 [2019-11-07 01:29:23,863 INFO L226 Difference]: Without dead ends: 230 [2019-11-07 01:29:23,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1164, Invalid=3666, Unknown=0, NotChecked=0, Total=4830 [2019-11-07 01:29:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-11-07 01:29:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 62. [2019-11-07 01:29:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-07 01:29:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2019-11-07 01:29:23,887 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 41 [2019-11-07 01:29:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:23,887 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2019-11-07 01:29:23,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-07 01:29:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2019-11-07 01:29:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-07 01:29:23,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:23,889 INFO L410 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:24,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:24,093 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash -269381011, now seen corresponding path program 5 times [2019-11-07 01:29:24,094 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:24,094 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239844420] [2019-11-07 01:29:24,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:24,100 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:24,101 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099063238] [2019-11-07 01:29:24,101 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:24,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-07 01:29:24,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:24,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:29:24,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-11-07 01:29:24,197 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-11-07 01:29:24,219 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239844420] [2019-11-07 01:29:24,219 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:24,219 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099063238] [2019-11-07 01:29:24,219 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617187413] [2019-11-07 01:29:24,220 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:24,221 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:24,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:24,221 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:24,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:24,238 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:24,504 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:24,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:24,509 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:24,811 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-11-07 01:29:25,150 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:25,151 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-11-07 01:29:25,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447281493] [2019-11-07 01:29:25,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:29:25,154 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:29:25,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:29:25,155 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 22 states. [2019-11-07 01:29:25,449 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-11-07 01:29:25,946 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-11-07 01:29:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:26,726 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2019-11-07 01:29:26,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:29:26,727 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2019-11-07 01:29:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:26,728 INFO L225 Difference]: With dead ends: 114 [2019-11-07 01:29:26,728 INFO L226 Difference]: Without dead ends: 93 [2019-11-07 01:29:26,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2019-11-07 01:29:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-07 01:29:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2019-11-07 01:29:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-07 01:29:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2019-11-07 01:29:26,754 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 57 [2019-11-07 01:29:26,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:26,754 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2019-11-07 01:29:26,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 01:29:26,754 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2019-11-07 01:29:26,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-07 01:29:26,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:26,756 INFO L410 BasicCegarLoop]: trace histogram [28, 16, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:26,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:26,959 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:26,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1266040127, now seen corresponding path program 6 times [2019-11-07 01:29:26,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:26,960 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422826920] [2019-11-07 01:29:26,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:26,967 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:26,967 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860957443] [2019-11-07 01:29:26,967 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:33,647 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:29:33,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:33,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-07 01:29:33,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:34,275 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 74 [2019-11-07 01:29:34,706 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 96 [2019-11-07 01:29:35,573 WARN L191 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 171 [2019-11-07 01:29:35,807 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 57 [2019-11-07 01:29:36,501 WARN L191 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 140 [2019-11-07 01:29:36,634 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 57 [2019-11-07 01:29:38,278 WARN L191 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 361 DAG size of output: 265 [2019-11-07 01:29:38,716 WARN L191 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 67 [2019-11-07 01:29:40,438 WARN L191 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 437 DAG size of output: 242 [2019-11-07 01:29:40,790 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 69 [2019-11-07 01:29:42,824 WARN L191 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 524 DAG size of output: 268 [2019-11-07 01:29:43,216 WARN L191 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 75 [2019-11-07 01:29:45,085 WARN L191 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 618 DAG size of output: 239 [2019-11-07 01:29:45,359 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 74