/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-examples/standard_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:47:15,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:47:15,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:47:15,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:47:15,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:47:15,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:47:15,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:47:15,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:47:15,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:47:15,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:47:15,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:47:15,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:47:15,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:47:15,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:47:15,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:47:15,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:47:15,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:47:15,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:47:15,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:47:15,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:47:15,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:47:15,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:47:15,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:47:15,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:47:15,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:47:15,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:47:15,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:47:15,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:47:15,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:47:15,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:47:15,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:47:15,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:47:15,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:47:15,415 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:47:15,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:47:15,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:47:15,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:47:15,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:47:15,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:47:15,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:47:15,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:47:15,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:47:15,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:47:15,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:47:15,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:47:15,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:47:15,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:47:15,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:47:15,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:47:15,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:47:15,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:47:15,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:47:15,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:47:15,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:47:15,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:47:15,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:47:15,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:47:15,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:47:15,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:47:15,933 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:47:15,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2021-01-06 09:47:16,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1abcdf05c/8aff833307274961a2b425b27c6e3768/FLAG1c0cd8bf5 [2021-01-06 09:47:16,742 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:47:16,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2021-01-06 09:47:16,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1abcdf05c/8aff833307274961a2b425b27c6e3768/FLAG1c0cd8bf5 [2021-01-06 09:47:17,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1abcdf05c/8aff833307274961a2b425b27c6e3768 [2021-01-06 09:47:17,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:47:17,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:47:17,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:17,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:47:17,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:47:17,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4491c0bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17, skipping insertion in model container [2021-01-06 09:47:17,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:47:17,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:47:17,300 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-examples/standard_copyInitSum_ground.i[860,873] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:47:17,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:17,335 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:47:17,351 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-examples/standard_copyInitSum_ground.i[860,873] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:47:17,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:17,380 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:47:17,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17 WrapperNode [2021-01-06 09:47:17,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:17,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:17,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:47:17,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:47:17,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:17,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:47:17,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:47:17,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:47:17,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (1/1) ... [2021-01-06 09:47:17,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:47:17,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:47:17,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:47:17,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:47:17,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (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 [2021-01-06 09:47:17,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:47:17,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:47:17,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:47:17,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:47:17,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:47:17,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:47:17,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:47:18,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:47:18,001 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 09:47:18,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:18 BoogieIcfgContainer [2021-01-06 09:47:18,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:47:18,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:47:18,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:47:18,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:47:18,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:47:17" (1/3) ... [2021-01-06 09:47:18,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76bc6ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:18, skipping insertion in model container [2021-01-06 09:47:18,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:17" (2/3) ... [2021-01-06 09:47:18,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76bc6ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:18, skipping insertion in model container [2021-01-06 09:47:18,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:18" (3/3) ... [2021-01-06 09:47:18,017 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2021-01-06 09:47:18,025 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:47:18,031 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:47:18,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:47:18,171 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:47:18,171 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:47:18,172 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:47:18,172 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:47:18,172 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:47:18,172 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:47:18,173 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:47:18,173 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:47:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 09:47:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:47:18,197 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:18,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:18,199 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash -952172836, now seen corresponding path program 1 times [2021-01-06 09:47:18,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:18,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209651608] [2021-01-06 09:47:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:18,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209651608] [2021-01-06 09:47:18,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:47:18,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:47:18,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821340098] [2021-01-06 09:47:18,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:47:18,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:18,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:47:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:47:18,460 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-01-06 09:47:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:18,551 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2021-01-06 09:47:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:47:18,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:47:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:18,565 INFO L225 Difference]: With dead ends: 42 [2021-01-06 09:47:18,566 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 09:47:18,569 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 [2021-01-06 09:47:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 09:47:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-01-06 09:47:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 09:47:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 09:47:18,610 