/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/init-4-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:29:26,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:29:26,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:29:26,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:29:26,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:29:26,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:29:26,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:29:26,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:29:26,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:29:26,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:29:26,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:29:26,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:29:26,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:29:26,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:29:26,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:29:26,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:29:26,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:29:26,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:29:26,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:29:26,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:29:26,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:29:26,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:29:26,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:29:26,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:29:26,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:29:26,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:29:26,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:29:26,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:29:26,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:29:26,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:29:26,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:29:26,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:29:26,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:29:26,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:29:26,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:29:26,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:29:26,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:29:26,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:29:26,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:29:26,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:29:26,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:29:26,314 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:29:26,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:29:26,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:29:26,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:29:26,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:29:26,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:29:26,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:29:26,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:29:26,317 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:29:26,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:29:26,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:29:26,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:29:26,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:29:26,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:29:26,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:29:26,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:29:26,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:29:26,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:29:26,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:29:26,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:29:26,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:29:26,320 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:29:26,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:29:26,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:29:26,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:29:26,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:29:26,830 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:29:26,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2020-12-21 22:29:26,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd73acaa5/cfa971d4a52341199f1b432096e99eb7/FLAGf60cda1eb [2020-12-21 22:29:27,594 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:29:27,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2020-12-21 22:29:27,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd73acaa5/cfa971d4a52341199f1b432096e99eb7/FLAGf60cda1eb [2020-12-21 22:29:27,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd73acaa5/cfa971d4a52341199f1b432096e99eb7 [2020-12-21 22:29:27,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:29:27,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:29:27,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:29:27,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:29:27,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:29:27,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:29:27" (1/1) ... [2020-12-21 22:29:27,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b965d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:27, skipping insertion in model container [2020-12-21 22:29:27,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:29:27" (1/1) ... [2020-12-21 22:29:27,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:29:27,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:29:28,116 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/init-4-n-u.c[322,335] [2020-12-21 22:29:28,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:29:28,153 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:29:28,168 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/init-4-n-u.c[322,335] [2020-12-21 22:29:28,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:29:28,201 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:29:28,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28 WrapperNode [2020-12-21 22:29:28,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:29:28,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:29:28,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:29:28,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:29:28,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:29:28,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:29:28,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:29:28,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:29:28,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (1/1) ... [2020-12-21 22:29:28,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:29:28,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:29:28,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:29:28,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:29:28,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (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 22:29:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:29:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:29:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:29:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:29:28,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:29:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:29:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:29:28,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:29:28,930 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-21 22:29:28,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:29:28 BoogieIcfgContainer [2020-12-21 22:29:28,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:29:28,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:29:28,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:29:28,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:29:28,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:29:27" (1/3) ... [2020-12-21 22:29:28,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed0031b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:29:28, skipping insertion in model container [2020-12-21 22:29:28,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:28" (2/3) ... [2020-12-21 22:29:28,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed0031b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:29:28, skipping insertion in model container [2020-12-21 22:29:28,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:29:28" (3/3) ... [2020-12-21 22:29:28,982 INFO L111 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2020-12-21 22:29:28,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:29:28,996 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:29:29,022 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:29:29,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:29:29,067 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:29:29,067 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:29:29,068 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:29:29,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:29:29,068 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:29:29,068 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:29:29,068 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:29:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-21 22:29:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:29:29,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:29,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:29,101 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1868122297, now seen corresponding path program 1 times [2020-12-21 22:29:29,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:29,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763407678] [2020-12-21 22:29:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:29,262 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:29,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280544411] [2020-12-21 22:29:29,264 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 22:29:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:29:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:29,425 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 22:29:29,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763407678] [2020-12-21 22:29:29,426 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:29,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280544411] [2020-12-21 22:29:29,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:29,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:29:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616880717] [2020-12-21 22:29:29,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:29:29,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:29:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:29:29,453 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-21 22:29:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:29,474 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2020-12-21 22:29:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:29:29,476 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-21 22:29:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:29,486 