/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:16:56,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:16:56,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:16:56,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 00:16:56,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:16:56,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:16:56,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:16:56,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:16:56,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:16:56,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:16:56,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:16:56,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:16:56,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:16:56,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:16:56,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:16:56,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:16:56,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:16:56,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:16:56,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:16:56,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:16:56,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:16:56,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:16:56,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:16:56,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:16:56,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:16:56,493 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:16:56,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:16:56,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:16:56,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:16:56,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:16:56,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:16:56,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:16:56,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:16:56,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:16:56,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:16:56,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:16:56,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:16:56,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:16:56,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:16:56,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:16:56,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:16:56,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:16:56,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:16:56,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:16:56,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:16:56,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:16:56,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:16:56,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:16:57,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:16:57,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:16:57,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:16:57,009 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:16:57,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i [2020-12-23 00:16:57,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/475736667/d8833ca0e33f48228b7d9b6a1d88fc39/FLAG9a31dba93 [2020-12-23 00:16:57,702 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:16:57,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i [2020-12-23 00:16:57,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/475736667/d8833ca0e33f48228b7d9b6a1d88fc39/FLAG9a31dba93 [2020-12-23 00:16:58,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/475736667/d8833ca0e33f48228b7d9b6a1d88fc39 [2020-12-23 00:16:58,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:16:58,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:16:58,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:16:58,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:16:58,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:16:58,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ff3143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58, skipping insertion in model container [2020-12-23 00:16:58,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:16:58,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:16:58,328 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i[999,1012] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:16:58,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:16:58,365 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:16:58,380 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i[999,1012] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:16:58,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:16:58,408 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:16:58,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58 WrapperNode [2020-12-23 00:16:58,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:16:58,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:16:58,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:16:58,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:16:58,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:16:58,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:16:58,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:16:58,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:16:58,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:16:58,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:16:58,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:16:58,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:16:58,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (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 [2020-12-23 00:16:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 00:16:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:16:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 00:16:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:16:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:16:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 00:16:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:16:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:16:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:16:59,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:16:59,004 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 00:16:59,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:16:59 BoogieIcfgContainer [2020-12-23 00:16:59,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:16:59,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:16:59,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:16:59,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:16:59,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:16:58" (1/3) ... [2020-12-23 00:16:59,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352d8012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:16:59, skipping insertion in model container [2020-12-23 00:16:59,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (2/3) ... [2020-12-23 00:16:59,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352d8012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:16:59, skipping insertion in model container [2020-12-23 00:16:59,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:16:59" (3/3) ... [2020-12-23 00:16:59,016 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_cond_init.i [2020-12-23 00:16:59,025 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:16:59,030 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:16:59,053 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:16:59,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:16:59,095 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:16:59,095 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:16:59,095 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:16:59,096 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:16:59,096 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:16:59,096 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:16:59,096 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:16:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 00:16:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:16:59,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:59,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:59,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash 650130346, now seen corresponding path program 1 times [2020-12-23 00:16:59,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:59,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312161286] [2020-12-23 00:16:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:16:59,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312161286] [2020-12-23 00:16:59,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:16:59,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:16:59,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311498653] [2020-12-23 00:16:59,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:16:59,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:59,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:16:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:16:59,310 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 00:16:59,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:59,328 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-12-23 00:16:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:16:59,330 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 00:16:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:59,339 INFO L225 Difference]: With dead ends: 31 [2020-12-23 00:16:59,340 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 00:16:59,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:16:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 00:16:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 00:16:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 00:16:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 00:16:59,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2020-12-23 00:16:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:59,379 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 00:16:59,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:16:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 00:16:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:16:59,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:59,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:59,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:16:59,381 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash 220693081, now seen corresponding path program 1 times [2020-12-23 00:16:59,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:59,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949678038] [2020-12-23 00:16:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:16:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949678038] [2020-12-23 00:16:59,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:16:59,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:16:59,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169455948] [2020-12-23 