/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/add-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:27:48,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:27:48,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:27:49,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:27:49,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:27:49,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:27:49,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:27:49,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:27:49,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:27:49,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:27:49,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:27:49,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:27:49,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:27:49,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:27:49,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:27:49,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:27:49,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:27:49,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:27:49,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:27:49,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:27:49,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:27:49,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:27:49,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:27:49,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:27:49,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 22:27:49,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 22:27:49,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 22:27:49,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 22:27:49,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 22:27:49,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 22:27:49,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:27:49,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:27:49,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:27:49,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:27:49,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:27:49,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:27:49,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:27:49,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:27:49,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:27:49,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:27:49,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:27:49,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:27:49,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:27:49,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:27:49,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:27:49,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:27:49,235 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:27:49,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:27:49,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:27:49,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:27:49,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:27:49,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:27:49,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:27:49,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:27:49,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:27:49,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:27:49,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:27:49,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:27:49,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:27:49,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:27:49,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:27:49,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:27:49,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:27:49,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:27:49,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:27:49,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:27:49,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:27:49,243 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:27:49,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:27:49,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:27:49,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:27:49,804 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:27:49,805 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:27:49,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/add-3-n-u.c [2020-12-21 22:27:49,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faaea5526/170beb6dade64ed3bc6c2c693722c4bd/FLAG06d19b669 [2020-12-21 22:27:50,614 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:27:50,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/add-3-n-u.c [2020-12-21 22:27:50,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faaea5526/170beb6dade64ed3bc6c2c693722c4bd/FLAG06d19b669 [2020-12-21 22:27:50,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faaea5526/170beb6dade64ed3bc6c2c693722c4bd [2020-12-21 22:27:50,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:27:50,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:27:50,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:27:50,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:27:50,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:27:50,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:27:50" (1/1) ... [2020-12-21 22:27:50,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d8def9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:50, skipping insertion in model container [2020-12-21 22:27:50,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:27:50" (1/1) ... [2020-12-21 22:27:50,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:27:50,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:27:51,150 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/add-3-n-u.c[321,334] [2020-12-21 22:27:51,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:27:51,205 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:27:51,222 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/add-3-n-u.c[321,334] [2020-12-21 22:27:51,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:27:51,262 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:27:51,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51 WrapperNode [2020-12-21 22:27:51,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:27:51,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:27:51,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:27:51,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:27:51,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:27:51,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:27:51,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:27:51,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:27:51,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (1/1) ... [2020-12-21 22:27:51,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:27:51,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:27:51,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:27:51,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:27:51,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (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 22:27:51,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:27:51,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:27:51,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:27:51,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:27:51,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:27:51,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:27:51,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:27:52,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:27:52,288 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 22:27:52,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:27:52 BoogieIcfgContainer [2020-12-21 22:27:52,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:27:52,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:27:52,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:27:52,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:27:52,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:27:50" (1/3) ... [2020-12-21 22:27:52,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c8a583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:27:52, skipping insertion in model container [2020-12-21 22:27:52,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:51" (2/3) ... [2020-12-21 22:27:52,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c8a583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:27:52, skipping insertion in model container [2020-12-21 22:27:52,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:27:52" (3/3) ... [2020-12-21 22:27:52,315 INFO L111 eAbstractionObserver]: Analyzing ICFG add-3-n-u.c [2020-12-21 22:27:52,322 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:27:52,328 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:27:52,349 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:27:52,381 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:27:52,381 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:27:52,381 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:27:52,381 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:27:52,382 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:27:52,382 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:27:52,382 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:27:52,382 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:27:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-21 22:27:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:27:52,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:52,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:52,409 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:52,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2020-12-21 22:27:52,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:52,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569033418] [2020-12-21 22:27:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:52,557 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:52,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785697531] [2020-12-21 22:27:52,558 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 22:27:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:27:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:52,861 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 22:27:52,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569033418] [2020-12-21 22:27:52,864 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:52,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785697531] [2020-12-21 22:27:52,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:52,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:27:52,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333461717] [2020-12-21 22:27:52,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:27:52,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:52,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:27:52,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:27:52,913 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-21 22:27:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:52,950 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2020-12-21 22:27:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:27:52,952 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:27:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:52,980 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:27:52,981 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:27:52,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:27:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:27:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 22:27:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:27:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2020-12-21 22:27:53,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2020-12-21 22:27:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:53,054 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2020-12-21 22:27:53,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:27:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2020-12-21 22:27:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:27:53,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:53,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:53,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:27:53,272 