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:29:29,486 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 22:29:29,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 22:29:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 22:29:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-21 22:29:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 22:29:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2020-12-21 22:29:29,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2020-12-21 22:29:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:29,528 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2020-12-21 22:29:29,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:29:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2020-12-21 22:29:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:29:29,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:29,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:29,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:29:29,745 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash -58278076, now seen corresponding path program 1 times [2020-12-21 22:29:29,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:29,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093912006] [2020-12-21 22:29:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:29,769 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:29,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991053289] [2020-12-21 22:29:29,770 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 22:29:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:29:29,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:29,931 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 22:29:29,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093912006] [2020-12-21 22:29:29,932 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:29,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991053289] [2020-12-21 22:29:29,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:29,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:29:29,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859409475] [2020-12-21 22:29:29,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:29:29,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:29:29,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:29:29,936 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 3 states. [2020-12-21 22:29:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:29,978 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-12-21 22:29:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:29:29,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 22:29:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:29,980 INFO L225 Difference]: With dead ends: 40 [2020-12-21 22:29:29,980 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 22:29:29,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 22:29:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 22:29:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-12-21 22:29:29,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 22:29:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-12-21 22:29:29,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2020-12-21 22:29:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:29,988 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-12-21 22:29:29,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:29:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-12-21 22:29:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:29:29,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:29,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:30,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:30,203 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:30,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1196059767, now seen corresponding path program 1 times [2020-12-21 22:29:30,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:30,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349837266] [2020-12-21 22:29:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:30,218 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:30,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412929500] [2020-12-21 22:29:30,218 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 22:29:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:29:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:30,377 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 22:29:30,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349837266] [2020-12-21 22:29:30,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:30,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412929500] [2020-12-21 22:29:30,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:30,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:29:30,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420756242] [2020-12-21 22:29:30,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:30,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:30,380 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2020-12-21 22:29:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:30,451 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2020-12-21 22:29:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:30,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-21 22:29:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:30,453 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:29:30,453 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 22:29:30,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 22:29:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 22:29:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2020-12-21 22:29:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:29:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-12-21 22:29:30,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2020-12-21 22:29:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:30,462 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-12-21 22:29:30,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-12-21 22:29:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:29:30,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:30,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:30,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:30,678 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:30,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1301954304, now seen corresponding path program 1 times [2020-12-21 22:29:30,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:30,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161694037] [2020-12-21 22:29:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:30,693 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:30,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195850291] [2020-12-21 22:29:30,693 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 22:29:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:29:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:30,838 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 22:29:30,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161694037] [2020-12-21 22:29:30,839 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:30,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195850291] [2020-12-21 22:29:30,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:30,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:29:30,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892570956] [2020-12-21 22:29:30,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:30,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:30,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:30,842 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 4 states. [2020-12-21 22:29:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:30,925 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-12-21 22:29:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:30,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-21 22:29:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:30,927 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:29:30,927 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:29:30,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 22:29:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:29:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-12-21 22:29:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:29:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-21 22:29:30,936 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2020-12-21 22:29:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:30,937 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-21 22:29:30,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:30,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-21 22:29:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:29:30,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:30,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:31,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:31,154 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1938337909, now seen corresponding path program 1 times [2020-12-21 22:29:31,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:31,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129411716] [2020-12-21 22:29:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:31,167 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:31,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224783127] [2020-12-21 22:29:31,168 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 22:29:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:31,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:29:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:31,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129411716] [2020-12-21 22:29:31,339 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:31,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224783127] [2020-12-21 22:29:31,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:31,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:29:31,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649317194] [2020-12-21 22:29:31,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:31,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:31,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:31,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:31,342 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 4 states. [2020-12-21 22:29:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:31,410 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-12-21 22:29:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:31,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 22:29:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:31,412 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:29:31,412 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:29:31,413 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 22:29:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:29:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-21 