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/reducercommutativity/rangesum40.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 14:33:41,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 14:33:41,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 14:33:41,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 14:33:41,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 14:33:41,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 14:33:41,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 14:33:41,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 14:33:41,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 14:33:41,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 14:33:41,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 14:33:41,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 14:33:41,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 14:33:41,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 14:33:41,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 14:33:41,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 14:33:41,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 14:33:41,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 14:33:41,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 14:33:41,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 14:33:41,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 14:33:41,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 14:33:41,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 14:33:41,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 14:33:41,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 14:33:41,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 14:33:41,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 14:33:41,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 14:33:41,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 14:33:41,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 14:33:41,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 14:33:41,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 14:33:41,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 14:33:41,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 14:33:41,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 14:33:41,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 14:33:41,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 14:33:41,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 14:33:41,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 14:33:41,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 14:33:41,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 14:33:41,907 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 14:33:41,921 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 14:33:41,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 14:33:41,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 14:33:41,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 14:33:41,923 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 14:33:41,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 14:33:41,923 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 14:33:41,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 14:33:41,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 14:33:41,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 14:33:41,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 14:33:41,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 14:33:41,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 14:33:41,925 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 14:33:41,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 14:33:41,925 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 14:33:41,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 14:33:41,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 14:33:41,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 14:33:41,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 14:33:41,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 14:33:41,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 14:33:41,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 14:33:41,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 14:33:41,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 14:33:41,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 14:33:41,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 14:33:41,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 14:33:41,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 14:33:41,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 14:33:41,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 14:33:41,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 14:33:41,987 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 14:33:41,988 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 14:33:41,989 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum40.i [2019-10-02 14:33:42,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5081a40a/94035f51c9cc4b948ccf4677aba7fd71/FLAG73ee91640 [2019-10-02 14:33:42,528 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 14:33:42,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i [2019-10-02 14:33:42,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5081a40a/94035f51c9cc4b948ccf4677aba7fd71/FLAG73ee91640 [2019-10-02 14:33:42,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5081a40a/94035f51c9cc4b948ccf4677aba7fd71 [2019-10-02 14:33:42,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 14:33:42,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 14:33:42,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 14:33:42,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 14:33:42,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 14:33:42,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 02:33:42" (1/1) ... [2019-10-02 14:33:42,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ea86b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:42, skipping insertion in model container [2019-10-02 14:33:42,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 02:33:42" (1/1) ... [2019-10-02 14:33:42,947 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 14:33:42,969 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 14:33:43,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 14:33:43,200 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 14:33:43,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 14:33:43,328 INFO L192 MainTranslator]: Completed translation [2019-10-02 14:33:43,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43 WrapperNode [2019-10-02 14:33:43,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 14:33:43,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 14:33:43,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 14:33:43,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 14:33:43,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (1/1) ... [2019-10-02 14:33:43,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (1/1) ... [2019-10-02 14:33:43,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (1/1) ... [2019-10-02 14:33:43,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (1/1) ... [2019-10-02 14:33:43,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (1/1) ... [2019-10-02 14:33:43,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (1/1) ... [2019-10-02 14:33:43,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (1/1) ... [2019-10-02 14:33:43,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 14:33:43,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 14:33:43,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 14:33:43,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 14:33:43,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (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 14:33:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 14:33:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 14:33:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2019-10-02 14:33:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2019-10-02 14:33:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 14:33:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 14:33:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 14:33:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2019-10-02 14:33:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 14:33:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2019-10-02 14:33:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 14:33:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 14:33:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 14:33:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 14:33:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 14:33:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 14:33:43,766 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 14:33:43,766 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-02 14:33:43,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 02:33:43 BoogieIcfgContainer [2019-10-02 14:33:43,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 14:33:43,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 14:33:43,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 14:33:43,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 14:33:43,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 02:33:42" (1/3) ... [2019-10-02 14:33:43,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7643b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 02:33:43, skipping insertion in model container [2019-10-02 14:33:43,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:33:43" (2/3) ... [2019-10-02 14:33:43,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7643b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 02:33:43, skipping insertion in model container [2019-10-02 14:33:43,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 02:33:43" (3/3) ... [2019-10-02 14:33:43,776 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2019-10-02 14:33:43,785 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 14:33:43,793 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 14:33:43,811 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 14:33:43,844 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 14:33:43,845 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 14:33:43,845 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 14:33:43,845 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 14:33:43,845 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 14:33:43,845 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 14:33:43,846 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 14:33:43,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 14:33:43,846 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 14:33:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-02 14:33:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 14:33:43,870 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:43,871 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, 1, 1, 1] [2019-10-02 14:33:43,873 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2019-10-02 14:33:43,881 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:43,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:43,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:43,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:43,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:44,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2019-10-02 14:33:44,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 14:33:44,032 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 14:33:44,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:44,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-02 14:33:44,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream closed [2019-10-02 14:33:44,221 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 14:33:44,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 14:33:44,226 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 14:33:44,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 14:33:44,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 14:33:44,251 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-10-02 14:33:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:44,297 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2019-10-02 14:33:44,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 14:33:44,299 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2019-10-02 14:33:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:44,316 INFO L225 Difference]: With dead ends: 64 [2019-10-02 14:33:44,316 INFO L226 Difference]: Without dead ends: 32 [2019-10-02 14:33:44,325 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 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 14:33:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-02 14:33:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-02 14:33:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-02 14:33:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-02 14:33:44,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2019-10-02 14:33:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:44,388 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-02 14:33:44,389 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 14:33:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-02 14:33:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 14:33:44,394 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:44,395 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, 1, 1, 1] [2019-10-02 14:33:44,395 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2019-10-02 14:33:44,397 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:44,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:44,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:44,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:44,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:44,445 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:44,445 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:44,445 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) [2019-10-02 14:33:44,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:44,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-02 14:33:44,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-02 14:33:44,608 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 14:33:44,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 14:33:44,610 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 14:33:44,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 14:33:44,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 14:33:44,610 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2019-10-02 14:33:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:44,633 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-10-02 14:33:44,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 14:33:44,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-10-02 14:33:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:44,636 INFO L225 Difference]: With dead ends: 56 [2019-10-02 14:33:44,636 INFO L226 Difference]: Without dead ends: 34 [2019-10-02 14:33:44,637 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 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 14:33:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-02 14:33:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-02 14:33:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-02 14:33:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-02 14:33:44,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2019-10-02 14:33:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:44,646 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-02 14:33:44,646 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 14:33:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-02 14:33:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-02 14:33:44,648 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:44,648 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, 1, 1, 1, 1, 1] [2019-10-02 14:33:44,648 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2019-10-02 14:33:44,649 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:44,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:44,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:44,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:44,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:44,666 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:44,666 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:44,666 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 14:33:44,702 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 14:33:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:44,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 14:33:44,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-02 14:33:44,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 14:33:44,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 14:33:44,765 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 14:33:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 14:33:44,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 14:33:44,766 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2019-10-02 14:33:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:44,785 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-10-02 14:33:44,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 14:33:44,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-02 14:33:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:44,789 INFO L225 Difference]: With dead ends: 57 [2019-10-02 14:33:44,789 INFO L226 Difference]: Without dead ends: 39 [2019-10-02 14:33:44,790 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 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 14:33:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-02 14:33:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-10-02 14:33:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-02 14:33:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-02 14:33:44,801 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2019-10-02 14:33:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:44,802 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-02 14:33:44,802 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 14:33:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-02 14:33:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-02 14:33:44,804 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:44,805 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, 1, 1, 1, 1, 1] [2019-10-02 14:33:44,805 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:44,805 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2019-10-02 14:33:44,806 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:44,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:44,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:44,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:44,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-02 14:33:44,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 14:33:44,886 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 14:33:44,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:44,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-02 14:33:44,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-02 14:33:44,991 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:44,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-10-02 14:33:44,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 14:33:44,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 14:33:44,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:33:44,992 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2019-10-02 14:33:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:45,042 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-10-02 14:33:45,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 14:33:45,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-10-02 14:33:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:45,047 INFO L225 Difference]: With dead ends: 62 [2019-10-02 14:33:45,047 INFO L226 Difference]: Without dead ends: 40 [2019-10-02 14:33:45,048 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 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 14:33:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-02 14:33:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-02 14:33:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-02 14:33:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-02 14:33:45,063 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 39 [2019-10-02 14:33:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:45,064 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-02 14:33:45,064 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 14:33:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-02 14:33:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-02 14:33:45,070 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:45,070 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-02 14:33:45,070 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2019-10-02 14:33:45,075 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:45,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:45,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:45,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-02 14:33:45,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 14:33:45,164 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 -t:12000 (exit command is (exit), workingDir is null) [2019-10-02 14:33:45,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 14:33:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:45,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-02 14:33:45,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:33:45,262 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:45,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-10-02 14:33:45,263 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:33:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:33:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:33:45,264 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2019-10-02 14:33:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:45,312 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2019-10-02 14:33:45,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:33:45,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-10-02 14:33:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:45,314 INFO L225 Difference]: With dead ends: 68 [2019-10-02 14:33:45,314 INFO L226 Difference]: Without dead ends: 44 [2019-10-02 14:33:45,315 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:33:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-02 14:33:45,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-10-02 14:33:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-02 14:33:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-10-02 14:33:45,322 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 48 [2019-10-02 14:33:45,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:45,323 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-10-02 14:33:45,323 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:33:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-10-02 14:33:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-02 14:33:45,324 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:45,324 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:33:45,325 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1681907214, now seen corresponding path program 1 times [2019-10-02 14:33:45,325 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:45,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:45,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:45,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,338 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:45,339 