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-01-06 09:47:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:18,611 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 09:47:18,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:47:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 09:47:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 09:47:18,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:18,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:18,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:47:18,613 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1567052653, now seen corresponding path program 1 times [2021-01-06 09:47:18,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:18,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056316963] [2021-01-06 09:47:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:47:18,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056316963] [2021-01-06 09:47:18,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163642424] [2021-01-06 09:47:18,684 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 [2021-01-06 09:47:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:47:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:47:18,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:18,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:47:18,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204631500] [2021-01-06 09:47:18,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:47:18,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:18,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:47:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:18,989 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2021-01-06 09:47:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:19,121 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-01-06 09:47:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:47:19,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 09:47:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:19,126 INFO L225 Difference]: With dead ends: 41 [2021-01-06 09:47:19,127 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:47:19,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:47:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-01-06 09:47:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:47:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 09:47:19,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2021-01-06 09:47:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:19,141 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 09:47:19,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:47:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 09:47:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:47:19,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:19,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:19,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:47:19,353 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:19,355 INFO L82 PathProgramCache]: Analyzing trace with hash 159288628, now seen corresponding path program 2 times [2021-01-06 09:47:19,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:19,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978486696] [2021-01-06 09:47:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:47:19,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978486696] [2021-01-06 09:47:19,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225344736] [2021-01-06 09:47:19,443 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 [2021-01-06 09:47:19,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:19,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:19,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:47:19,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:47:19,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:19,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:47:19,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975524732] [2021-01-06 09:47:19,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:47:19,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:47:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:19,565 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2021-01-06 09:47:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:19,636 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-01-06 09:47:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:47:19,637 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 09:47:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:19,638 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:47:19,638 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 09:47:19,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 09:47:19,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-01-06 09:47:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:47:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-01-06 09:47:19,646 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2021-01-06 09:47:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:19,647 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-01-06 09:47:19,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:47:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-01-06 09:47:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:47:19,648 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:19,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:19,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:19,863 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2098372907, now seen corresponding path program 3 times [2021-01-06 09:47:19,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:19,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99576131] [2021-01-06 09:47:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:47:20,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99576131] [2021-01-06 09:47:20,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302073631] [2021-01-06 09:47:20,028 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 [2021-01-06 09:47:20,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:47:20,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:20,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:47:20,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:47:20,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:20,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:47:20,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744259237] [2021-01-06 09:47:20,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:47:20,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:47:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:20,242 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2021-01-06 09:47:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:20,337 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-01-06 09:47:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:47:20,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-01-06 09:47:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:20,339 INFO L225 Difference]: With dead ends: 59 [2021-01-06 09:47:20,339 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:47:20,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:47:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-01-06 09:47:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:47:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-01-06 09:47:20,348 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-01-06 09:47:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:20,348 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-01-06 09:47:20,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:47:20,348 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-01-06 09:47:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:47:20,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:20,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:20,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:20,564 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:20,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1609282676, now seen corresponding path program 4 times [2021-01-06 09:47:20,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:20,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250056467] [2021-01-06 09:47:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 09:47:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250056467] [2021-01-06 09:47:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120563957] [2021-01-06 09:47:20,653 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 [2021-01-06 09:47:20,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:20,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:20,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:47:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 09:47:20,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:20,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:47:20,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015811033] [2021-01-06 09:47:20,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:47:20,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:47:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:20,798 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2021-01-06 09:47:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:20,884 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-01-06 09:47:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:47:20,885 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-01-06 09:47:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:20,886 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:47:20,887 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:47:20,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:47:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-01-06 09:47:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 09:47:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-01-06 09:47:20,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2021-01-06 09:47:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:20,895 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-01-06 09:47:20,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:47:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-01-06 09:47:20,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 09:47:20,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:20,897 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:21,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:21,112 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1784739267, now