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 -i ../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 00:10:21,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 00:10:21,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 00:10:21,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 00:10:21,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 00:10:21,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 00:10:21,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 00:10:21,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 00:10:21,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 00:10:21,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 00:10:21,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 00:10:21,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 00:10:21,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 00:10:21,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 00:10:21,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 00:10:21,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 00:10:21,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 00:10:21,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 00:10:21,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 00:10:21,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 00:10:21,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 00:10:21,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 00:10:21,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 00:10:21,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 00:10:21,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 00:10:21,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 00:10:21,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 00:10:21,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 00:10:21,258 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 [2019-10-02 00:10:21,272 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 00:10:21,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 00:10:21,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 00:10:21,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 00:10:21,274 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 00:10:21,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 00:10:21,274 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 00:10:21,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 00:10:21,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 00:10:21,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 00:10:21,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 00:10:21,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 00:10:21,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 00:10:21,276 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 00:10:21,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 00:10:21,276 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 00:10:21,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 00:10:21,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 00:10:21,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 00:10:21,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 00:10:21,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 00:10:21,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 00:10:21,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 00:10:21,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 00:10:21,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 00:10:21,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 00:10:21,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 00:10:21,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 00:10:21,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 00:10:21,306 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 00:10:21,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 00:10:21,321 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 00:10:21,322 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 00:10:21,323 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 00:10:21,324 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-10-02 00:10:21,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b988bee0e/bc812e84f2494348a2476727c070abad/FLAGc837cf3f3 [2019-10-02 00:10:21,821 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 00:10:21,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-10-02 00:10:21,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b988bee0e/bc812e84f2494348a2476727c070abad/FLAGc837cf3f3 [2019-10-02 00:10:22,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b988bee0e/bc812e84f2494348a2476727c070abad [2019-10-02 00:10:22,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 00:10:22,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 00:10:22,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 00:10:22,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 00:10:22,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 00:10:22,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,218 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 02.10 12:10:22, skipping insertion in model container [2019-10-02 00:10:22,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,225 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 00:10:22,239 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 00:10:22,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:10:22,406 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 00:10:22,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:10:22,539 INFO L192 MainTranslator]: Completed translation [2019-10-02 00:10:22,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22 WrapperNode [2019-10-02 00:10:22,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 00:10:22,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 00:10:22,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 00:10:22,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 00:10:22,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (1/1) ... [2019-10-02 00:10:22,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 00:10:22,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 00:10:22,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 00:10:22,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 00:10:22,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (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 [2019-10-02 00:10:22,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 00:10:22,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 00:10:22,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 00:10:22,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 00:10:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 00:10:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 00:10:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 00:10:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 00:10:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 00:10:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 00:10:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 00:10:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 00:10:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 00:10:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 00:10:22,970 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 00:10:22,970 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-02 00:10:22,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:10:22 BoogieIcfgContainer [2019-10-02 00:10:22,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 00:10:22,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 00:10:22,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 00:10:22,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 00:10:22,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 12:10:22" (1/3) ... [2019-10-02 00:10:22,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a039d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:10:22, skipping insertion in model container [2019-10-02 00:10:22,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:10:22" (2/3) ... [2019-10-02 00:10:22,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a039d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:10:22, skipping insertion in model container [2019-10-02 00:10:22,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:10:22" (3/3) ... [2019-10-02 00:10:22,979 INFO L109 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2019-10-02 00:10:22,988 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 00:10:22,995 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 00:10:23,011 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 00:10:23,041 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 00:10:23,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 00:10:23,042 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 00:10:23,042 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 00:10:23,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 00:10:23,042 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 00:10:23,043 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 00:10:23,043 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 00:10:23,043 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 00:10:23,059 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-02 00:10:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-02 00:10:23,065 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:23,065 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:23,067 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:23,072 INFO L82 PathProgramCache]: Analyzing trace with hash 659715076, now seen corresponding path program 1 times [2019-10-02 00:10:23,073 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:23,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:23,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:23,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:23,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:23,155 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:23,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:23,156 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 00:10:23,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:10:23,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:10:23,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:10:23,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:10:23,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 00:10:23,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 00:10:23,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 00:10:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 00:10:23,296 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-02 00:10:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:23,385 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2019-10-02 00:10:23,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 00:10:23,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-02 00:10:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:23,395 INFO L225 Difference]: With dead ends: 61 [2019-10-02 00:10:23,396 INFO L226 Difference]: Without dead ends: 30 [2019-10-02 00:10:23,399 