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:45,339 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 14:33:45,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:45,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 14:33:45,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-02 14:33:45,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:45,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-02 14:33:45,472 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 14:33:45,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 14:33:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:33:45,473 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 4 states. [2019-10-02 14:33:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:45,509 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2019-10-02 14:33:45,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 14:33:45,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2019-10-02 14:33:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:45,511 INFO L225 Difference]: With dead ends: 68 [2019-10-02 14:33:45,511 INFO L226 Difference]: Without dead ends: 41 [2019-10-02 14:33:45,512 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 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 14:33:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-02 14:33:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-02 14:33:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-02 14:33:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-02 14:33:45,518 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 59 [2019-10-02 14:33:45,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:45,519 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-02 14:33:45,519 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 14:33:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-02 14:33:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 14:33:45,520 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:45,520 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 14:33:45,521 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 804630256, now seen corresponding path program 2 times [2019-10-02 14:33:45,521 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:45,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:45,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:45,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,534 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:45,535 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:45,535 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:45,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:33:45,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:33:45,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:45,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 14:33:45,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-02 14:33:45,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:45,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 14:33:45,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:33:45,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:33:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:33:45,655 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2019-10-02 14:33:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:45,677 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-10-02 14:33:45,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:33:45,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-10-02 14:33:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:45,678 INFO L225 Difference]: With dead ends: 70 [2019-10-02 14:33:45,679 INFO L226 Difference]: Without dead ends: 43 [2019-10-02 14:33:45,680 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 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 14:33:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-02 14:33:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-02 14:33:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-02 14:33:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-02 14:33:45,686 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 61 [2019-10-02 14:33:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:45,686 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-02 14:33:45,686 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:33:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-02 14:33:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-02 14:33:45,687 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:45,687 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-02 14:33:45,688 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1929644946, now seen corresponding path program 3 times [2019-10-02 14:33:45,688 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:45,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:45,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:45,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,701 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:45,701 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:45,701 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:45,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:33:45,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-02 14:33:45,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:45,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 14:33:45,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-02 14:33:45,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:45,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 14:33:45,811 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:33:45,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:33:45,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:33:45,812 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2019-10-02 14:33:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:45,845 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2019-10-02 14:33:45,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:33:45,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-02 14:33:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:45,848 INFO L225 Difference]: With dead ends: 70 [2019-10-02 14:33:45,848 INFO L226 Difference]: Without dead ends: 47 [2019-10-02 14:33:45,849 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 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 14:33:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-02 14:33:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-02 14:33:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-02 14:33:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-10-02 14:33:45,857 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 63 [2019-10-02 14:33:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:45,857 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-10-02 14:33:45,857 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:33:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-10-02 14:33:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-02 14:33:45,858 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:45,859 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-02 14:33:45,859 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash -575638740, now seen corresponding path program 4 times [2019-10-02 14:33:45,860 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:45,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:45,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:45,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:45,874 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:45,874 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:45,874 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) [2019-10-02 14:33:45,901 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:45,953 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:33:45,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:45,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 14:33:45,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 65 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-02 14:33:46,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:46,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 14:33:46,037 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 14:33:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 14:33:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:33:46,039 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 6 states. [2019-10-02 14:33:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:46,077 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-10-02 14:33:46,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 14:33:46,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-10-02 14:33:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:46,080 INFO L225 Difference]: With dead ends: 76 [2019-10-02 14:33:46,081 INFO L226 Difference]: Without dead ends: 50 [2019-10-02 14:33:46,081 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 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 14:33:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-02 14:33:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2019-10-02 14:33:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-02 14:33:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-10-02 14:33:46,089 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 72 [2019-10-02 14:33:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:46,089 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-10-02 14:33:46,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 14:33:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-10-02 14:33:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-02 14:33:46,090 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:46,091 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-02 14:33:46,091 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:46,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:46,091 INFO L82 PathProgramCache]: Analyzing trace with hash -680152530, now seen corresponding path program 5 times [2019-10-02 14:33:46,092 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:46,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:46,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:46,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,105 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:46,105 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:46,105 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) [2019-10-02 14:33:46,126 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:46,225 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-02 14:33:46,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:46,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 14:33:46,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-02 14:33:46,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:46,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-02 14:33:46,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 14:33:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 14:33:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:33:46,259 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 4 states. [2019-10-02 14:33:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:46,290 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2019-10-02 14:33:46,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 14:33:46,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-10-02 14:33:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:46,293 INFO L225 Difference]: With dead ends: 81 [2019-10-02 14:33:46,293 INFO L226 Difference]: Without dead ends: 52 [2019-10-02 14:33:46,294 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 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 14:33:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-02 14:33:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-02 14:33:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-02 14:33:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-10-02 14:33:46,305 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 81 [2019-10-02 14:33:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:46,309 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-10-02 14:33:46,309 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 14:33:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-10-02 14:33:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-02 14:33:46,310 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:46,310 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-02 14:33:46,315 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1893345446, now seen corresponding path program 6 times [2019-10-02 14:33:46,315 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:46,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:46,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:46,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,343 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:46,344 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:46,344 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 14:33:46,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:33:46,438 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-02 14:33:46,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:46,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 14:33:46,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-10-02 14:33:46,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:46,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-02 14:33:46,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 14:33:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 14:33:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:33:46,478 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 4 states. [2019-10-02 14:33:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:46,498 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2019-10-02 14:33:46,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 14:33:46,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-10-02 14:33:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:46,499 INFO L225 Difference]: With dead ends: 80 [2019-10-02 14:33:46,500 INFO L226 Difference]: Without dead ends: 54 [2019-10-02 14:33:46,504 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 87 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 14:33:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-02 14:33:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-02 14:33:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-02 14:33:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-02 14:33:46,514 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 90 [2019-10-02 14:33:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:46,515 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-02 14:33:46,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 14:33:46,515 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-02 14:33:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-02 14:33:46,516 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:46,516 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 14:33:46,516 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:46,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1039813832, now seen corresponding path program 7 times [2019-10-02 14:33:46,517 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:46,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:46,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:46,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,541 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:46,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:46,541 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) [2019-10-02 14:33:46,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:46,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 14:33:46,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-02 14:33:46,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:46,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 14:33:46,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 14:33:46,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 14:33:46,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:33:46,666 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 6 states. [2019-10-02 14:33:46,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:46,695 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-10-02 14:33:46,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 14:33:46,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2019-10-02 14:33:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:46,698 INFO L225 Difference]: With dead ends: 94 [2019-10-02 14:33:46,698 INFO L226 Difference]: Without dead ends: 56 [2019-10-02 14:33:46,699 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 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 14:33:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-02 14:33:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-02 14:33:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-02 14:33:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-10-02 14:33:46,711 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 92 [2019-10-02 14:33:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:46,712 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-10-02 14:33:46,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 14:33:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-10-02 14:33:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-02 14:33:46,713 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:46,713 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 4, 4, 3, 3, 3, 3, 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] [2019-10-02 14:33:46,714 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash -919939190, now seen corresponding path program 8 times [2019-10-02 14:33:46,718 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:46,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:46,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:46,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,740 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:46,740 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:46,741 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 14:33:46,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:33:46,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:33:46,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:46,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 14:33:46,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-02 14:33:46,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:46,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 14:33:46,883 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 14:33:46,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 14:33:46,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:33:46,884 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 7 states. [2019-10-02 14:33:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:46,912 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2019-10-02 14:33:46,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 14:33:46,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2019-10-02 14:33:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:46,914 INFO L225 Difference]: With dead ends: 96 [2019-10-02 14:33:46,914 INFO L226 Difference]: Without dead ends: 58 [2019-10-02 14:33:46,914 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 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 14:33:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-02 14:33:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-02 14:33:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-02 14:33:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-02 14:33:46,920 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 94 [2019-10-02 14:33:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:46,921 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-02 14:33:46,921 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 14:33:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-02 14:33:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-02 14:33:46,922 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:46,922 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 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] [2019-10-02 14:33:46,923 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:46,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1248049612, now seen corresponding path program 9 times [2019-10-02 14:33:46,923 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:46,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:46,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:46,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:46,937 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:46,937 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:46,937 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 14:33:46,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:33:47,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-02 14:33:47,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:47,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 14:33:47,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-02 14:33:47,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:47,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 14:33:47,069 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:33:47,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:33:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:33:47,070 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2019-10-02 14:33:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:47,091 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2019-10-02 14:33:47,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:33:47,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2019-10-02 14:33:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:47,094 INFO L225 Difference]: With dead ends: 86 [2019-10-02 14:33:47,094 INFO L226 Difference]: Without dead ends: 60 [2019-10-02 14:33:47,094 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 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 14:33:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-02 14:33:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-02 14:33:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-02 14:33:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-10-02 14:33:47,099 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 96 [2019-10-02 14:33:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:47,099 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-10-02 14:33:47,099 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:33:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-10-02 14:33:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-02 14:33:47,101 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:47,101 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 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, 1, 1, 1] [2019-10-02 14:33:47,101 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash -614192018, now seen corresponding path program 10 times [2019-10-02 14:33:47,102 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:47,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:47,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:47,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:47,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:47,113 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:47,113 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:47,113 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) [2019-10-02 14:33:47,139 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:47,191 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:33:47,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:47,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 14:33:47,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-02 14:33:47,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:47,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 14:33:47,233 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 14:33:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 14:33:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:33:47,234 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 6 states. [2019-10-02 14:33:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:47,260 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2019-10-02 14:33:47,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 14:33:47,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-02 14:33:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:47,262 INFO L225 Difference]: With dead ends: 88 [2019-10-02 14:33:47,262 INFO L226 Difference]: Without dead ends: 62 [2019-10-02 14:33:47,263 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 93 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 14:33:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-02 14:33:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-02 14:33:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-02 14:33:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-10-02 14:33:47,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 98 [2019-10-02 14:33:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:47,269 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-10-02 14:33:47,269 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 14:33:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-10-02 14:33:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-02 14:33:47,270 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:47,270 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 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, 1, 1, 1] [2019-10-02 14:33:47,271 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash 772963984, now seen corresponding path program 11 times [2019-10-02 14:33:47,271 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:47,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:47,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:47,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:47,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:47,282 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:47,282 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:47,283 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:33:47,306 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:33:47,341 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-02 14:33:47,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:47,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 14:33:47,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 192 proven. 