/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:04:44,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:04:44,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:04:44,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:04:44,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:04:44,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:04:44,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:04:44,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:04:44,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:04:44,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:04:44,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:04:44,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:04:44,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:04:44,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:04:44,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:04:44,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:04:44,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:04:44,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:04:44,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:04:44,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:04:44,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:04:44,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:04:44,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:04:44,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:04:44,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-07 05:04:44,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:04:44,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:04:44,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:04:44,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:04:44,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:04:44,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:04:44,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:04:44,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:04:44,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:04:44,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:04:44,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:04:44,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-01-07 05:04:44,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:04:44,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:04:44,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:04:44,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:04:44,371 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:04:44,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:04:44,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:04:44,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:04:44,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:04:44,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:04:44,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:04:44,374 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:04:44,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:04:44,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:04:44,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:04:44,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:04:44,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:04:44,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:04:44,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:04:44,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:04:44,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:04:44,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:04:44,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:04:44,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:04:44,377 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:04:44,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:04:44,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:04:44,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:04:44,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:04:44,772 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:04:44,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-01-07 05:04:44,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/662269882/3d179b5ebb60407f8ec33ec65d582b8c/FLAG9c2c282ff [2021-01-07 05:04:45,600 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:04:45,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-01-07 05:04:45,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/662269882/3d179b5ebb60407f8ec33ec65d582b8c/FLAG9c2c282ff [2021-01-07 05:04:45,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/662269882/3d179b5ebb60407f8ec33ec65d582b8c [2021-01-07 05:04:45,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:04:45,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:04:45,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:04:45,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:04:45,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:04:45,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:04:45" (1/1) ... [2021-01-07 05:04:45,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2e1676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:45, skipping insertion in model container [2021-01-07 05:04:45,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:04:45" (1/1) ... [2021-01-07 05:04:45,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:04:45,939 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~cp~0,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] [2021-01-07 05:04:46,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:04:46,296 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~cp~0,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] [2021-01-07 05:04:46,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:04:46,441 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:04:46,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46 WrapperNode [2021-01-07 05:04:46,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:04:46,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:04:46,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:04:46,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:04:46,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:04:46,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:04:46,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:04:46,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:04:46,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... [2021-01-07 05:04:46,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:04:46,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:04:46,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:04:46,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:04:46,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:46,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:04:46,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:04:46,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:04:46,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:04:46,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:04:46,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:04:47,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:04:47,152 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-07 05:04:47,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:04:47 BoogieIcfgContainer [2021-01-07 05:04:47,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:04:47,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:04:47,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:04:47,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:04:47,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:04:45" (1/3) ... [2021-01-07 05:04:47,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5014d7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:04:47, skipping insertion in model container [2021-01-07 05:04:47,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:04:46" (2/3) ... [2021-01-07 05:04:47,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5014d7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:04:47, skipping insertion in model container [2021-01-07 05:04:47,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:04:47" (3/3) ... [2021-01-07 05:04:47,170 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2021-01-07 05:04:47,177 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:04:47,182 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2021-01-07 05:04:47,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-01-07 05:04:47,241 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:04:47,242 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:04:47,242 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:04:47,242 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:04:47,242 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:04:47,242 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:04:47,243 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:04:47,243 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:04:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-01-07 05:04:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-07 05:04:47,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:47,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:47,273 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:47,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:47,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029043, now seen corresponding path program 1 times [2021-01-07 05:04:47,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:47,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518793687] [2021-01-07 05:04:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518793687] [2021-01-07 05:04:47,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:47,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:04:47,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126903287] [2021-01-07 05:04:47,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:04:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:04:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:04:47,565 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2021-01-07 05:04:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:47,663 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-01-07 05:04:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:04:47,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-07 05:04:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:47,694 INFO L225 Difference]: With dead ends: 27 [2021-01-07 05:04:47,694 INFO L226 Difference]: Without dead ends: 25 [2021-01-07 05:04:47,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:04:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-07 05:04:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-07 05:04:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-07 05:04:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-07 05:04:47,739 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2021-01-07 05:04:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:47,739 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-07 05:04:47,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:04:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-07 05:04:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-07 05:04:47,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:47,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:47,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:04:47,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:47,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029044, now