java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 23:57:26,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 23:57:26,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 23:57:26,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 23:57:26,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 23:57:26,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 23:57:26,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 23:57:26,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 23:57:26,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 23:57:26,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 23:57:26,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 23:57:26,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 23:57:26,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 23:57:26,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 23:57:26,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 23:57:26,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 23:57:26,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 23:57:26,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 23:57:26,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 23:57:26,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 23:57:26,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 23:57:26,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 23:57:26,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 23:57:26,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 23:57:26,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-01 23:57:26,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-01 23:57:26,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-01 23:57:26,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-01 23:57:26,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-01 23:57:26,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-01 23:57:26,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-01 23:57:26,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-01 23:57:26,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-01 23:57:26,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-01 23:57:26,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-01 23:57:26,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-01 23:57:26,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-01 23:57:26,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-01 23:57:26,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 23:57:26,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 23:57:26,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 23:57:26,114 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 [2019-10-01 23:57:26,141 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 23:57:26,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 23:57:26,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 23:57:26,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 23:57:26,143 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 23:57:26,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 23:57:26,144 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 23:57:26,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 23:57:26,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 23:57:26,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 23:57:26,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 23:57:26,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 23:57:26,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 23:57:26,146 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 23:57:26,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 23:57:26,146 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 23:57:26,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 23:57:26,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 23:57:26,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 23:57:26,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 23:57:26,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 23:57:26,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 23:57:26,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 23:57:26,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 23:57:26,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 23:57:26,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 23:57:26,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 23:57:26,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 23:57:26,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 23:57:26,200 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 23:57:26,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 23:57:26,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 23:57:26,220 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 23:57:26,220 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 23:57:26,221 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-10-01 23:57:26,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c205701ba/32149328416f4b679e82cf62aea1e7bc/FLAG91fdf2738 [2019-10-01 23:57:26,708 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 23:57:26,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-10-01 23:57:26,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c205701ba/32149328416f4b679e82cf62aea1e7bc/FLAG91fdf2738 [2019-10-01 23:57:27,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c205701ba/32149328416f4b679e82cf62aea1e7bc [2019-10-01 23:57:27,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 23:57:27,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 23:57:27,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 23:57:27,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 23:57:27,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 23:57:27,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17644812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27, skipping insertion in model container [2019-10-01 23:57:27,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,107 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 23:57:27,124 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 23:57:27,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:57:27,334 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 23:57:27,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:57:27,464 INFO L192 MainTranslator]: Completed translation [2019-10-01 23:57:27,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27 WrapperNode [2019-10-01 23:57:27,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 23:57:27,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 23:57:27,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 23:57:27,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 23:57:27,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (1/1) ... [2019-10-01 23:57:27,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 23:57:27,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 23:57:27,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 23:57:27,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 23:57:27,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (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 [2019-10-01 23:57:27,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 23:57:27,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 23:57:27,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 23:57:27,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 23:57:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 23:57:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 23:57:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-01 23:57:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 23:57:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 23:57:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 23:57:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 23:57:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 23:57:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 23:57:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 23:57:27,910 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 23:57:27,910 INFO L283 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-01 23:57:27,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:57:27 BoogieIcfgContainer [2019-10-01 23:57:27,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 23:57:27,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 23:57:27,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 23:57:27,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 23:57:27,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 11:57:27" (1/3) ... [2019-10-01 23:57:27,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646e35f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:57:27, skipping insertion in model container [2019-10-01 23:57:27,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:27" (2/3) ... [2019-10-01 23:57:27,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646e35f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:57:27, skipping insertion in model container [2019-10-01 23:57:27,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:57:27" (3/3) ... [2019-10-01 23:57:27,920 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2019-10-01 23:57:27,927 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 23:57:27,934 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 23:57:27,951 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 23:57:27,981 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 23:57:27,981 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 23:57:27,982 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 23:57:27,982 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 23:57:27,982 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 23:57:27,982 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 23:57:27,982 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 23:57:27,982 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 23:57:27,982 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 23:57:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-10-01 23:57:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-01 23:57:28,008 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:28,009 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:28,011 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 94592989, now seen corresponding path program 1 times [2019-10-01 23:57:28,019 