15 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2019-10-02 14:33:47,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:47,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 14:33:47,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 14:33:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 14:33:47,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:33:47,391 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 7 states. [2019-10-02 14:33:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:47,434 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2019-10-02 14:33:47,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 14:33:47,435 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2019-10-02 14:33:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:47,436 INFO L225 Difference]: With dead ends: 104 [2019-10-02 14:33:47,436 INFO L226 Difference]: Without dead ends: 66 [2019-10-02 14:33:47,437 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 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 14:33:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-02 14:33:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-10-02 14:33:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-02 14:33:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-10-02 14:33:47,444 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 100 [2019-10-02 14:33:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:47,444 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-10-02 14:33:47,444 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 14:33:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-10-02 14:33:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-02 14:33:47,445 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:47,445 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 5, 5, 4, 4, 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, 1, 1, 1] [2019-10-02 14:33:47,446 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1268541062, now seen corresponding path program 12 times [2019-10-02 14:33:47,446 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:47,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:47,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:47,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:47,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:47,482 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:47,482 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:47,482 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 14:33:47,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:33:47,903 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-02 14:33:47,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:47,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-02 14:33:47,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 250 proven. 16 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-02 14:33:47,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:47,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 14:33:47,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 14:33:47,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 14:33:47,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:33:47,965 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 7 states. [2019-10-02 14:33:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:47,995 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2019-10-02 14:33:47,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 14:33:48,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2019-10-02 14:33:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:48,001 INFO L225 Difference]: With dead ends: 96 [2019-10-02 14:33:48,001 INFO L226 Difference]: Without dead ends: 67 [2019-10-02 14:33:48,001 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 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 14:33:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-02 14:33:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-02 14:33:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-02 14:33:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2019-10-02 14:33:48,009 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 109 [2019-10-02 14:33:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:48,010 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2019-10-02 14:33:48,010 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 14:33:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2019-10-02 14:33:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-02 14:33:48,011 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:48,011 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 5, 5, 5, 5, 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, 1, 1, 1] [2019-10-02 14:33:48,012 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash -188704604, now seen corresponding path program 13 times [2019-10-02 14:33:48,012 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:48,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:48,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:48,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:48,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:48,023 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:48,023 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:48,023 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) [2019-10-02 14:33:48,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:48,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 14:33:48,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-02 14:33:48,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:48,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 14:33:48,174 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 14:33:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 14:33:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:33:48,175 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 8 states. [2019-10-02 14:33:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:48,213 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2019-10-02 14:33:48,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 14:33:48,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2019-10-02 14:33:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:48,214 INFO L225 Difference]: With dead ends: 116 [2019-10-02 14:33:48,214 INFO L226 Difference]: Without dead ends: 69 [2019-10-02 14:33:48,215 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 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 14:33:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-02 14:33:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-02 14:33:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-02 14:33:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2019-10-02 14:33:48,219 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 111 [2019-10-02 14:33:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:48,220 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2019-10-02 14:33:48,220 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 14:33:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2019-10-02 14:33:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-02 14:33:48,221 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:48,221 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 6, 6, 5, 5, 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, 1, 1, 1] [2019-10-02 14:33:48,221 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:48,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2117844318, now seen corresponding path program 14 times [2019-10-02 14:33:48,222 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:48,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:48,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:48,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:48,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:48,233 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:48,233 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:48,233 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:48,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:33:48,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:33:48,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:48,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 14:33:48,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-02 14:33:48,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:48,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 14:33:48,387 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 14:33:48,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 14:33:48,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:33:48,388 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 9 states. [2019-10-02 14:33:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:48,422 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2019-10-02 14:33:48,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 14:33:48,423 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2019-10-02 14:33:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:48,424 INFO L225 Difference]: With dead ends: 118 [2019-10-02 14:33:48,424 INFO L226 Difference]: Without dead ends: 71 [2019-10-02 14:33:48,425 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 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 14:33:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-02 14:33:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-10-02 14:33:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-02 14:33:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-10-02 14:33:48,430 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 113 [2019-10-02 14:33:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:48,430 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-10-02 14:33:48,430 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 14:33:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-10-02 14:33:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-02 14:33:48,432 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:48,432 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 12, 7, 7, 6, 5, 5, 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, 1, 1, 1] [2019-10-02 14:33:48,432 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash -595237600, now seen corresponding path program 15 times [2019-10-02 14:33:48,433 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:48,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:48,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:48,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:48,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:48,445 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:48,445 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:48,445 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:33:48,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:48,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-02 14:33:48,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:48,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 14:33:48,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 250 proven. 25 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-10-02 14:33:48,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:48,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 14:33:48,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 14:33:48,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 14:33:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:33:48,818 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2019-10-02 14:33:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:48,853 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2019-10-02 14:33:48,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 14:33:48,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 115 [2019-10-02 14:33:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:48,861 INFO L225 Difference]: With dead ends: 102 [2019-10-02 14:33:48,862 INFO L226 Difference]: Without dead ends: 73 [2019-10-02 14:33:48,863 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 14:33:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-02 14:33:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-02 14:33:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-02 14:33:48,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-10-02 14:33:48,870 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 115 [2019-10-02 14:33:48,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:48,870 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-10-02 14:33:48,870 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 14:33:48,870 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-10-02 14:33:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-02 14:33:48,871 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:48,872 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 12, 7, 7, 6, 6, 6, 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, 1, 1, 1] [2019-10-02 14:33:48,872 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -278636354, now seen corresponding path program 16 times [2019-10-02 14:33:48,872 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:48,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:48,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:48,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:48,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:48,883 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:48,883 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:48,883 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:48,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:33:48,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:33:48,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:48,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 14:33:48,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2019-10-02 14:33:49,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:49,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 14:33:49,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 14:33:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 14:33:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:33:49,033 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 10 states. [2019-10-02 14:33:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:49,069 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2019-10-02 14:33:49,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 14:33:49,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 117 [2019-10-02 14:33:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:49,072 INFO L225 Difference]: With dead ends: 124 [2019-10-02 14:33:49,072 INFO L226 Difference]: Without dead ends: 75 [2019-10-02 14:33:49,073 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 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 14:33:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-02 14:33:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-02 14:33:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-02 14:33:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-10-02 14:33:49,078 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 117 [2019-10-02 14:33:49,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:49,078 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-10-02 14:33:49,079 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 14:33:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-10-02 14:33:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-02 14:33:49,080 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:49,080 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 12, 8, 8, 6, 6, 6, 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, 1, 1, 1] [2019-10-02 14:33:49,081 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash -407630788, now seen corresponding path program 17 times [2019-10-02 14:33:49,081 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:49,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:49,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:49,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:49,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:49,094 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:49,094 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:49,095 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:33:49,122 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:49,427 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-02 14:33:49,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:49,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 14:33:49,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 330 proven. 7 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Exception during sending of exit command (exit): Stream closed [2019-10-02 14:33:49,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:49,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 14:33:49,500 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:33:49,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:33:49,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:33:49,501 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 5 states. [2019-10-02 14:33:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:49,543 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2019-10-02 14:33:49,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:33:49,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-10-02 14:33:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:49,548 INFO L225 Difference]: With dead ends: 123 [2019-10-02 14:33:49,548 INFO L226 Difference]: Without dead ends: 78 [2019-10-02 14:33:49,548 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 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 14:33:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-02 14:33:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-02 14:33:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-02 14:33:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-10-02 14:33:49,554 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 119 [2019-10-02 14:33:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:49,555 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-10-02 14:33:49,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:33:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-10-02 14:33:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-02 14:33:49,556 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:49,557 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 6, 6, 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, 1, 1, 1] [2019-10-02 14:33:49,557 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1895654752, now seen corresponding path program 18 times [2019-10-02 14:33:49,558 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:49,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:49,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:49,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:49,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:49,570 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:49,570 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:49,570 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:33:49,596 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:50,253 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-10-02 14:33:50,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:50,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 14:33:50,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 363 proven. 