/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/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:37:54,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:37:54,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:37:54,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:37:54,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:37:54,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:37:54,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:37:54,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:37:54,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:37:54,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:37:54,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:37:54,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:37:54,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:37:54,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:37:54,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:37:54,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:37:54,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:37:54,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:37:54,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:37:54,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:37:54,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:37:54,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:37:54,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:37:54,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:37:54,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:37:54,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:37:54,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:37:54,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:37:54,605 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 09:37:54,631 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:37:54,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:37:54,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:37:54,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:37:54,634 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:37:54,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:37:54,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:37:54,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:37:54,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:37:54,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:37:54,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:37:54,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:37:54,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:37:54,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:37:54,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:37:54,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:37:54,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:37:54,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:37:54,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:37:54,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:37:54,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:37:54,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:37:54,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:37:54,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:37:54,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:37:54,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:37:55,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:37:55,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:37:55,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:37:55,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:37:55,168 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:37:55,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2021-01-06 09:37:55,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2ec9e6a20/17b19175406748d7b7101b9fb903dc73/FLAGd65195e26 [2021-01-06 09:37:55,838 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:37:55,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2021-01-06 09:37:55,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2ec9e6a20/17b19175406748d7b7101b9fb903dc73/FLAGd65195e26 [2021-01-06 09:37:56,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2ec9e6a20/17b19175406748d7b7101b9fb903dc73 [2021-01-06 09:37:56,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:37:56,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:37:56,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:37:56,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:37:56,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:37:56,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2c38b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56, skipping insertion in model container [2021-01-06 09:37:56,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:37:56,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:37:56,434 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/data_structures_set_multi_proc_ground-1.i[832,845] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~set,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~set,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~size,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~set~0,],[IdentifierExpression[~x~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~values~0,],[IdentifierExpression[~v~0,]]] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 09:37:56,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:37:56,469 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:37:56,484 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/data_structures_set_multi_proc_ground-1.i[832,845] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~set,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~set,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~size,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#set~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#set~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~x~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#values~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#values~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~v~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 09:37:56,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:37:56,515 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:37:56,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56 WrapperNode [2021-01-06 09:37:56,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:37:56,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:37:56,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:37:56,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:37:56,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:37:56,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:37:56,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:37:56,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:37:56,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:37:56,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:37:56,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:37:56,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:37:56,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (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 09:37:56,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:37:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:37:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:37:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:37:56,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:37:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:37:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:37:57,345 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:37:57,346 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-01-06 09:37:57,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:37:57 BoogieIcfgContainer [2021-01-06 09:37:57,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:37:57,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:37:57,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:37:57,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:37:57,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:37:56" (1/3) ... [2021-01-06 09:37:57,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a99725b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:37:57, skipping insertion in model container [2021-01-06 09:37:57,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (2/3) ... [2021-01-06 09:37:57,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a99725b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:37:57, skipping insertion in model container [2021-01-06 09:37:57,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:37:57" (3/3) ... [2021-01-06 09:37:57,358 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2021-01-06 09:37:57,365 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:37:57,371 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 09:37:57,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 09:37:57,419 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:37:57,420 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:37:57,420 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:37:57,420 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:37:57,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:37:57,421 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:37:57,421 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:37:57,421 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:37:57,437 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-01-06 09:37:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 09:37:57,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:57,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:57,445 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash 212109301, now seen corresponding path program 1 times [2021-01-06 09:37:57,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:57,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367780743] [2021-01-06 09:37:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:57,664 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 09:37:57,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367780743] [2021-01-06 09:37:57,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:37:57,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:37:57,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081031267] [2021-01-06 09:37:57,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:57,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:37:57,696 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2021-01-06 