22:29:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:29:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-21 22:29:31,420 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2020-12-21 22:29:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:31,421 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-21 22:29:31,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-21 22:29:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:29:31,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:31,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:31,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:31,636 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:31,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:31,637 INFO L82 PathProgramCache]: Analyzing trace with hash 582253679, now seen corresponding path program 1 times [2020-12-21 22:29:31,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:31,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112812473] [2020-12-21 22:29:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:31,651 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:31,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570479717] [2020-12-21 22:29:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:29:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:31,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112812473] [2020-12-21 22:29:31,816 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:31,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570479717] [2020-12-21 22:29:31,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:31,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:29:31,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114940533] [2020-12-21 22:29:31,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:29:31,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:31,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:29:31,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:31,819 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2020-12-21 22:29:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:31,909 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-12-21 22:29:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:29:31,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-21 22:29:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:31,911 INFO L225 Difference]: With dead ends: 64 [2020-12-21 22:29:31,911 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 22:29:31,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 22:29:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-12-21 22:29:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:29:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-21 22:29:31,920 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 20 [2020-12-21 22:29:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:31,921 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-21 22:29:31,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:29:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-21 22:29:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:29:31,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:31,922 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:32,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:32,138 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:32,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1411181579, now seen corresponding path program 2 times [2020-12-21 22:29:32,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:32,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934235775] [2020-12-21 22:29:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:32,150 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:32,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520011004] [2020-12-21 22:29:32,151 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 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 22:29:32,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:29:32,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:29:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:32,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934235775] [2020-12-21 22:29:32,336 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:32,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520011004] [2020-12-21 22:29:32,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:32,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:29:32,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147669768] [2020-12-21 22:29:32,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:29:32,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:32,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:29:32,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:29:32,339 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 6 states. [2020-12-21 22:29:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:32,435 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2020-12-21 22:29:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:29:32,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:29:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:32,437 INFO L225 Difference]: With dead ends: 74 [2020-12-21 22:29:32,437 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 22:29:32,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 22:29:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 22:29:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-12-21 22:29:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:29:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 22:29:32,446 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 21 [2020-12-21 22:29:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:32,446 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 22:29:32,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:29:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 22:29:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 22:29:32,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:32,447 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:32,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:32,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:32,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1338142703, now seen corresponding path program 3 times [2020-12-21 22:29:32,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:32,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006291800] [2020-12-21 22:29:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:32,675 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:32,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760754450] [2020-12-21 22:29:32,675 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 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 22:29:32,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:29:32,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:29:32,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006291800] [2020-12-21 22:29:32,785 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:32,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760754450] [2020-12-21 22:29:32,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:32,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:29:32,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530705455] [2020-12-21 22:29:32,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:32,787 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 4 states. [2020-12-21 22:29:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:32,831 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2020-12-21 22:29:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:32,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-21 22:29:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:32,832 INFO L225 Difference]: With dead ends: 80 [2020-12-21 22:29:32,832 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 22:29:32,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 22:29:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 22:29:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-12-21 22:29:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:29:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-12-21 22:29:32,847 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 22 [2020-12-21 22:29:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:32,848 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-12-21 22:29:32,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-12-21 22:29:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 22:29:32,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:32,855 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:33,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:29:33,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash 142309402, now seen corresponding path program 4 times [2020-12-21 22:29:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:33,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373776980] [2020-12-21 22:29:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:33,084 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:33,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623322109] [2020-12-21 22:29:33,085 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 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 22:29:33,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:29:33,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:33,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-21 22:29:33,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373776980] [2020-12-21 22:29:33,464 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:33,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623322109] [2020-12-21 22:29:33,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:33,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:29:33,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313414247] [2020-12-21 22:29:33,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:29:33,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:29:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:33,466 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 5 states. [2020-12-21 22:29:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:33,535 INFO L93 Difference]: Finished difference Result 151 states and 191 transitions. [2020-12-21 22:29:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:29:33,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-21 22:29:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:33,538 INFO L225 Difference]: With dead ends: 151 [2020-12-21 22:29:33,538 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 22:29:33,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 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 22:29:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 22:29:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2020-12-21 22:29:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 22:29:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2020-12-21 22:29:33,557 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 34 [2020-12-21 22:29:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:33,557 