java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:32,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:32,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:32,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:36:32,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:36:32,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:36:32,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:36:32,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:36:32,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:36:32,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:36:32,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:36:32,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:36:32,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:32,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:32,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:32,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:32,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:32,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:32,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:32,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:32,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:32,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:32,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:32,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:32,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:36:32,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:32,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:32,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:32,261 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 01:36:32,275 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:32,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:32,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:32,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:32,277 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:32,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:32,278 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:32,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:32,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:32,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:32,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:32,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:32,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:32,279 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:32,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:32,279 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:32,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:32,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:32,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:32,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:32,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:32,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:32,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:32,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:32,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:32,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:32,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:32,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:32,282 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 01:36:32,569 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:32,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:32,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:32,587 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:32,588 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:32,588 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-10-15 01:36:32,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57f28e67c/c2fd015795334f4ea0c3abc918268123/FLAGd884bca79 [2019-10-15 01:36:33,112 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:33,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-10-15 01:36:33,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57f28e67c/c2fd015795334f4ea0c3abc918268123/FLAGd884bca79 [2019-10-15 01:36:33,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57f28e67c/c2fd015795334f4ea0c3abc918268123 [2019-10-15 01:36:33,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:33,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:33,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:33,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:33,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:33,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33, skipping insertion in model container [2019-10-15 01:36:33,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,529 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:33,549 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:33,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:33,754 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:33,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:33,880 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:33,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33 WrapperNode [2019-10-15 01:36:33,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:33,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:33,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:33,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:33,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (1/1) ... [2019-10-15 01:36:33,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:33,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:33,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:33,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:33,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (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 01:36:34,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:34,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:34,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:34,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:36:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:36:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:34,401 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:34,402 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:36:34,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:34 BoogieIcfgContainer [2019-10-15 01:36:34,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:34,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:34,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:34,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:34,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:33" (1/3) ... [2019-10-15 01:36:34,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71624cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:34, skipping insertion in model container [2019-10-15 01:36:34,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:33" (2/3) ... [2019-10-15 01:36:34,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71624cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:34, skipping insertion in model container [2019-10-15 01:36:34,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:34" (3/3) ... [2019-10-15 01:36:34,412 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2019-10-15 01:36:34,425 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:34,431 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:34,445 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:34,479 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:34,479 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:34,479 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:34,479 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:34,479 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:34,480 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:34,480 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:34,480 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:36:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:36:34,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:34,501 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:34,503 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash 357994483, now seen corresponding path program 1 times [2019-10-15 01:36:34,516 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:34,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237406745] [2019-10-15 01:36:34,517 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,517 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:34,615 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:34,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970711725] [2019-10-15 01:36:34,616 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 01:36:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:34,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:34,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:34,763 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 01:36:34,764 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:34,804 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 01:36:34,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237406745] [2019-10-15 01:36:34,805 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:34,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970711725] [2019-10-15 01:36:34,806 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:34,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:36:34,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384930803] [2019-10-15 01:36:34,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:36:34,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:34,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:36:34,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:36:34,832 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-15 01:36:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:34,921 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:36:34,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:36:34,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:36:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:34,933 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:36:34,933 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:36:34,938 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 01:36:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:36:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:36:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:36:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-15 01:36:34,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-10-15 01:36:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:34,989 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-15 01:36:34,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:36:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-15 