/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/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:30:36,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:30:36,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:30:36,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:30:36,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:30:36,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:30:36,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:30:36,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:30:36,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:30:36,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:30:36,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:30:36,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:30:36,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:30:36,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:30:36,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:30:36,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:30:36,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:30:36,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:30:36,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:30:36,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:30:36,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:30:36,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:30:36,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:30:36,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:30:36,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:30:36,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:30:36,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:30:36,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:30:36,490 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 01:30:36,509 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:30:36,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:30:36,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:30:36,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:30:36,515 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:30:36,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:30:36,515 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:30:36,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:30:36,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:30:36,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:30:36,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:30:36,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:30:36,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:30:36,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:30:36,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:30:36,518 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:30:36,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:30:36,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:30:36,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:30:36,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:30:36,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:30:36,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:30:36,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:30:36,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:30:36,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:30:36,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:30:36,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:30:36,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:30:36,521 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 01:30:36,781 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:30:36,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:30:36,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:30:36,803 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:30:36,803 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:30:36,803 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-11-07 01:30:36,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b397ae97/afe7a6cb70df463b9146eb28a6223f37/FLAG73a042c01 [2019-11-07 01:30:37,369 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:30:37,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-11-07 01:30:37,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b397ae97/afe7a6cb70df463b9146eb28a6223f37/FLAG73a042c01 [2019-11-07 01:30:37,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b397ae97/afe7a6cb70df463b9146eb28a6223f37 [2019-11-07 01:30:37,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:30:37,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:30:37,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:30:37,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:30:37,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:30:37,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:37" (1/1) ... [2019-11-07 01:30:37,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abe063b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:37, skipping insertion in model container [2019-11-07 01:30:37,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:37" (1/1) ... [2019-11-07 01:30:37,869 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:30:37,918 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:30:38,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:30:38,215 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:30:38,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:30:38,346 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:30:38,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38 WrapperNode [2019-11-07 01:30:38,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:30:38,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:30:38,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:30:38,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:30:38,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (1/1) ... [2019-11-07 01:30:38,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (1/1) ... [2019-11-07 01:30:38,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (1/1) ... [2019-11-07 01:30:38,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (1/1) ... [2019-11-07 01:30:38,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (1/1) ... [2019-11-07 01:30:38,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (1/1) ... [2019-11-07 01:30:38,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (1/1) ... [2019-11-07 01:30:38,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:30:38,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:30:38,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:30:38,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:30:38,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (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 01:30:38,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:30:38,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:30:38,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:30:38,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:30:38,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:30:38,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:30:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:30:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:30:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:30:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:30:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:30:38,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:30:38,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:30:38,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:30:38,937 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:30:38,937 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-07 01:30:38,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:38 BoogieIcfgContainer [2019-11-07 01:30:38,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:30:38,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:30:38,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:30:38,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:30:38,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:37" (1/3) ... [2019-11-07 01:30:38,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635c3ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:38, skipping insertion in model container [2019-11-07 01:30:38,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:38" (2/3) ... [2019-11-07 01:30:38,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635c3ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:38, skipping insertion in model container [2019-11-07 01:30:38,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:38" (3/3) ... [2019-11-07 01:30:38,946 INFO L109 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2019-11-07 01:30:38,956 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:30:38,962 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:30:38,973 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:30:38,997 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:30:38,997 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:30:38,997 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:30:38,997 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:30:38,997 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:30:38,998 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:30:38,998 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:30:38,998 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:30:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-07 01:30:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:30:39,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:39,021 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:39,024 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:39,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1948937736, now seen corresponding path program 1 times [2019-11-07 01:30:39,040 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:39,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845464464] [2019-11-07 01:30:39,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:39,125 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:39,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767180008] [2019-11-07 