26 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2019-10-02 14:33:50,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:50,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 14:33:50,325 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 14:33:50,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 14:33:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:33:50,326 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 8 states. [2019-10-02 14:33:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:50,374 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2019-10-02 14:33:50,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 14:33:50,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2019-10-02 14:33:50,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:50,375 INFO L225 Difference]: With dead ends: 130 [2019-10-02 14:33:50,375 INFO L226 Difference]: Without dead ends: 82 [2019-10-02 14:33:50,376 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 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 14:33:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-02 14:33:50,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-10-02 14:33:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-02 14:33:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2019-10-02 14:33:50,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 128 [2019-10-02 14:33:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:50,381 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2019-10-02 14:33:50,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 14:33:50,381 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2019-10-02 14:33:50,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-02 14:33:50,382 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:50,383 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 15, 9, 8, 8, 6, 6, 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, 1, 1, 1] [2019-10-02 14:33:50,383 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1844361850, now seen corresponding path program 19 times [2019-10-02 14:33:50,383 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:50,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:50,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:50,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:50,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:50,396 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:50,396 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:50,396 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:50,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:50,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-02 14:33:50,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:33:50,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:50,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 14:33:50,546 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 14:33:50,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 14:33:50,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 14:33:50,547 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 11 states. [2019-10-02 14:33:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:50,595 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2019-10-02 14:33:50,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 14:33:50,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 137 [2019-10-02 14:33:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:50,598 INFO L225 Difference]: With dead ends: 138 [2019-10-02 14:33:50,598 INFO L226 Difference]: Without dead ends: 83 [2019-10-02 14:33:50,599 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 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 14:33:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-02 14:33:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-10-02 14:33:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-02 14:33:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2019-10-02 14:33:50,603 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 137 [2019-10-02 14:33:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:50,604 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2019-10-02 14:33:50,604 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 14:33:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2019-10-02 14:33:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-02 14:33:50,605 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:50,605 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 15, 9, 9, 9, 6, 6, 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, 1, 1, 1] [2019-10-02 14:33:50,605 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:50,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1336918776, now seen corresponding path program 20 times [2019-10-02 14:33:50,606 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:50,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:50,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:50,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:50,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:50,618 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:50,619 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:50,619 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:50,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:33:50,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:33:50,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:50,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-02 14:33:50,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2019-10-02 14:33:50,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:50,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 14:33:50,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 14:33:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 14:33:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:33:50,807 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 12 states. [2019-10-02 14:33:50,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:50,850 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2019-10-02 14:33:50,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 14:33:50,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 139 [2019-10-02 14:33:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:50,851 INFO L225 Difference]: With dead ends: 140 [2019-10-02 14:33:50,852 INFO L226 Difference]: Without dead ends: 85 [2019-10-02 14:33:50,852 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 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 14:33:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-02 14:33:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-10-02 14:33:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-02 14:33:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2019-10-02 14:33:50,857 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 139 [2019-10-02 14:33:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:50,857 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2019-10-02 14:33:50,857 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 14:33:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2019-10-02 14:33:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 14:33:50,858 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:50,859 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 15, 10, 10, 9, 6, 6, 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, 1, 1, 1] [2019-10-02 14:33:50,859 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash -984570890, now seen corresponding path program 21 times [2019-10-02 14:33:50,859 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:50,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:50,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:50,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:50,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:50,871 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:50,872 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:50,872 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:50,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:33:51,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-02 14:33:51,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:51,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 14:33:51,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 426 proven. 36 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-02 14:33:51,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:51,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 14:33:51,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 14:33:51,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 14:33:51,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:33:51,068 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 9 states. [2019-10-02 14:33:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:51,098 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2019-10-02 14:33:51,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 14:33:51,099 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 141 [2019-10-02 14:33:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:51,100 INFO L225 Difference]: With dead ends: 122 [2019-10-02 14:33:51,101 INFO L226 Difference]: Without dead ends: 87 [2019-10-02 14:33:51,101 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 133 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 14:33:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-02 14:33:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-02 14:33:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-02 14:33:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2019-10-02 14:33:51,106 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 141 [2019-10-02 14:33:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:51,106 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2019-10-02 14:33:51,107 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 14:33:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2019-10-02 14:33:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-02 14:33:51,108 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:51,108 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 15, 10, 10, 9, 7, 7, 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, 1, 1, 1] [2019-10-02 14:33:51,108 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1085190932, now seen corresponding path program 22 times [2019-10-02 14:33:51,109 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:51,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:51,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:51,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:51,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:51,122 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:51,122 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:51,122 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:33:51,155 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:51,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:33:51,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:51,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 14:33:51,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 457 proven. 57 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2019-10-02 14:33:51,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:51,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 14:33:51,317 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 14:33:51,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 14:33:51,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:33:51,318 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 9 states. [2019-10-02 14:33:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:51,353 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2019-10-02 14:33:51,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 14:33:51,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 143 [2019-10-02 14:33:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:51,355 INFO L225 Difference]: With dead ends: 152 [2019-10-02 14:33:51,355 INFO L226 Difference]: Without dead ends: 99 [2019-10-02 14:33:51,355 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 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 14:33:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-02 14:33:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-10-02 14:33:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-02 14:33:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-10-02 14:33:51,361 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 143 [2019-10-02 14:33:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:51,362 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-10-02 14:33:51,362 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 14:33:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-10-02 14:33:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-02 14:33:51,363 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:51,363 INFO L411 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 10, 10, 7, 7, 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, 1, 1, 1] [2019-10-02 14:33:51,364 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1286717932, now seen corresponding path program 23 times [2019-10-02 14:33:51,364 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:51,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:51,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:51,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:51,378 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:51,378 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:51,379 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:51,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:33:51,437 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-02 14:33:51,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:51,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 14:33:51,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 1029 proven. 40 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:33:51,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:51,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 14:33:51,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 14:33:51,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 14:33:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:33:51,520 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2019-10-02 14:33:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:51,572 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2019-10-02 14:33:51,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 14:33:51,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 179 [2019-10-02 14:33:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:51,577 INFO L225 Difference]: With dead ends: 168 [2019-10-02 14:33:51,577 INFO L226 Difference]: Without dead ends: 103 [2019-10-02 14:33:51,577 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 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 14:33:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-02 14:33:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-10-02 14:33:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-02 14:33:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2019-10-02 14:33:51,587 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 179 [2019-10-02 14:33:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:51,588 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2019-10-02 14:33:51,588 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 14:33:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2019-10-02 14:33:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-10-02 14:33:51,589 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:51,589 INFO L411 BasicCegarLoop]: trace histogram [39, 39, 21, 18, 10, 10, 7, 7, 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, 1, 1, 1] [2019-10-02 14:33:51,589 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:51,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1317645882, now seen corresponding path program 24 times [2019-10-02 14:33:51,590 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:51,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:51,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:51,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:51,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:51,614 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:51,615 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:51,615 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:33:51,639 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:52,509 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-10-02 14:33:52,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:52,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 14:33:52,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 1203 proven. 57 refuted. 0 times theorem prover too weak. 1244 trivial. 0 not checked. [2019-10-02 14:33:52,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:52,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 14:33:52,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 14:33:52,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 14:33:52,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:33:52,595 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 10 states. [2019-10-02 14:33:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:52,667 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2019-10-02 14:33:52,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 14:33:52,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 188 [2019-10-02 14:33:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:52,668 INFO L225 Difference]: With dead ends: 174 [2019-10-02 14:33:52,668 INFO L226 Difference]: Without dead ends: 106 [2019-10-02 14:33:52,669 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 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 14:33:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-02 14:33:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2019-10-02 14:33:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-02 14:33:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2019-10-02 14:33:52,673 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 188 [2019-10-02 14:33:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:52,673 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2019-10-02 14:33:52,673 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 14:33:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2019-10-02 14:33:52,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-02 14:33:52,674 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:52,674 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 21, 21, 10, 10, 7, 7, 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, 1, 1, 1] [2019-10-02 14:33:52,674 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:52,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2074958932, now seen corresponding path program 25 times [2019-10-02 14:33:52,675 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:52,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:52,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:52,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:52,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:52,688 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:52,689 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:52,689 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:33:52,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:52,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 14:33:52,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2773 trivial. 0 not checked. [2019-10-02 14:33:52,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:52,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 14:33:52,983 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 14:33:52,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 14:33:52,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:33:52,984 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand 13 states. [2019-10-02 14:33:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:53,024 INFO L93 Difference]: Finished difference Result 182 states and 206 transitions. [2019-10-02 14:33:53,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 14:33:53,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 197 [2019-10-02 14:33:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:53,026 INFO L225 Difference]: With dead ends: 182 [2019-10-02 14:33:53,026 INFO L226 Difference]: Without dead ends: 107 [2019-10-02 14:33:53,027 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:33:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-02 14:33:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-10-02 14:33:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-02 14:33:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2019-10-02 14:33:53,032 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 197 [2019-10-02 14:33:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:53,032 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2019-10-02 14:33:53,032 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 14:33:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2019-10-02 14:33:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-02 14:33:53,034 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:53,034 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 21, 21, 11, 11, 7, 7, 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, 1, 1, 1] [2019-10-02 14:33:53,034 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1356293074, now seen corresponding path program 26 times [2019-10-02 14:33:53,035 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:53,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:53,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:53,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:53,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:53,048 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:53,048 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:53,049 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:33:53,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:53,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:33:53,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:53,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-02 14:33:53,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2894 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2773 trivial. 0 not checked. [2019-10-02 14:33:53,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:53,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 14:33:53,276 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 14:33:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 14:33:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-02 14:33:53,277 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand 14 states. [2019-10-02 14:33:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:53,322 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2019-10-02 14:33:53,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 14:33:53,323 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 199 [2019-10-02 14:33:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:53,324 INFO L225 Difference]: With dead ends: 184 [2019-10-02 14:33:53,324 INFO L226 Difference]: Without dead ends: 109 [2019-10-02 14:33:53,325 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-02 14:33:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-02 14:33:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2019-10-02 14:33:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-02 14:33:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2019-10-02 14:33:53,330 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 199 [2019-10-02 14:33:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:53,331 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2019-10-02 14:33:53,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 14:33:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2019-10-02 14:33:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-02 14:33:53,332 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:53,332 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 21, 21, 12, 12, 7, 7, 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, 1, 1, 1] [2019-10-02 14:33:53,332 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2086829104, now seen corresponding path program 27 times [2019-10-02 14:33:53,333 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:53,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:53,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:53,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:53,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:53,346 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:53,347 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:53,347 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:53,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:33:54,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-02 14:33:54,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:54,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 14:33:54,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 1242 proven. 