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/init-non-constant-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:14,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:14,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:14,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:14,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:14,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:14,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:14,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:14,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:14,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:14,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:14,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:14,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:14,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:14,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:14,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:14,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:14,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:14,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:14,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:14,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:14,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:14,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:14,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:14,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:37:14,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:14,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:14,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:14,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:37:14,193 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:14,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:14,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:14,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:14,195 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:14,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:14,196 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:14,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:14,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:14,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:14,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:14,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:14,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:14,197 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:14,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:14,198 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:14,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:14,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:14,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:14,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:14,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:14,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:14,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:14,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:14,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:14,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:14,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:14,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:14,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:37:14,470 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:14,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:14,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:14,489 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:14,489 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:14,490 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-10-15 01:37:14,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779e25dc3/4377cb09a85f43b798fbe989b6df0648/FLAG7785c2ebd [2019-10-15 01:37:15,018 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:15,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-10-15 01:37:15,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779e25dc3/4377cb09a85f43b798fbe989b6df0648/FLAG7785c2ebd [2019-10-15 01:37:15,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779e25dc3/4377cb09a85f43b798fbe989b6df0648 [2019-10-15 01:37:15,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:15,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:15,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:15,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:15,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:15,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a8eca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15, skipping insertion in model container [2019-10-15 01:37:15,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,435 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:15,453 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:15,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:15,665 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:15,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:15,806 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:15,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15 WrapperNode [2019-10-15 01:37:15,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:15,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:15,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:15,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:15,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:15,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:15,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:15,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:15,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:15,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:15,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:15,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:15,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 01:37:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:16,293 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:16,294 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:37:16,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:16 BoogieIcfgContainer [2019-10-15 01:37:16,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:16,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:16,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:16,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:16,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:15" (1/3) ... [2019-10-15 01:37:16,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36095c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:16, skipping insertion in model container [2019-10-15 01:37:16,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (2/3) ... [2019-10-15 01:37:16,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36095c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:16, skipping insertion in model container [2019-10-15 01:37:16,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:16" (3/3) ... [2019-10-15 01:37:16,309 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2019-10-15 01:37:16,318 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:16,326 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:16,336 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:16,360 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:16,360 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:16,361 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:16,361 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:16,361 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:16,361 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:16,361 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:16,361 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:37:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:37:16,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:16,385 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:16,387 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash 304177849, now seen corresponding path program 1 times [2019-10-15 01:37:16,399 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:16,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066641428] [2019-10-15 01:37:16,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:16,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:16,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:16,474 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:16,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792739285] [2019-10-15 01:37:16,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:16,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:16,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:16,591 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:16,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066641428] [2019-10-15 01:37:16,629 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:16,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792739285] [2019-10-15 01:37:16,632 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:16,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:37:16,633 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123347618] [2019-10-15 01:37:16,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:37:16,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:37:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:16,658 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-15 01:37:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:16,759 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:37:16,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:37:16,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:37:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:16,771 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:37:16,771 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 01:37:16,775 INFO L600 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 [2019-10-15 01:37:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 01:37:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-15 01:37:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:37:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-10-15 01:37:16,815 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2019-10-15 01:37:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:16,816 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-10-15 01:37:16,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:37:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-10-15 01:37:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:37:16,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:16,817 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:17,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,019 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash 362677943, now seen corresponding path program 1 times [2019-10-15 01:37:17,021 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:17,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400668840] [2019-10-15 01:37:17,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:17,041 