/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/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:28:58,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:28:58,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:28:58,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:28:58,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:28:58,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:28:58,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:28:58,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:28:58,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:28:58,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:28:58,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:28:58,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:28:58,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:28:58,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:28:58,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:28:58,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:28:58,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:28:58,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:28:58,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:28:58,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:28:58,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:28:58,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:28:58,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:28:58,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:28:58,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:28:58,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:28:58,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:28:58,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:28:58,663 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 01:28:58,689 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:28:58,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:28:58,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:28:58,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:28:58,692 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:28:58,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:28:58,692 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:28:58,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:28:58,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:28:58,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:28:58,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:28:58,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:28:58,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:28:58,695 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:28:58,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:28:58,696 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:28:58,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:28:58,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:28:58,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:28:58,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:28:58,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:28:58,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:28:58,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:28:58,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:28:58,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:28:58,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:28:58,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:28:58,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:28:58,698 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 01:28:59,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:28:59,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:28:59,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:28:59,043 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:28:59,044 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:28:59,044 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-11-07 01:28:59,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/733a4b6d8/02196fa346334c7a996182e0587d8e52/FLAGf14530f6c [2019-11-07 01:28:59,542 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:28:59,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-11-07 01:28:59,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/733a4b6d8/02196fa346334c7a996182e0587d8e52/FLAGf14530f6c [2019-11-07 01:28:59,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/733a4b6d8/02196fa346334c7a996182e0587d8e52 [2019-11-07 01:29:00,001 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:29:00,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:29:00,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:00,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:29:00,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:29:00,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:59" (1/1) ... [2019-11-07 01:29:00,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510f79ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00, skipping insertion in model container [2019-11-07 01:29:00,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:59" (1/1) ... [2019-11-07 01:29:00,061 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:29:00,123 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:29:00,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:00,410 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:29:00,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:00,578 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:29:00,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00 WrapperNode [2019-11-07 01:29:00,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:00,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:29:00,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:29:00,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:29:00,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (1/1) ... [2019-11-07 01:29:00,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (1/1) ... [2019-11-07 01:29:00,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (1/1) ... [2019-11-07 01:29:00,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (1/1) ... [2019-11-07 01:29:00,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (1/1) ... [2019-11-07 01:29:00,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (1/1) ... [2019-11-07 01:29:00,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (1/1) ... [2019-11-07 01:29:00,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:29:00,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:29:00,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:29:00,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:29:00,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:00,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:29:00,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:29:00,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:29:00,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:29:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:29:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:29:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-07 01:29:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:29:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:29:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:29:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:29:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:29:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:29:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:29:01,095 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:29:01,096 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-07 01:29:01,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:01 BoogieIcfgContainer [2019-11-07 01:29:01,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:29:01,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:29:01,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:29:01,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:29:01,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:28:59" (1/3) ... [2019-11-07 01:29:01,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212fd75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:01, skipping insertion in model container [2019-11-07 01:29:01,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:00" (2/3) ... [2019-11-07 01:29:01,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212fd75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:01, skipping insertion in model container [2019-11-07 01:29:01,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:01" (3/3) ... [2019-11-07 01:29:01,105 INFO L109 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2019-11-07 01:29:01,116 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:29:01,125 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:29:01,137 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:29:01,161 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:29:01,161 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:29:01,162 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:29:01,162 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:29:01,162 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:29:01,162 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:29:01,162 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:29:01,163 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:29:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:29:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:29:01,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:01,185 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:01,187 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1167341109, now seen corresponding path program 1 times [2019-11-07 01:29:01,200 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:01,201 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197104297] [2019-11-07 01:29:01,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:01,278 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:01,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546744800] [2019-11-07 01:29:01,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:01,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:01,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:01,417 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:01,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197104297] [2019-11-07 01:29:01,453 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:01,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546744800] [2019-11-07 01:29:01,454 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:01,454 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:29:01,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917609385] [2019-11-07 01:29:01,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:29:01,462 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:01,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:29:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:01,480 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-07 01:29:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:01,577 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-07 01:29:01,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:29:01,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:29:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:01,589 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:29:01,590 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:29:01,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:29:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:29:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:29:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-07 01:29:01,636 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-11-07 01:29:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:01,637 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-07 01:29:01,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:29:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-07 01:29:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:29:01,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:01,638 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:01,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:01,843 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash -155281745, now seen corresponding path program 1 times [2019-11-07 01:29:01,844 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:01,844 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249422251] [2019-11-07 01:29:01,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:01,888 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:01,889 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031447589] [2019-11-07 01:29:01,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:02,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:02,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:02,069 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:02,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249422251] [2019-11-07 01:29:02,145 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:02,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031447589] [2019-11-07 01:29:02,147 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:02,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:02,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009502590] [2019-11-07 01:29:02,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:02,151 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:02,152 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-11-07 