00:16:59,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:16:59,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:16:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:16:59,446 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-23 00:16:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:59,489 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 00:16:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:16:59,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 00:16:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:59,491 INFO L225 Difference]: With dead ends: 35 [2020-12-23 00:16:59,491 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:16:59,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:16:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:16:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2020-12-23 00:16:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 00:16:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-23 00:16:59,498 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2020-12-23 00:16:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:59,498 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-23 00:16:59,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:16:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-23 00:16:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:16:59,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:59,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:59,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:16:59,500 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash 702319140, now seen corresponding path program 1 times [2020-12-23 00:16:59,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:59,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720164347] [2020-12-23 00:16:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:16:59,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720164347] [2020-12-23 00:16:59,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766147764] [2020-12-23 00:16:59,649 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 [2020-12-23 00:16:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:16:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:16:59,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:59,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:16:59,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386908760] [2020-12-23 00:16:59,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:16:59,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:59,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:16:59,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:16:59,833 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 5 states. [2020-12-23 00:16:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:59,901 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-12-23 00:16:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:16:59,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 00:16:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:59,903 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:16:59,904 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 00:16:59,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:16:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 00:16:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 21. [2020-12-23 00:16:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:16:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 00:16:59,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-12-23 00:16:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:59,911 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 00:16:59,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:16:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 00:16:59,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:16:59,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:59,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:00,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:17:00,127 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash 43755833, now seen corresponding path program 2 times [2020-12-23 00:17:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:00,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410230992] [2020-12-23 00:17:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:00,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410230992] [2020-12-23 00:17:00,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763925284] [2020-12-23 00:17:00,288 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:00,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:00,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:00,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:17:00,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:00,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:00,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:17:00,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319199327] [2020-12-23 00:17:00,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:17:00,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:00,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:17:00,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:00,459 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-12-23 00:17:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:00,541 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-12-23 00:17:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:17:00,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-23 00:17:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:00,544 INFO L225 Difference]: With dead ends: 59 [2020-12-23 00:17:00,544 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:17:00,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:17:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2020-12-23 00:17:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:17:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-23 00:17:00,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2020-12-23 00:17:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:00,553 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-23 00:17:00,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:17:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-23 00:17:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:17:00,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:00,554 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:00,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:00,768 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:00,770 INFO L82 PathProgramCache]: Analyzing trace with hash -749883580, now seen corresponding path program 3 times [2020-12-23 00:17:00,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:00,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811438261] [2020-12-23 00:17:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:00,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811438261] [2020-12-23 00:17:00,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406433230] [2020-12-23 00:17:00,922 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:01,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:17:01,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:17:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:01,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:01,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:17:01,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964301286] [2020-12-23 00:17:01,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:17:01,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:01,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:17:01,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:01,218 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-12-23 00:17:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:01,313 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-12-23 00:17:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:17:01,314 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-23 00:17:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:01,316 INFO L225 Difference]: With dead ends: 71 [2020-12-23 00:17:01,316 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:17:01,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:17:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 31. [2020-12-23 00:17:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:17:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-23 00:17:01,324 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2020-12-23 00:17:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:01,325 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-23 00:17:01,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:17:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-23 00:17:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:17:01,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:01,326 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:01,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:01,542 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:01,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:01,543 INFO L82 PathProgramCache]: Analyzing trace with hash -239814631, now seen corresponding path program 4 times [2020-12-23 00:17:01,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:01,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48573847] [2020-12-23 00:17:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:01,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48573847] [2020-12-23 00:17:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590845896] [2020-12-23 00:17:01,767 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:01,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:01,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:17:01,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:02,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:02,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:17:02,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245993475] [2020-12-23 00:17:02,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:17:02,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:02,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:17:02,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:02,100 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 8 states. [2020-12-23 00:17:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:02,218 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2020-12-23 00:17:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:17:02,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-23 00:17:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:02,220 INFO L225 Difference]: With dead ends: 83 [2020-12-23 00:17:02,220 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:17:02,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:17:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 36. [2020-12-23 00:17:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:17:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-23 