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 00:10:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-02 00:10:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-02 00:10:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-02 00:10:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-02 00:10:23,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-10-02 00:10:23,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:23,449 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-02 00:10:23,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 00:10:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-02 00:10:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 00:10:23,451 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:23,451 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:23,452 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash -528988062, now seen corresponding path program 1 times [2019-10-02 00:10:23,454 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:23,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:23,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:23,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:23,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:23,477 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:23,477 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:23,478 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 00:10:23,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:10:23,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:10:23,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:10:23,560 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:10:23,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 00:10:23,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:10:23,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:10:23,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:10:23,565 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-10-02 00:10:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:23,645 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2019-10-02 00:10:23,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:10:23,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-02 00:10:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:23,648 INFO L225 Difference]: With dead ends: 59 [2019-10-02 00:10:23,648 INFO L226 Difference]: Without dead ends: 38 [2019-10-02 00:10:23,649 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:10:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-02 00:10:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-10-02 00:10:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-02 00:10:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-02 00:10:23,661 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2019-10-02 00:10:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:23,661 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-02 00:10:23,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:10:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-02 00:10:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-02 00:10:23,663 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:23,663 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:23,663 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:23,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash -306641421, now seen corresponding path program 1 times [2019-10-02 00:10:23,664 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:23,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:23,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:23,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:23,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:23,672 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:23,672 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:23,673 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 00:10:23,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:10:23,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 00:10:23,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:10:23,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:23,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 00:10:23,766 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 00:10:23,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 00:10:23,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 00:10:23,767 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2019-10-02 00:10:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:23,867 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2019-10-02 00:10:23,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 00:10:23,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-02 00:10:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:23,869 INFO L225 Difference]: With dead ends: 69 [2019-10-02 00:10:23,869 INFO L226 Difference]: Without dead ends: 45 [2019-10-02 00:10:23,870 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 00:10:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-02 00:10:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-10-02 00:10:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-02 00:10:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-02 00:10:23,879 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 20 [2019-10-02 00:10:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:23,880 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-02 00:10:23,880 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 00:10:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-02 00:10:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-02 00:10:23,881 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:23,881 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:23,882 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2003830142, now seen corresponding path program 2 times [2019-10-02 00:10:23,883 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:23,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:23,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:23,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:23,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:23,891 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:23,891 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:23,891 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 00:10:23,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 00:10:23,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-02 00:10:23,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:23,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:10:23,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 00:10:23,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:10:23,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 00:10:23,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:10:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:10:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:10:23,972 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2019-10-02 00:10:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:24,043 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-10-02 00:10:24,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:10:24,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-02 00:10:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:24,044 INFO L225 Difference]: With dead ends: 76 [2019-10-02 00:10:24,045 INFO L226 Difference]: Without dead ends: 60 [2019-10-02 00:10:24,045 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:10:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-02 00:10:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-10-02 00:10:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-02 00:10:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-02 00:10:24,055 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2019-10-02 00:10:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:24,055 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-02 00:10:24,055 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:10:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-02 00:10:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-02 00:10:24,056 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:24,057 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:24,057 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash -851590433, now seen corresponding path program 1 times [2019-10-02 00:10:24,057 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:24,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:24,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:24,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:24,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:24,065 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:24,066 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:24,066 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 00:10:24,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:10:24,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 00:10:24,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-02 00:10:24,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:24,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 00:10:24,183 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 00:10:24,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 00:10:24,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:10:24,185 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2019-10-02 00:10:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:24,294 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2019-10-02 00:10:24,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 00:10:24,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-02 00:10:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:24,296 INFO L225 Difference]: With dead ends: 83 [2019-10-02 00:10:24,296 INFO L226 Difference]: Without dead ends: 51 [2019-10-02 00:10:24,297 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:10:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-02 00:10:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2019-10-02 00:10:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-02 00:10:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-10-02 00:10:24,306 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2019-10-02 00:10:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:24,306 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-10-02 00:10:24,306 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 00:10:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-10-02 00:10:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 00:10:24,310 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:24,311 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:24,311 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:24,311 INFO L82 PathProgramCache]: Analyzing trace with hash -241858451, now seen corresponding path program 2 times [2019-10-02 00:10:24,312 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:24,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:24,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:24,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:24,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:24,323 