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:28,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:28,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:28,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:28,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:28,110 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:28,110 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:28,111 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-01 23:57:28,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:28,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:57:28,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:57:28,249 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:57:28,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 23:57:28,253 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 23:57:28,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 23:57:28,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:57:28,268 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2019-10-01 23:57:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:28,342 INFO L93 Difference]: Finished difference Result 65 states and 102 transitions. [2019-10-01 23:57:28,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 23:57:28,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-01 23:57:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:28,352 INFO L225 Difference]: With dead ends: 65 [2019-10-01 23:57:28,353 INFO L226 Difference]: Without dead ends: 32 [2019-10-01 23:57:28,356 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:57:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-01 23:57:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-01 23:57:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-01 23:57:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-10-01 23:57:28,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2019-10-01 23:57:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:28,395 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-10-01 23:57:28,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 23:57:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-10-01 23:57:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-01 23:57:28,397 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:28,397 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:28,397 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1982042687, now seen corresponding path program 1 times [2019-10-01 23:57:28,398 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:28,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:28,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:28,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:28,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:28,409 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:28,409 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:28,410 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) [2019-10-01 23:57:28,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:28,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:57:28,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:57:28,503 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:57:28,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 23:57:28,505 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:57:28,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:57:28,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:28,506 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-10-01 23:57:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:28,610 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2019-10-01 23:57:28,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:57:28,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-01 23:57:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:28,614 INFO L225 Difference]: With dead ends: 64 [2019-10-01 23:57:28,614 INFO L226 Difference]: Without dead ends: 41 [2019-10-01 23:57:28,615 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-01 23:57:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2019-10-01 23:57:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-01 23:57:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-01 23:57:28,628 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2019-10-01 23:57:28,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:28,629 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-01 23:57:28,629 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:57:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-01 23:57:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-01 23:57:28,630 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:28,630 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:28,631 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:28,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1652526196, now seen corresponding path program 1 times [2019-10-01 23:57:28,631 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:28,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:28,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:28,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:28,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:28,644 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:28,644 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:28,645 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) [2019-10-01 23:57:28,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:28,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:57:28,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:57:28,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:57:28,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-01 23:57:28,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:57:28,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:57:28,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:57:28,773 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-10-01 23:57:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:28,908 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-10-01 23:57:28,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:57:28,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-01 23:57:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:28,910 INFO L225 Difference]: With dead ends: 74 [2019-10-01 23:57:28,910 INFO L226 Difference]: Without dead ends: 47 [2019-10-01 23:57:28,911 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:57:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-01 23:57:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-10-01 23:57:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-01 23:57:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-10-01 23:57:28,921 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2019-10-01 23:57:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:28,921 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-10-01 23:57:28,921 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:57:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-10-01 23:57:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 23:57:28,922 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:28,922 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:28,923 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:28,923 INFO L82 PathProgramCache]: Analyzing trace with hash -27449567, now seen corresponding path program 2 times [2019-10-01 23:57:28,923 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:28,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:28,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:28,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:28,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:28,931 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:28,932 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:28,932 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-01 23:57:28,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:28,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-01 23:57:28,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:57:28,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:57:28,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-01 23:57:29,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:57:29,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 23:57:29,011 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:57:29,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:57:29,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:29,012 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2019-10-01 23:57:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:29,098 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2019-10-01 23:57:29,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:57:29,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-01 23:57:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:29,100 INFO L225 Difference]: With dead ends: 85 [2019-10-01 23:57:29,100 INFO L226 Difference]: Without dead ends: 63 [2019-10-01 23:57:29,101 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-01 23:57:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-10-01 23:57:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-01 23:57:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-10-01 23:57:29,111 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2019-10-01 23:57:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:29,111 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-10-01 23:57:29,111 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:57:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-10-01 23:57:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-01 23:57:29,112 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:29,112 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:29,113 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash 24575093, now seen corresponding path program 1 times [2019-10-01 23:57:29,113 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:29,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:29,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:57:29,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,122 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:29,122 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:29,122 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:29,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:29,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:57:29,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-01 