seen corresponding path program 1 times [2021-01-07 05:04:47,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:47,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943496610] [2021-01-07 05:04:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:47,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943496610] [2021-01-07 05:04:47,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:47,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:04:47,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168252655] [2021-01-07 05:04:47,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:04:47,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:04:47,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:47,818 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2021-01-07 05:04:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:47,853 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-01-07 05:04:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:47,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-01-07 05:04:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:47,855 INFO L225 Difference]: With dead ends: 24 [2021-01-07 05:04:47,856 INFO L226 Difference]: Without dead ends: 24 [2021-01-07 05:04:47,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-07 05:04:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-07 05:04:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-07 05:04:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-07 05:04:47,861 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2021-01-07 05:04:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:47,861 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-07 05:04:47,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:04:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-07 05:04:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-07 05:04:47,862 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:47,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:47,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:04:47,863 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-01-07 05:04:47,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:47,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709089493] [2021-01-07 05:04:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:47,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709089493] [2021-01-07 05:04:47,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:47,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:04:47,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206992569] [2021-01-07 05:04:47,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:04:47,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:04:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:47,911 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2021-01-07 05:04:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:47,938 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-01-07 05:04:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:47,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-01-07 05:04:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:47,940 INFO L225 Difference]: With dead ends: 41 [2021-01-07 05:04:47,940 INFO L226 Difference]: Without dead ends: 41 [2021-01-07 05:04:47,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-07 05:04:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2021-01-07 05:04:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-07 05:04:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-01-07 05:04:47,947 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2021-01-07 05:04:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:47,948 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-01-07 05:04:47,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:04:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-01-07 05:04:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-07 05:04:47,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:47,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:47,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:04:47,950 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-01-07 05:04:47,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:47,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820043718] [2021-01-07 05:04:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:48,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820043718] [2021-01-07 05:04:48,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:48,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:04:48,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872189096] [2021-01-07 05:04:48,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:04:48,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:04:48,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:04:48,048 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2021-01-07 05:04:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:48,170 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-01-07 05:04:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:48,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-07 05:04:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:48,173 INFO L225 Difference]: With dead ends: 45 [2021-01-07 05:04:48,174 INFO L226 Difference]: Without dead ends: 45 [2021-01-07 05:04:48,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:04:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-07 05:04:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2021-01-07 05:04:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-07 05:04:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-07 05:04:48,191 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2021-01-07 05:04:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:48,191 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-07 05:04:48,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:04:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-07 05:04:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:04:48,194 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:48,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:48,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:04:48,196 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1954750824, now seen corresponding path program 1 times [2021-01-07 05:04:48,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:48,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7190243] [2021-01-07 05:04:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:48,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7190243] [2021-01-07 05:04:48,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:48,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:04:48,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077330315] [2021-01-07 05:04:48,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:04:48,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:04:48,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:48,302 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2021-01-07 05:04:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:48,376 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-01-07 05:04:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:48,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-07 05:04:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:48,377 INFO L225 Difference]: With dead ends: 28 [2021-01-07 05:04:48,378 INFO L226 Difference]: Without dead ends: 28 [2021-01-07 05:04:48,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:04:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-07 05:04:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-07 05:04:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:04:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-01-07 05:04:48,382 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-01-07 05:04:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:48,382 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-01-07 05:04:48,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:04:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-01-07 05:04:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:04:48,383 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:48,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:48,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-07 05:04:48,384 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1954750823, now seen corresponding path program 1 times [2021-01-07 05:04:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:48,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145238723] [2021-01-07 05:04:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:48,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145238723] [2021-01-07 05:04:48,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:48,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:04:48,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697951652] [2021-01-07 05:04:48,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:04:48,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:48,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:04:48,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:04:48,488 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 6 states. [2021-01-07 05:04:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:48,611 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-01-07 05:04:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:04:48,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-07 05:04:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:48,613 INFO L225 Difference]: With dead ends: 38 [2021-01-07 05:04:48,613 INFO L226 Difference]: Without dead ends: 38 [2021-01-07 05:04:48,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:04:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-07 05:04:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-01-07 05:04:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-07 05:04:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-01-07 05:04:48,620 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2021-01-07 05:04:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:48,621 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-01-07 05:04:48,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:04:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-01-07 05:04:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:04:48,622 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:48,622 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:48,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-07 05:04:48,622 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:48,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:48,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-01-07 05:04:48,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:48,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021012307] [2021-01-07 05:04:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021012307] [2021-01-07 05:04:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810414960] [2021-01-07 05:04:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-07 05:04:48,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:48,875 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:04:48,876 