49 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2019-10-02 14:33:54,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:54,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 14:33:54,427 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 14:33:54,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 14:33:54,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:33:54,428 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand 10 states. [2019-10-02 14:33:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:54,462 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2019-10-02 14:33:54,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 14:33:54,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 201 [2019-10-02 14:33:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:54,465 INFO L225 Difference]: With dead ends: 164 [2019-10-02 14:33:54,465 INFO L226 Difference]: Without dead ends: 111 [2019-10-02 14:33:54,466 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 192 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 14:33:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-02 14:33:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2019-10-02 14:33:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-02 14:33:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2019-10-02 14:33:54,472 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 201 [2019-10-02 14:33:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:54,472 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2019-10-02 14:33:54,472 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 14:33:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2019-10-02 14:33:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-02 14:33:54,473 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:54,474 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 21, 21, 12, 12, 8, 8, 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, 1, 1, 1] [2019-10-02 14:33:54,474 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash -411825938, now seen corresponding path program 28 times [2019-10-02 14:33:54,474 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:54,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:54,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:54,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:54,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:54,488 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:54,488 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:54,489 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:54,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:33:54,595 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:33:54,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:54,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-02 14:33:54,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2932 backedges. 1857 proven. 260 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2019-10-02 14:33:54,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:54,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 14:33:54,765 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 14:33:54,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 14:33:54,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:33:54,766 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand 17 states. [2019-10-02 14:33:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:54,880 INFO L93 Difference]: Finished difference Result 206 states and 246 transitions. [2019-10-02 14:33:54,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 14:33:54,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 203 [2019-10-02 14:33:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:54,882 INFO L225 Difference]: With dead ends: 206 [2019-10-02 14:33:54,882 INFO L226 Difference]: Without dead ends: 133 [2019-10-02 14:33:54,883 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:33:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-02 14:33:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2019-10-02 14:33:54,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-02 14:33:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2019-10-02 14:33:54,889 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 203 [2019-10-02 14:33:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:54,889 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2019-10-02 14:33:54,889 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 14:33:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2019-10-02 14:33:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-10-02 14:33:54,891 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:54,891 INFO L411 BasicCegarLoop]: trace histogram [63, 63, 42, 21, 12, 12, 8, 8, 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, 1, 1, 1] [2019-10-02 14:33:54,891 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1062295916, now seen corresponding path program 29 times [2019-10-02 14:33:54,892 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:54,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:54,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:54,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:54,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:54,908 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:54,909 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:54,909 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:54,945 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:33:55,109 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-10-02 14:33:55,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:55,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 14:33:55,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6271 backedges. 3545 proven. 77 refuted. 0 times theorem prover too weak. 2649 trivial. 0 not checked. [2019-10-02 14:33:55,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:55,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 14:33:55,216 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 14:33:55,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 14:33:55,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:33:55,217 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 10 states. [2019-10-02 14:33:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:55,258 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2019-10-02 14:33:55,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 14:33:55,259 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 266 [2019-10-02 14:33:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:55,260 INFO L225 Difference]: With dead ends: 229 [2019-10-02 14:33:55,260 INFO L226 Difference]: Without dead ends: 135 [2019-10-02 14:33:55,261 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 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 14:33:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-02 14:33:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-10-02 14:33:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-02 14:33:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2019-10-02 14:33:55,273 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 266 [2019-10-02 14:33:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:55,273 INFO L475 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2019-10-02 14:33:55,273 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 14:33:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2019-10-02 14:33:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-10-02 14:33:55,278 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:55,278 INFO L411 BasicCegarLoop]: trace histogram [66, 66, 42, 24, 12, 12, 8, 8, 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, 1, 1, 1] [2019-10-02 14:33:55,279 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash -433504976, now seen corresponding path program 30 times [2019-10-02 14:33:55,282 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:55,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:55,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:55,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:55,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:55,311 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:55,311 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:55,311 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:55,354 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:33:57,562 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-02 14:33:57,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:57,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-02 14:33:57,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 3002 proven. 64 refuted. 0 times theorem prover too weak. 3790 trivial. 0 not checked. [2019-10-02 14:33:57,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:57,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 14:33:57,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 14:33:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 14:33:57,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 14:33:57,679 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand 11 states. [2019-10-02 14:33:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:57,727 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2019-10-02 14:33:57,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 14:33:57,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 275 [2019-10-02 14:33:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:57,730 INFO L225 Difference]: With dead ends: 214 [2019-10-02 14:33:57,731 INFO L226 Difference]: Without dead ends: 137 [2019-10-02 14:33:57,731 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 265 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 14:33:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-02 14:33:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-10-02 14:33:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-02 14:33:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2019-10-02 14:33:57,739 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 275 [2019-10-02 14:33:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:57,739 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2019-10-02 14:33:57,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 14:33:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2019-10-02 14:33:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2019-10-02 14:33:57,742 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:57,742 INFO L411 BasicCegarLoop]: trace histogram [66, 66, 42, 24, 12, 12, 9, 9, 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, 1, 1, 1] [2019-10-02 14:33:57,742 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash 341346510, now seen corresponding path program 31 times [2019-10-02 14:33:57,743 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:57,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:57,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:57,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:57,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:57,766 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:57,767 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:57,767 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:57,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:33:57,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-02 14:33:57,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6873 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 6729 trivial. 0 not checked. [2019-10-02 14:33:58,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:58,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-02 14:33:58,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 14:33:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 14:33:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-02 14:33:58,072 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand 15 states. [2019-10-02 14:33:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:58,114 INFO L93 Difference]: Finished difference Result 242 states and 280 transitions. [2019-10-02 14:33:58,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 14:33:58,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 277 [2019-10-02 14:33:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:58,116 INFO L225 Difference]: With dead ends: 242 [2019-10-02 14:33:58,116 INFO L226 Difference]: Without dead ends: 139 [2019-10-02 14:33:58,117 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-02 14:33:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-02 14:33:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-10-02 14:33:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-10-02 14:33:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2019-10-02 14:33:58,123 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 277 [2019-10-02 14:33:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:58,123 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2019-10-02 14:33:58,123 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 14:33:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2019-10-02 14:33:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-10-02 14:33:58,125 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:58,125 INFO L411 BasicCegarLoop]: trace histogram [66, 66, 42, 24, 13, 13, 9, 9, 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, 1, 1, 1] [2019-10-02 14:33:58,125 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash -761994164, now seen corresponding path program 32 times [2019-10-02 14:33:58,126 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:58,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:58,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:58,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:33:58,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:58,142 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:58,142 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:58,142 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:58,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:33:58,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:33:58,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:33:58,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-02 14:33:58,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:33:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6898 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 6729 trivial. 0 not checked. [2019-10-02 14:33:58,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:33:58,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-02 14:33:58,457 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-02 14:33:58,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-02 14:33:58,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-02 14:33:58,458 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand 16 states. [2019-10-02 14:33:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:33:58,511 INFO L93 Difference]: Finished difference Result 244 states and 282 transitions. [2019-10-02 14:33:58,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 14:33:58,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 279 [2019-10-02 14:33:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:33:58,512 INFO L225 Difference]: With dead ends: 244 [2019-10-02 14:33:58,512 INFO L226 Difference]: Without dead ends: 141 [2019-10-02 14:33:58,513 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-02 14:33:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-02 14:33:58,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-10-02 14:33:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-10-02 14:33:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2019-10-02 14:33:58,519 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 279 [2019-10-02 14:33:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:33:58,520 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2019-10-02 14:33:58,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-02 14:33:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2019-10-02 14:33:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-02 14:33:58,522 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:33:58,522 INFO L411 BasicCegarLoop]: trace histogram [66, 66, 42, 24, 14, 14, 9, 9, 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, 1, 1, 1] [2019-10-02 14:33:58,522 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:33:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:33:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash -215459766, now seen corresponding path program 33 times [2019-10-02 14:33:58,523 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:33:58,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:33:58,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:58,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:33:58,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:33:58,540 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:33:58,540 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:33:58,540 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:33:58,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:34:01,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-02 14:34:01,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:01,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-02 14:34:01,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6925 backedges. 3002 proven. 81 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2019-10-02 14:34:01,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:01,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 14:34:01,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 14:34:01,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 14:34:01,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:34:01,154 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand 12 states. [2019-10-02 14:34:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:01,189 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2019-10-02 14:34:01,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 14:34:01,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 281 [2019-10-02 14:34:01,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:01,190 INFO L225 Difference]: With dead ends: 220 [2019-10-02 14:34:01,191 INFO L226 Difference]: Without dead ends: 143 [2019-10-02 14:34:01,191 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 270 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 14:34:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-02 14:34:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-10-02 14:34:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-10-02 14:34:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 161 transitions. [2019-10-02 14:34:01,197 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 161 transitions. Word has length 281 [2019-10-02 14:34:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:01,197 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 161 transitions. [2019-10-02 14:34:01,197 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 14:34:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 161 transitions. [2019-10-02 14:34:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-10-02 14:34:01,199 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:01,200 INFO L411 BasicCegarLoop]: trace histogram [66, 66, 42, 24, 14, 14, 10, 10, 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, 1, 1, 1] [2019-10-02 14:34:01,200 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:01,200 INFO L82 PathProgramCache]: Analyzing trace with hash -570604184, now seen corresponding path program 34 times [2019-10-02 14:34:01,200 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:01,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:01,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:01,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:01,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:01,216 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:01,217 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:01,217 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:01,249 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:34:01,357 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:34:01,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:01,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-02 14:34:01,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6944 backedges. 3283 proven. 392 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2019-10-02 14:34:01,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:01,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-02 14:34:01,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 14:34:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 14:34:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:34:01,565 INFO L87 Difference]: Start difference. First operand 142 states and 161 transitions. Second operand 19 states. [2019-10-02 14:34:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:01,637 INFO L93 Difference]: Finished difference Result 271 states and 319 transitions. [2019-10-02 14:34:01,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 14:34:01,637 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 283 [2019-10-02 14:34:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:01,639 INFO L225 Difference]: With dead ends: 271 [2019-10-02 14:34:01,639 INFO L226 Difference]: Without dead ends: 170 [2019-10-02 14:34:01,640 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:34:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-02 14:34:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-10-02 14:34:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-02 14:34:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2019-10-02 14:34:01,652 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 283 [2019-10-02 14:34:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:01,652 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2019-10-02 14:34:01,652 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 14:34:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2019-10-02 14:34:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2019-10-02 14:34:01,655 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:01,655 INFO L411 BasicCegarLoop]: trace histogram [93, 93, 51, 42, 14, 14, 10, 10, 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, 1, 1, 1] [2019-10-02 14:34:01,655 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1837522252, now seen corresponding path program 35 times [2019-10-02 14:34:01,656 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:01,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:01,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:01,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:01,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:01,684 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:01,685 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:01,685 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:01,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:34:01,790 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-02 14:34:01,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:01,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-02 14:34:01,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13424 backedges. 6627 proven. 301 refuted. 0 times theorem prover too weak. 6496 trivial. 