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2020-12-21 22:27:53,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:53,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284432191] [2020-12-21 22:27:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:53,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:53,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490050988] [2020-12-21 22:27:53,289 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 22:27:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:27:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:53,450 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 22:27:53,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284432191] [2020-12-21 22:27:53,451 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:53,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490050988] [2020-12-21 22:27:53,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:53,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:27:53,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703487919] [2020-12-21 22:27:53,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:27:53,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:27:53,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:27:53,456 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2020-12-21 22:27:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:53,508 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2020-12-21 22:27:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:27:53,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 22:27:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:53,510 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:27:53,510 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 22:27:53,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:27:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 22:27:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-21 22:27:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:27:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-12-21 22:27:53,519 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2020-12-21 22:27:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:53,520 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-12-21 22:27:53,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:27:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-12-21 22:27:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:27:53,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:53,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:53,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:53,737 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2020-12-21 22:27:53,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:53,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018919075] [2020-12-21 22:27:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:53,758 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:53,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967296483] [2020-12-21 22:27:53,759 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 22:27:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:53,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:27:53,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:53,894 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 22:27:53,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018919075] [2020-12-21 22:27:53,895 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:53,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967296483] [2020-12-21 22:27:53,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:53,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:27:53,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973452857] [2020-12-21 22:27:53,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:27:53,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:53,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:27:53,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:53,899 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2020-12-21 22:27:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:53,996 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2020-12-21 22:27:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:27:53,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 22:27:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:53,999 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:27:53,999 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:27:54,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:27:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2020-12-21 22:27:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:27:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-12-21 22:27:54,009 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2020-12-21 22:27:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:54,009 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-12-21 22:27:54,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:27:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-12-21 22:27:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:27:54,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:54,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:54,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:54,225 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2020-12-21 22:27:54,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:54,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762463910] [2020-12-21 22:27:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:54,240 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:54,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581880809] [2020-12-21 22:27:54,242 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 22:27:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:27:54,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:54,383 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 22:27:54,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762463910] [2020-12-21 22:27:54,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:54,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581880809] [2020-12-21 22:27:54,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:54,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:27:54,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935762423] [2020-12-21 22:27:54,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:27:54,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:54,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:27:54,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:54,391 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 4 states. [2020-12-21 22:27:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:54,527 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-12-21 22:27:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:27:54,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-21 22:27:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:54,529 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:27:54,530 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 22:27:54,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 22:27:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-12-21 22:27:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:27:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-21 22:27:54,562 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2020-12-21 22:27:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:54,563 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-21 22:27:54,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:27:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-21 22:27:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:27:54,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:54,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:54,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:54,769 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:54,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:54,770 INFO L82 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2020-12-21 22:27:54,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:54,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82570298] [2020-12-21 22:27:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:54,783 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:54,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398610365] [2020-12-21 22:27:54,783 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 22:27:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:54,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:27:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:55,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82570298] [2020-12-21 22:27:55,018 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:55,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398610365] [2020-12-21 22:27:55,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:55,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:27:55,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543822911] [2020-12-21 22:27:55,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:27:55,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:27:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:27:55,021 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2020-12-21 22:27:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:55,159 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2020-12-21 22:27:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:27:55,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-21 22:27:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:55,162 INFO L225 Difference]: With dead ends: 71 [2020-12-21 22:27:55,162 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:27:55,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:27:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:27:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-12-21 22:27:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 22:27:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-12-21 22:27:55,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2020-12-21 22:27:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:55,193 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-12-21 22:27:55,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:27:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-12-21 22:27:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:27:55,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:55,195 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:55,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:55,410 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1978170721, now seen corresponding path program 2 times [2020-12-21 22:27:55,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:55,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435562445] [2020-12-21 22:27:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:55,424 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:55,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698438999] [2020-12-21 22:27:55,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:55,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:27:55,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:27:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:27:55,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435562445] [2020-12-21 22:27:55,577 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:55,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698438999] [2020-12-21 22:27:55,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:55,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:27:55,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113846273] [2020-12-21 22:27:55,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:27:55,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:55,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:27:55,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:55,580 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 4 states. [2020-12-21 22:27:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:55,649 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2020-12-21 22:27:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:27:55,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 22:27:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:55,651 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:27:55,651 