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:48,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:48,889 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:48,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:04:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:48,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:48,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-07 05:04:48,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771286804] [2021-01-07 05:04:48,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:04:48,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:48,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:04:48,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:04:48,956 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 6 states. [2021-01-07 05:04:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:49,081 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-01-07 05:04:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:04:49,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-07 05:04:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:49,083 INFO L225 Difference]: With dead ends: 48 [2021-01-07 05:04:49,083 INFO L226 Difference]: Without dead ends: 48 [2021-01-07 05:04:49,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:04:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-07 05:04:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2021-01-07 05:04:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:04:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-01-07 05:04:49,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-01-07 05:04:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:49,088 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-01-07 05:04:49,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:04:49,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-01-07 05:04:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:04:49,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:49,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:49,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-07 05:04:49,305 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:49,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1485608773, now seen corresponding path program 1 times [2021-01-07 05:04:49,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:49,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508661891] [2021-01-07 05:04:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:49,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508661891] [2021-01-07 05:04:49,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:49,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:04:49,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896129875] [2021-01-07 05:04:49,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:04:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:04:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:04:49,419 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2021-01-07 05:04:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:49,522 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-01-07 05:04:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:04:49,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-07 05:04:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:49,524 INFO L225 Difference]: With dead ends: 58 [2021-01-07 05:04:49,524 INFO L226 Difference]: Without dead ends: 58 [2021-01-07 05:04:49,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:04:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-07 05:04:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-01-07 05:04:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-07 05:04:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-07 05:04:49,529 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2021-01-07 05:04:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:49,529 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-07 05:04:49,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:04:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-07 05:04:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:04:49,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:49,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:49,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-07 05:04:49,531 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2108293945, now seen corresponding path program 1 times [2021-01-07 05:04:49,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:49,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119574119] [2021-01-07 05:04:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:49,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119574119] [2021-01-07 05:04:49,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:49,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-07 05:04:49,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746285873] [2021-01-07 05:04:49,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:04:49,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:04:49,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:04:49,621 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2021-01-07 05:04:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:49,707 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-01-07 05:04:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:04:49,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-01-07 05:04:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:49,708 INFO L225 Difference]: With dead ends: 46 [2021-01-07 05:04:49,708 INFO L226 Difference]: Without dead ends: 46 [2021-01-07 05:04:49,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:04:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-07 05:04:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2021-01-07 05:04:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:04:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-07 05:04:49,712 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2021-01-07 05:04:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:49,712 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-07 05:04:49,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:04:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-07 05:04:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-07 05:04:49,713 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:49,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:49,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-07 05:04:49,713 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash 439942402, now seen corresponding path program 1 times [2021-01-07 05:04:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:49,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941559465] [2021-01-07 05:04:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:49,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941559465] [2021-01-07 05:04:49,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:04:49,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:04:49,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021388850] [2021-01-07 05:04:49,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:04:49,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:04:49,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:49,828 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2021-01-07 05:04:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:49,845 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-01-07 05:04:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:04:49,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-01-07 05:04:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:49,847 INFO L225 Difference]: With dead ends: 27 [2021-01-07 05:04:49,847 INFO L226 Difference]: Without dead ends: 24 [2021-01-07 05:04:49,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:04:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-07 05:04:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-07 05:04:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-07 05:04:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-07 05:04:49,851 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-01-07 05:04:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:49,851 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-07 05:04:49,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:04:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-07 05:04:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-07 05:04:49,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:49,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:49,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-07 05:04:49,852 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash 755017713, now seen corresponding path program 1 times [2021-01-07 05:04:49,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:49,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434005224] [2021-01-07 05:04:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434005224] [2021-01-07 05:04:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394243300] [2021-01-07 05:04:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:50,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-07 05:04:50,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:50,079 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-01-07 05:04:50,080 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:50,084 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:50,085 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:50,085 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-07 05:04:50,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-07 05:04:50,247 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:50,247 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-01-07 05:04:50,249 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:50,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:50,263 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:50,263 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2021-01-07 05:04:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:50,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:04:50,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 11 [2021-01-07 05:04:50,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082262969] [2021-01-07 05:04:50,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:04:50,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:04:50,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-01-07 05:04:50,298 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 8 states. [2021-01-07 05:04:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:50,442 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-01-07 05:04:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:04:50,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-01-07 05:04:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:50,444 INFO L225 Difference]: With dead ends: 32 [2021-01-07 05:04:50,444 INFO L226 Difference]: Without dead ends: 21 [2021-01-07 05:04:50,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-01-07 05:04:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-07 05:04:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-07 05:04:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-07 05:04:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-07 