01:36:34,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:36:34,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:34,991 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:35,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:35,200 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash -964628371, now seen corresponding path program 1 times [2019-10-15 01:36:35,201 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:35,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503041430] [2019-10-15 01:36:35,201 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:35,202 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:35,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:35,230 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:35,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107286111] [2019-10-15 01:36:35,231 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 01:36:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:35,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:35,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:35,316 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 01:36:35,317 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:35,345 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 01:36:35,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503041430] [2019-10-15 01:36:35,346 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:35,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107286111] [2019-10-15 01:36:35,347 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:35,347 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:36:35,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636488037] [2019-10-15 01:36:35,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:36:35,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:35,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:36:35,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:36:35,350 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-10-15 01:36:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:35,494 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2019-10-15 01:36:35,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:36:35,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-15 01:36:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:35,499 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:36:35,500 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:36:35,501 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 01:36:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:36:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-10-15 01:36:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:36:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-10-15 01:36:35,544 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2019-10-15 01:36:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:35,545 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-10-15 01:36:35,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:36:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-10-15 01:36:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:36:35,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:35,548 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:35,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:35,749 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:35,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1384779757, now seen corresponding path program 1 times [2019-10-15 01:36:35,750 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:35,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800798207] [2019-10-15 01:36:35,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:35,751 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:35,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:35,760 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:35,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038405070] [2019-10-15 01:36:35,761 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 01:36:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:35,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:35,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:35,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:35,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800798207] [2019-10-15 01:36:35,931 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:35,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038405070] [2019-10-15 01:36:35,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404482803] [2019-10-15 01:36:35,962 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:36:35,962 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:35,976 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:35,985 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:35,986 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:36,223 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:36,905 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:36,917 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:36,923 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:37,290 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:36:37,388 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:37,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-10-15 01:36:37,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247249988] [2019-10-15 01:36:37,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:36:37,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:36:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:36:37,393 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2019-10-15 01:36:37,639 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-10-15 01:36:37,870 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-10-15 01:36:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:38,058 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2019-10-15 01:36:38,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:36:38,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-10-15 01:36:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:38,060 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:36:38,060 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:36:38,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:36:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-10-15 01:36:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:36:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-10-15 01:36:38,070 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2019-10-15 01:36:38,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:38,070 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-10-15 01:36:38,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:36:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-10-15 01:36:38,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:36:38,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:38,072 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:38,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:38,277 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:38,277 INFO L82 PathProgramCache]: Analyzing trace with hash -843921470, now seen corresponding path program 1 times [2019-10-15 01:36:38,278 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:38,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809325112] [2019-10-15 01:36:38,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:38,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:38,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:38,287 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:38,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124399997] [2019-10-15 01:36:38,287 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 01:36:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:38,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:38,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:36:38,406 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:36:38,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809325112] [2019-10-15 01:36:38,445 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:38,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124399997] [2019-10-15 01:36:38,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33296914] [2019-10-15 01:36:38,447 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:38,447 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:38,448 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:38,448 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:38,448 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:38,496 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:39,071 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:39,076 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:39,081 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:39,324 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:36:39,544 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:39,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6] total 20 [2019-10-15 01:36:39,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154855509] [2019-10-15 01:36:39,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 01:36:39,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 01:36:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:36:39,550 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 12 states. [2019-10-15 01:36:39,824 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2019-10-15 01:36:40,010 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-10-15 01:36:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:40,389 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-10-15 01:36:40,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 01:36:40,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-10-15 01:36:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:40,390 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:36:40,390 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:36:40,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:36:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:36:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-10-15 01:36:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-15 01:36:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-10-15 01:36:40,403 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 23 [2019-10-15 01:36:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:40,404 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-10-15 01:36:40,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 01:36:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-10-15 01:36:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:36:40,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:40,405 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:40,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:40,610 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1976738209, now