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:17,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12496849] [2019-10-15 01:37:17,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:17,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:17,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:17,125 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:17,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400668840] [2019-10-15 01:37:17,148 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:17,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12496849] [2019-10-15 01:37:17,148 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:17,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:17,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789377436] [2019-10-15 01:37:17,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:17,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:17,152 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 6 states. [2019-10-15 01:37:17,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:17,256 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2019-10-15 01:37:17,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:17,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-15 01:37:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:17,260 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:37:17,260 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:37:17,261 INFO L600 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 [2019-10-15 01:37:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:37:17,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-15 01:37:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:37:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2019-10-15 01:37:17,276 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2019-10-15 01:37:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:17,276 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2019-10-15 01:37:17,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2019-10-15 01:37:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:37:17,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:17,278 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:17,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,483 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash 421607751, now seen corresponding path program 1 times [2019-10-15 01:37:17,484 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:17,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553675357] [2019-10-15 01:37:17,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:17,496 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:17,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872462145] [2019-10-15 01:37:17,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:17,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:17,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:17,596 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:17,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553675357] [2019-10-15 01:37:17,631 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:17,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872462145] [2019-10-15 01:37:17,632 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:17,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:17,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495944404] [2019-10-15 01:37:17,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:17,633 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:17,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:17,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:17,634 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 6 states. [2019-10-15 01:37:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:17,739 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2019-10-15 01:37:17,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:17,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-15 01:37:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:17,742 INFO L225 Difference]: With dead ends: 77 [2019-10-15 01:37:17,742 INFO L226 Difference]: Without dead ends: 51 [2019-10-15 01:37:17,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-15 01:37:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-10-15 01:37:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:37:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2019-10-15 01:37:17,766 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 25 [2019-10-15 01:37:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:17,766 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2019-10-15 01:37:17,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2019-10-15 01:37:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:37:17,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:17,768 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:17,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,973 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2016507335, now seen corresponding path program 1 times [2019-10-15 01:37:17,974 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:17,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306837581] [2019-10-15 01:37:17,975 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,975 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:17,988 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:17,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839473292] [2019-10-15 01:37:17,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:18,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:18,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:37:18,100 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:37:18,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306837581] [2019-10-15 01:37:18,157 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:18,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839473292] [2019-10-15 01:37:18,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587721696] [2019-10-15 01:37:18,194 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:18,195 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:18,205 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:18,222 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:18,223 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:18,487 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:20,542 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 01:37:20,554 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:20,558 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:21,010 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-10-15 01:37:21,341 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:21,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 22 [2019-10-15 01:37:21,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148115648] [2019-10-15 01:37:21,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:37:21,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:21,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:37:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:37:21,345 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 22 states. [2019-10-15 01:37:22,860 WARN L191 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2019-10-15 01:37:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:23,188 INFO L93 Difference]: Finished difference Result 135 states and 193 transitions. [2019-10-15 01:37:23,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:37:23,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2019-10-15 01:37:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:23,191 INFO L225 Difference]: With dead ends: 135 [2019-10-15 01:37:23,192 INFO L226 Difference]: Without dead ends: 95 [2019-10-15 01:37:23,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=326, Invalid=1080, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:37:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-15 01:37:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2019-10-15 01:37:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-15 01:37:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2019-10-15 01:37:23,219 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 33 [2019-10-15 01:37:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:23,219 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2019-10-15 01:37:23,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:37:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2019-10-15 01:37:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:37:23,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:23,221 INFO L380 BasicCegarLoop]: trace histogram [24, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:23,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:23,435 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:23,435 INFO L82 PathProgramCache]: Analyzing trace with hash -130175289, now seen corresponding path program 2 times [2019-10-15 01:37:23,436 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:23,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404927694] [2019-10-15 01:37:23,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:23,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:23,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:23,449 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:23,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606193767] [2019-10-15 01:37:23,449 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 [2019-10-15 01:37:23,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-15 01:37:23,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:23,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:37:23,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-10-15 01:37:23,910 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-10-15 01:37:24,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404927694] [2019-10-15 01:37:24,011 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:24,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606193767] [2019-10-15 01:37:24,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719419163] [2019-10-15 01:37:24,013 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:24,013 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:24,014 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:24,014 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:24,014 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:24,052 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:25,354 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 01:37:25,368 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:25,371 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:25,763 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-10-15 01:37:26,104 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:26,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 30 [2019-10-15 01:37:26,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020614356] [2019-10-15 01:37:26,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-15 01:37:26,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:26,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-15 