seen corresponding path program 5 times [2021-01-06 09:47:21,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:21,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540508178] [2021-01-06 09:47:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 09:47:21,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540508178] [2021-01-06 09:47:21,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400295512] [2021-01-06 09:47:21,215 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 [2021-01-06 09:47:21,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:47:21,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:21,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:47:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 09:47:21,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:21,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:47:21,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605324665] [2021-01-06 09:47:21,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:47:21,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:47:21,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:21,642 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2021-01-06 09:47:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:21,732 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-01-06 09:47:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:47:21,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-01-06 09:47:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:21,733 INFO L225 Difference]: With dead ends: 77 [2021-01-06 09:47:21,734 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:47:21,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:47:21,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-01-06 09:47:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:47:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-01-06 09:47:21,755 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-01-06 09:47:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:21,756 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-01-06 09:47:21,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:47:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-01-06 09:47:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:47:21,760 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:21,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:21,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:47:21,976 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2008431076, now seen corresponding path program 6 times [2021-01-06 09:47:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:21,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177710563] [2021-01-06 09:47:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:47:22,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177710563] [2021-01-06 09:47:22,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551261573] [2021-01-06 09:47:22,169 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 [2021-01-06 09:47:22,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:47:22,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:47:22,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 09:47:22,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:22,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:47:22,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540975581] [2021-01-06 09:47:22,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:47:22,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:47:22,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:47:22,746 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 10 states. [2021-01-06 09:47:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:22,849 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-01-06 09:47:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:47:22,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2021-01-06 09:47:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:22,850 INFO L225 Difference]: With dead ends: 86 [2021-01-06 09:47:22,850 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 09:47:22,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:47:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 09:47:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-01-06 09:47:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 09:47:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-01-06 09:47:22,858 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2021-01-06 09:47:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:22,858 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-01-06 09:47:22,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:47:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-01-06 09:47:22,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 09:47:22,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:22,860 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:23,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:23,073 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:23,075 INFO L82 PathProgramCache]: Analyzing trace with hash -700601765, now seen corresponding path program 7 times [2021-01-06 09:47:23,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:23,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053117798] [2021-01-06 09:47:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 09:47:23,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053117798] [2021-01-06 09:47:23,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388764063] [2021-01-06 09:47:23,239 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 [2021-01-06 09:47:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:47:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 09:47:23,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:23,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:47:23,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333070902] [2021-01-06 09:47:23,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:47:23,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:23,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:47:23,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:23,426 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 11 states. [2021-01-06 09:47:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:23,537 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2021-01-06 09:47:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:47:23,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2021-01-06 09:47:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:23,539 INFO L225 Difference]: With dead ends: 95 [2021-01-06 09:47:23,539 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:47:23,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:47:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-01-06 09:47:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:47:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-01-06 09:47:23,547 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2021-01-06 09:47:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:23,547 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-01-06 09:47:23,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:47:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-01-06 09:47:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:47:23,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:23,549 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:23,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:23,764 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1469732924, now seen corresponding path program 8 times [2021-01-06 09:47:23,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:23,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700722981] [2021-01-06 09:47:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 09:47:23,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700722981] [2021-01-06 09:47:23,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779968376] [2021-01-06 09:47:23,913 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 [2021-01-06 09:47:23,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:23,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:23,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:47:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 09:47:24,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:24,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:47:24,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420704800] [2021-01-06 09:47:24,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:47:24,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:24,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:47:24,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:24,099 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 12 states. [2021-01-06 09:47:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:24,219 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2021-01-06 09:47:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:47:24,220 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2021-01-06 09:47:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:24,222 INFO L225 Difference]: With dead ends: 104 [2021-01-06 09:47:24,223 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 09:47:24,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 09:47:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-01-06 09:47:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:47:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-01-06 09:47:24,236 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2021-01-06 09:47:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:24,237 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-01-06 09:47:24,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:47:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-01-06 09:47:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 09:47:24,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:24,239 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:24,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:47:24,453 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:24,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash 300072691, now seen corresponding path program 9 times [2021-01-06 09:47:24,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:24,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410273319] [2021-01-06 09:47:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 09:47:24,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410273319] [2021-01-06 