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 22:27:55,652 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 22:27:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 22:27:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2020-12-21 22:27:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:27:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 22:27:55,662 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2020-12-21 22:27:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:55,662 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 22:27:55,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:27:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 22:27:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:27:55,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:55,663 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:55,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:55,880 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:55,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1749813085, now seen corresponding path program 1 times [2020-12-21 22:27:55,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:55,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468743325] [2020-12-21 22:27:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:55,904 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:55,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361574066] [2020-12-21 22:27:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:55,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:27:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:27:56,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468743325] [2020-12-21 22:27:56,091 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:56,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361574066] [2020-12-21 22:27:56,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:56,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:27:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545410116] [2020-12-21 22:27:56,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:27:56,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:27:56,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:27:56,094 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 6 states. [2020-12-21 22:27:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:56,229 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2020-12-21 22:27:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:27:56,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-21 22:27:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:56,231 INFO L225 Difference]: With dead ends: 83 [2020-12-21 22:27:56,231 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:27:56,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 22:27:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:27:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-12-21 22:27:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 22:27:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-21 22:27:56,242 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-12-21 22:27:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:56,243 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-21 22:27:56,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:27:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-21 22:27:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:27:56,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:56,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:56,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:56,459 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1516282694, now seen corresponding path program 2 times [2020-12-21 22:27:56,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:56,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600005171] [2020-12-21 22:27:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:56,474 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:56,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507292293] [2020-12-21 22:27:56,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:56,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:27:56,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:27:56,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:27:56,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600005171] [2020-12-21 22:27:56,698 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:56,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507292293] [2020-12-21 22:27:56,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:56,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:27:56,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366146670] [2020-12-21 22:27:56,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:27:56,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:56,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:27:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:27:56,701 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 7 states. [2020-12-21 22:27:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:56,848 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-12-21 22:27:56,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:27:56,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-21 22:27:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:56,851 INFO L225 Difference]: With dead ends: 95 [2020-12-21 22:27:56,851 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 22:27:56,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 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 22:27:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 22:27:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-12-21 22:27:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:27:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-12-21 22:27:56,862 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2020-12-21 22:27:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:56,862 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-12-21 22:27:56,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:27:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-12-21 22:27:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:27:56,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:56,864 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:57,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:27:57,081 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:57,082 INFO L82 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 3 times [2020-12-21 22:27:57,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:57,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170387799] [2020-12-21 22:27:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:57,091 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:57,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728719689] [2020-12-21 22:27:57,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:57,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:27:57,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:57,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:27:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 22:27:57,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170387799] [2020-12-21 22:27:57,231 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:57,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728719689] [2020-12-21 22:27:57,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:57,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:27:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066946248] [2020-12-21 22:27:57,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:27:57,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:27:57,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:27:57,234 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2020-12-21 22:27:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:57,327 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2020-12-21 22:27:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:27:57,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-21 22:27:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:57,331 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:27:57,331 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 22:27:57,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 22:27:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 22:27:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2020-12-21 22:27:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:27:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2020-12-21 22:27:57,349 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2020-12-21 22:27:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:57,349 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2020-12-21 22:27:57,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:27:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2020-12-21 22:27:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:27:57,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:57,351 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:57,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:57,567 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash -893728359, now seen corresponding path program 4 times [2020-12-21 22:27:57,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:57,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624665140] [2020-12-21 22:27:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:57,581 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:57,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412717752] [2020-12-21 22:27:57,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:00,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:28:00,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:00,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:00,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 22:28:00,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624665140] [2020-12-21 22:28:00,445 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:00,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412717752] [2020-12-21 22:28:00,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:00,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:00,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597488968] [2020-12-21 22:28:00,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:00,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:00,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:00,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:00,449 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 5 states. [2020-12-21 22:28:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:00,577 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2020-12-21 22:28:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:00,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-21 22:28:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:00,579 INFO L225 Difference]: With dead ends: 207 [2020-12-21 22:28:00,580 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 22:28:00,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 22:28:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 22:28:00,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2020-12-21 22:28:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 22:28:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2020-12-21 22:28:00,606 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 51 [2020-12-21 22:28:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:00,606 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2020-12-21 22:28:00,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2020-12-21 22:28:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:28:00,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:00,608 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:00,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:00,823 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1234417409, now seen corresponding path program 5 times [2020-12-21 22:28:00,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:00,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310707697] [2020-12-21 22:28:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:00,836 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:00,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292943498] [2020-12-21 22:28:00,837 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 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