0 not checked. [2019-10-02 14:34:02,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:02,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-02 14:34:02,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-02 14:34:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-02 14:34:02,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:34:02,099 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand 18 states. [2019-10-02 14:34:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:02,203 INFO L93 Difference]: Finished difference Result 302 states and 344 transitions. [2019-10-02 14:34:02,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 14:34:02,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 364 [2019-10-02 14:34:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:02,205 INFO L225 Difference]: With dead ends: 302 [2019-10-02 14:34:02,205 INFO L226 Difference]: Without dead ends: 174 [2019-10-02 14:34:02,205 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:34:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-10-02 14:34:02,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2019-10-02 14:34:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-10-02 14:34:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 192 transitions. [2019-10-02 14:34:02,212 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 192 transitions. Word has length 364 [2019-10-02 14:34:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:02,212 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 192 transitions. [2019-10-02 14:34:02,212 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-02 14:34:02,212 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 192 transitions. [2019-10-02 14:34:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2019-10-02 14:34:02,214 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:02,215 INFO L411 BasicCegarLoop]: trace histogram [96, 96, 51, 45, 14, 14, 10, 10, 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, 1, 1, 1] [2019-10-02 14:34:02,215 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash -632410074, now seen corresponding path program 36 times [2019-10-02 14:34:02,215 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:02,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:02,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:02,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:02,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:02,232 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:02,232 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:02,232 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:02,261 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:34:03,083 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-10-02 14:34:03,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:03,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 14:34:03,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14279 backedges. 6282 proven. 100 refuted. 0 times theorem prover too weak. 7897 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:34:03,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:03,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 14:34:03,274 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 14:34:03,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 14:34:03,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:34:03,275 INFO L87 Difference]: Start difference. First operand 172 states and 192 transitions. Second operand 13 states. [2019-10-02 14:34:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:03,317 INFO L93 Difference]: Finished difference Result 282 states and 319 transitions. [2019-10-02 14:34:03,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 14:34:03,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 373 [2019-10-02 14:34:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:03,319 INFO L225 Difference]: With dead ends: 282 [2019-10-02 14:34:03,319 INFO L226 Difference]: Without dead ends: 175 [2019-10-02 14:34:03,319 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 361 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 14:34:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-02 14:34:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2019-10-02 14:34:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-10-02 14:34:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 194 transitions. [2019-10-02 14:34:03,328 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 194 transitions. Word has length 373 [2019-10-02 14:34:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:03,332 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 194 transitions. [2019-10-02 14:34:03,332 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 14:34:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 194 transitions. [2019-10-02 14:34:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2019-10-02 14:34:03,336 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:03,336 INFO L411 BasicCegarLoop]: trace histogram [96, 96, 51, 45, 14, 14, 11, 11, 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, 1, 1, 1] [2019-10-02 14:34:03,336 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -101026492, now seen corresponding path program 37 times [2019-10-02 14:34:03,337 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:03,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:03,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:03,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:03,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:03,361 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:03,362 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:03,362 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:03,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:34:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:34:03,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-02 14:34:03,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14300 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 14104 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:34:03,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:03,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 14:34:03,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 14:34:03,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 14:34:03,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:34:03,789 INFO L87 Difference]: Start difference. First operand 174 states and 194 transitions. Second operand 17 states. [2019-10-02 14:34:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:03,838 INFO L93 Difference]: Finished difference Result 314 states and 354 transitions. [2019-10-02 14:34:03,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 14:34:03,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 375 [2019-10-02 14:34:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:03,842 INFO L225 Difference]: With dead ends: 314 [2019-10-02 14:34:03,842 INFO L226 Difference]: Without dead ends: 177 [2019-10-02 14:34:03,843 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:34:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-02 14:34:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2019-10-02 14:34:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-10-02 14:34:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 196 transitions. [2019-10-02 14:34:03,850 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 196 transitions. Word has length 375 [2019-10-02 14:34:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:03,850 INFO L475 AbstractCegarLoop]: Abstraction has 176 states and 196 transitions. [2019-10-02 14:34:03,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 14:34:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 196 transitions. [2019-10-02 14:34:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2019-10-02 14:34:03,853 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:03,853 INFO L411 BasicCegarLoop]: trace histogram [96, 96, 51, 45, 15, 15, 11, 11, 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, 1, 1, 1] [2019-10-02 14:34:03,854 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1699774142, now seen corresponding path program 38 times [2019-10-02 14:34:03,854 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:03,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:03,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:03,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:34:03,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:03,873 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:03,873 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:03,874 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:03,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:34:04,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:34:04,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:04,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-02 14:34:04,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14329 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 14104 trivial. 0 not checked. [2019-10-02 14:34:04,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:04,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-02 14:34:04,290 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-02 14:34:04,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-02 14:34:04,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:34:04,290 INFO L87 Difference]: Start difference. First operand 176 states and 196 transitions. Second operand 18 states. [2019-10-02 14:34:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:04,346 INFO L93 Difference]: Finished difference Result 316 states and 356 transitions. [2019-10-02 14:34:04,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 14:34:04,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 377 [2019-10-02 14:34:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:04,348 INFO L225 Difference]: With dead ends: 316 [2019-10-02 14:34:04,348 INFO L226 Difference]: Without dead ends: 179 [2019-10-02 14:34:04,349 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:34:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-10-02 14:34:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-10-02 14:34:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-02 14:34:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2019-10-02 14:34:04,356 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 377 [2019-10-02 14:34:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:04,356 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2019-10-02 14:34:04,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-02 14:34:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2019-10-02 14:34:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2019-10-02 14:34:04,359 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:04,359 INFO L411 BasicCegarLoop]: trace histogram [96, 96, 51, 45, 16, 16, 11, 11, 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, 1, 1, 1] [2019-10-02 14:34:04,359 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:04,360 INFO L82 PathProgramCache]: Analyzing trace with hash -497973824, now seen corresponding path program 39 times [2019-10-02 14:34:04,360 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:04,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:04,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:04,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:04,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:04,378 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:04,378 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:04,378 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:04,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:34:05,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-10-02 14:34:05,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:05,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-02 14:34:05,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14360 backedges. 6282 proven. 121 refuted. 0 times theorem prover too weak. 7957 trivial. 0 not checked. [2019-10-02 14:34:05,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:05,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 14:34:05,924 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 14:34:05,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 14:34:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-02 14:34:05,925 INFO L87 Difference]: Start difference. First operand 178 states and 198 transitions. Second operand 14 states. [2019-10-02 14:34:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:05,986 INFO L93 Difference]: Finished difference Result 288 states and 325 transitions. [2019-10-02 14:34:05,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 14:34:05,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 379 [2019-10-02 14:34:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:05,989 INFO L225 Difference]: With dead ends: 288 [2019-10-02 14:34:05,990 INFO L226 Difference]: Without dead ends: 181 [2019-10-02 14:34:05,991 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-02 14:34:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-02 14:34:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2019-10-02 14:34:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-10-02 14:34:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 200 transitions. [2019-10-02 14:34:06,001 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 200 transitions. Word has length 379 [2019-10-02 14:34:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:06,002 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 200 transitions. [2019-10-02 14:34:06,002 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 14:34:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 200 transitions. [2019-10-02 14:34:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2019-10-02 14:34:06,007 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:06,007 INFO L411 BasicCegarLoop]: trace histogram [96, 96, 51, 45, 16, 16, 12, 12, 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, 1, 1, 1] [2019-10-02 14:34:06,008 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:06,008 INFO L82 PathProgramCache]: Analyzing trace with hash 243190878, now seen corresponding path program 40 times [2019-10-02 14:34:06,008 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:06,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:06,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:06,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:06,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:06,040 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:06,040 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:06,040 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:06,090 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:34:06,271 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:34:06,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:06,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-02 14:34:06,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14383 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 14127 trivial. 0 not checked. [2019-10-02 14:34:06,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:06,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-02 14:34:06,554 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 14:34:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 14:34:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:34:06,555 INFO L87 Difference]: Start difference. First operand 180 states and 200 transitions. Second operand 19 states. [2019-10-02 14:34:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:06,615 INFO L93 Difference]: Finished difference Result 322 states and 362 transitions. [2019-10-02 14:34:06,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 14:34:06,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 381 [2019-10-02 14:34:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:06,617 INFO L225 Difference]: With dead ends: 322 [2019-10-02 14:34:06,617 INFO L226 Difference]: Without dead ends: 183 [2019-10-02 14:34:06,618 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:34:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-10-02 14:34:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2019-10-02 14:34:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-10-02 14:34:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 202 transitions. [2019-10-02 14:34:06,625 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 202 transitions. Word has length 381 [2019-10-02 14:34:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:06,625 INFO L475 AbstractCegarLoop]: Abstraction has 182 states and 202 transitions. [2019-10-02 14:34:06,625 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 14:34:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 202 transitions. [2019-10-02 14:34:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2019-10-02 14:34:06,628 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:06,628 INFO L411 BasicCegarLoop]: trace histogram [96, 96, 51, 45, 17, 17, 12, 12, 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, 1, 1, 1] [2019-10-02 14:34:06,628 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash -194092580, now seen corresponding path program 41 times [2019-10-02 14:34:06,629 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:06,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:06,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:06,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:06,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:06,648 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:06,648 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:06,648 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:06,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:34:06,743 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-02 14:34:06,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:06,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-02 14:34:06,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14416 backedges. 7059 proven. 345 refuted. 0 times theorem prover too weak. 7012 trivial. 0 not checked. [2019-10-02 14:34:07,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:07,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-02 14:34:07,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 14:34:07,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 14:34:07,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:34:07,049 INFO L87 Difference]: Start difference. First operand 182 states and 202 transitions. Second operand 19 states. [2019-10-02 14:34:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:07,169 INFO L93 Difference]: Finished difference Result 322 states and 366 transitions. [2019-10-02 14:34:07,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 14:34:07,169 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 383 [2019-10-02 14:34:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:07,171 INFO L225 Difference]: With dead ends: 322 [2019-10-02 14:34:07,171 INFO L226 Difference]: Without dead ends: 187 [2019-10-02 14:34:07,172 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:34:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-10-02 14:34:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2019-10-02 14:34:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-10-02 14:34:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 206 transitions. [2019-10-02 14:34:07,179 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 206 transitions. Word has length 383 [2019-10-02 14:34:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:07,180 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 206 transitions. [2019-10-02 14:34:07,180 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 14:34:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 206 transitions. [2019-10-02 14:34:07,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-10-02 14:34:07,183 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:07,184 INFO L411 BasicCegarLoop]: trace histogram [99, 99, 51, 48, 17, 17, 12, 12, 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, 1, 1, 1] [2019-10-02 14:34:07,184 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:07,184 INFO L82 PathProgramCache]: Analyzing trace with hash -206834690, now seen corresponding path program 42 times [2019-10-02 14:34:07,185 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:07,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:07,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:07,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:07,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:07,203 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:07,203 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:07,203 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:07,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:34:10,897 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-10-02 14:34:10,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:10,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-02 14:34:10,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15298 backedges. 6676 proven. 144 refuted. 0 times theorem prover too weak. 8478 trivial. 0 not checked. [2019-10-02 14:34:11,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:11,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-02 14:34:11,204 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 14:34:11,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 14:34:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-02 14:34:11,205 INFO L87 Difference]: Start difference. First operand 185 states and 206 transitions. Second operand 15 states. [2019-10-02 14:34:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:11,256 INFO L93 Difference]: Finished difference Result 298 states and 337 transitions. [2019-10-02 14:34:11,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 14:34:11,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 392 [2019-10-02 14:34:11,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:11,258 INFO L225 Difference]: With dead ends: 298 [2019-10-02 14:34:11,258 INFO L226 Difference]: Without dead ends: 188 [2019-10-02 14:34:11,259 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-02 14:34:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-10-02 14:34:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2019-10-02 14:34:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-10-02 14:34:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 208 transitions. [2019-10-02 14:34:11,267 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 208 transitions. Word has length 392 [2019-10-02 14:34:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:11,267 INFO L475 AbstractCegarLoop]: Abstraction has 187 states and 208 transitions. [2019-10-02 14:34:11,268 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 14:34:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 208 transitions. [2019-10-02 14:34:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2019-10-02 14:34:11,271 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:11,272 INFO L411 BasicCegarLoop]: trace histogram [99, 99, 51, 48, 17, 17, 13, 13, 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, 1, 1, 1] [2019-10-02 14:34:11,272 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2111490656, now seen corresponding path program 43 times [2019-10-02 14:34:11,272 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:11,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:11,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:11,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:11,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:11,293 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:11,293 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:11,293 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:11,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:34:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:34:11,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-02 14:34:11,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 15323 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 15034 trivial. 