00:17:02,228 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 28 [2020-12-23 00:17:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:02,229 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-23 00:17:02,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:17:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-23 00:17:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:17:02,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:02,231 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:02,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:02,445 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash -840242076, now seen corresponding path program 5 times [2020-12-23 00:17:02,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:02,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86640342] [2020-12-23 00:17:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:02,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86640342] [2020-12-23 00:17:02,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510560735] [2020-12-23 00:17:02,603 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:06,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:17:06,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:17:06,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:06,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:06,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:17:06,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670220174] [2020-12-23 00:17:06,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:17:06,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:17:06,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:06,643 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 9 states. [2020-12-23 00:17:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:06,745 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-12-23 00:17:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:17:06,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-12-23 00:17:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:06,747 INFO L225 Difference]: With dead ends: 95 [2020-12-23 00:17:06,747 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 00:17:06,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 00:17:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 41. [2020-12-23 00:17:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 00:17:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-12-23 00:17:06,756 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2020-12-23 00:17:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:06,756 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-12-23 00:17:06,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:17:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-12-23 00:17:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:17:06,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:06,758 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:06,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:17:06,972 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1601220345, now seen corresponding path program 6 times [2020-12-23 00:17:06,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:06,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820179401] [2020-12-23 00:17:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:07,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820179401] [2020-12-23 00:17:07,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087740911] [2020-12-23 00:17:07,187 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:09,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:17:09,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:17:09,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:09,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:09,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:17:09,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300941705] [2020-12-23 00:17:09,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:17:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:17:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:09,823 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-12-23 00:17:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:09,908 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2020-12-23 00:17:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:17:09,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-12-23 00:17:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:09,910 INFO L225 Difference]: With dead ends: 107 [2020-12-23 00:17:09,911 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 00:17:09,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 00:17:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 46. [2020-12-23 00:17:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:17:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-12-23 00:17:09,919 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 38 [2020-12-23 00:17:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:09,919 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-12-23 00:17:09,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:17:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-23 00:17:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:17:09,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:09,921 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:10,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:10,133 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash 58081668, now seen corresponding path program 7 times [2020-12-23 00:17:10,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:10,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718441029] [2020-12-23 00:17:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:10,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718441029] [2020-12-23 00:17:10,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539262166] [2020-12-23 00:17:10,320 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:10,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:17:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:10,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:10,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:17:10,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276308080] [2020-12-23 00:17:10,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:17:10,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:17:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:10,594 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 11 states. [2020-12-23 00:17:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:10,703 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-12-23 00:17:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:17:10,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-12-23 00:17:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:10,705 INFO L225 Difference]: With dead ends: 119 [2020-12-23 00:17:10,705 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 00:17:10,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 00:17:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 51. [2020-12-23 00:17:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 00:17:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-12-23 00:17:10,714 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 43 [2020-12-23 00:17:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:10,714 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-12-23 00:17:10,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:17:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-12-23 00:17:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:17:10,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:10,716 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:10,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:10,930 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash 726502873, now seen corresponding path program 8 times [2020-12-23 00:17:10,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:10,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179570410] [2020-12-23 00:17:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:11,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179570410] [2020-12-23 00:17:11,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402006236] [2020-12-23 00:17:11,121 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:11,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:11,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:11,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:17:11,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:11,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:11,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:17:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086527128] [2020-12-23 00:17:11,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:17:11,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:11,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:17:11,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:11,306 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 12 states. [2020-12-23 00:17:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:11,415 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2020-12-23 00:17:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:17:11,434 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-12-23 00:17:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:11,435 INFO L225 Difference]: With dead ends: 131 [2020-12-23 00:17:11,436 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:17:11,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:17:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 56. [2020-12-23 00:17:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:17:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-12-23 00:17:11,450 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 48 [2020-12-23 00:17:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:11,451 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-12-23 00:17:11,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:17:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-12-23 00:17:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:17:11,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:11,454 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:11,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:17:11,655 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:11,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1825460572, now seen corresponding path program 9 times [2020-12-23 00:17:11,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:11,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178312054] [2020-12-23 00:17:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:11,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178312054] [2020-12-23 00:17:11,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104275291] [2020-12-23 00:17:11,885 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 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