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/rev-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 00:11:16,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 00:11:16,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 00:11:16,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 00:11:16,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 00:11:16,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 00:11:16,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 00:11:16,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 00:11:16,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 00:11:16,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 00:11:16,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 00:11:16,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 00:11:16,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 00:11:16,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 00:11:16,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 00:11:16,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 00:11:16,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 00:11:16,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 00:11:16,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 00:11:16,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 00:11:16,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 00:11:16,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 00:11:16,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 00:11:16,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 00:11:16,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 00:11:16,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 00:11:16,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 00:11:16,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 00:11:16,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 00:11:16,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 00:11:16,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 00:11:16,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 00:11:16,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 00:11:16,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 00:11:16,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 00:11:16,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 00:11:16,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 00:11:16,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 00:11:16,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 00:11:16,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 00:11:16,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 00:11:16,118 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 00:11:16,142 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 00:11:16,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 00:11:16,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 00:11:16,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 00:11:16,143 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 00:11:16,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 00:11:16,144 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 00:11:16,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 00:11:16,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 00:11:16,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 00:11:16,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 00:11:16,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 00:11:16,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 00:11:16,145 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 00:11:16,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 00:11:16,146 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 00:11:16,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 00:11:16,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 00:11:16,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 00:11:16,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 00:11:16,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 00:11:16,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 00:11:16,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 00:11:16,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 00:11:16,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 00:11:16,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 00:11:16,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 00:11:16,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 00:11:16,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 00:11:16,181 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 00:11:16,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 00:11:16,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 00:11:16,197 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 00:11:16,198 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 00:11:16,199 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-10-02 00:11:16,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c001db3f/4753be1025124ee2abff627c7773eda4/FLAGab942d381 [2019-10-02 00:11:16,670 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 00:11:16,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-10-02 00:11:16,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c001db3f/4753be1025124ee2abff627c7773eda4/FLAGab942d381 [2019-10-02 00:11:17,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c001db3f/4753be1025124ee2abff627c7773eda4 [2019-10-02 00:11:17,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 00:11:17,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 00:11:17,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 00:11:17,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 00:11:17,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 00:11:17,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a632ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17, skipping insertion in model container [2019-10-02 00:11:17,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,097 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 00:11:17,115 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 00:11:17,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:11:17,350 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 00:11:17,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:11:17,505 INFO L192 MainTranslator]: Completed translation [2019-10-02 00:11:17,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17 WrapperNode [2019-10-02 00:11:17,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 00:11:17,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 00:11:17,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 00:11:17,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 00:11:17,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (1/1) ... [2019-10-02 00:11:17,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 00:11:17,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 00:11:17,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 00:11:17,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 00:11:17,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (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 00:11:17,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 00:11:17,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 00:11:17,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 00:11:17,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 00:11:17,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 00:11:17,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 00:11:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 00:11:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 00:11:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 00:11:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 00:11:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 00:11:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 00:11:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 00:11:17,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 00:11:17,970 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 00:11:17,970 INFO L283 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-02 00:11:17,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:11:17 BoogieIcfgContainer [2019-10-02 00:11:17,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 00:11:17,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 00:11:17,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 00:11:17,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 00:11:17,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 12:11:17" (1/3) ... [2019-10-02 00:11:17,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b48115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:11:17, skipping insertion in model container [2019-10-02 00:11:17,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:11:17" (2/3) ... [2019-10-02 00:11:17,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b48115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:11:17, skipping insertion in model container [2019-10-02 00:11:17,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:11:17" (3/3) ... [2019-10-02 00:11:17,997 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2019-10-02 00:11:18,007 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 00:11:18,013 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 00:11:18,030 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 00:11:18,061 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 00:11:18,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 00:11:18,062 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 00:11:18,062 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 00:11:18,063 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 00:11:18,063 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 00:11:18,063 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 00:11:18,063 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 00:11:18,063 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 00:11:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-10-02 00:11:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 00:11:18,087 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:18,088 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:11:18,090 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:18,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1773460249, now seen corresponding path program 1 times [2019-10-02 00:11:18,096 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:18,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:18,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:18,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:18,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:18,181 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:18,181 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:18,181 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 00:11:18,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:11:18,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-02 00:11:18,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:18,264 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 00:11:18,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:11:18,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 00:11:18,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 00:11:18,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 00:11:18,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 00:11:18,286 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-10-02 00:11:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:18,314 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-10-02 00:11:18,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 00:11:18,315 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-02 00:11:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:18,324 INFO L225 Difference]: With dead ends: 66 [2019-10-02 00:11:18,324 INFO L226 Difference]: Without dead ends: 31 [2019-10-02 00:11:18,328 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 00:11:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-02 00:11:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-02 00:11:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-02 00:11:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-10-02 00:11:18,368 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2019-10-02 