/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/rev-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:30:40,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:30:40,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:30:40,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:30:40,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:30:40,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:30:40,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:30:40,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:30:40,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:30:40,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:30:40,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:30:40,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:30:40,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:30:40,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:30:40,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:30:40,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:30:40,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:30:40,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:30:40,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:30:40,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:30:40,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:30:40,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:30:40,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:30:40,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:30:40,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:30:40,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:30:40,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:30:40,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:30:40,708 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 01:30:40,741 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:30:40,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:30:40,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:30:40,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:30:40,745 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:30:40,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:30:40,745 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:30:40,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:30:40,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:30:40,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:30:40,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:30:40,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:30:40,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:30:40,750 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:30:40,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:30:40,750 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:30:40,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:30:40,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:30:40,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:30:40,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:30:40,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:30:40,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:30:40,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:30:40,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:30:40,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:30:40,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:30:40,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:30:40,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:30:40,753 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 01:30:41,035 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:30:41,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:30:41,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:30:41,053 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:30:41,054 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:30:41,054 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c [2019-11-07 01:30:41,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/282fe2b20/05886d64296f442bafa96fd10ffd89bc/FLAG913741afc [2019-11-07 01:30:41,601 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:30:41,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c [2019-11-07 01:30:41,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/282fe2b20/05886d64296f442bafa96fd10ffd89bc/FLAG913741afc [2019-11-07 01:30:41,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/282fe2b20/05886d64296f442bafa96fd10ffd89bc [2019-11-07 01:30:41,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:30:41,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:30:41,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:30:41,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:30:41,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:30:41,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:41" (1/1) ... [2019-11-07 01:30:41,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442ae0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:41, skipping insertion in model container [2019-11-07 01:30:41,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:41" (1/1) ... [2019-11-07 01:30:41,973 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:30:41,991 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:30:42,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:30:42,202 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:30:42,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:30:42,254 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:30:42,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42 WrapperNode [2019-11-07 01:30:42,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:30:42,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:30:42,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:30:42,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:30:42,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (1/1) ... [2019-11-07 01:30:42,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (1/1) ... [2019-11-07 01:30:42,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (1/1) ... [2019-11-07 01:30:42,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (1/1) ... [2019-11-07 01:30:42,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (1/1) ... [2019-11-07 01:30:42,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (1/1) ... [2019-11-07 01:30:42,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (1/1) ... [2019-11-07 01:30:42,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:30:42,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:30:42,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:30:42,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:30:42,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (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 01:30:42,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:30:42,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:30:42,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:30:42,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:30:42,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:30:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:30:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:30:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:30:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:30:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:30:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:30:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:30:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:30:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:30:42,865 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:30:42,865 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-07 01:30:42,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:42 BoogieIcfgContainer [2019-11-07 01:30:42,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:30:42,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:30:42,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:30:42,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:30:42,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:41" (1/3) ... [2019-11-07 01:30:42,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cfbbff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:42, skipping insertion in model container [2019-11-07 01:30:42,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:42" (2/3) ... [2019-11-07 01:30:42,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cfbbff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:42, skipping insertion in model container [2019-11-07 01:30:42,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:42" (3/3) ... [2019-11-07 01:30:42,874 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-2-n-u.c [2019-11-07 01:30:42,883 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:30:42,891 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:30:42,902 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:30:42,926 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:30:42,926 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:30:42,926 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:30:42,926 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:30:42,927 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:30:42,927 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:30:42,927 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:30:42,927 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:30:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:30:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:30:42,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:42,948 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:42,950 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:42,955 INFO L82 PathProgramCache]: Analyzing trace with hash 357994483, now seen corresponding path program 1 times [2019-11-07 01:30:42,962 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:42,962 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818785143] [2019-11-07 01:30:42,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:43,041 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:43,042 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818674464] [2019-11-07 01:30:43,042 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 01:30:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:43,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:30:43,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:43,165 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 01:30:43,165 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:43,198 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 01:30:43,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818785143] [2019-11-07 01:30:43,199 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:43,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818674464] [2019-11-07 01:30:43,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:30:43,201 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:30:43,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973465345] [2019-11-07 01:30:43,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:30:43,207 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:30:43,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:30:43,225 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-07 01:30:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:43,319 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-07 01:30:43,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:30:43,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:30:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:43,330 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:30:43,331 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:30:43,334 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 01:30:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:30:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:30:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:30:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-07 01:30:43,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-11-07 01:30:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:43,376 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-07 01:30:43,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:30:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-07 01:30:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:30:43,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:43,378 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:43,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:43,582 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash -964628371, now seen corresponding path program 1 times [2019-11-07 01:30:43,583 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:43,584 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041421089] [2019-11-07 01:30:43,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:43,594 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:43,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054814650] [2019-11-07 01:30:43,595 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 01:30:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:43,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:30:43,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:43,665 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 01:30:43,665 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:43,691 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 01:30:43,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041421089] [2019-11-07 01:30:43,691 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:43,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054814650] [2019-11-07 01:30:43,692 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:30:43,692 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:30:43,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205442270] [2019-11-07 01:30:43,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:30:43,694 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:43,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:30:43,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:30:43,695 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-11-07 01:30:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:43,837 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2019-11-07 