seen corresponding path program 1 times [2019-10-15 01:36:40,611 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:40,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943189611] [2019-10-15 01:36:40,612 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:40,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:40,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:40,622 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:40,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114530798] [2019-10-15 01:36:40,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:40,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:40,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:36:40,764 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:36:40,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943189611] [2019-10-15 01:36:40,816 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:40,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114530798] [2019-10-15 01:36:40,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138177601] [2019-10-15 01:36:40,818 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:40,819 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:40,819 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:40,819 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:40,820 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:40,847 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:41,306 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:41,315 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:41,320 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:41,659 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:36:41,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:41,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 24 [2019-10-15 01:36:41,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755859567] [2019-10-15 01:36:41,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:36:41,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:36:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:41,977 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 24 states. [2019-10-15 01:36:42,314 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-10-15 01:36:42,800 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-10-15 01:36:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:44,316 INFO L93 Difference]: Finished difference Result 112 states and 164 transitions. [2019-10-15 01:36:44,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:36:44,317 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2019-10-15 01:36:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:44,319 INFO L225 Difference]: With dead ends: 112 [2019-10-15 01:36:44,319 INFO L226 Difference]: Without dead ends: 90 [2019-10-15 01:36:44,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=475, Invalid=1687, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:36:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-15 01:36:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 39. [2019-10-15 01:36:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:36:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-15 01:36:44,335 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 24 [2019-10-15 01:36:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:44,336 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-15 01:36:44,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:36:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-15 01:36:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:36:44,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:44,337 INFO L380 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:44,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:44,551 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash -743084193, now seen corresponding path program 2 times [2019-10-15 01:36:44,552 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:44,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776115775] [2019-10-15 01:36:44,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:44,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:44,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:44,573 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:44,575 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903502248] [2019-10-15 01:36:44,575 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:44,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:36:44,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:44,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:36:44,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-15 01:36:44,724 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-15 01:36:44,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776115775] [2019-10-15 01:36:44,759 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:44,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903502248] [2019-10-15 01:36:44,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1073244926] [2019-10-15 01:36:44,761 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:44,762 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:44,763 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:44,763 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:44,764 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:44,791 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:45,155 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:45,163 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:45,166 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:45,466 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:36:45,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:45,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-10-15 01:36:45,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701967542] [2019-10-15 01:36:45,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:36:45,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:36:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:36:45,741 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 22 states. [2019-10-15 01:36:45,966 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2019-10-15 01:36:46,236 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:36:46,489 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:36:47,106 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:36:47,684 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-10-15 01:36:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:47,926 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2019-10-15 01:36:47,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:36:47,926 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 01:36:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:47,929 INFO L225 Difference]: With dead ends: 108 [2019-10-15 01:36:47,929 INFO L226 Difference]: Without dead ends: 96 [2019-10-15 01:36:47,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 01:36:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-15 01:36:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 51. [2019-10-15 01:36:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-15 01:36:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2019-10-15 01:36:47,945 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 32 [2019-10-15 01:36:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:47,945 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2019-10-15 01:36:47,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:36:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2019-10-15 01:36:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:36:47,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:47,947 INFO L380 BasicCegarLoop]: trace histogram [12, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:48,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:48,156 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1700125282, now seen corresponding path program 3 times [2019-10-15 01:36:48,157 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:48,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247136872] [2019-10-15 01:36:48,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:48,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:48,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:48,164 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:48,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329511871] [2019-10-15 01:36:48,165 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:48,245 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:48,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:48,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:36:48,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-15 01:36:48,286 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-15 01:36:48,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247136872] [2019-10-15 01:36:48,311 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:48,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329511871] [2019-10-15 01:36:48,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465276600] [2019-10-15 01:36:48,313 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:48,313 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:48,314 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:48,314 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:48,315 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:48,338 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:48,648 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:48,654 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:48,657 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:48,953 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:36:49,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:49,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 19 [2019-10-15 01:36:49,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323914615] [2019-10-15 01:36:49,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:36:49,214 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:49,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:36:49,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:36:49,215 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 19 states. [2019-10-15 01:36:49,441 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-10-15 01:36:49,718 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-10-15 01:36:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:50,371 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2019-10-15 01:36:50,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:36:50,372 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2019-10-15 01:36:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:50,373 INFO L225 Difference]: With dead ends: 83 [2019-10-15 01:36:50,374 INFO L226 Difference]: Without