09:37:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:57,815 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2021-01-06 09:37:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:57,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-06 09:37:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:57,829 INFO L225 Difference]: With dead ends: 110 [2021-01-06 09:37:57,829 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:37:57,833 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 09:37:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:37:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2021-01-06 09:37:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:37:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-01-06 09:37:57,877 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 8 [2021-01-06 09:37:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:57,877 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-01-06 09:37:57,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-01-06 09:37:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:37:57,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:57,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:57,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:37:57,879 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:57,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1436007159, now seen corresponding path program 1 times [2021-01-06 09:37:57,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:57,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547569112] [2021-01-06 09:37:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:37:57,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547569112] [2021-01-06 09:37:57,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192088801] [2021-01-06 09:37:57,939 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 09:37:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:37:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:37:58,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:58,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:37:58,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588313147] [2021-01-06 09:37:58,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:37:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:37:58,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,122 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2021-01-06 09:37:58,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,248 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2021-01-06 09:37:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:37:58,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 09:37:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,252 INFO L225 Difference]: With dead ends: 130 [2021-01-06 09:37:58,252 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 09:37:58,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 09:37:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 09:37:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 38. [2021-01-06 09:37:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:37:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-01-06 09:37:58,264 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2021-01-06 09:37:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,264 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-01-06 09:37:58,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:37:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-01-06 09:37:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 09:37:58,265 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:37:58,481 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,482 INFO L82 PathProgramCache]: Analyzing trace with hash 780809593, now seen corresponding path program 2 times [2021-01-06 09:37:58,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16374198] [2021-01-06 09:37:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:37:58,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16374198] [2021-01-06 09:37:58,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:37:58,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 09:37:58,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936494340] [2021-01-06 09:37:58,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 09:37:58,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 09:37:58,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 09:37:58,620 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 4 states. [2021-01-06 09:37:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,701 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2021-01-06 09:37:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:37:58,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 09:37:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,704 INFO L225 Difference]: With dead ends: 72 [2021-01-06 09:37:58,704 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 09:37:58,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 09:37:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 09:37:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 09:37:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 09:37:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-01-06 09:37:58,717 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2021-01-06 09:37:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,717 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-01-06 09:37:58,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 09:37:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-01-06 09:37:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 09:37:58,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,719 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 09:37:58,719 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,720 INFO L82 PathProgramCache]: Analyzing trace with hash 27211895, now seen corresponding path program 1 times [2021-01-06 09:37:58,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387456016] [2021-01-06 09:37:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:37:58,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387456016] [2021-01-06 09:37:58,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:37:58,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:37:58,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142907372] [2021-01-06 09:37:58,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:58,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:37:58,774 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2021-01-06 09:37:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,818 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2021-01-06 09:37:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:58,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-01-06 09:37:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,820 INFO L225 Difference]: With dead ends: 78 [2021-01-06 09:37:58,820 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 09:37:58,821 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 09:37:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 09:37:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2021-01-06 09:37:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 09:37:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-01-06 09:37:58,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 25 [2021-01-06 09:37:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,829 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-01-06 09:37:58,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-01-06 09:37:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 09:37:58,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 09:37:58,831 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,832 INFO L82 PathProgramCache]: Analyzing trace with hash 676355061, now seen corresponding path program 1 times [2021-01-06 09:37:58,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780100668] [2021-01-06 09:37:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:37:58,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780100668] [2021-01-06 09:37:58,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470613437] [2021-01-06 09:37:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:37:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:37:59,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:59,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 09:37:59,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692486859] [2021-01-06 09:37:59,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:37:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:37:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:37:59,156 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2021-01-06 09:37:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,350 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2021-01-06 09:37:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:37:59,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2021-01-06 09:37:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,353 INFO L225 Difference]: With dead ends: 130 [2021-01-06 09:37:59,354 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 09:37:59,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:37:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 09:37:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2021-01-06 09:37:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:37:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-01-06 09:37:59,369 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 27 [2021-01-06 09:37:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,370 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-01-06 09:37:59,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:37:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-01-06 09:37:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:37:59,372 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:59,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,588 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash -719529317, now seen corresponding path program 1 times [2021-01-06 09:37:59,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:59,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188772182] [2021-01-06 09:37:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:37:59,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188772182] [2021-01-06 