05:04:50,446 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2021-01-07 05:04:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:50,447 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-07 05:04:50,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:04:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-07 05:04:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-07 05:04:50,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:50,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:50,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:50,662 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:50,663 INFO L82 PathProgramCache]: Analyzing trace with hash -524845965, now seen corresponding path program 1 times [2021-01-07 05:04:50,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:50,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467637469] [2021-01-07 05:04:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:50,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467637469] [2021-01-07 05:04:50,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849622277] [2021-01-07 05:04:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-07 05:04:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:50,853 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-01-07 05:04:50,854 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:50,862 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:50,864 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:04:50,864 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-01-07 05:04:50,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-07 05:04:50,986 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:50,987 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-01-07 05:04:50,988 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:50,999 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:51,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:51,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:3 [2021-01-07 05:04:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:51,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:04:51,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 12 [2021-01-07 05:04:51,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019541483] [2021-01-07 05:04:51,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-07 05:04:51,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-07 05:04:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:04:51,024 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2021-01-07 05:04:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:51,226 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-01-07 05:04:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:04:51,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-07 05:04:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:51,227 INFO L225 Difference]: With dead ends: 32 [2021-01-07 05:04:51,228 INFO L226 Difference]: Without dead ends: 25 [2021-01-07 05:04:51,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:04:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-07 05:04:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-01-07 05:04:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-07 05:04:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-07 05:04:51,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2021-01-07 05:04:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:51,230 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-07 05:04:51,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-07 05:04:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-07 05:04:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-07 05:04:51,231 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:51,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:51,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-07 05:04:51,442 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:51,443 INFO L82 PathProgramCache]: Analyzing trace with hash -547316234, now seen corresponding path program 1 times [2021-01-07 05:04:51,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:51,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639059107] [2021-01-07 05:04:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639059107] [2021-01-07 05:04:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709735818] [2021-01-07 05:04:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:51,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-07 05:04:51,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:51,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:51,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-07 05:04:51,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926546895] [2021-01-07 05:04:51,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-07 05:04:51,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:51,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-07 05:04:51,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:04:51,753 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 13 states. [2021-01-07 05:04:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:51,881 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-07 05:04:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:04:51,882 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2021-01-07 05:04:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:51,882 INFO L225 Difference]: With dead ends: 34 [2021-01-07 05:04:51,882 INFO L226 Difference]: Without dead ends: 34 [2021-01-07 05:04:51,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:04:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-07 05:04:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-01-07 05:04:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:04:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-07 05:04:51,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2021-01-07 05:04:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:51,886 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-07 05:04:51,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-07 05:04:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-07 05:04:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-07 05:04:51,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:51,887 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:52,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:52,103 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash -931353202, now seen corresponding path program 2 times [2021-01-07 05:04:52,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:52,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887564941] [2021-01-07 05:04:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-07 05:04:52,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887564941] [2021-01-07 05:04:52,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370904811] [2021-01-07 05:04:52,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:52,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:04:52,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:52,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-07 05:04:52,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:52,350 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-01-07 05:04:52,350 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:52,358 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:52,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:04:52,360 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-01-07 05:04:52,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-07 05:04:52,629 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:52,630 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-01-07 05:04:52,632 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:52,641 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:52,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:52,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:3 [2021-01-07 05:04:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:52,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:52,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 16 [2021-01-07 05:04:52,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897786602] [2021-01-07 05:04:52,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-07 05:04:52,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:52,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-07 05:04:52,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:04:52,690 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2021-01-07 05:04:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:53,549 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-01-07 05:04:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-07 05:04:53,549 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2021-01-07 05:04:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:53,551 INFO L225 Difference]: With dead ends: 81 [2021-01-07 05:04:53,551 INFO L226 Difference]: Without dead ends: 35 [2021-01-07 05:04:53,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-01-07 05:04:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-07 05:04:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-01-07 05:04:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-07 05:04:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-01-07 05:04:53,573 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-01-07 05:04:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:53,573 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-01-07 05:04:53,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-07 05:04:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-01-07 05:04:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-07 05:04:53,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:53,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:53,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-07 05:04:53,776 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash -711322097, now seen corresponding path program 1 times [2021-01-07 05:04:53,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:53,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139707250] [2021-01-07 05:04:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:53,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139707250] [2021-01-07 05:04:53,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92440508] [2021-01-07 05:04:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:53,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-07 05:04:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:54,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:54,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-01-07 05:04:54,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723644003] [2021-01-07 05:04:54,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-07 05:04:54,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-07 05:04:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-01-07 05:04:54,132 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2021-01-07 05:04:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:54,280 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-01-07 05:04:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:04:54,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2021-01-07 05:04:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:54,281 