dead ends: 58 [2019-10-15 01:36:50,374 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:36:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-15 01:36:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2019-10-15 01:36:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-15 01:36:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2019-10-15 01:36:50,394 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 38 [2019-10-15 01:36:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:50,395 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2019-10-15 01:36:50,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:36:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2019-10-15 01:36:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-15 01:36:50,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:50,397 INFO L380 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:50,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:50,604 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1043215469, now seen corresponding path program 4 times [2019-10-15 01:36:50,605 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:50,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17507547] [2019-10-15 01:36:50,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:50,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:50,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:50,616 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:50,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065985409] [2019-10-15 01:36:50,616 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:50,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:36:50,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:36:50,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:36:50,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17507547] [2019-10-15 01:36:50,917 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:50,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065985409] [2019-10-15 01:36:50,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522344763] [2019-10-15 01:36:50,919 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:50,919 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:50,920 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:50,920 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:50,920 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:50,938 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:51,237 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:51,246 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:51,249 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:51,534 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:36:51,781 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:51,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 32 [2019-10-15 01:36:51,782 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293031045] [2019-10-15 01:36:51,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:36:51,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:51,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:36:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:36:51,784 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 32 states. [2019-10-15 01:36:52,064 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-10-15 01:36:52,879 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-10-15 01:36:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:55,342 INFO L93 Difference]: Finished difference Result 263 states and 388 transitions. [2019-10-15 01:36:55,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-15 01:36:55,342 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2019-10-15 01:36:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:55,344 INFO L225 Difference]: With dead ends: 263 [2019-10-15 01:36:55,344 INFO L226 Difference]: Without dead ends: 230 [2019-10-15 01:36:55,346 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1164, Invalid=3666, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:36:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-10-15 01:36:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 62. [2019-10-15 01:36:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-15 01:36:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2019-10-15 01:36:55,367 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 41 [2019-10-15 01:36:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:55,367 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2019-10-15 01:36:55,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:36:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2019-10-15 01:36:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:36:55,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:55,369 INFO L380 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:55,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:55,572 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash -269381011, now seen corresponding path program 5 times [2019-10-15 01:36:55,573 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:55,574 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532366899] [2019-10-15 01:36:55,574 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:55,574 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:55,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:55,581 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:55,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95410486] [2019-10-15 01:36:55,581 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:55,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:36:55,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:55,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:36:55,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-10-15 01:36:55,731 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-10-15 01:36:55,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532366899] [2019-10-15 01:36:55,762 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:55,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95410486] [2019-10-15 01:36:55,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920256926] [2019-10-15 01:36:55,766 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:55,766 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:55,766 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:55,767 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:55,767 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:55,793 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:56,074 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:56,079 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:56,081 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:56,355 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:36:56,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:56,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-10-15 01:36:56,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317546034] [2019-10-15 01:36:56,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:36:56,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:56,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:36:56,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:36:56,631 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 22 states. [2019-10-15 01:36:56,846 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-10-15 01:36:57,176 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-10-15 01:36:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:57,883 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2019-10-15 01:36:57,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:36:57,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2019-10-15 01:36:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:57,886 INFO L225 Difference]: With dead ends: 114 [2019-10-15 01:36:57,886 INFO L226 Difference]: Without dead ends: 93 [2019-10-15 01:36:57,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:36:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-15 01:36:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2019-10-15 01:36:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-15 01:36:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2019-10-15 01:36:57,909 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 57 [2019-10-15 01:36:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:57,909 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2019-10-15 01:36:57,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:36:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2019-10-15 01:36:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-15 01:36:57,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:57,912 INFO L380 BasicCegarLoop]: trace histogram [28, 16, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:58,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:58,115 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1266040127, now seen corresponding path program 6 times [2019-10-15 01:36:58,116 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:58,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914271719] [2019-10-15 01:36:58,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:58,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:58,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:58,124 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:58,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213709155] [2019-10-15 01:36:58,125 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:03,640 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:03,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:03,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-15 01:37:03,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:04,204 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 82 [2019-10-15 01:37:04,691 WARN L191 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 101 [2019-10-15 01:37:05,360 WARN L191 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 123 [2019-10-15 01:37:05,491 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 60 [2019-10-15 01:37:06,223 WARN L191 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 145 [2019-10-15 01:37:06,377 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 62 [2019-10-15 01:37:08,206 WARN L191 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 369 DAG size of output: 273 [2019-10-15 01:37:08,649 WARN L191 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 75 [2019-10-15 01:37:11,016 WARN L191 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 449 DAG size of output: 312 [2019-10-15 01:37:11,528 WARN L191 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 80 [2019-10-15 01:37:14,352 WARN L191 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 537 DAG size of output: 351 [2019-10-15 01:37:14,965 WARN L191 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 87