01:29:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:02,302 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2019-11-07 01:29:02,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:02,303 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-07 01:29:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:02,306 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:29:02,307 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:29:02,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:29:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:29:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-07 01:29:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:29:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-11-07 01:29:02,340 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2019-11-07 01:29:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:02,345 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-11-07 01:29:02,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-11-07 01:29:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:29:02,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:02,349 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:02,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:02,552 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2100840913, now seen corresponding path program 1 times [2019-11-07 01:29:02,554 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:02,554 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505587501] [2019-11-07 01:29:02,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:02,574 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:02,583 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816912844] [2019-11-07 01:29:02,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:02,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:02,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:29:02,702 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:29:02,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505587501] [2019-11-07 01:29:02,750 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:02,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816912844] [2019-11-07 01:29:02,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684350774] [2019-11-07 01:29:02,776 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:29:02,777 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:02,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:02,791 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:02,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:02,940 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:03,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:03,458 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:03,809 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-11-07 01:29:03,877 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:29:03,877 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-11-07 01:29:03,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624519915] [2019-11-07 01:29:03,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 01:29:03,879 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 01:29:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:29:03,880 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2019-11-07 01:29:04,153 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2019-11-07 01:29:04,433 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-11-07 01:29:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:04,658 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-11-07 01:29:04,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:29:04,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-07 01:29:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:04,660 INFO L225 Difference]: With dead ends: 53 [2019-11-07 01:29:04,660 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:29:04,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:29:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-11-07 01:29:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 01:29:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-07 01:29:04,674 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 21 [2019-11-07 01:29:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:04,674 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-07 01:29:04,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 01:29:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-07 01:29:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:29:04,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:04,675 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 01:29:04,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:04,879 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2111829734, now seen corresponding path program 1 times [2019-11-07 01:29:04,879 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:04,880 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668109468] [2019-11-07 01:29:04,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:04,890 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:04,890 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59519501] [2019-11-07 01:29:04,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:04,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:05,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:05,064 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 01:29:05,065 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:05,143 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 01:29:05,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668109468] [2019-11-07 01:29:05,147 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:05,148 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59519501] [2019-11-07 01:29:05,148 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525620706] [2019-11-07 01:29:05,153 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:05,153 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:05,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:05,155 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:05,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:05,232 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:06,221 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2019-11-07 01:29:06,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:06,232 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:06,562 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-11-07 01:29:09,013 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:09,014 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 24 [2019-11-07 01:29:09,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141843862] [2019-11-07 01:29:09,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:29:09,015 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:09,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:29:09,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=464, Unknown=1, NotChecked=0, Total=552 [2019-11-07 01:29:09,016 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 24 states. [2019-11-07 01:29:09,363 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-11-07 01:29:09,988 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-11-07 01:29:16,862 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 65 [2019-11-07 01:29:21,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:21,536 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2019-11-07 01:29:21,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:29:21,537 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2019-11-07 01:29:21,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:21,538 INFO L225 Difference]: With dead ends: 92 [2019-11-07 01:29:21,538 INFO L226 Difference]: Without dead ends: 68 [2019-11-07 01:29:21,539 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=323, Invalid=1235, Unknown=2, NotChecked=0, Total=1560 [2019-11-07 01:29:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-07 01:29:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-11-07 01:29:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-07 01:29:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-11-07 01:29:21,559 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 25 [2019-11-07 01:29:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:21,559 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-11-07 01:29:21,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:29:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-11-07 01:29:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-07 01:29:21,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:21,561 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 01:29:21,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:21,762 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2053538854, now seen corresponding path program 2 times [2019-11-07 01:29:21,762 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:21,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008416396] [2019-11-07 01:29:21,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:21,780 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:21,780 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650354104] [2019-11-07 01:29:21,780 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 01:29:21,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:29:21,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:21,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:29:21,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:21,885 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 01:29:21,885 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:21,912 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 01:29:21,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008416396] [2019-11-07 01:29:21,913 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:21,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650354104] [2019-11-07 01:29:21,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480878919] [2019-11-07 01:29:21,915 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:21,915 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:21,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:21,916 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:21,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:21,943 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:22,671 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2019-11-07 01:29:22,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:22,682 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:23,034 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-11-07 01:29:25,377 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:25,378 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-11-07 01:29:25,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081681534] [2019-11-07 01:29:25,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:29:25,380 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:29:25,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=388, Unknown=1, NotChecked=0, Total=462 [2019-11-07 01:29:25,381 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 22 states. [2019-11-07 01:29:25,643 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-11-07 01:29:26,009 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-11-07 01:29:26,331 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2019-11-07 01:29:26,667 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-11-07 01:29:26,965 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-11-07 01:29:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:40,245 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2019-11-07 01:29:40,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:29:40,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-11-07 01:29:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:40,249 INFO L225 Difference]: With dead ends: 206 [2019-11-07 01:29:40,250 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 01:29:40,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=269, Invalid=1061, Unknown=2, NotChecked=0, Total=1332 [2019-11-07 01:29:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 01:29:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2019-11-07 01:29:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-07 01:29:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2019-11-07 01:29:40,279 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 37 [2019-11-07 01:29:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:40,279 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2019-11-07 01:29:40,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 01:29:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2019-11-07 01:29:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:29:40,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:40,282 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 01:29:40,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:40,488 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1587394043, now seen corresponding path program 3 times [2019-11-07 01:29:40,489 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:40,490 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199655713] [2019-11-07 01:29:40,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:40,503 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:40,504 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927069983] [2019-11-07 01:29:40,504 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