00:11:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:18,368 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-10-02 00:11:18,368 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 00:11:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-10-02 00:11:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 00:11:18,370 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:18,370 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:11:18,370 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:18,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1763514787, now seen corresponding path program 1 times [2019-10-02 00:11:18,371 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:18,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:18,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:18,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:18,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:18,382 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:18,382 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:18,382 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 00:11:18,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:11:18,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:11:18,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:18,490 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 00:11:18,499 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:11:18,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 00:11:18,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 00:11:18,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 00:11:18,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 00:11:18,502 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 3 states. [2019-10-02 00:11:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:18,586 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-10-02 00:11:18,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 00:11:18,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-02 00:11:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:18,589 INFO L225 Difference]: With dead ends: 56 [2019-10-02 00:11:18,589 INFO L226 Difference]: Without dead ends: 36 [2019-10-02 00:11:18,590 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 00:11:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-02 00:11:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-10-02 00:11:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-02 00:11:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-02 00:11:18,598 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-10-02 00:11:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:18,598 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-02 00:11:18,598 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 00:11:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-02 00:11:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-02 00:11:18,600 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:18,600 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 00:11:18,600 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2133227694, now seen corresponding path program 1 times [2019-10-02 00:11:18,601 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:18,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:18,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:18,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:18,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:18,610 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:18,610 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:18,610 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) [2019-10-02 00:11:18,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:11:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:11:18,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:11:18,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:18,685 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 00:11:18,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:11:18,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 00:11:18,690 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:11:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:11:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:11:18,691 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-10-02 00:11:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:18,813 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2019-10-02 00:11:18,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:11:18,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-02 00:11:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:18,816 INFO L225 Difference]: With dead ends: 71 [2019-10-02 00:11:18,817 INFO L226 Difference]: Without dead ends: 46 [2019-10-02 00:11:18,817 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 00:11:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-02 00:11:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2019-10-02 00:11:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-02 00:11:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-10-02 00:11:18,830 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-10-02 00:11:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:18,831 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-10-02 00:11:18,831 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:11:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-10-02 00:11:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-02 00:11:18,832 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:18,833 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, 1, 1, 1] [2019-10-02 00:11:18,833 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1108398309, now seen corresponding path program 1 times [2019-10-02 00:11:18,834 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:18,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:18,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:18,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:18,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:18,842 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:18,842 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:18,843 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 00:11:18,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:11:18,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:11:18,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:11:18,945 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:11:18,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 00:11:18,946 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:11:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:11:18,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:11:18,946 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 4 states. [2019-10-02 00:11:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:19,045 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-10-02 00:11:19,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:11:19,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-02 00:11:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:19,047 INFO L225 Difference]: With dead ends: 71 [2019-10-02 00:11:19,047 INFO L226 Difference]: Without dead ends: 43 [2019-10-02 00:11:19,048 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 00:11:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-02 00:11:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2019-10-02 00:11:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-02 00:11:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-02 00:11:19,056 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2019-10-02 00:11:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:19,056 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-02 00:11:19,056 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:11:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-02 00:11:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-02 00:11:19,057 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:19,057 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, 1, 1, 1, 1] [2019-10-02 00:11:19,058 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1602833213, now seen corresponding path program 1 times [2019-10-02 00:11:19,058 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:19,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:19,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:19,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,067 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:19,067 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:19,067 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) [2019-10-02 00:11:19,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:11:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:11:19,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 00:11:19,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:11:19,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:11:19,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 00:11:19,168 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 00:11:19,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 00:11:19,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 00:11:19,170 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-10-02 00:11:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:19,261 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-10-02 00:11:19,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 00:11:19,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-02 00:11:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:19,263 INFO L225 Difference]: With dead ends: 79 [2019-10-02 00:11:19,263 INFO L226 Difference]: Without dead ends: 48 [2019-10-02 00:11:19,264 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 00:11:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-02 00:11:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-10-02 00:11:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-02 00:11:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-02 00:11:19,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2019-10-02 00:11:19,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:19,273 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-02 00:11:19,273 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 00:11:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-02 00:11:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-02 00:11:19,274 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:19,274 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, 1, 1, 1, 1] [2019-10-02 00:11:19,274 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:19,275 INFO L82 PathProgramCache]: Analyzing trace with hash 249553947, now seen corresponding path program 2 times [2019-10-02 00:11:19,275 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:19,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:19,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:19,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,282 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:19,283 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:19,283 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:11:19,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 00:11:19,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-02 00:11:19,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:11:19,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:11:19,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-02 00:11:19,342 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:11:19,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 00:11:19,342 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:11:19,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:11:19,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:11:19,343 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-10-02 00:11:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:19,416 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2019-10-02 00:11:19,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:11:19,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-02 00:11:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:19,418 INFO L225 Difference]: With dead ends: 89 [2019-10-02 00:11:19,418 INFO L226 Difference]: Without dead ends: 70 [2019-10-02 00:11:19,418 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 