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2020-12-21 22:29:33,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:29:33,558 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2020-12-21 22:29:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 22:29:33,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:33,559 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:33,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:33,774 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:33,775 INFO L82 PathProgramCache]: Analyzing trace with hash -824589212, now seen corresponding path program 5 times [2020-12-21 22:29:33,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:33,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274866332] [2020-12-21 22:29:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:33,786 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:33,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255572803] [2020-12-21 22:29:33,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 22:29:39,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-21 22:29:39,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:29:40,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-21 22:29:40,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274866332] [2020-12-21 22:29:40,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:40,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255572803] [2020-12-21 22:29:40,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:40,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:29:40,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327402515] [2020-12-21 22:29:40,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:29:40,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:29:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:29:40,117 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 7 states. [2020-12-21 22:29:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:40,203 INFO L93 Difference]: Finished difference Result 180 states and 228 transitions. [2020-12-21 22:29:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:29:40,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-12-21 22:29:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:40,205 INFO L225 Difference]: With dead ends: 180 [2020-12-21 22:29:40,205 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:29:40,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 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 22:29:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:29:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-12-21 22:29:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:29:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2020-12-21 22:29:40,223 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 52 [2020-12-21 22:29:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:40,224 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2020-12-21 22:29:40,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:29:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2020-12-21 22:29:40,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:29:40,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:40,226 INFO L422 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:40,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:40,427 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:40,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:40,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2103931612, now seen corresponding path program 6 times [2020-12-21 22:29:40,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:40,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176895720] [2020-12-21 22:29:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:40,444 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:40,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478878362] [2020-12-21 22:29:40,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 22:29:40,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-21 22:29:40,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:29:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 156 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-12-21 22:29:40,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176895720] [2020-12-21 22:29:40,684 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:40,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478878362] [2020-12-21 22:29:40,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:40,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:29:40,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117896097] [2020-12-21 22:29:40,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:29:40,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:40,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:29:40,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:29:40,686 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand 8 states. [2020-12-21 22:29:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:40,773 INFO L93 Difference]: Finished difference Result 202 states and 253 transitions. [2020-12-21 22:29:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:29:40,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 22:29:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:40,774 INFO L225 Difference]: With dead ends: 202 [2020-12-21 22:29:40,774 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 22:29:40,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:29:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 22:29:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-12-21 22:29:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 22:29:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2020-12-21 22:29:40,794 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 56 [2020-12-21 22:29:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:40,794 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2020-12-21 22:29:40,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:29:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2020-12-21 22:29:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 22:29:40,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:40,796 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:41,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:29:41,010 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash -792203548, now seen corresponding path program 7 times [2020-12-21 22:29:41,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:41,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996863144] [2020-12-21 22:29:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:41,036 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:41,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099514520] [2020-12-21 22:29:41,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 22:29:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:41,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:29:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 122 proven. 15 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-12-21 22:29:41,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996863144] [2020-12-21 22:29:41,244 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:41,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099514520] [2020-12-21 22:29:41,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:41,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:29:41,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141942907] [2020-12-21 22:29:41,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:29:41,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:29:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:29:41,246 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand 9 states. [2020-12-21 22:29:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:41,343 INFO L93 Difference]: Finished difference Result 224 states and 278 transitions. [2020-12-21 22:29:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:29:41,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-12-21 22:29:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:41,345 INFO L225 Difference]: With dead ends: 224 [2020-12-21 22:29:41,345 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 22:29:41,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:29:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 22:29:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-12-21 22:29:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 22:29:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2020-12-21 22:29:41,364 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 60 [2020-12-21 22:29:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:41,364 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2020-12-21 22:29:41,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:29:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2020-12-21 22:29:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 22:29:41,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:41,365 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:41,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:41,580 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:41,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:41,581 INFO L82 PathProgramCache]: Analyzing trace with hash 136272292, now seen corresponding path program 8 times [2020-12-21 22:29:41,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:41,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090828759] [2020-12-21 22:29:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:41,592 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:41,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186081431] [2020-12-21 22:29:41,593 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 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 22:29:41,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:29:41,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:29:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 161 proven. 