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:24,326 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:24,326 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 00:10:24,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:24,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 00:10:24,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:24,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 00:10:24,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:10:24,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:24,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 00:10:24,449 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 00:10:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 00:10:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 00:10:24,450 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2019-10-02 00:10:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:24,578 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2019-10-02 00:10:24,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 00:10:24,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-10-02 00:10:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:24,579 INFO L225 Difference]: With dead ends: 97 [2019-10-02 00:10:24,580 INFO L226 Difference]: Without dead ends: 58 [2019-10-02 00:10:24,580 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 00:10:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-02 00:10:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-10-02 00:10:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-02 00:10:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-10-02 00:10:24,589 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 34 [2019-10-02 00:10:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:24,590 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-10-02 00:10:24,590 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 00:10:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-10-02 00:10:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-02 00:10:24,591 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:24,591 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:24,592 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash -123740257, now seen corresponding path program 3 times [2019-10-02 00:10:24,592 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:24,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:24,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:24,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:24,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:24,600 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:24,600 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:24,600 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 00:10:24,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:24,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-02 00:10:24,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:24,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 00:10:24,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-02 00:10:24,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:24,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-02 00:10:24,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:10:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:10:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:10:24,688 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 4 states. [2019-10-02 00:10:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:24,751 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2019-10-02 00:10:24,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:10:24,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-02 00:10:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:24,753 INFO L225 Difference]: With dead ends: 105 [2019-10-02 00:10:24,753 INFO L226 Difference]: Without dead ends: 66 [2019-10-02 00:10:24,754 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:10:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-02 00:10:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-10-02 00:10:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-02 00:10:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-10-02 00:10:24,773 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 38 [2019-10-02 00:10:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:24,773 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-10-02 00:10:24,773 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:10:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-10-02 00:10:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-02 00:10:24,780 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:24,780 INFO L411 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:24,781 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:24,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1198106045, now seen corresponding path program 4 times [2019-10-02 00:10:24,781 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:24,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:24,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:24,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:24,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:24,796 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:24,797 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:24,797 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 00:10:24,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:24,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 00:10:24,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:24,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 00:10:24,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-02 00:10:24,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:24,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 00:10:24,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 00:10:24,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 00:10:24,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 00:10:24,950 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 9 states. [2019-10-02 00:10:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:25,172 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2019-10-02 00:10:25,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 00:10:25,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-10-02 00:10:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:25,174 INFO L225 Difference]: With dead ends: 147 [2019-10-02 00:10:25,174 INFO L226 Difference]: Without dead ends: 125 [2019-10-02 00:10:25,175 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-02 00:10:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-02 00:10:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2019-10-02 00:10:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-02 00:10:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2019-10-02 00:10:25,194 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 45 [2019-10-02 00:10:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:25,194 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2019-10-02 00:10:25,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 00:10:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2019-10-02 00:10:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-02 00:10:25,199 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:25,199 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:25,199 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:25,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1312433444, now seen corresponding path program 5 times [2019-10-02 00:10:25,202 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:25,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:25,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:25,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:25,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:25,217 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:25,217 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:25,218 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 00:10:25,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 00:10:26,427 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-02 00:10:26,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:26,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 00:10:26,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:10:26,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:26,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 00:10:26,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 00:10:26,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 00:10:26,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 00:10:26,512 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand 8 states. [2019-10-02 00:10:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:26,616 INFO L93 Difference]: Finished difference Result 156 states and 202 transitions. [2019-10-02 00:10:26,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 00:10:26,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2019-10-02 00:10:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:26,618 INFO L225 Difference]: With dead ends: 156 [2019-10-02 00:10:26,618 INFO L226 Difference]: Without dead ends: 93 [2019-10-02 00:10:26,619 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 00:10:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-02 00:10:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2019-10-02 00:10:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-02 00:10:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2019-10-02 00:10:26,629 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 60 [2019-10-02 00:10:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:26,629 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2019-10-02 00:10:26,629 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 00:10:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2019-10-02 00:10:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-02 00:10:26,630 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:26,631 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:26,631 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:26,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1510466474, now seen corresponding path program 6 times [2019-10-02 00:10:26,631 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:26,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:26,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:26,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:26,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:26,638 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:26,639 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:26,639 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 00:10:26,668 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 00:10:26,696 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-02 00:10:26,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:26,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 