01:37:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:37:26,110 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 30 states. [2019-10-15 01:37:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:28,534 INFO L93 Difference]: Finished difference Result 251 states and 357 transitions. [2019-10-15 01:37:28,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 01:37:28,535 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2019-10-15 01:37:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:28,538 INFO L225 Difference]: With dead ends: 251 [2019-10-15 01:37:28,538 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:37:28,540 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2019-10-15 01:37:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:37:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2019-10-15 01:37:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-10-15 01:37:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 207 transitions. [2019-10-15 01:37:28,570 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 207 transitions. Word has length 49 [2019-10-15 01:37:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:28,571 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 207 transitions. [2019-10-15 01:37:28,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-15 01:37:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 207 transitions. [2019-10-15 01:37:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-15 01:37:28,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:28,573 INFO L380 BasicCegarLoop]: trace histogram [56, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:28,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:28,779 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1937432377, now seen corresponding path program 3 times [2019-10-15 01:37:28,780 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:28,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291740363] [2019-10-15 01:37:28,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:28,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:28,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:28,794 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:28,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291845898] [2019-10-15 01:37:28,794 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 [2019-10-15 01:37:28,905 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:28,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:28,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 01:37:28,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-15 01:37:29,124 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-15 01:37:29,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291740363] [2019-10-15 01:37:29,388 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:29,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291845898] [2019-10-15 01:37:29,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154715751] [2019-10-15 01:37:29,390 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:29,391 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:29,391 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:29,391 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:29,392 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:29,421 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:30,520 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 01:37:30,526 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:30,529 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:31,072 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-10-15 01:37:31,512 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:31,512 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 12] total 50 [2019-10-15 01:37:31,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355001953] [2019-10-15 01:37:31,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-15 01:37:31,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-15 01:37:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1872, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:37:31,516 INFO L87 Difference]: Start difference. First operand 170 states and 207 transitions. Second operand 50 states. [2019-10-15 01:37:35,504 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2019-10-15 01:37:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:37,874 INFO L93 Difference]: Finished difference Result 686 states and 858 transitions. [2019-10-15 01:37:37,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-15 01:37:37,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 81 [2019-10-15 01:37:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:37,879 INFO L225 Difference]: With dead ends: 686 [2019-10-15 01:37:37,879 INFO L226 Difference]: Without dead ends: 555 [2019-10-15 01:37:37,884 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2688, Invalid=8024, Unknown=0, NotChecked=0, Total=10712 [2019-10-15 01:37:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2019-10-15 01:37:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 550. [2019-10-15 01:37:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2019-10-15 01:37:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 672 transitions. [2019-10-15 01:37:37,965 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 672 transitions. Word has length 81 [2019-10-15 01:37:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:37,966 INFO L462 AbstractCegarLoop]: Abstraction has 550 states and 672 transitions. [2019-10-15 01:37:37,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-15 01:37:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 672 transitions. [2019-10-15 01:37:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-10-15 01:37:37,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:37,971 INFO L380 BasicCegarLoop]: trace histogram [196, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:38,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:38,178 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1331474927, now seen corresponding path program 4 times [2019-10-15 01:37:38,179 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:38,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120152576] [2019-10-15 01:37:38,179 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:38,179 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:38,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:38,205 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:38,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786438145] [2019-10-15 01:37:38,205 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:38,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:37:38,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22068 backedges. 2942 proven. 105 refuted. 0 times theorem prover too weak. 19021 trivial. 0 not checked. [2019-10-15 01:37:38,729 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22068 backedges. 2942 proven. 105 refuted. 0 times theorem prover too weak. 19021 trivial. 0 not checked. [2019-10-15 01:37:39,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120152576] [2019-10-15 01:37:39,101 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:39,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786438145] [2019-10-15 01:37:39,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914882336] [2019-10-15 01:37:39,105 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:39,105 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:39,105 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:39,106 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:39,106 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:39,124 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:40,125 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 01:37:40,132 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:40,136 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:40,563 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-10-15 01:37:40,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:40,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 46 [2019-10-15 01:37:40,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584853552] [2019-10-15 01:37:40,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-15 01:37:40,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:40,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-15 01:37:40,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=1429, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:37:40,917 INFO L87 Difference]: Start difference. First operand 550 states and 672 transitions. Second operand 46 states. [2019-10-15 01:37:43,642 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2019-10-15 01:37:44,619 WARN L191 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2019-10-15 01:37:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:45,745 INFO L93 Difference]: Finished difference Result 1643 states and 2335 transitions. [2019-10-15 01:37:45,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-15 01:37:45,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 241 [2019-10-15 01:37:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:45,763 INFO L225 Difference]: With dead ends: 1643 [2019-10-15 01:37:45,763 INFO L226 Difference]: Without dead ends: 1115 [2019-10-15 01:37:45,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 676 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2090, Invalid=5220, Unknown=0, NotChecked=0, Total=7310 [2019-10-15 01:37:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2019-10-15 01:37:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1110. [2019-10-15 01:37:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1110 states. [2019-10-15 01:37:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1344 transitions. [2019-10-15 01:37:45,957 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1344 transitions. Word has length 241 [2019-10-15 01:37:45,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:45,957 INFO L462 AbstractCegarLoop]: Abstraction has 1110 states and 1344 transitions. [2019-10-15 01:37:45,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-15 01:37:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1344 transitions. [2019-10-15 01:37:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2019-10-15 01:37:45,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:45,975 INFO L380 BasicCegarLoop]: trace histogram [420, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:46,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:46,180 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash -148070417, now seen corresponding path program 5 times [2019-10-15 01:37:46,181 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:46,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825991000] [2019-10-15 01:37:46,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:46,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:46,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:46,207 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:46,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595284385] [2019-10-15 01:37:46,208 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true