/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/max-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:32:42,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:32:42,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:32:42,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:32:42,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:32:42,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:32:42,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:32:42,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:32:42,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:32:42,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:32:42,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:32:42,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:32:42,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:32:42,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:32:42,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:32:42,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:32:42,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:32:42,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:32:42,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:32:42,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:32:42,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:32:42,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:32:42,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:32:42,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:32:42,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:32:42,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:32:42,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:32:42,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:32:42,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:32:42,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:32:42,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:32:42,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:32:42,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:32:42,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:32:42,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:32:42,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:32:42,454 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:32:42,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:32:42,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:32:42,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:32:42,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:32:42,494 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:32:42,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:32:42,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:32:42,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:32:42,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:32:42,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:32:42,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:32:42,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:32:42,495 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:32:42,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:32:42,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:32:42,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:32:42,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:32:42,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:32:42,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:32:42,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:32:42,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:32:42,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:32:42,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:32:42,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:32:42,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:32:42,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:32:42,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:32:42,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:32:42,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:32:42,935 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:32:42,935 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:32:42,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2020-12-21 22:32:43,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b7f6141/eb0517923af44d3d870257005122e7c5/FLAGcd8ab8730 [2020-12-21 22:32:43,515 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:32:43,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2020-12-21 22:32:43,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b7f6141/eb0517923af44d3d870257005122e7c5/FLAGcd8ab8730 [2020-12-21 22:32:43,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b7f6141/eb0517923af44d3d870257005122e7c5 [2020-12-21 22:32:43,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:32:43,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:32:43,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:32:43,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:32:43,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:32:43,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:32:43" (1/1) ... [2020-12-21 22:32:43,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3776a5dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:43, skipping insertion in model container [2020-12-21 22:32:43,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:32:43" (1/1) ... [2020-12-21 22:32:43,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:32:43,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:32:44,089 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2020-12-21 22:32:44,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:32:44,123 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:32:44,139 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2020-12-21 22:32:44,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:32:44,169 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:32:44,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44 WrapperNode [2020-12-21 22:32:44,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:32:44,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:32:44,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:32:44,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:32:44,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:32:44,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:32:44,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:32:44,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:32:44,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (1/1) ... [2020-12-21 22:32:44,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:32:44,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:32:44,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:32:44,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:32:44,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (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 [2020-12-21 22:32:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:32:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:32:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:32:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:32:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:32:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:32:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:32:44,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:32:44,843 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 22:32:44,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:32:44 BoogieIcfgContainer [2020-12-21 22:32:44,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:32:44,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:32:44,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:32:44,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:32:44,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:32:43" (1/3) ... [2020-12-21 22:32:44,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bcf81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:32:44, skipping insertion in model container [2020-12-21 22:32:44,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:44" (2/3) ... [2020-12-21 22:32:44,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bcf81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:32:44, skipping insertion in model container [2020-12-21 22:32:44,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:32:44" (3/3) ... [2020-12-21 22:32:44,868 INFO L111 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2020-12-21 22:32:44,884 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:32:44,898 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:32:44,940 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:32:44,976 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:32:44,976 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:32:44,977 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:32:44,977 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:32:44,977 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:32:44,977 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:32:44,978 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:32:44,978 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:32:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-21 22:32:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:32:45,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:45,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:45,007 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:45,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2020-12-21 22:32:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:45,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662961106] [2020-12-21 22:32:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:45,181 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:45,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623683093] [2020-12-21 22:32:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:32:45,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:32:45,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:32:45,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662961106] [2020-12-21 22:32:45,339 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:45,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623683093] [2020-12-21 22:32:45,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:32:45,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:32:45,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754894356] [2020-12-21 22:32:45,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:32:45,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:45,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:32:45,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:32:45,365 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-12-21 22:32:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:45,388 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2020-12-21 22:32:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:32:45,390 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:32:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:45,401 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:32:45,402 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 22:32:45,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:32:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 22:32:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-21 22:32:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 22:32:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-12-21 22:32:45,447 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2020-12-21 22:32:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:45,447 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-12-21 22:32:45,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:32:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-12-21 