21 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-12-21 22:29:41,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090828759] [2020-12-21 22:29:41,843 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:41,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186081431] [2020-12-21 22:29:41,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:41,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:29:41,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886777244] [2020-12-21 22:29:41,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:29:41,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:29:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:29:41,845 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand 10 states. [2020-12-21 22:29:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:41,965 INFO L93 Difference]: Finished difference Result 246 states and 303 transitions. [2020-12-21 22:29:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:29:41,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-12-21 22:29:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:41,967 INFO L225 Difference]: With dead ends: 246 [2020-12-21 22:29:41,967 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 22:29:41,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:29:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 22:29:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 121. [2020-12-21 22:29:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-21 22:29:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 150 transitions. [2020-12-21 22:29:41,985 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 150 transitions. Word has length 64 [2020-12-21 22:29:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:41,985 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 150 transitions. [2020-12-21 22:29:41,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:29:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 150 transitions. [2020-12-21 22:29:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 22:29:41,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:41,987 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:42,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:29:42,202 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash -883271324, now seen corresponding path program 9 times [2020-12-21 22:29:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:42,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957747365] [2020-12-21 22:29:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:42,211 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:42,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521275816] [2020-12-21 22:29:42,212 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 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 22:29:42,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 22:29:42,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:42,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:29:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 213 proven. 28 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-12-21 22:29:43,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957747365] [2020-12-21 22:29:43,011 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:43,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521275816] [2020-12-21 22:29:43,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:43,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:29:43,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412316845] [2020-12-21 22:29:43,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:29:43,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:29:43,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:29:43,018 INFO L87 Difference]: Start difference. First operand 121 states and 150 transitions. Second operand 11 states. [2020-12-21 22:29:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:43,123 INFO L93 Difference]: Finished difference Result 268 states and 328 transitions. [2020-12-21 22:29:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:29:43,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-12-21 22:29:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:43,125 INFO L225 Difference]: With dead ends: 268 [2020-12-21 22:29:43,125 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 22:29:43,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:29:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 22:29:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2020-12-21 22:29:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-21 22:29:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2020-12-21 22:29:43,148 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 68 [2020-12-21 22:29:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:43,149 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2020-12-21 22:29:43,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:29:43,149 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2020-12-21 22:29:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 22:29:43,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:43,150 INFO L422 BasicCegarLoop]: trace histogram [32, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:43,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:43,365 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1130915364, now seen corresponding path program 10 times [2020-12-21 22:29:43,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:43,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138343725] [2020-12-21 22:29:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:43,375 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:43,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105708824] [2020-12-21 22:29:43,376 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:30:11,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:30:11,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:30:11,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:30:11,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:30:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 257 proven. 36 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-12-21 22:30:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138343725] [2020-12-21 22:30:11,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:30:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105708824] [2020-12-21 22:30:11,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:30:11,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:30:11,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536131853] [2020-12-21 22:30:11,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:30:11,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:30:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:30:11,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:30:11,891 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand 12 states. [2020-12-21 22:30:12,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:30:12,027 INFO L93 Difference]: Finished difference Result 290 states and 353 transitions. [2020-12-21 22:30:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:30:12,027 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-12-21 22:30:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:30:12,029 INFO L225 Difference]: With dead ends: 290 [2020-12-21 22:30:12,029 INFO L226 Difference]: Without dead ends: 164 [2020-12-21 22:30:12,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:30:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-21 22:30:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2020-12-21 22:30:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-21 22:30:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2020-12-21 22:30:12,052 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 72 [2020-12-21 22:30:12,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:30:12,053 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2020-12-21 22:30:12,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:30:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2020-12-21 22:30:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:30:12,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:30:12,055 INFO L422 BasicCegarLoop]: trace histogram [36, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:30:12,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:30:12,270 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:30:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:30:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1159791588, now seen corresponding path program 11 times [2020-12-21 22:30:12,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:30:12,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387092580] [2020-12-21 22:30:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:30:12,282 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:30:12,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027832435] [2020-12-21 22:30:12,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:32:01,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-21 22:32:01,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:32:01,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:32:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:32:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 531 proven. 45 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-21 22:32:01,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387092580] [2020-12-21 22:32:01,713 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:32:01,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027832435] [2020-12-21 22:32:01,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:32:01,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:32:01,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628091624] [2020-12-21 22:32:01,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:32:01,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:32:01,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:32:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:32:01,716 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand 13 states. [2020-12-21 22:32:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:32:01,865 INFO L93 Difference]: Finished difference Result 312 states and 378 transitions. [2020-12-21 22:32:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:32:01,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-21 22:32:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:32:01,867 INFO L225 Difference]: With dead ends: 312 [2020-12-21 22:32:01,867 INFO L226 Difference]: Without dead ends: 176 [2020-12-21 22:32:01,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:32:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-21 22:32:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2020-12-21 22:32:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 22:32:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2020-12-21 22:32:01,888 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 76 [2020-12-21 22:32:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:32:01,888 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2020-12-21 22:32:01,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:32:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2020-12-21 22:32:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 22:32:01,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:32:01,890 INFO L422 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:32:02,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:32:02,090 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:32:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:32:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2002537820, now seen corresponding path program 12 times [2020-12-21 22:32:02,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:32:02,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720055285] [2020-12-21 22:32:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:32:02,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:32:02,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617607050] [2020-12-21 22:32:02,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true