INFO L225 Difference]: With dead ends: 41 [2021-01-07 05:04:54,282 INFO L226 Difference]: Without dead ends: 41 [2021-01-07 05:04:54,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-01-07 05:04:54,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-07 05:04:54,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-01-07 05:04:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-07 05:04:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-01-07 05:04:54,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2021-01-07 05:04:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:54,285 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-01-07 05:04:54,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-07 05:04:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-01-07 05:04:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-07 05:04:54,286 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:54,287 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:54,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:04:54,502 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2043154713, now seen corresponding path program 2 times [2021-01-07 05:04:54,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:54,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139103889] [2021-01-07 05:04:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:54,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139103889] [2021-01-07 05:04:54,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457197925] [2021-01-07 05:04:54,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:54,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:04:54,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:54,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-07 05:04:54,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:54,888 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-01-07 05:04:54,889 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:54,895 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:54,897 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:04:54,899 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2021-01-07 05:04:55,281 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:55,281 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-01-07 05:04:55,284 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-07 05:04:55,297 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:55,301 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-07 05:04:55,305 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-07 05:04:55,307 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:55,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2021-01-07 05:04:55,349 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:04:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:55,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:55,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-01-07 05:04:55,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530603458] [2021-01-07 05:04:55,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:04:55,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:55,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:04:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:04:55,470 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2021-01-07 05:04:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:57,147 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-07 05:04:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-07 05:04:57,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2021-01-07 05:04:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:57,148 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:04:57,148 INFO L226 Difference]: Without dead ends: 54 [2021-01-07 05:04:57,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2021-01-07 05:04:57,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-07 05:04:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-01-07 05:04:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-07 05:04:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-07 05:04:57,153 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 37 [2021-01-07 05:04:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:57,154 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-07 05:04:57,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:04:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-07 05:04:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-07 05:04:57,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:57,155 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:57,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-07 05:04:57,367 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:57,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1644156286, now seen corresponding path program 3 times [2021-01-07 05:04:57,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:57,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930632037] [2021-01-07 05:04:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:57,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930632037] [2021-01-07 05:04:57,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659523597] [2021-01-07 05:04:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:57,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-07 05:04:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-07 05:04:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:58,060 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-01-07 05:04:58,061 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:58,067 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:58,068 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:04:58,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-01-07 05:04:58,221 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-07 05:04:58,222 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:58,224 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:58,224 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:58,225 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-07 05:04:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:58,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:58,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-01-07 05:04:58,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231746672] [2021-01-07 05:04:58,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-07 05:04:58,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:58,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-07 05:04:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-01-07 05:04:58,238 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 23 states. [2021-01-07 05:04:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:04:58,783 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-01-07 05:04:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-07 05:04:58,784 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2021-01-07 05:04:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:04:58,785 INFO L225 Difference]: With dead ends: 80 [2021-01-07 05:04:58,785 INFO L226 Difference]: Without dead ends: 55 [2021-01-07 05:04:58,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-01-07 05:04:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-07 05:04:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-01-07 05:04:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-07 05:04:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-01-07 05:04:58,789 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2021-01-07 05:04:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:04:58,790 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-01-07 05:04:58,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-07 05:04:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-01-07 05:04:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-07 05:04:58,791 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:04:58,791 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:04:59,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-07 05:04:59,006 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:04:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:04:59,006 INFO L82 PathProgramCache]: Analyzing trace with hash -241928763, now seen corresponding path program 4 times [2021-01-07 05:04:59,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:04:59,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091134518] [2021-01-07 05:04:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:04:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:04:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:59,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091134518] [2021-01-07 05:04:59,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645244128] [2021-01-07 05:04:59,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:04:59,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:04:59,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:04:59,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-07 05:04:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:04:59,384 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:04:59,385 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:59,391 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:59,392 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:59,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:04:59,467 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-07 05:04:59,468 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:04:59,474 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:59,475 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:59,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-01-07 05:04:59,689 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:59,690 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-01-07 05:04:59,691 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-07 05:04:59,701 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:04:59,702 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:04:59,703 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2021-01-07 05:04:59,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:04:59,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:04:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:04:59,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:04:59,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2021-01-07 05:04:59,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19910725] [2021-01-07 05:04:59,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:04:59,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:04:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:04:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:04:59,921 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 25 states. [2021-01-07 05:05:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:00,805 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-01-07 05:05:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-07 05:05:00,806 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2021-01-07 05:05:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:00,806 INFO L225 Difference]: With dead ends: 61 [2021-01-07 05:05:00,806 INFO L226 Difference]: Without dead ends: 61 [2021-01-07 05:05:00,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-01-07 