22:32:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:32:45,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:45,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:45,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:32:45,665 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2020-12-21 22:32:45,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:45,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835408992] [2020-12-21 22:32:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:45,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:45,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20199694] [2020-12-21 22:32:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:32:45,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:32:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:32:45,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835408992] [2020-12-21 22:32:45,940 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:45,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20199694] [2020-12-21 22:32:45,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:32:45,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:32:45,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084787259] [2020-12-21 22:32:45,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:32:45,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:32:45,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:32:45,961 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2020-12-21 22:32:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:46,021 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-12-21 22:32:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:32:46,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 22:32:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:46,023 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:32:46,023 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 22:32:46,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:32:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 22:32:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-21 22:32:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:32:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2020-12-21 22:32:46,031 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2020-12-21 22:32:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:46,031 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2020-12-21 22:32:46,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:32:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2020-12-21 22:32:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:32:46,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:46,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:46,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:46,248 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:46,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2020-12-21 22:32:46,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:46,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019021414] [2020-12-21 22:32:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:46,270 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:46,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605289529] [2020-12-21 22:32:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:32:46,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:32:46,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:32:46,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019021414] [2020-12-21 22:32:46,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:46,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605289529] [2020-12-21 22:32:46,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:32:46,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:32:46,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741528800] [2020-12-21 22:32:46,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:32:46,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:32:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:32:46,411 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 4 states. [2020-12-21 22:32:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:46,514 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2020-12-21 22:32:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:32:46,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 22:32:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:46,517 INFO L225 Difference]: With dead ends: 67 [2020-12-21 22:32:46,517 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:32:46,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:32:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:32:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-12-21 22:32:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 22:32:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-12-21 22:32:46,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2020-12-21 22:32:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:46,528 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-12-21 22:32:46,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:32:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-12-21 22:32:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:32:46,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:46,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:46,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:46,743 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2020-12-21 22:32:46,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:46,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513146227] [2020-12-21 22:32:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:46,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:46,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242982680] [2020-12-21 22:32:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:32:46,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:32:46,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:32:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513146227] [2020-12-21 22:32:46,889 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242982680] [2020-12-21 22:32:46,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:32:46,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:32:46,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682872983] [2020-12-21 22:32:46,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:32:46,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:46,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:32:46,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:32:46,892 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2020-12-21 22:32:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:46,982 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-12-21 22:32:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:32:46,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-21 22:32:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:46,984 INFO L225 Difference]: With dead ends: 67 [2020-12-21 22:32:46,984 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:32:46,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:32:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:32:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-12-21 22:32:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:32:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-12-21 22:32:46,993 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2020-12-21 22:32:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:46,994 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-12-21 22:32:46,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:32:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-12-21 22:32:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:32:46,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:46,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:47,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:47,209 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2020-12-21 22:32:47,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:47,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171300775] [2020-12-21 22:32:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:47,225 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:47,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202379725] [2020-12-21 22:32:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:32:47,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:32:47,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:32:47,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171300775] [2020-12-21 22:32:47,406 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:47,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202379725] [2020-12-21 22:32:47,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:32:47,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:32:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761356984] [2020-12-21 22:32:47,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:32:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:47,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:32:47,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:32:47,417 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2020-12-21 22:32:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:47,541 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2020-12-21 22:32:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:32:47,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-21 22:32:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:47,543 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:32:47,543 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:32:47,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:32:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:32:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-12-21 22:32:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:32:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-12-21 22:32:47,553 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2020-12-21 22:32:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:47,553 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-12-21 22:32:47,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:32:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-12-21 22:32:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:32:47,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:47,554 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:47,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:47,770 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:47,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1771086529, now seen corresponding path program 2 times [2020-12-21 22:32:47,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:47,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154614524] [2020-12-21 22:32:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:47,783 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:47,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177163388] [2020-12-21 22:32:47,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:32:47,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:32:47,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:32:47,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:32:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:32:47,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154614524] [2020-12-21 22:32:47,913 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:47,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177163388] [2020-12-21 22:32:47,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:32:47,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:32:47,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351823603] [2020-12-21 