01:30:43,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:30:43,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-07 01:30:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:43,842 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:30:43,842 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:30:43,844 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 01:30:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:30:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-07 01:30:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:30:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-11-07 01:30:43,875 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2019-11-07 01:30:43,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:43,876 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-11-07 01:30:43,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:30:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-11-07 01:30:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:30:43,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:43,879 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:44,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:44,083 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:44,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1384779757, now seen corresponding path program 1 times [2019-11-07 01:30:44,085 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:44,085 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191810690] [2019-11-07 01:30:44,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:44,096 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:44,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531507682] [2019-11-07 01:30:44,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:30:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:44,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:30:44,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:44,210 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 01:30:44,211 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:44,270 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 01:30:44,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191810690] [2019-11-07 01:30:44,271 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:44,271 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531507682] [2019-11-07 01:30:44,271 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656708605] [2019-11-07 01:30:44,297 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:30:44,298 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:44,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:44,311 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:44,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:44,451 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:44,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:44,950 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:45,234 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2019-11-07 01:30:45,299 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:30:45,299 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-11-07 01:30:45,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381939835] [2019-11-07 01:30:45,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 01:30:45,302 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 01:30:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:30:45,304 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2019-11-07 01:30:45,569 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2019-11-07 01:30:45,785 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-11-07 01:30:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:46,014 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-11-07 01:30:46,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:30:46,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-07 01:30:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:46,016 INFO L225 Difference]: With dead ends: 53 [2019-11-07 01:30:46,016 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:30:46,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:30:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:30:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-11-07 01:30:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 01:30:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-07 01:30:46,030 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 21 [2019-11-07 01:30:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:46,030 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-07 01:30:46,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 01:30:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-07 01:30:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:30:46,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:46,032 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:46,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:46,235 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:46,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1560648546, now seen corresponding path program 1 times [2019-11-07 01:30:46,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:46,242 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25511985] [2019-11-07 01:30:46,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:46,271 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:46,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062168728] [2019-11-07 01:30:46,280 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 01:30:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:46,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:30:46,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:30:46,514 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:30:46,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25511985] [2019-11-07 01:30:46,605 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:46,605 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062168728] [2019-11-07 01:30:46,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112903865] [2019-11-07 01:30:46,609 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:30:46,610 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:46,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:46,612 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:46,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:46,674 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:47,159 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2019-11-07 01:30:47,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:47,170 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:47,463 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2019-11-07 01:30:47,796 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:47,796 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 24 [2019-11-07 01:30:47,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633948209] [2019-11-07 01:30:47,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:30:47,798 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:47,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:30:47,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:30:47,800 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 24 states. [2019-11-07 01:30:48,078 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-11-07 01:30:48,562 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-11-07 01:30:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:49,380 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2019-11-07 01:30:49,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:30:49,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2019-11-07 01:30:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:49,382 INFO L225 Difference]: With dead ends: 92 [2019-11-07 01:30:49,382 INFO L226 Difference]: Without dead ends: 68 [2019-11-07 01:30:49,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=323, Invalid=1237, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:30:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-07 01:30:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-11-07 01:30:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-07 01:30:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-11-07 01:30:49,401 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 25 [2019-11-07 01:30:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:49,402 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-11-07 01:30:49,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:30:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-11-07 01:30:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-07 01:30:49,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:49,403 INFO L410 BasicCegarLoop]: trace histogram [12, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:49,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:49,611 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:49,611 INFO L82 PathProgramCache]: Analyzing trace with hash 223123874, now seen corresponding path program 2 times [2019-11-07 01:30:49,612 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:49,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995077353] [2019-11-07 01:30:49,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:49,624 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:49,624 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528645458] [2019-11-07 01:30:49,624 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 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 01:30:49,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:30:49,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:49,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:30:49,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:30:49,759 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:30:49,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995077353] [2019-11-07 01:30:49,786 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:49,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528645458] [2019-11-07 01:30:49,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395725002] [2019-11-07 01:30:49,788 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:30:49,789 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:49,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:49,789 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:49,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:49,808 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:50,258 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2019-11-07 01:30:50,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:50,271 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:50,556 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2019-11-07 01:30:50,868 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:50,868 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-11-07 01:30:50,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045674341] [2019-11-07 01:30:50,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:30:50,869 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:50,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:30:50,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:30:50,870 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 22 states. [2019-11-07 01:30:51,179 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2019-11-07 01:30:51,532 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2019-11-07 01:30:51,808 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2019-11-07 01:30:52,085 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2019-11-07 01:30:52,369 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-11-07 01:30:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:53,160 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2019-11-07 01:30:53,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:30:53,161 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-11-07 01:30:53,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:53,164 INFO L225 Difference]: With dead ends: 206 [2019-11-07 01:30:53,164 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 01:30:53,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2019-11-07 01:30:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 01:30:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2019-11-07 01:30:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-07 01:30:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2019-11-07 01:30:53,193 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 37 [2019-11-07 01:30:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:53,193 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2019-11-07 01:30:53,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 01:30:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2019-11-07 01:30:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:30:53,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:53,196 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:53,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:53,400 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash -353902917, now seen corresponding path program 3 times [2019-11-07 01:30:53,401 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:53,401 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115374412] [2019-11-07 01:30:53,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:53,424 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:53,424 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21171130] [2019-11-07 01:30:53,424 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 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 01:30:55,722 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:30:55,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:55,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 82 conjunts are in the unsatisfiable core [2019-11-07 01:30:55,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:56,115 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 60 [2019-11-07 01:30:56,581 WARN L191 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 73 [2019-11-07 01:30:57,205 WARN L191 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 89 [2019-11-07 01:30:58,081 WARN L191 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 101 [2019-11-07 01:31:01,568 WARN L191 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 509 DAG size of output: 356