05:05:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-07 05:05:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-01-07 05:05:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-07 05:05:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-01-07 05:05:00,810 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 51 [2021-01-07 05:05:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:00,811 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-01-07 05:05:00,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:05:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-01-07 05:05:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-07 05:05:00,812 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:05:00,812 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:05:01,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-07 05:05:01,027 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:05:01,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:05:01,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1247620637, now seen corresponding path program 5 times [2021-01-07 05:05:01,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:05:01,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610438905] [2021-01-07 05:05:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:05:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:01,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610438905] [2021-01-07 05:05:01,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008587005] [2021-01-07 05:05:01,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:05:01,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-07 05:05:01,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:05:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-07 05:05:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:05:01,748 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-01-07 05:05:01,749 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:01,755 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:01,757 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:05:01,757 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-01-07 05:05:01,926 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-07 05:05:01,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:01,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:01,928 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:01,929 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-07 05:05:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:01,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:05:01,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-01-07 05:05:01,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790805340] [2021-01-07 05:05:01,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-07 05:05:01,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:05:01,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-07 05:05:01,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-01-07 05:05:01,942 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 26 states. [2021-01-07 05:05:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:02,671 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2021-01-07 05:05:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-07 05:05:02,671 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2021-01-07 05:05:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:02,672 INFO L225 Difference]: With dead ends: 96 [2021-01-07 05:05:02,672 INFO L226 Difference]: Without dead ends: 65 [2021-01-07 05:05:02,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-01-07 05:05:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-07 05:05:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-01-07 05:05:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-07 05:05:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-01-07 05:05:02,676 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2021-01-07 05:05:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:02,677 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-01-07 05:05:02,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-07 05:05:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-01-07 05:05:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-07 05:05:02,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:05:02,678 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:05:02,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:05:02,887 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:05:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:05:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash 757760416, now seen corresponding path program 6 times [2021-01-07 05:05:02,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:05:02,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186554214] [2021-01-07 05:05:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:05:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186554214] [2021-01-07 05:05:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878989929] [2021-01-07 05:05:03,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:05:03,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-07 05:05:03,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:05:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-07 05:05:03,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:05:03,321 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:05:03,322 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:03,328 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:03,328 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:03,328 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:05:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:03,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:05:03,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-01-07 05:05:03,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437860981] [2021-01-07 05:05:03,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-07 05:05:03,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:05:03,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-07 05:05:03,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-01-07 05:05:03,791 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 28 states. [2021-01-07 05:05:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:04,417 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-01-07 05:05:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-07 05:05:04,418 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2021-01-07 05:05:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:04,419 INFO L225 Difference]: With dead ends: 71 [2021-01-07 05:05:04,419 INFO L226 Difference]: Without dead ends: 71 [2021-01-07 05:05:04,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-01-07 05:05:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-07 05:05:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-01-07 05:05:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-07 05:05:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-01-07 05:05:04,422 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2021-01-07 05:05:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:04,423 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-01-07 05:05:04,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-07 05:05:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-01-07 05:05:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-07 05:05:04,424 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:05:04,424 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:05:04,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:05:04,630 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:05:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:05:04,631 INFO L82 PathProgramCache]: Analyzing trace with hash 586394040, now seen corresponding path program 7 times [2021-01-07 05:05:04,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:05:04,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443999941] [2021-01-07 05:05:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:05:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:05,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443999941] [2021-01-07 05:05:05,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565147818] [2021-01-07 05:05:05,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:05:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:05,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-07 05:05:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:05:05,427 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-01-07 05:05:05,428 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:05,435 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:05,436 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:05:05,436 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-01-07 05:05:05,604 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-07 05:05:05,605 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:05,607 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:05,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:05,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-07 05:05:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:05,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:05:05,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-01-07 05:05:05,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140375186] [2021-01-07 05:05:05,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-07 05:05:05,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:05:05,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-07 05:05:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-01-07 05:05:05,627 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 29 states. [2021-01-07 05:05:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:06,646 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-01-07 05:05:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-07 05:05:06,647 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2021-01-07 05:05:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:06,648 INFO L225 Difference]: With dead ends: 112 [2021-01-07 05:05:06,648 INFO L226 Difference]: Without dead ends: 75 [2021-01-07 05:05:06,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-01-07 05:05:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-07 05:05:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-01-07 05:05:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-07 05:05:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-07 05:05:06,651 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2021-01-07 05:05:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:06,652 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-07 05:05:06,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-07 05:05:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-07 05:05:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-07 05:05:06,653 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:05:06,653 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:05:06,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:05:06,859 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:05:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:05:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash 8172923, now seen corresponding path program 8 times [2021-01-07 