23:57:29,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:57:29,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-01 23:57:29,239 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 23:57:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 23:57:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:57:29,240 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 6 states. [2019-10-01 23:57:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:29,348 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-10-01 23:57:29,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:57:29,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-01 23:57:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:29,350 INFO L225 Difference]: With dead ends: 86 [2019-10-01 23:57:29,350 INFO L226 Difference]: Without dead ends: 51 [2019-10-01 23:57:29,351 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:57:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-01 23:57:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-10-01 23:57:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-01 23:57:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2019-10-01 23:57:29,360 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 33 [2019-10-01 23:57:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:29,361 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2019-10-01 23:57:29,361 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 23:57:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2019-10-01 23:57:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-01 23:57:29,362 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:29,363 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-01 23:57:29,363 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2136339146, now seen corresponding path program 2 times [2019-10-01 23:57:29,363 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:29,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:29,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:29,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,372 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:29,372 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:29,372 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 [2019-10-01 23:57:29,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:57:29,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:57:29,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:57:29,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 23:57:29,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-01 23:57:29,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:57:29,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-01 23:57:29,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 23:57:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 23:57:29,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:57:29,486 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 7 states. [2019-10-01 23:57:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:29,607 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2019-10-01 23:57:29,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 23:57:29,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-10-01 23:57:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:29,609 INFO L225 Difference]: With dead ends: 98 [2019-10-01 23:57:29,609 INFO L226 Difference]: Without dead ends: 57 [2019-10-01 23:57:29,610 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:57:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-01 23:57:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-10-01 23:57:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-01 23:57:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-10-01 23:57:29,621 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 36 [2019-10-01 23:57:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:29,622 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-10-01 23:57:29,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 23:57:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-10-01 23:57:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-01 23:57:29,623 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:29,623 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:29,624 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:29,624 INFO L82 PathProgramCache]: Analyzing trace with hash 6847317, now seen corresponding path program 3 times [2019-10-01 23:57:29,624 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:29,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:29,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:57:29,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,633 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:29,634 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:29,634 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 [2019-10-01 23:57:29,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:57:29,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-01 23:57:29,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:57:29,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:57:29,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-01 23:57:29,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:57:29,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-01 23:57:29,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:57:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:57:29,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:57:29,733 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 5 states. [2019-10-01 23:57:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:29,842 INFO L93 Difference]: Finished difference Result 163 states and 200 transitions. [2019-10-01 23:57:29,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:57:29,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-01 23:57:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:29,844 INFO L225 Difference]: With dead ends: 163 [2019-10-01 23:57:29,844 INFO L226 Difference]: Without dead ends: 123 [2019-10-01 23:57:29,845 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:57:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-01 23:57:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 75. [2019-10-01 23:57:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-01 23:57:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2019-10-01 23:57:29,861 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 39 [2019-10-01 23:57:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:29,862 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2019-10-01 23:57:29,862 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:57:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2019-10-01 23:57:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-01 23:57:29,864 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:29,864 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:29,864 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash -763208995, now seen corresponding path program 4 times [2019-10-01 23:57:29,865 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:29,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:29,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:57:29,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,874 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:29,874 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:29,874 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-01 23:57:29,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:59:24,189 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:59:24,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:59:24,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:59:24,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:59:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-01 23:59:24,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:59:24,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-01 23:59:24,306 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 23:59:24,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 23:59:24,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:59:24,307 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 6 states. [2019-10-01 23:59:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:59:24,456 INFO L93 Difference]: Finished difference Result 213 states and 260 transitions. [2019-10-01 23:59:24,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:59:24,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2019-10-01 23:59:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:59:24,458 INFO L225 Difference]: With dead ends: 213 [2019-10-01 23:59:24,458 INFO L226 Difference]: Without dead ends: 159 [2019-10-01 23:59:24,459 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:59:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-01 23:59:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 96. [2019-10-01 23:59:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-01 23:59:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2019-10-01 23:59:24,490 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 60 [2019-10-01 23:59:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:59:24,491 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2019-10-01 23:59:24,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 23:59:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2019-10-01 23:59:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-01 23:59:24,495 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:59:24,495 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 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] [2019-10-01 23:59:24,496 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:59:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:59:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1240955307, now seen corresponding path program 5 times [2019-10-01 23:59:24,497 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:59:24,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:59:24,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:59:24,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:59:24,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:59:24,513 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:59:24,513 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:59:24,513 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:59:24,535 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1