00:11:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-02 00:11:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2019-10-02 00:11:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-02 00:11:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-02 00:11:19,427 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2019-10-02 00:11:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:19,428 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-02 00:11:19,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:11:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-02 00:11:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-02 00:11:19,429 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:19,429 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 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 00:11:19,429 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:19,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1698801625, now seen corresponding path program 1 times [2019-10-02 00:11:19,430 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:19,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:19,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:11:19,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,437 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:19,438 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:19,438 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 00:11:19,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:11:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:11:19,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 00:11:19,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-02 00:11:19,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:11:19,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 00:11:19,527 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 00:11:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 00:11:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:11:19,528 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-10-02 00:11:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:19,647 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2019-10-02 00:11:19,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 00:11:19,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-02 00:11:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:19,649 INFO L225 Difference]: With dead ends: 89 [2019-10-02 00:11:19,649 INFO L226 Difference]: Without dead ends: 52 [2019-10-02 00:11:19,650 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 00:11:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-02 00:11:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-02 00:11:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-02 00:11:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2019-10-02 00:11:19,659 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2019-10-02 00:11:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:19,659 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2019-10-02 00:11:19,659 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 00:11:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2019-10-02 00:11:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-02 00:11:19,661 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:19,661 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 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 00:11:19,661 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash -602786922, now seen corresponding path program 2 times [2019-10-02 00:11:19,662 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:19,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:19,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:11:19,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,669 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:19,669 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:19,669 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 00:11:19,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:11:19,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 00:11:19,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:11:19,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 00:11:19,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:11:19,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:11:19,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 00:11:19,777 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 00:11:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 00:11:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 00:11:19,778 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2019-10-02 00:11:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:19,917 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2019-10-02 00:11:19,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 00:11:19,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-02 00:11:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:19,919 INFO L225 Difference]: With dead ends: 99 [2019-10-02 00:11:19,919 INFO L226 Difference]: Without dead ends: 57 [2019-10-02 00:11:19,920 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 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 00:11:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-02 00:11:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-10-02 00:11:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-02 00:11:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-10-02 00:11:19,939 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 35 [2019-10-02 00:11:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:19,939 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-10-02 00:11:19,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 00:11:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-10-02 00:11:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 00:11:19,941 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:19,942 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 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 00:11:19,942 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:19,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:19,942 INFO L82 PathProgramCache]: Analyzing trace with hash -119527047, now seen corresponding path program 3 times [2019-10-02 00:11:19,942 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:19,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:19,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:11:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:19,958 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:19,958 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:19,958 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 00:11:19,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 00:11:20,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-02 00:11:20,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:11:20,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 00:11:20,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-02 00:11:20,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:11:20,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 00:11:20,050 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 00:11:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 00:11:20,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 00:11:20,056 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 5 states. [2019-10-02 00:11:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:20,184 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2019-10-02 00:11:20,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 00:11:20,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-10-02 00:11:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:20,186 INFO L225 Difference]: With dead ends: 165 [2019-10-02 00:11:20,186 INFO L226 Difference]: Without dead ends: 128 [2019-10-02 00:11:20,187 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 00:11:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-02 00:11:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2019-10-02 00:11:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-02 00:11:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-10-02 00:11:20,208 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 37 [2019-10-02 00:11:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:20,208 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-10-02 00:11:20,208 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 00:11:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-10-02 00:11:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-02 00:11:20,211 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:20,211 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:11:20,212 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:20,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1459343723, now seen corresponding path program 4 times [2019-10-02 00:11:20,212 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:20,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:20,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:20,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:11:20,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:20,225 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:20,225 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:20,225 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 00:11:20,245 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 00:11:20,276 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 00:11:20,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:11:20,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 00:11:20,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:11:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-02 00:11:20,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:11:20,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 00:11:20,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 00:11:20,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 00:11:20,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-02 00:11:20,334 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 7 states. [2019-10-02 00:11:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:11:20,513 INFO L93 Difference]: Finished difference Result 241 states and 295 transitions. [2019-10-02 00:11:20,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 00:11:20,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2019-10-02 00:11:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:11:20,515 INFO L225 Difference]: With dead ends: 241 [2019-10-02 00:11:20,515 INFO L226 Difference]: Without dead ends: 165 [2019-10-02 00:11:20,516 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-02 00:11:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-02 00:11:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 125. [2019-10-02 00:11:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-02 00:11:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2019-10-02 00:11:20,534 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 57 [2019-10-02 00:11:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:11:20,535 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2019-10-02 00:11:20,535 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 00:11:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2019-10-02 00:11:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-02 00:11:20,536 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:11:20,536 INFO L411 BasicCegarLoop]: trace histogram [16, 12, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:11:20,537 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:11:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:11:20,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1727359831, now seen corresponding path program 5 times [2019-10-02 00:11:20,537 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:11:20,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:11:20,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:20,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:11:20,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:11:20,545 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:11:20,545 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:11:20,546 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:11:20,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1