09:37:59,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:37:59,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 09:37:59,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186248451] [2021-01-06 09:37:59,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 09:37:59,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 09:37:59,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 09:37:59,687 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 4 states. [2021-01-06 09:37:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,721 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2021-01-06 09:37:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:37:59,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2021-01-06 09:37:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,723 INFO L225 Difference]: With dead ends: 72 [2021-01-06 09:37:59,723 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:37:59,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:37:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 09:37:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 09:37:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-01-06 09:37:59,731 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2021-01-06 09:37:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,732 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-01-06 09:37:59,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 09:37:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-01-06 09:37:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 09:37:59,733 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:59,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 09:37:59,734 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1020039433, now seen corresponding path program 2 times [2021-01-06 09:37:59,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:59,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880468066] [2021-01-06 09:37:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:37:59,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880468066] [2021-01-06 09:37:59,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884390467] [2021-01-06 09:37:59,835 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 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 09:37:59,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:37:59,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:37:59,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:37:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:38:00,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:00,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:38:00,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724772375] [2021-01-06 09:38:00,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:38:00,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:00,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:38:00,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:38:00,094 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2021-01-06 09:38:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:00,191 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2021-01-06 09:38:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:38:00,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2021-01-06 09:38:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:00,193 INFO L225 Difference]: With dead ends: 118 [2021-01-06 09:38:00,193 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 09:38:00,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 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 09:38:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 09:38:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2021-01-06 09:38:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 09:38:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-01-06 09:38:00,202 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 38 [2021-01-06 09:38:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:00,203 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-01-06 09:38:00,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:38:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-01-06 09:38:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 09:38:00,204 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:00,204 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:00,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:00,420 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash 607523979, now seen corresponding path program 3 times [2021-01-06 09:38:00,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:00,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276042474] [2021-01-06 09:38:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:38:00,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276042474] [2021-01-06 09:38:00,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834714033] [2021-01-06 09:38:00,505 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 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 09:38:00,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:38:00,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:38:00,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 09:38:00,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:00,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 09:38:00,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578863281] [2021-01-06 09:38:00,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:38:00,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:00,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:38:00,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:38:00,687 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 10 states. [2021-01-06 09:38:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:00,841 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2021-01-06 09:38:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:38:00,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2021-01-06 09:38:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:00,843 INFO L225 Difference]: With dead ends: 148 [2021-01-06 09:38:00,843 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 09:38:00,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 09:38:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 61. [2021-01-06 09:38:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 09:38:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 09:38:00,853 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 40 [2021-01-06 09:38:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:00,854 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 09:38:00,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:38:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 09:38:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:38:00,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:00,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:01,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:01,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1656109653, now seen corresponding path program 4 times [2021-01-06 09:38:01,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:01,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139485438] [2021-01-06 09:38:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-01-06 09:38:01,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139485438] [2021-01-06 09:38:01,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301627739] [2021-01-06 09:38:01,168 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 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 09:38:01,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:01,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:38:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-01-06 09:38:01,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:01,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:38:01,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572817523] [2021-01-06 09:38:01,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:38:01,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:38:01,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:38:01,344 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 9 states. [2021-01-06 09:38:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:01,423 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2021-01-06 09:38:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:38:01,424 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2021-01-06 09:38:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:01,425 INFO L225 Difference]: With dead ends: 160 [2021-01-06 09:38:01,425 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 09:38:01,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 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 09:38:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 09:38:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 63. [2021-01-06 09:38:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 09:38:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-01-06 09:38:01,435 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 51 [2021-01-06 09:38:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:01,435 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-01-06 09:38:01,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:38:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-01-06 09:38:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:38:01,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:01,437 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:01,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,651 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash -112360087, now seen corresponding path program 5 times [2021-01-06 09:38:01,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:01,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066087143] [2021-01-06 09:38:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-01-06 09:38:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066087143] [2021-01-06 09:38:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511877665] [2021-01-06 09:38:01,779 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 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 09:38:02,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 09:38:02,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:02,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:38:02,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:02,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-01-06 