09:47:24,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390943280] [2021-01-06 09:47:24,655 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 [2021-01-06 09:47:25,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:47:25,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:47:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 09:47:25,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:25,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:47:25,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239049933] [2021-01-06 09:47:25,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:47:25,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:47:25,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:25,211 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 13 states. [2021-01-06 09:47:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:25,340 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-01-06 09:47:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:47:25,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2021-01-06 09:47:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:25,341 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:47:25,341 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 09:47:25,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 09:47:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-01-06 09:47:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:47:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-01-06 09:47:25,349 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2021-01-06 09:47:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:25,349 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-01-06 09:47:25,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:47:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-01-06 09:47:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:47:25,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:25,351 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:25,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:25,565 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1049188716, now seen corresponding path program 10 times [2021-01-06 09:47:25,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:25,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678451107] [2021-01-06 09:47:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 09:47:25,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678451107] [2021-01-06 09:47:25,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365974467] [2021-01-06 09:47:25,757 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 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 [2021-01-06 09:47:25,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:25,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:47:25,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 09:47:25,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:25,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:47:25,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130494271] [2021-01-06 09:47:25,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:47:25,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:25,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:47:25,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:25,923 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2021-01-06 09:47:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:26,061 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-01-06 09:47:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:47:26,062 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2021-01-06 09:47:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:26,062 INFO L225 Difference]: With dead ends: 122 [2021-01-06 09:47:26,063 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 09:47:26,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 09:47:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-01-06 09:47:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 09:47:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-01-06 09:47:26,070 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2021-01-06 09:47:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:26,070 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-01-06 09:47:26,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:47:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-01-06 09:47:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 09:47:26,071 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:26,072 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:26,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:26,286 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:26,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1946825611, now seen corresponding path program 11 times [2021-01-06 09:47:26,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:26,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331975588] [2021-01-06 09:47:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 09:47:26,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331975588] [2021-01-06 09:47:26,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107258405] [2021-01-06 09:47:26,443 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 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 [2021-01-06 09:48:12,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:48:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:48:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 09:48:12,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:12,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:48:12,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713241546] [2021-01-06 09:48:12,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:48:12,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:12,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:48:12,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:48:12,398 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 15 states. [2021-01-06 09:48:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:12,548 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-01-06 09:48:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:48:12,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2021-01-06 09:48:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:12,550 INFO L225 Difference]: With dead ends: 131 [2021-01-06 09:48:12,550 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:48:12,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:48:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:48:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-01-06 09:48:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:48:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-01-06 09:48:12,557 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 66 [2021-01-06 09:48:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:12,558 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-01-06 09:48:12,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:48:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-01-06 09:48:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:48:12,559 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:12,559 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:12,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:48:12,774 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash -780065556, now seen corresponding path program 12 times [2021-01-06 09:48:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:12,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214040010] [2021-01-06 09:48:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:48:12,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214040010] [2021-01-06 09:48:12,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556401300] [2021-01-06 09:48:12,988 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 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 [2021-01-06 09:48:22,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:48:22,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:22,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:48:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 09:48:22,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:22,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:48:22,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774074653] [2021-01-06 09:48:22,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:48:22,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:22,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:48:22,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:48:22,711 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 16 states. [2021-01-06 09:48:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:22,877 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-01-06 09:48:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:48:22,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2021-01-06 09:48:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:22,879 INFO L225 Difference]: With dead ends: 140 [2021-01-06 09:48:22,879 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 09:48:22,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:48:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 09:48:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-01-06 09:48:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 09:48:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-01-06 09:48:22,886 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2021-01-06 09:48:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:22,886 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-01-06 09:48:22,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:48:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-01-06 09:48:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 09:48:22,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:22,888 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:23,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:48:23,088 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:23,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2028865571, now seen corresponding path program 13 times [2021-01-06 09:48:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:23,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141112906] [2021-01-06 09:48:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 09:48:23,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141112906] [2021-01-06 09:48:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699972446] [2021-01-06 