01:30:39,126 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 01:30:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:39,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:30:39,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:39,256 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 01:30:39,256 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:39,278 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 01:30:39,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845464464] [2019-11-07 01:30:39,279 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:39,279 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767180008] [2019-11-07 01:30:39,280 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:30:39,280 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:30:39,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753157434] [2019-11-07 01:30:39,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:30:39,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:39,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:30:39,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:30:39,302 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-11-07 01:30:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:39,384 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-11-07 01:30:39,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:30:39,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-07 01:30:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:39,396 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:30:39,396 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 01:30:39,400 INFO L630 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 [2019-11-07 01:30:39,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 01:30:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-07 01:30:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:30:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-07 01:30:39,444 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-11-07 01:30:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:39,444 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-07 01:30:39,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:30:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-07 01:30:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:30:39,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:39,446 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:39,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:39,650 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash -248559522, now seen corresponding path program 1 times [2019-11-07 01:30:39,652 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:39,653 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868920909] [2019-11-07 01:30:39,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:39,662 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:39,662 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652237920] [2019-11-07 01:30:39,662 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 01:30:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:39,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:30:39,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:39,740 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 01:30:39,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:39,765 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 01:30:39,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868920909] [2019-11-07 01:30:39,766 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:39,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652237920] [2019-11-07 01:30:39,767 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:30:39,767 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:30:39,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764648400] [2019-11-07 01:30:39,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:30:39,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:39,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:30:39,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:30:39,770 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-11-07 01:30:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:39,930 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-11-07 01:30:39,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:30:39,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-07 01:30:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:39,946 INFO L225 Difference]: With dead ends: 60 [2019-11-07 01:30:39,946 INFO L226 Difference]: Without dead ends: 42 [2019-11-07 01:30:39,947 INFO L630 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 [2019-11-07 01:30:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-07 01:30:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-11-07 01:30:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-07 01:30:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2019-11-07 01:30:39,971 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2019-11-07 01:30:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:39,971 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2019-11-07 01:30:39,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:30:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2019-11-07 01:30:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 01:30:39,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:39,975 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:40,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:40,179 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:40,180 INFO L82 PathProgramCache]: Analyzing trace with hash 513897878, now seen corresponding path program 1 times [2019-11-07 01:30:40,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:40,180 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762118278] [2019-11-07 01:30:40,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:40,200 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:40,200 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492029969] [2019-11-07 01:30:40,203 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 01:30:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:40,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:30:40,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:30:40,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:30:40,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762118278] [2019-11-07 01:30:40,306 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:40,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492029969] [2019-11-07 01:30:40,306 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:30:40,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:30:40,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644342318] [2019-11-07 01:30:40,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:30:40,309 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:40,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:30:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:30:40,311 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 6 states. [2019-11-07 01:30:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:40,450 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-11-07 01:30:40,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:30:40,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-07 01:30:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:40,453 INFO L225 Difference]: With dead ends: 94 [2019-11-07 01:30:40,454 INFO L226 Difference]: Without dead ends: 62 [2019-11-07 01:30:40,455 INFO L630 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 [2019-11-07 01:30:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-07 01:30:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-11-07 01:30:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-07 01:30:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2019-11-07 01:30:40,481 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 26 [2019-11-07 01:30:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:40,483 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2019-11-07 01:30:40,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:30:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2019-11-07 01:30:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:30:40,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:40,486 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:40,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:40,700 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1528936726, now seen corresponding path program 1 times [2019-11-07 01:30:40,701 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:40,701 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857573509] [2019-11-07 01:30:40,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:40,733 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:40,733 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647031158] [2019-11-07 01:30:40,738 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 01:30:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:40,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:30:40,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 01:30:40,842 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 01:30:40,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857573509] [2019-11-07 01:30:40,891 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:40,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647031158] [2019-11-07 01:30:40,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1252553024] [2019-11-07 01:30:40,935 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:30:40,935 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:40,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:40,963 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:40,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:41,132 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:41,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:41,619 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:41,876 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:30:41,877 