05:05:06,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:05:06,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652322215] [2021-01-07 05:05:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:05:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652322215] [2021-01-07 05:05:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442521338] [2021-01-07 05:05:07,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:05:07,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:05:07,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:05:07,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-07 05:05:07,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:05:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:07,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:05:07,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-01-07 05:05:07,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119944040] [2021-01-07 05:05:07,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-07 05:05:07,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:05:07,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-07 05:05:07,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-01-07 05:05:07,539 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2021-01-07 05:05:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:08,089 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-01-07 05:05:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-07 05:05:08,093 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2021-01-07 05:05:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:08,094 INFO L225 Difference]: With dead ends: 81 [2021-01-07 05:05:08,094 INFO L226 Difference]: Without dead ends: 81 [2021-01-07 05:05:08,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2021-01-07 05:05:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-07 05:05:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-01-07 05:05:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-07 05:05:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-01-07 05:05:08,096 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 71 [2021-01-07 05:05:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:08,096 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-01-07 05:05:08,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-07 05:05:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-01-07 05:05:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-07 05:05:08,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:05:08,100 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:05:08,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-07 05:05:08,311 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:05:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:05:08,312 INFO L82 PathProgramCache]: Analyzing trace with hash -813150893, now seen corresponding path program 9 times [2021-01-07 05:05:08,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:05:08,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717305859] [2021-01-07 05:05:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:05:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:08,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717305859] [2021-01-07 05:05:08,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126457992] [2021-01-07 05:05:08,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:05:09,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-07 05:05:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:05:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-07 05:05:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:05:09,328 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-01-07 05:05:09,329 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:09,335 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:09,336 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:05:09,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-01-07 05:05:09,541 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-07 05:05:09,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:09,544 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:09,544 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:09,544 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-07 05:05:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:09,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:05:09,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2021-01-07 05:05:09,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872900209] [2021-01-07 05:05:09,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-07 05:05:09,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:05:09,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-07 05:05:09,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-01-07 05:05:09,563 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 32 states. [2021-01-07 05:05:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:10,731 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-01-07 05:05:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-07 05:05:10,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2021-01-07 05:05:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:10,733 INFO L225 Difference]: With dead ends: 128 [2021-01-07 05:05:10,733 INFO L226 Difference]: Without dead ends: 85 [2021-01-07 05:05:10,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-01-07 05:05:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-07 05:05:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-01-07 05:05:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-07 05:05:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-01-07 05:05:10,737 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2021-01-07 05:05:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:10,737 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-01-07 05:05:10,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-07 05:05:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-01-07 05:05:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-07 05:05:10,738 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:05:10,738 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:05:10,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:05:10,941 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:05:10,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:05:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1404289366, now seen corresponding path program 10 times [2021-01-07 05:05:10,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:05:10,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435364727] [2021-01-07 05:05:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:05:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435364727] [2021-01-07 05:05:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302199370] [2021-01-07 05:05:11,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:05:11,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:05:11,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:05:11,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-07 05:05:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:05:11,406 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:05:11,407 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:11,412 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:11,413 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:11,413 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:05:11,513 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-07 05:05:11,514 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:11,520 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:11,521 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:11,521 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-01-07 05:05:11,993 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:11,993 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-01-07 05:05:11,995 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-07 05:05:12,006 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:12,010 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:12,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2021-01-07 05:05:12,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:05:12,073 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:05:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 72 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:12,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:05:12,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 33 [2021-01-07 05:05:12,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827481568] [2021-01-07 05:05:12,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-07 05:05:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:05:12,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-07 05:05:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-01-07 05:05:12,294 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 34 states. [2021-01-07 05:05:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:13,923 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-01-07 05:05:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-07 05:05:13,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2021-01-07 05:05:13,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:13,924 INFO L225 Difference]: With dead ends: 91 [2021-01-07 05:05:13,924 INFO L226 Difference]: Without dead ends: 91 [2021-01-07 05:05:13,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-01-07 05:05:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-07 05:05:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-01-07 05:05:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-07 05:05:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-01-07 05:05:13,927 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2021-01-07 05:05:13,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:13,927 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-01-07 05:05:13,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-07 05:05:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-01-07 05:05:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-07 05:05:13,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:05:13,928 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:05:14,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-07 05:05:14,129 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:05:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:05:14,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1023424274, now seen corresponding path program 11 times [2021-01-07 05:05:14,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:05:14,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610994680] [2021-01-07 05:05:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:05:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:14,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610994680] [2021-01-07 05:05:14,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920776481] [2021-01-07 05:05:14,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:05:15,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-07 05:05:15,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:05:15,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-07 05:05:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:05:15,358 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-01-07 05:05:15,359 