09:48:23,334 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 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 [2021-01-06 09:48:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:23,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:48:23,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 09:48:23,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:23,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:48:23,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650467341] [2021-01-06 09:48:23,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:48:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:48:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:48:23,516 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 17 states. [2021-01-06 09:48:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:23,672 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2021-01-06 09:48:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:48:23,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2021-01-06 09:48:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:23,673 INFO L225 Difference]: With dead ends: 149 [2021-01-06 09:48:23,673 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:48:23,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:48:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:48:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-01-06 09:48:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:48:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-01-06 09:48:23,680 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2021-01-06 09:48:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:23,681 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-01-06 09:48:23,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:48:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-01-06 09:48:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:48:23,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:23,682 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:23,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:48:23,896 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:23,897 INFO L82 PathProgramCache]: Analyzing trace with hash 510645060, now seen corresponding path program 14 times [2021-01-06 09:48:23,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:23,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862275675] [2021-01-06 09:48:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:48:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862275675] [2021-01-06 09:48:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456312092] [2021-01-06 09:48:24,148 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 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 [2021-01-06 09:48:24,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:48:24,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:48:24,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:48:24,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:24,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:48:24,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620081170] [2021-01-06 09:48:24,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:48:24,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:48:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:48:24,346 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 18 states. [2021-01-06 09:48:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:24,525 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2021-01-06 09:48:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:48:24,526 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2021-01-06 09:48:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:24,527 INFO L225 Difference]: With dead ends: 158 [2021-01-06 09:48:24,527 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 09:48:24,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:48:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 09:48:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-01-06 09:48:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 09:48:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-01-06 09:48:24,534 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 81 [2021-01-06 09:48:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:24,534 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-01-06 09:48:24,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:48:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-01-06 09:48:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 09:48:24,536 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:24,536 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:24,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:24,751 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash -498582341, now seen corresponding path program 15 times [2021-01-06 09:48:24,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:24,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017229282] [2021-01-06 09:48:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-01-06 09:48:24,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017229282] [2021-01-06 09:48:24,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362498801] [2021-01-06 09:48:24,986 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 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 [2021-01-06 09:48:29,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:48:29,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:29,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:48:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-01-06 09:48:29,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:29,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:48:29,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65006169] [2021-01-06 09:48:29,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:48:29,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:48:29,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:48:29,303 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 19 states. [2021-01-06 09:48:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:29,477 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-01-06 09:48:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:48:29,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2021-01-06 09:48:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:29,479 INFO L225 Difference]: With dead ends: 167 [2021-01-06 09:48:29,479 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 09:48:29,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:48:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 09:48:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-01-06 09:48:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 09:48:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-01-06 09:48:29,485 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2021-01-06 09:48:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:29,485 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-01-06 09:48:29,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:48:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-01-06 09:48:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 09:48:29,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:29,487 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:29,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:48:29,688 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1720143460, now seen corresponding path program 16 times [2021-01-06 09:48:29,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:29,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612211691] [2021-01-06 09:48:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-01-06 09:48:29,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612211691] [2021-01-06 09:48:29,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832864677] [2021-01-06 09:48:29,946 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 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 [2021-01-06 09:48:30,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:48:30,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:48:30,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:48:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:48:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140282563] [2021-01-06 09:48:30,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:48:30,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:48:30,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:48:30,181 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 20 states. [2021-01-06 09:48:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:30,356 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2021-01-06 09:48:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:48:30,357 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2021-01-06 09:48:30,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:30,358 INFO L225 Difference]: With dead ends: 176 [2021-01-06 09:48:30,358 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 09:48:30,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:48:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 09:48:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-01-06 09:48:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 09:48:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-01-06 09:48:30,365 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2021-01-06 09:48:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:30,365 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-01-06 09:48:30,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:48:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-01-06 09:48:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:48:30,366 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:30,366 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:30,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:48:30,582 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash -682438317, now seen corresponding path program 17 times [2021-01-06 09:48:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:30,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933087862] [2021-01-06 09:48:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-01-06 09:48:30,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933087862] [2021-01-06 09:48:30,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628483132] [2021-01-06 09:48:30,868 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 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