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6] total 18 [2019-11-07 01:30:41,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998385076] [2019-11-07 01:30:41,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 01:30:41,879 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 01:30:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:30:41,879 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2019-11-07 01:30:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:42,383 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2019-11-07 01:30:42,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:30:42,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-07 01:30:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:42,385 INFO L225 Difference]: With dead ends: 88 [2019-11-07 01:30:42,386 INFO L226 Difference]: Without dead ends: 63 [2019-11-07 01:30:42,387 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:30:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-07 01:30:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-07 01:30:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-07 01:30:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-11-07 01:30:42,404 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-11-07 01:30:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:42,404 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-11-07 01:30:42,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 01:30:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-11-07 01:30:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-07 01:30:42,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:42,410 INFO L410 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] [2019-11-07 01:30:42,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:42,614 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1810393368, now seen corresponding path program 1 times [2019-11-07 01:30:42,615 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:42,615 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274024977] [2019-11-07 01:30:42,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:42,624 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:42,625 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270939653] [2019-11-07 01:30:42,625 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 01:30:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:42,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:30:42,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:30:42,731 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:30:42,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274024977] [2019-11-07 01:30:42,765 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:42,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270939653] [2019-11-07 01:30:42,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583206529] [2019-11-07 01:30:42,767 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:30:42,768 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:42,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:42,768 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:42,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:42,790 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:43,384 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:30:43,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:43,393 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:43,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:43,909 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17] total 26 [2019-11-07 01:30:43,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29335372] [2019-11-07 01:30:43,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 01:30:43,910 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 01:30:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2019-11-07 01:30:43,911 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 26 states. [2019-11-07 01:30:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:45,202 INFO L93 Difference]: Finished difference Result 167 states and 241 transitions. [2019-11-07 01:30:45,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:30:45,202 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2019-11-07 01:30:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:45,204 INFO L225 Difference]: With dead ends: 167 [2019-11-07 01:30:45,204 INFO L226 Difference]: Without dead ends: 116 [2019-11-07 01:30:45,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=1423, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 01:30:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-07 01:30:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-11-07 01:30:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-07 01:30:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2019-11-07 01:30:45,243 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 44 [2019-11-07 01:30:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:45,244 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2019-11-07 01:30:45,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 01:30:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2019-11-07 01:30:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-07 01:30:45,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:45,246 INFO L410 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] [2019-11-07 01:30:45,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:45,451 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash 158989464, now seen corresponding path program 2 times [2019-11-07 01:30:45,452 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:45,452 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825076865] [2019-11-07 01:30:45,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:45,466 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:45,466 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936847540] [2019-11-07 01:30:45,467 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 01:30:45,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:30:45,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:45,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:30:45,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-11-07 01:30:45,589 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-11-07 01:30:45,627 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825076865] [2019-11-07 01:30:45,627 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:45,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936847540] [2019-11-07 01:30:45,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125969611] [2019-11-07 01:30:45,631 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:30:45,631 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:45,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:45,632 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:45,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:45,656 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:46,047 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:30:46,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:46,054 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:46,525 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:46,525 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 17] total 24 [2019-11-07 01:30:46,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320334886] [2019-11-07 01:30:46,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:30:46,526 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:30:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:30:46,527 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand 24 states. [2019-11-07 01:30:46,869 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2019-11-07 01:30:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:48,219 INFO L93 Difference]: Finished difference Result 393 states and 501 transitions. [2019-11-07 01:30:48,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:30:48,221 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2019-11-07 01:30:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:48,225 INFO L225 Difference]: With dead ends: 393 [2019-11-07 01:30:48,225 INFO L226 Difference]: Without dead ends: 326 [2019-11-07 01:30:48,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:30:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-11-07 01:30:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 199. [2019-11-07 01:30:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-07 01:30:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2019-11-07 01:30:48,283 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 68 [2019-11-07 01:30:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:48,284 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2019-11-07 01:30:48,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:30:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2019-11-07 01:30:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:30:48,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:48,287 INFO L410 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] [2019-11-07 01:30:48,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:48,498 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash -195326932, now seen corresponding path program 3 times [2019-11-07 01:30:48,499 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:48,499 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146249044] [2019-11-07 01:30:48,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:48,514 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:48,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041025482] [2019-11-07 01:30:48,514 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 01:30:48,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:30:48,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:48,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 69 conjunts are in the unsatisfiable core [2019-11-07 01:30:48,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:11,735 WARN L191 SmtUtils]: Spent 16.14 s on a formula simplification. DAG size of input: 53 DAG size of output: 35