22:32:47,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:32:47,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:47,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:32:47,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:32:47,916 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 4 states. [2020-12-21 22:32:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:47,993 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-12-21 22:32:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:32:47,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 22:32:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:47,995 INFO L225 Difference]: With dead ends: 87 [2020-12-21 22:32:47,995 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 22:32:47,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:32:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 22:32:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2020-12-21 22:32:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:32:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-12-21 22:32:48,005 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 19 [2020-12-21 22:32:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:48,005 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-12-21 22:32:48,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:32:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-12-21 22:32:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:32:48,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:48,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:48,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:48,223 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1618381713, now seen corresponding path program 1 times [2020-12-21 22:32:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:48,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313082602] [2020-12-21 22:32:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:48,236 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:48,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894509235] [2020-12-21 22:32:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:32:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:32:48,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:32:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:32:48,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313082602] [2020-12-21 22:32:48,473 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:48,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894509235] [2020-12-21 22:32:48,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:32:48,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:32:48,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802103084] [2020-12-21 22:32:48,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:32:48,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:48,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:32:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:32:48,489 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-12-21 22:32:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:48,625 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2020-12-21 22:32:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:32:48,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-12-21 22:32:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:48,627 INFO L225 Difference]: With dead ends: 95 [2020-12-21 22:32:48,627 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 22:32:48,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:32:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 22:32:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-12-21 22:32:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 22:32:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-12-21 22:32:48,639 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 31 [2020-12-21 22:32:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:48,640 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-12-21 22:32:48,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:32:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-12-21 22:32:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:32:48,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:48,641 INFO L422 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] [2020-12-21 22:32:48,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:48,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash -440379608, now seen corresponding path program 2 times [2020-12-21 22:32:48,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:48,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892868148] [2020-12-21 22:32:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:48,869 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:48,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493984386] [2020-12-21 22:32:48,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:32:48,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:32:48,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:32:48,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:32:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 22:32:49,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892868148] [2020-12-21 22:32:49,130 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:49,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493984386] [2020-12-21 22:32:49,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:32:49,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:32:49,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448695785] [2020-12-21 22:32:49,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:32:49,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:49,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:32:49,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:32:49,132 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2020-12-21 22:32:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:49,281 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2020-12-21 22:32:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:32:49,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 22:32:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:49,282 INFO L225 Difference]: With dead ends: 111 [2020-12-21 22:32:49,282 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 22:32:49,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:32:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 22:32:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2020-12-21 22:32:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:32:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-12-21 22:32:49,293 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 35 [2020-12-21 22:32:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:49,294 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-12-21 22:32:49,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:32:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-12-21 22:32:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 22:32:49,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:49,295 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:49,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:32:49,507 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:49,508 INFO L82 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 3 times [2020-12-21 22:32:49,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:49,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132852565] [2020-12-21 22:32:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:49,518 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:49,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393060625] [2020-12-21 22:32:49,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:49,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:32:49,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:32:49,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:32:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 22:32:49,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132852565] [2020-12-21 22:32:49,692 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:49,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393060625] [2020-12-21 22:32:49,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:32:49,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:32:49,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400983364] [2020-12-21 22:32:49,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:32:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:49,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:32:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:32:49,694 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2020-12-21 22:32:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:49,756 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-12-21 22:32:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:32:49,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-21 22:32:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:49,759 INFO L225 Difference]: With dead ends: 114 [2020-12-21 22:32:49,759 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 22:32:49,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:32:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 22:32:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-21 22:32:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 22:32:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-12-21 22:32:49,772 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 39 [2020-12-21 22:32:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:49,773 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-12-21 22:32:49,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:32:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-12-21 22:32:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:32:49,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:49,774 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:49,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:49,987 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:49,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1913562003, now seen corresponding path program 4 times [2020-12-21 22:32:49,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:49,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812520503] [2020-12-21 22:32:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:50,011 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:50,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755541062] [2020-12-21 22:32:50,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:50,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:32:50,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:32:50,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:32:50,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:27,485 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:33:27,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:33:27,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:33:27,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:33:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 0 refuted. 