0 not checked. [2019-10-02 14:34:11,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:11,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-02 14:34:11,717 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-02 14:34:11,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-02 14:34:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-02 14:34:11,717 INFO L87 Difference]: Start difference. First operand 187 states and 208 transitions. Second operand 20 states. [2019-10-02 14:34:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:11,782 INFO L93 Difference]: Finished difference Result 334 states and 376 transitions. [2019-10-02 14:34:11,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-02 14:34:11,783 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 394 [2019-10-02 14:34:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:11,784 INFO L225 Difference]: With dead ends: 334 [2019-10-02 14:34:11,784 INFO L226 Difference]: Without dead ends: 190 [2019-10-02 14:34:11,786 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-02 14:34:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-10-02 14:34:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2019-10-02 14:34:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-10-02 14:34:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 210 transitions. [2019-10-02 14:34:11,797 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 210 transitions. Word has length 394 [2019-10-02 14:34:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:11,798 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 210 transitions. [2019-10-02 14:34:11,798 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-02 14:34:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 210 transitions. [2019-10-02 14:34:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-10-02 14:34:11,801 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:11,801 INFO L411 BasicCegarLoop]: trace histogram [99, 99, 51, 48, 18, 18, 13, 13, 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, 1, 1, 1] [2019-10-02 14:34:11,801 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash 974716130, now seen corresponding path program 44 times [2019-10-02 14:34:11,802 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:11,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:11,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:11,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:34:11,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:11,822 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:11,822 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:11,822 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:11,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:34:12,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:34:12,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:12,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-02 14:34:12,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15358 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 15034 trivial. 0 not checked. [2019-10-02 14:34:12,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:12,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-02 14:34:12,303 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-02 14:34:12,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-02 14:34:12,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-02 14:34:12,303 INFO L87 Difference]: Start difference. First operand 189 states and 210 transitions. Second operand 21 states. [2019-10-02 14:34:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:12,375 INFO L93 Difference]: Finished difference Result 336 states and 378 transitions. [2019-10-02 14:34:12,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-02 14:34:12,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 396 [2019-10-02 14:34:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:12,376 INFO L225 Difference]: With dead ends: 336 [2019-10-02 14:34:12,377 INFO L226 Difference]: Without dead ends: 192 [2019-10-02 14:34:12,378 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-02 14:34:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-10-02 14:34:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2019-10-02 14:34:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-10-02 14:34:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 212 transitions. [2019-10-02 14:34:12,384 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 212 transitions. Word has length 396 [2019-10-02 14:34:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:12,385 INFO L475 AbstractCegarLoop]: Abstraction has 191 states and 212 transitions. [2019-10-02 14:34:12,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-02 14:34:12,385 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 212 transitions. [2019-10-02 14:34:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2019-10-02 14:34:12,387 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:12,388 INFO L411 BasicCegarLoop]: trace histogram [99, 99, 51, 48, 19, 19, 13, 13, 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, 1, 1, 1] [2019-10-02 14:34:12,388 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1002964060, now seen corresponding path program 45 times [2019-10-02 14:34:12,388 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:12,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:12,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:12,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:12,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:12,406 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:12,407 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:12,407 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:12,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:34:15,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-02 14:34:15,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:15,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-02 14:34:15,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 15395 backedges. 6676 proven. 169 refuted. 0 times theorem prover too weak. 8550 trivial. 0 not checked. [2019-10-02 14:34:15,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:15,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-02 14:34:15,323 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-02 14:34:15,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-02 14:34:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-02 14:34:15,324 INFO L87 Difference]: Start difference. First operand 191 states and 212 transitions. Second operand 16 states. [2019-10-02 14:34:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:15,373 INFO L93 Difference]: Finished difference Result 304 states and 343 transitions. [2019-10-02 14:34:15,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 14:34:15,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 398 [2019-10-02 14:34:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:15,375 INFO L225 Difference]: With dead ends: 304 [2019-10-02 14:34:15,375 INFO L226 Difference]: Without dead ends: 194 [2019-10-02 14:34:15,376 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-02 14:34:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-10-02 14:34:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2019-10-02 14:34:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-10-02 14:34:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2019-10-02 14:34:15,382 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 398 [2019-10-02 14:34:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:15,383 INFO L475 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2019-10-02 14:34:15,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-02 14:34:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2019-10-02 14:34:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-10-02 14:34:15,386 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:15,386 INFO L411 BasicCegarLoop]: trace histogram [99, 99, 51, 48, 19, 19, 14, 14, 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, 1, 1, 1] [2019-10-02 14:34:15,386 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1607330758, now seen corresponding path program 46 times [2019-10-02 14:34:15,387 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:15,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:15,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:15,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:15,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:15,406 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:15,407 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:15,407 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:15,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:34:15,585 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:34:15,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:15,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-02 14:34:15,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15422 backedges. 10010 proven. 1617 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2019-10-02 14:34:16,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:16,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-02 14:34:16,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-02 14:34:16,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-02 14:34:16,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-10-02 14:34:16,247 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand 36 states. [2019-10-02 14:34:16,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:16,437 INFO L93 Difference]: Finished difference Result 347 states and 394 transitions. [2019-10-02 14:34:16,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-02 14:34:16,440 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 400 [2019-10-02 14:34:16,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:16,441 INFO L225 Difference]: With dead ends: 347 [2019-10-02 14:34:16,441 INFO L226 Difference]: Without dead ends: 205 [2019-10-02 14:34:16,442 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-10-02 14:34:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-10-02 14:34:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2019-10-02 14:34:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-10-02 14:34:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2019-10-02 14:34:16,449 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 400 [2019-10-02 14:34:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:16,449 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2019-10-02 14:34:16,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-02 14:34:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2019-10-02 14:34:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2019-10-02 14:34:16,453 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:16,453 INFO L411 BasicCegarLoop]: trace histogram [111, 111, 63, 48, 19, 19, 14, 14, 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, 1, 1, 1] [2019-10-02 14:34:16,453 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1396090310, now seen corresponding path program 47 times [2019-10-02 14:34:16,454 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:16,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:16,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:16,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:16,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:16,473 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:16,473 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:16,473 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:16,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:34:16,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-02 14:34:16,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:16,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-02 14:34:16,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19220 backedges. 9399 proven. 392 refuted. 0 times theorem prover too weak. 9429 trivial. 0 not checked. [2019-10-02 14:34:16,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:16,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-02 14:34:16,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-02 14:34:16,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-02 14:34:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-02 14:34:16,858 INFO L87 Difference]: Start difference. First operand 205 states and 226 transitions. Second operand 20 states. [2019-10-02 14:34:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:17,005 INFO L93 Difference]: Finished difference Result 364 states and 410 transitions. [2019-10-02 14:34:17,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-02 14:34:17,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 436 [2019-10-02 14:34:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:17,007 INFO L225 Difference]: With dead ends: 364 [2019-10-02 14:34:17,007 INFO L226 Difference]: Without dead ends: 210 [2019-10-02 14:34:17,008 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-02 14:34:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-10-02 14:34:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2019-10-02 14:34:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-10-02 14:34:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 230 transitions. [2019-10-02 14:34:17,015 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 230 transitions. Word has length 436 [2019-10-02 14:34:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:17,015 INFO L475 AbstractCegarLoop]: Abstraction has 208 states and 230 transitions. [2019-10-02 14:34:17,015 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-02 14:34:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 230 transitions. [2019-10-02 14:34:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2019-10-02 14:34:17,018 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:17,019 INFO L411 BasicCegarLoop]: trace histogram [114, 114, 63, 51, 19, 19, 14, 14, 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, 1, 1, 1] [2019-10-02 14:34:17,019 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2137547348, now seen corresponding path program 48 times [2019-10-02 14:34:17,019 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:17,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:17,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:17,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:17,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:17,038 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:17,038 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:17,039 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:17,083 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:34:21,078 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-02 14:34:21,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:21,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-02 14:34:21,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20237 backedges. 8826 proven. 196 refuted. 0 times theorem prover too weak. 11215 trivial. 0 not checked. [2019-10-02 14:34:21,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:21,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 14:34:21,272 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 14:34:21,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 14:34:21,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:34:21,273 INFO L87 Difference]: Start difference. First operand 208 states and 230 transitions. Second operand 17 states. [2019-10-02 14:34:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:21,321 INFO L93 Difference]: Finished difference Result 336 states and 377 transitions. [2019-10-02 14:34:21,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 14:34:21,322 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 445 [2019-10-02 14:34:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:21,324 INFO L225 Difference]: With dead ends: 336 [2019-10-02 14:34:21,325 INFO L226 Difference]: Without dead ends: 211 [2019-10-02 14:34:21,325 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:34:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-10-02 14:34:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2019-10-02 14:34:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-10-02 14:34:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2019-10-02 14:34:21,332 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 445 [2019-10-02 14:34:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:21,332 INFO L475 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2019-10-02 14:34:21,332 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 14:34:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2019-10-02 14:34:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2019-10-02 14:34:21,335 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:21,336 INFO L411 BasicCegarLoop]: trace histogram [114, 114, 63, 51, 19, 19, 15, 15, 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, 1, 1, 1] [2019-10-02 14:34:21,336 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1485658226, now seen corresponding path program 49 times [2019-10-02 14:34:21,337 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:21,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:21,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:21,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:21,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:21,355 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:21,355 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:21,355 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:21,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:34:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:34:21,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-02 14:34:21,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20266 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 19905 trivial. 0 not checked. [2019-10-02 14:34:21,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:21,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-02 14:34:21,871 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-02 14:34:21,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-02 14:34:21,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-02 14:34:21,872 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand 22 states. [2019-10-02 14:34:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:21,933 INFO L93 Difference]: Finished difference Result 376 states and 420 transitions. [2019-10-02 14:34:21,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-02 14:34:21,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 447 [2019-10-02 14:34:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:21,934 INFO L225 Difference]: With dead ends: 376 [2019-10-02 14:34:21,934 INFO L226 Difference]: Without dead ends: 213 [2019-10-02 14:34:21,935 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-02 14:34:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-10-02 14:34:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2019-10-02 14:34:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-02 14:34:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 234 transitions. [2019-10-02 14:34:21,941 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 234 transitions. Word has length 447 [2019-10-02 14:34:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:21,942 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 234 transitions. [2019-10-02 14:34:21,942 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-02 14:34:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 234 transitions. [2019-10-02 14:34:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2019-10-02 14:34:21,945 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:21,945 INFO L411 BasicCegarLoop]: trace histogram [114, 114, 63, 51, 20, 20, 15, 15, 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, 1, 1, 1] [2019-10-02 14:34:21,945 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:21,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1291753072, now seen corresponding path program 50 times [2019-10-02 14:34:21,946 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:21,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:21,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:21,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:34:21,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:21,965 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:21,965 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:21,965 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:22,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:34:22,163 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:34:22,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:22,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-02 14:34:22,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20305 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 19905 trivial. 0 not checked. [2019-10-02 14:34:22,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:22,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-02 14:34:22,484 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-02 14:34:22,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-02 14:34:22,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-02 14:34:22,485 INFO L87 Difference]: Start difference. First operand 212 states and 234 transitions. Second operand 23 states. [2019-10-02 14:34:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:22,556 INFO L93 Difference]: Finished difference Result 378 states and 422 transitions. [2019-10-02 14:34:22,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-02 14:34:22,557 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 449 [2019-10-02 14:34:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:22,558 INFO L225 Difference]: With dead ends: 378 [2019-10-02 14:34:22,558 INFO L226 Difference]: Without dead ends: 215 [2019-10-02 14:34:22,559 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-02 14:34:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-10-02 14:34:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2019-10-02 14:34:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-10-02 14:34:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 236 transitions. [2019-10-02 14:34:22,565 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 236 transitions. Word has length 449 [2019-10-02 14:34:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:22,566 INFO L475 AbstractCegarLoop]: Abstraction has 214 states and 236 transitions. [2019-10-02 14:34:22,566 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-02 14:34:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 236 transitions. [2019-10-02 14:34:22,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2019-10-02 14:34:22,569 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:22,569 INFO L411 BasicCegarLoop]: trace histogram [114, 114, 63, 51, 21, 21, 15, 15, 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, 1, 1, 1] [2019-10-02 14:34:22,569 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:22,570 INFO L82 PathProgramCache]: Analyzing trace with hash -367506194, now seen corresponding path program 51 times [2019-10-02 14:34:22,570 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:22,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:22,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:22,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:22,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:22,589 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:22,589 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:22,590 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:22,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:34:26,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-10-02 14:34:26,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:26,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-02 14:34:26,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20346 backedges. 8826 proven. 225 refuted. 0 times theorem prover too weak. 11295 trivial. 