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:15,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:15,369 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:05:15,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2021-01-07 05:05:15,578 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-07 05:05:15,579 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:15,581 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:15,581 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:15,581 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-07 05:05:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:15,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:05:15,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2021-01-07 05:05:15,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415295649] [2021-01-07 05:05:15,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-07 05:05:15,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:05:15,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-07 05:05:15,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-01-07 05:05:15,605 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 35 states. [2021-01-07 05:05:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:16,989 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2021-01-07 05:05:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-07 05:05:16,990 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2021-01-07 05:05:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:16,991 INFO L225 Difference]: With dead ends: 144 [2021-01-07 05:05:16,991 INFO L226 Difference]: Without dead ends: 95 [2021-01-07 05:05:16,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-01-07 05:05:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-07 05:05:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-01-07 05:05:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-07 05:05:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-01-07 05:05:16,996 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2021-01-07 05:05:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:16,996 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-01-07 05:05:16,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-07 05:05:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-01-07 05:05:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-07 05:05:16,997 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:05:16,997 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:05:17,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:05:17,201 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:05:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:05:17,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1390914255, now seen corresponding path program 12 times [2021-01-07 05:05:17,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:05:17,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926253433] [2021-01-07 05:05:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:05:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:05:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:05:17,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926253433] [2021-01-07 05:05:17,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349675012] [2021-01-07 05:05:17,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:05:18,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-07 05:05:18,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:05:18,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-07 05:05:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:05:18,043 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:05:18,043 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:18,048 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:18,049 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:18,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2021-01-07 05:05:18,118 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-07 05:05:18,119 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:05:18,125 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:18,126 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:05:18,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2021-01-07 05:05:18,396 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:18,397 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-01-07 05:05:18,398 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-07 05:05:18,410 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:05:18,412 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-07 05:05:18,413 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:05:18,413 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-01-07 05:05:18,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:05:18,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:05:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-01-07 05:05:18,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:05:18,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 27 [2021-01-07 05:05:18,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232722008] [2021-01-07 05:05:18,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-07 05:05:18,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:05:18,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-07 05:05:18,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-01-07 05:05:18,613 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 28 states. [2021-01-07 05:05:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:05:20,017 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-01-07 05:05:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-07 05:05:20,019 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2021-01-07 05:05:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:05:20,019 INFO L225 Difference]: With dead ends: 94 [2021-01-07 05:05:20,019 INFO L226 Difference]: Without dead ends: 0 [2021-01-07 05:05:20,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2021-01-07 05:05:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-07 05:05:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-07 05:05:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-07 05:05:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-07 05:05:20,021 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2021-01-07 05:05:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:05:20,021 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-07 05:05:20,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-07 05:05:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-07 05:05:20,021 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-07 05:05:20,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-07 05:05:20,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:05:20 BoogieIcfgContainer [2021-01-07 05:05:20,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:05:20,229 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:05:20,229 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:05:20,229 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:05:20,229 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:04:47" (3/4) ... [2021-01-07 05:05:20,235 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-07 05:05:20,246 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-07 05:05:20,246 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-07 05:05:20,246 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-01-07 05:05:20,299 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/openbsd_cstrnlen-alloca-1.i-witness.graphml [2021-01-07 05:05:20,299 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:05:20,300 INFO L168 Benchmark]: Toolchain (without parser) took 34446.12 ms. Allocated memory was 158.3 MB in the beginning and 361.8 MB in the end (delta: 203.4 MB). Free memory was 132.4 MB in the beginning and 247.9 MB in the end (delta: -115.5 MB). Peak memory consumption was 88.6 MB. Max. memory is 8.0 GB. [2021-01-07 05:05:20,304 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 158.3 MB. Free memory is still 129.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:05:20,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 582.01 ms. Allocated memory is still 158.3 MB. Free memory was 132.1 MB in the beginning and 111.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:05:20,305 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.87 ms. Allocated memory is still 158.3 MB. Free memory was 111.6 MB in the beginning and 109.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:05:20,305 INFO L168 Benchmark]: Boogie Preprocessor took 61.31 ms. Allocated memory is still 158.3 MB. Free memory was 109.8 MB in the beginning and 108.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:05:20,306 INFO L168 Benchmark]: RCFGBuilder took 569.13 ms. Allocated memory is still 158.3 MB. Free memory was 108.5 MB in the beginning and 126.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. [2021-01-07 05:05:20,306 INFO L168 Benchmark]: TraceAbstraction took 33070.67 ms. Allocated memory was 158.3 MB in the beginning and 361.8 MB in the end (delta: 203.4 MB). Free memory was 125.7 MB in the beginning and 250.7 MB in the end (delta: -125.0 MB). Peak memory consumption was 78.6 MB. Max. memory is 8.0 GB. [2021-01-07 05:05:20,308 INFO L168 Benchmark]: Witness Printer took 70.34 ms. Allocated memory is still 361.8 MB. Free memory was 250.7 MB in the beginning and 247.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:05:20,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 158.3 MB. Free memory is still 129.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 582.01 ms. Allocated memory is still 158.3 MB. Free memory was 132.1 MB in the beginning and 111.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 78.87 ms. Allocated memory is still 158.3 MB. Free memory was 111.6 MB in the beginning and 109.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.31 ms. Allocated memory is still 158.3 MB. Free memory was 109.8 MB in the beginning and 108.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 569.13 ms. Allocated memory is still 158.3 MB. Free memory was 108.5 MB in the beginning and 126.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 33070.67 ms. Allocated memory was 158.3 MB in the beginning and 361.8 MB in the end (delta: 203.4 MB). Free memory was 125.7 MB in the beginning and 250.7 MB in the end (delta: -125.0 MB). Peak memory consumption was 78.6 MB. Max. memory is 8.0 GB. * Witness Printer took 70.34 ms. Allocated memory is still 361.8 MB. Free memory was 250.7 MB in the beginning and 247.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32.9s, OverallIterations: 26, TraceHistogramMax: 9, AutomataDifference: 14.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 672 SDtfs, 3696 SDslu, 6206 SDs, 0 SdLazy, 7732 SolverSat, 568 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1265 GetRequests, 712 SyntacticMatches, 10 SemanticMatches, 543 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 14.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 142 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 1796 NumberOfCodeBlocks, 1770 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 1753 ConstructedInterpolants, 114 QuantifiedInterpolants, 1036681 SizeOfPredicates, 188 NumberOfNonLiveVariables, 2655 ConjunctsInSsa, 641 ConjunctsInUnsatCore, 43 InterpolantComputations, 11 PerfectInterpolantSequences, 860/3622 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...