00:10:26,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-02 00:10:26,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:26,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 00:10:26,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 00:10:26,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 00:10:26,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:10:26,757 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 6 states. [2019-10-02 00:10:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:26,870 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2019-10-02 00:10:26,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 00:10:26,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2019-10-02 00:10:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:26,872 INFO L225 Difference]: With dead ends: 216 [2019-10-02 00:10:26,872 INFO L226 Difference]: Without dead ends: 191 [2019-10-02 00:10:26,873 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:10:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-10-02 00:10:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 104. [2019-10-02 00:10:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-02 00:10:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2019-10-02 00:10:26,886 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 68 [2019-10-02 00:10:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:26,887 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2019-10-02 00:10:26,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 00:10:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2019-10-02 00:10:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-02 00:10:26,888 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:26,888 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:26,888 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash -155354480, now seen corresponding path program 7 times [2019-10-02 00:10:26,889 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:26,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:26,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:26,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:26,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:26,897 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:26,897 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:26,898 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 00:10:26,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:10:26,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 00:10:26,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:10:27,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:27,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 00:10:27,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 00:10:27,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 00:10:27,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 00:10:27,066 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand 9 states. [2019-10-02 00:10:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:27,188 INFO L93 Difference]: Finished difference Result 218 states and 285 transitions. [2019-10-02 00:10:27,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 00:10:27,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2019-10-02 00:10:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:27,190 INFO L225 Difference]: With dead ends: 218 [2019-10-02 00:10:27,190 INFO L226 Difference]: Without dead ends: 127 [2019-10-02 00:10:27,191 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 00:10:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-02 00:10:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2019-10-02 00:10:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-02 00:10:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2019-10-02 00:10:27,202 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 86 [2019-10-02 00:10:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:27,203 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2019-10-02 00:10:27,203 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 00:10:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2019-10-02 00:10:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-02 00:10:27,204 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:27,204 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:27,204 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1646989565, now seen corresponding path program 8 times [2019-10-02 00:10:27,205 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:27,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:27,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:27,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:27,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:27,212 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:27,212 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:27,212 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:27,246 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 00:10:27,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 00:10:27,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:27,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 00:10:27,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-10-02 00:10:27,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:27,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 00:10:27,404 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 00:10:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 00:10:27,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 00:10:27,405 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 10 states. [2019-10-02 00:10:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:27,539 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2019-10-02 00:10:27,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 00:10:27,540 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2019-10-02 00:10:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:27,541 INFO L225 Difference]: With dead ends: 245 [2019-10-02 00:10:27,541 INFO L226 Difference]: Without dead ends: 141 [2019-10-02 00:10:27,542 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 00:10:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-02 00:10:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2019-10-02 00:10:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-02 00:10:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2019-10-02 00:10:27,554 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 97 [2019-10-02 00:10:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:27,554 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2019-10-02 00:10:27,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 00:10:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2019-10-02 00:10:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-02 00:10:27,558 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:27,558 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:27,558 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:27,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1261139824, now seen corresponding path program 9 times [2019-10-02 00:10:27,558 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:27,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:27,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:27,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:27,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:27,573 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:27,573 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:27,573 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:27,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 00:10:27,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-02 00:10:27,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:27,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 00:10:27,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:27,730 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-02 00:10:27,731 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-02 00:10:27,735 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-02 00:10:27,736 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-02 00:10:27,736 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-02 00:10:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:10:27,778 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:10:27,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 00:10:27,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 00:10:27,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 00:10:27,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:10:27,779 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand 6 states. [2019-10-02 00:10:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:27,862 INFO L93 Difference]: Finished difference Result 251 states and 323 transitions. [2019-10-02 00:10:27,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 00:10:27,862 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-02 00:10:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:27,864 INFO L225 Difference]: With dead ends: 251 [2019-10-02 00:10:27,864 INFO L226 Difference]: Without dead ends: 150 [2019-10-02 00:10:27,866 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-02 00:10:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-02 00:10:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2019-10-02 00:10:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-02 00:10:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2019-10-02 00:10:27,882 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 108 [2019-10-02 00:10:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:27,883 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2019-10-02 00:10:27,883 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 00:10:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2019-10-02 00:10:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-02 00:10:27,884 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:27,884 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 20, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:27,884 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:27,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2100173486, now seen corresponding path program 1 times [2019-10-02 00:10:27,885 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:27,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:27,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:27,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:27,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:27,898 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:27,899 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:27,899 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:27,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:10:27,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-02 00:10:27,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:10:28,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:28,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 00:10:28,094 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 