0 not checked. [2019-10-02 14:34:26,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:26,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-02 14:34:26,663 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-02 14:34:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-02 14:34:26,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:34:26,663 INFO L87 Difference]: Start difference. First operand 214 states and 236 transitions. Second operand 18 states. [2019-10-02 14:34:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:26,716 INFO L93 Difference]: Finished difference Result 342 states and 383 transitions. [2019-10-02 14:34:26,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 14:34:26,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 451 [2019-10-02 14:34:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:26,718 INFO L225 Difference]: With dead ends: 342 [2019-10-02 14:34:26,719 INFO L226 Difference]: Without dead ends: 217 [2019-10-02 14:34:26,719 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:34:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-10-02 14:34:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2019-10-02 14:34:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-10-02 14:34:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 238 transitions. [2019-10-02 14:34:26,726 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 238 transitions. Word has length 451 [2019-10-02 14:34:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:26,726 INFO L475 AbstractCegarLoop]: Abstraction has 216 states and 238 transitions. [2019-10-02 14:34:26,727 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-02 14:34:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 238 transitions. [2019-10-02 14:34:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2019-10-02 14:34:26,729 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:26,730 INFO L411 BasicCegarLoop]: trace histogram [114, 114, 63, 51, 21, 21, 16, 16, 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, 1, 1, 1] [2019-10-02 14:34:26,730 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash -689109876, now seen corresponding path program 52 times [2019-10-02 14:34:26,731 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:26,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:26,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:26,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:26,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:26,751 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:26,751 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:26,751 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:26,805 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:34:26,986 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:34:26,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:26,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-02 14:34:26,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20377 backedges. 13235 proven. 2147 refuted. 0 times theorem prover too weak. 4995 trivial. 0 not checked. [2019-10-02 14:34:27,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:27,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-02 14:34:27,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-02 14:34:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-02 14:34:27,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-10-02 14:34:27,837 INFO L87 Difference]: Start difference. First operand 216 states and 238 transitions. Second operand 41 states. [2019-10-02 14:34:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:28,071 INFO L93 Difference]: Finished difference Result 382 states and 430 transitions. [2019-10-02 14:34:28,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-02 14:34:28,071 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 453 [2019-10-02 14:34:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:28,072 INFO L225 Difference]: With dead ends: 382 [2019-10-02 14:34:28,072 INFO L226 Difference]: Without dead ends: 221 [2019-10-02 14:34:28,073 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-10-02 14:34:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-10-02 14:34:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2019-10-02 14:34:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-10-02 14:34:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 242 transitions. [2019-10-02 14:34:28,080 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 242 transitions. Word has length 453 [2019-10-02 14:34:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:28,081 INFO L475 AbstractCegarLoop]: Abstraction has 219 states and 242 transitions. [2019-10-02 14:34:28,081 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-02 14:34:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 242 transitions. [2019-10-02 14:34:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2019-10-02 14:34:28,084 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:28,085 INFO L411 BasicCegarLoop]: trace histogram [117, 117, 63, 54, 21, 21, 16, 16, 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, 1, 1, 1] [2019-10-02 14:34:28,085 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash 87622734, now seen corresponding path program 53 times [2019-10-02 14:34:28,085 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:28,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:28,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:28,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:28,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:28,105 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:28,105 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:28,105 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:28,167 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:34:28,247 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-10-02 14:34:28,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:28,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-02 14:34:28,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21421 backedges. 10443 proven. 495 refuted. 0 times theorem prover too weak. 10483 trivial. 0 not checked. [2019-10-02 14:34:28,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:28,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-02 14:34:28,578 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-02 14:34:28,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-02 14:34:28,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-02 14:34:28,579 INFO L87 Difference]: Start difference. First operand 219 states and 242 transitions. Second operand 22 states. [2019-10-02 14:34:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:28,709 INFO L93 Difference]: Finished difference Result 386 states and 435 transitions. [2019-10-02 14:34:28,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-02 14:34:28,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 462 [2019-10-02 14:34:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:28,710 INFO L225 Difference]: With dead ends: 386 [2019-10-02 14:34:28,710 INFO L226 Difference]: Without dead ends: 222 [2019-10-02 14:34:28,711 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-02 14:34:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-10-02 14:34:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2019-10-02 14:34:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-10-02 14:34:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 246 transitions. [2019-10-02 14:34:28,718 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 246 transitions. Word has length 462 [2019-10-02 14:34:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:28,718 INFO L475 AbstractCegarLoop]: Abstraction has 222 states and 246 transitions. [2019-10-02 14:34:28,718 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-02 14:34:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 246 transitions. [2019-10-02 14:34:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2019-10-02 14:34:28,722 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:28,722 INFO L411 BasicCegarLoop]: trace histogram [120, 120, 63, 57, 21, 21, 16, 16, 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, 1, 1, 1] [2019-10-02 14:34:28,722 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1809528372, now seen corresponding path program 54 times [2019-10-02 14:34:28,723 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:28,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:28,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:28,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:28,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:28,743 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:28,743 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:28,743 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:28,795 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:34:31,561 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-10-02 14:34:31,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:31,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-02 14:34:31,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 22492 backedges. 9770 proven. 256 refuted. 0 times theorem prover too weak. 12466 trivial. 0 not checked. [2019-10-02 14:34:31,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:31,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-02 14:34:31,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 14:34:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 14:34:31,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:34:31,807 INFO L87 Difference]: Start difference. First operand 222 states and 246 transitions. Second operand 19 states. [2019-10-02 14:34:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:31,862 INFO L93 Difference]: Finished difference Result 356 states and 401 transitions. [2019-10-02 14:34:31,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 14:34:31,863 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 471 [2019-10-02 14:34:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:31,864 INFO L225 Difference]: With dead ends: 356 [2019-10-02 14:34:31,864 INFO L226 Difference]: Without dead ends: 225 [2019-10-02 14:34:31,865 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:34:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-10-02 14:34:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2019-10-02 14:34:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-10-02 14:34:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 248 transitions. [2019-10-02 14:34:31,872 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 248 transitions. Word has length 471 [2019-10-02 14:34:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:31,872 INFO L475 AbstractCegarLoop]: Abstraction has 224 states and 248 transitions. [2019-10-02 14:34:31,872 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 14:34:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 248 transitions. [2019-10-02 14:34:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2019-10-02 14:34:31,875 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:31,876 INFO L411 BasicCegarLoop]: trace histogram [120, 120, 63, 57, 21, 21, 17, 17, 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, 1, 1, 1] [2019-10-02 14:34:31,876 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:31,876 INFO L82 PathProgramCache]: Analyzing trace with hash -934075542, now seen corresponding path program 55 times [2019-10-02 14:34:31,877 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:31,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:31,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:31,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:31,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:31,896 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:31,896 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:31,897 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:31,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:34:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:34:32,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-02 14:34:32,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22525 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 22084 trivial. 0 not checked. [2019-10-02 14:34:32,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:32,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-02 14:34:32,468 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-02 14:34:32,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-02 14:34:32,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-02 14:34:32,468 INFO L87 Difference]: Start difference. First operand 224 states and 248 transitions. Second operand 24 states. [2019-10-02 14:34:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:32,542 INFO L93 Difference]: Finished difference Result 400 states and 448 transitions. [2019-10-02 14:34:32,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-02 14:34:32,542 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 473 [2019-10-02 14:34:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:32,543 INFO L225 Difference]: With dead ends: 400 [2019-10-02 14:34:32,543 INFO L226 Difference]: Without dead ends: 227 [2019-10-02 14:34:32,544 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-02 14:34:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-10-02 14:34:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2019-10-02 14:34:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-10-02 14:34:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2019-10-02 14:34:32,551 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 473 [2019-10-02 14:34:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:32,551 INFO L475 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2019-10-02 14:34:32,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-02 14:34:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2019-10-02 14:34:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2019-10-02 14:34:32,554 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:32,555 INFO L411 BasicCegarLoop]: trace histogram [120, 120, 63, 57, 22, 22, 17, 17, 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, 1, 1, 1] [2019-10-02 14:34:32,555 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:32,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1357955048, now seen corresponding path program 56 times [2019-10-02 14:34:32,555 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:32,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:32,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:32,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:34:32,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:32,575 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:32,575 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:32,575 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:32,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:34:32,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:34:32,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:32,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-02 14:34:32,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 22568 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 22084 trivial. 0 not checked. [2019-10-02 14:34:33,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:33,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-02 14:34:33,170 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-02 14:34:33,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-02 14:34:33,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-02 14:34:33,171 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand 25 states. [2019-10-02 14:34:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:33,236 INFO L93 Difference]: Finished difference Result 402 states and 450 transitions. [2019-10-02 14:34:33,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-02 14:34:33,237 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 475 [2019-10-02 14:34:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:33,239 INFO L225 Difference]: With dead ends: 402 [2019-10-02 14:34:33,239 INFO L226 Difference]: Without dead ends: 229 [2019-10-02 14:34:33,240 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-02 14:34:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-10-02 14:34:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2019-10-02 14:34:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-10-02 14:34:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 252 transitions. [2019-10-02 14:34:33,252 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 252 transitions. Word has length 475 [2019-10-02 14:34:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:33,252 INFO L475 AbstractCegarLoop]: Abstraction has 228 states and 252 transitions. [2019-10-02 14:34:33,252 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-02 14:34:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 252 transitions. [2019-10-02 14:34:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2019-10-02 14:34:33,257 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:33,257 INFO L411 BasicCegarLoop]: trace histogram [120, 120, 63, 57, 23, 23, 17, 17, 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, 1, 1, 1] [2019-10-02 14:34:33,257 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:33,258 INFO L82 PathProgramCache]: Analyzing trace with hash 681129190, now seen corresponding path program 57 times [2019-10-02 14:34:33,258 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:33,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:33,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:33,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:33,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:33,295 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:33,295 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:33,295 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:33,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:34:45,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-10-02 14:34:45,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:45,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-02 14:34:45,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22613 backedges. 9770 proven. 289 refuted. 0 times theorem prover too weak. 12554 trivial. 0 not checked. [2019-10-02 14:34:46,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:46,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-02 14:34:46,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-02 14:34:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-02 14:34:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-02 14:34:46,204 INFO L87 Difference]: Start difference. First operand 228 states and 252 transitions. Second operand 20 states. [2019-10-02 14:34:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:46,262 INFO L93 Difference]: Finished difference Result 362 states and 407 transitions. [2019-10-02 14:34:46,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-02 14:34:46,262 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 477 [2019-10-02 14:34:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:46,263 INFO L225 Difference]: With dead ends: 362 [2019-10-02 14:34:46,264 INFO L226 Difference]: Without dead ends: 231 [2019-10-02 14:34:46,264 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-02 14:34:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-10-02 14:34:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2019-10-02 14:34:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-10-02 14:34:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 254 transitions. [2019-10-02 14:34:46,270 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 254 transitions. Word has length 477 [2019-10-02 14:34:46,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:46,271 INFO L475 AbstractCegarLoop]: Abstraction has 230 states and 254 transitions. [2019-10-02 14:34:46,271 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-02 14:34:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 254 transitions. [2019-10-02 14:34:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2019-10-02 14:34:46,274 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:46,275 INFO L411 BasicCegarLoop]: trace histogram [120, 120, 63, 57, 23, 23, 18, 18, 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, 1, 1, 1] [2019-10-02 14:34:46,275 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash 291057668, now seen corresponding path program 58 times [2019-10-02 14:34:46,276 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:46,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:46,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:46,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:46,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:46,296 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:46,296 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:46,297 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:46,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:34:46,515 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:34:46,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:34:46,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-02 14:34:46,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:34:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22648 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 22119 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:34:47,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:34:47,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-02 14:34:47,169 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-02 14:34:47,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-02 14:34:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-02 14:34:47,173 INFO L87 Difference]: Start difference. First operand 230 states and 254 transitions. Second operand 26 states. [2019-10-02 14:34:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:34:47,282 INFO L93 Difference]: Finished difference Result 408 states and 456 transitions. [2019-10-02 14:34:47,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-02 14:34:47,283 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 479 [2019-10-02 14:34:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:34:47,285 INFO L225 Difference]: With dead ends: 408 [2019-10-02 14:34:47,285 INFO L226 Difference]: Without dead ends: 233 [2019-10-02 14:34:47,287 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-02 14:34:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-10-02 14:34:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2019-10-02 14:34:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-02 14:34:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 256 transitions. [2019-10-02 14:34:47,296 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 256 transitions. Word has length 479 [2019-10-02 14:34:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:34:47,297 INFO L475 AbstractCegarLoop]: Abstraction has 232 states and 256 transitions. [2019-10-02 14:34:47,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-02 14:34:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 256 transitions. [2019-10-02 14:34:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2019-10-02 14:34:47,301 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:34:47,302 INFO L411 BasicCegarLoop]: trace histogram [120, 120, 63, 57, 24, 24, 18, 18, 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, 1, 1, 1] [2019-10-02 14:34:47,302 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:34:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:34:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1168307714, now seen corresponding path program 59 times [2019-10-02 14:34:47,303 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:34:47,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:34:47,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:47,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:34:47,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:34:47,329 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:34:47,329 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:34:47,330 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:34:47,379 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1