6 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-21 22:33:27,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812520503] [2020-12-21 22:33:27,601 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:27,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755541062] [2020-12-21 22:33:27,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:27,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 22:33:27,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779937225] [2020-12-21 22:33:27,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:33:27,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:27,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:33:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=139, Unknown=18, NotChecked=0, Total=210 [2020-12-21 22:33:27,603 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 15 states. [2020-12-21 22:33:38,242 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-21 22:33:40,553 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-21 22:35:15,754 WARN L197 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-21 22:35:42,347 WARN L197 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-21 22:36:09,215 WARN L197 SmtUtils]: Spent 12.47 s on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-12-21 22:36:31,946 WARN L197 SmtUtils]: Spent 8.38 s on a formula simplification that was a NOOP. DAG size: 88 [2020-12-21 22:36:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:46,693 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2020-12-21 22:36:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:36:46,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-12-21 22:36:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:46,695 INFO L225 Difference]: With dead ends: 110 [2020-12-21 22:36:46,695 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:36:46,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 145.8s TimeCoverageRelationStatistics Valid=114, Invalid=339, Unknown=53, NotChecked=0, Total=506 [2020-12-21 22:36:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:36:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2020-12-21 22:36:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 22:36:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2020-12-21 22:36:46,713 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 49 [2020-12-21 22:36:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:46,714 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2020-12-21 22:36:46,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:36:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2020-12-21 22:36:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:36:46,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:46,716 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:46,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:36:46,931 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1794599279, now seen corresponding path program 1 times [2020-12-21 22:36:46,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:46,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035934951] [2020-12-21 22:36:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:46,947 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:46,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955023396] [2020-12-21 22:36:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:36:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:36:47,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:36:47,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:36:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 22:36:47,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035934951] [2020-12-21 22:36:47,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:36:47,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955023396] [2020-12-21 22:36:47,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:36:47,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:36:47,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986278439] [2020-12-21 22:36:47,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:36:47,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:36:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:36:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:36:47,307 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand 8 states. [2020-12-21 22:36:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:47,545 INFO L93 Difference]: Finished difference Result 235 states and 306 transitions. [2020-12-21 22:36:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:36:47,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-12-21 22:36:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:47,547 INFO L225 Difference]: With dead ends: 235 [2020-12-21 22:36:47,548 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 22:36:47,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:36:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 22:36:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2020-12-21 22:36:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 22:36:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2020-12-21 22:36:47,578 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 49 [2020-12-21 22:36:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:47,580 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2020-12-21 22:36:47,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:36:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2020-12-21 22:36:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 22:36:47,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:47,585 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:47,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:36:47,787 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1853245373, now seen corresponding path program 2 times [2020-12-21 22:36:47,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:47,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642471056] [2020-12-21 22:36:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:47,810 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:47,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800837997] [2020-12-21 22:36:47,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:36:47,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:36:47,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:36:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:36:47,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:36:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-21 22:36:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642471056] [2020-12-21 22:36:48,202 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:36:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800837997] [2020-12-21 22:36:48,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:36:48,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:36:48,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442480304] [2020-12-21 22:36:48,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:36:48,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:36:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:36:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:36:48,204 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand 9 states. [2020-12-21 22:36:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:48,490 INFO L93 Difference]: Finished difference Result 271 states and 351 transitions. [2020-12-21 22:36:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:36:48,491 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-21 22:36:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:48,492 INFO L225 Difference]: With dead ends: 271 [2020-12-21 22:36:48,492 INFO L226 Difference]: Without dead ends: 159 [2020-12-21 22:36:48,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:36:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-21 22:36:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 133. [2020-12-21 22:36:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-21 22:36:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 172 transitions. [2020-12-21 22:36:48,509 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 172 transitions. Word has length 54 [2020-12-21 22:36:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:48,509 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 172 transitions. [2020-12-21 22:36:48,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:36:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 172 transitions. [2020-12-21 22:36:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 22:36:48,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:48,511 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:48,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:36:48,725 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash -32752209, now seen corresponding path program 3 times [2020-12-21 22:36:48,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:48,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661752639] [2020-12-21 22:36:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:48,735 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:48,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415008755] [2020-12-21 22:36:48,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 22:36:48,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:36:48,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:36:48,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:36:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:36:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-21 22:36:49,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661752639] [2020-12-21 22:36:49,008 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:36:49,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415008755] [2020-12-21 22:36:49,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:36:49,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:36:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835942659] [2020-12-21 22:36:49,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:36:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:36:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:36:49,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:36:49,009 INFO L87 Difference]: Start difference. First operand 133 states and 172 transitions. Second operand 5 states. [2020-12-21 22:36:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:49,178 INFO L93 Difference]: Finished difference Result 370 states and 484 transitions. [2020-12-21 22:36:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:36:49,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-12-21 22:36:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:49,182 INFO L225 Difference]: With dead ends: 370 [2020-12-21 22:36:49,182 INFO L226 Difference]: Without dead ends: 338 [2020-12-21 22:36:49,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:36:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-12-21 22:36:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 157. [2020-12-21 22:36:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 22:36:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 204 transitions. [2020-12-21 22:36:49,202 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 204 transitions. Word has length 59 [2020-12-21 22:36:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:49,203 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 204 transitions. [2020-12-21 22:36:49,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:36:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 204 transitions. [2020-12-21 22:36:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 22:36:49,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:49,206 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:49,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:36:49,421 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1244819935, now seen corresponding path program 4 times [2020-12-21 22:36:49,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:49,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836546306] [2020-12-21 22:36:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:49,430 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:49,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328006172] [2020-12-21 22:36:49,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:36:49,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:36:49,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:36:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 22:36:49,556 INFO L286 TraceCheckSpWp]: Computing forward predicates...