00:10:28,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 00:10:28,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 00:10:28,094 INFO L87 Difference]: Start difference. First operand 132 states and 166 transitions. Second operand 11 states. [2019-10-02 00:10:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:28,238 INFO L93 Difference]: Finished difference Result 272 states and 353 transitions. [2019-10-02 00:10:28,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 00:10:28,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2019-10-02 00:10:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:28,240 INFO L225 Difference]: With dead ends: 272 [2019-10-02 00:10:28,240 INFO L226 Difference]: Without dead ends: 155 [2019-10-02 00:10:28,241 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 00:10:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-10-02 00:10:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2019-10-02 00:10:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-10-02 00:10:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2019-10-02 00:10:28,254 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 108 [2019-10-02 00:10:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:28,254 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2019-10-02 00:10:28,255 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 00:10:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2019-10-02 00:10:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-02 00:10:28,256 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:28,256 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 23, 16, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:28,256 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash 225026463, now seen corresponding path program 2 times [2019-10-02 00:10:28,257 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:28,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:28,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:28,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:10:28,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:28,271 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:28,271 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:28,271 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:28,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 00:10:28,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 00:10:28,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:28,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-02 00:10:28,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-02 00:10:28,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:28,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 00:10:28,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 00:10:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 00:10:28,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 00:10:28,496 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand 12 states. [2019-10-02 00:10:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:28,676 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2019-10-02 00:10:28,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 00:10:28,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 119 [2019-10-02 00:10:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:28,678 INFO L225 Difference]: With dead ends: 299 [2019-10-02 00:10:28,678 INFO L226 Difference]: Without dead ends: 169 [2019-10-02 00:10:28,679 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 00:10:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-10-02 00:10:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2019-10-02 00:10:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-10-02 00:10:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2019-10-02 00:10:28,691 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 119 [2019-10-02 00:10:28,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:28,692 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2019-10-02 00:10:28,692 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 00:10:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2019-10-02 00:10:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-02 00:10:28,693 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:28,694 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 26, 18, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:28,694 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:28,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1333730318, now seen corresponding path program 3 times [2019-10-02 00:10:28,694 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:28,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:28,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:28,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:28,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:28,702 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:28,702 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:28,702 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:28,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 00:10:29,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-02 00:10:29,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:29,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 00:10:29,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:10:29,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:29,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 00:10:29,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 00:10:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 00:10:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 00:10:29,921 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand 13 states. [2019-10-02 00:10:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:30,106 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2019-10-02 00:10:30,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 00:10:30,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 130 [2019-10-02 00:10:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:30,108 INFO L225 Difference]: With dead ends: 326 [2019-10-02 00:10:30,108 INFO L226 Difference]: Without dead ends: 183 [2019-10-02 00:10:30,109 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 00:10:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-10-02 00:10:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2019-10-02 00:10:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-10-02 00:10:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 220 transitions. [2019-10-02 00:10:30,124 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 220 transitions. Word has length 130 [2019-10-02 00:10:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:30,125 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 220 transitions. [2019-10-02 00:10:30,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 00:10:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 220 transitions. [2019-10-02 00:10:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 00:10:30,126 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:30,127 INFO L411 BasicCegarLoop]: trace histogram [30, 30, 29, 20, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:30,127 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:30,127 INFO L82 PathProgramCache]: Analyzing trace with hash -135881921, now seen corresponding path program 4 times [2019-10-02 00:10:30,127 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:30,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:30,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:30,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:30,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:30,136 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:30,136 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:30,136 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:30,171 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 00:10:30,227 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 00:10:30,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:10:30,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-02 00:10:30,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:10:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1642 backedges. 117 proven. 1000 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-02 00:10:30,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:10:30,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 00:10:30,442 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 00:10:30,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 00:10:30,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-10-02 00:10:30,442 INFO L87 Difference]: Start difference. First operand 174 states and 220 transitions. Second operand 17 states. [2019-10-02 00:10:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:10:30,999 INFO L93 Difference]: Finished difference Result 480 states and 616 transitions. [2019-10-02 00:10:31,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-02 00:10:31,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 141 [2019-10-02 00:10:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:10:31,003 INFO L225 Difference]: With dead ends: 480 [2019-10-02 00:10:31,003 INFO L226 Difference]: Without dead ends: 440 [2019-10-02 00:10:31,005 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2019-10-02 00:10:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2019-10-02 00:10:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 207. [2019-10-02 00:10:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-10-02 00:10:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 264 transitions. [2019-10-02 00:10:31,026 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 264 transitions. Word has length 141 [2019-10-02 00:10:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:10:31,027 INFO L475 AbstractCegarLoop]: Abstraction has 207 states and 264 transitions. [2019-10-02 00:10:31,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 00:10:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 264 transitions. [2019-10-02 00:10:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-02 00:10:31,029 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:10:31,029 INFO L411 BasicCegarLoop]: trace histogram [40, 40, 39, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:10:31,029 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:10:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:10:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1725028030, now seen corresponding path program 5 times [2019-10-02 00:10:31,030 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:10:31,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:10:31,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:31,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:10:31,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:10:31,037 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:10:31,037 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:10:31,038 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:10:31,064 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1