09:38:02,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450806703] [2021-01-06 09:38:02,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:38:02,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:02,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:38:02,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:02,197 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 13 states. [2021-01-06 09:38:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:02,777 INFO L93 Difference]: Finished difference Result 251 states and 291 transitions. [2021-01-06 09:38:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 09:38:02,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2021-01-06 09:38:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:02,780 INFO L225 Difference]: With dead ends: 251 [2021-01-06 09:38:02,780 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 09:38:02,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 09:38:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 09:38:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 67. [2021-01-06 09:38:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 09:38:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-01-06 09:38:02,799 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 53 [2021-01-06 09:38:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:02,799 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-01-06 09:38:02,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:38:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-01-06 09:38:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 09:38:02,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:02,801 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:03,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:03,006 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1113830631, now seen corresponding path program 1 times [2021-01-06 09:38:03,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:03,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653974171] [2021-01-06 09:38:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 09:38:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653974171] [2021-01-06 09:38:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420097114] [2021-01-06 09:38:03,180 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 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 09:38:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:03,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 09:38:03,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:03,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:38:03,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815123858] [2021-01-06 09:38:03,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:38:03,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:38:03,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:38:03,370 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 11 states. [2021-01-06 09:38:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:03,473 INFO L93 Difference]: Finished difference Result 184 states and 212 transitions. [2021-01-06 09:38:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:38:03,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2021-01-06 09:38:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:03,475 INFO L225 Difference]: With dead ends: 184 [2021-01-06 09:38:03,475 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 09:38:03,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 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 09:38:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 09:38:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 69. [2021-01-06 09:38:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 09:38:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-01-06 09:38:03,485 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 55 [2021-01-06 09:38:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:03,486 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-01-06 09:38:03,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:38:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-01-06 09:38:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:38:03,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:03,487 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:03,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:03,701 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1927636389, now seen corresponding path program 2 times [2021-01-06 09:38:03,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:03,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083795179] [2021-01-06 09:38:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 09:38:03,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083795179] [2021-01-06 09:38:03,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350949403] [2021-01-06 09:38:03,926 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 09:38:04,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:04,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:38:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 09:38:04,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:04,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:38:04,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130401530] [2021-01-06 09:38:04,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:38:04,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:38:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:04,164 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 12 states. [2021-01-06 09:38:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:04,287 INFO L93 Difference]: Finished difference Result 194 states and 223 transitions. [2021-01-06 09:38:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:38:04,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2021-01-06 09:38:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:04,289 INFO L225 Difference]: With dead ends: 194 [2021-01-06 09:38:04,289 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 09:38:04,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 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 09:38:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 09:38:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 71. [2021-01-06 09:38:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 09:38:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-01-06 09:38:04,298 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 57 [2021-01-06 09:38:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:04,298 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-01-06 09:38:04,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:38:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-01-06 09:38:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:38:04,299 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:04,300 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:04,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:38:04,513 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1984045341, now seen corresponding path program 3 times [2021-01-06 09:38:04,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:04,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014041223] [2021-01-06 09:38:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 09:38:04,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014041223] [2021-01-06 09:38:04,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381386403] [2021-01-06 09:38:04,675 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 09:38:04,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 09:38:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:04,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-01-06 09:38:04,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:04,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2021-01-06 09:38:04,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547326335] [2021-01-06 09:38:04,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:38:04,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:04,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:38:04,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:38:04,917 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 16 states. [2021-01-06 09:38:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,171 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2021-01-06 09:38:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:38:05,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2021-01-06 09:38:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,174 INFO L225 Difference]: With dead ends: 226 [2021-01-06 09:38:05,174 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 09:38:05,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:38:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 09:38:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 85. [2021-01-06 09:38:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 09:38:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2021-01-06 09:38:05,194 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2021-01-06 09:38:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,194 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2021-01-06 09:38:05,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:38:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2021-01-06 09:38:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 09:38:05,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,203 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:05,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:05,418 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:05,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1415133969, now seen corresponding path program 4 times [2021-01-06 09:38:05,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:05,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329010445] [2021-01-06 09:38:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 09:38:05,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329010445] [2021-01-06 09:38:05,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729056527] [2021-01-06 09:38:05,570 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 09:38:05,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:38:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 09:38:05,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:05,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:38:05,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484459807] [2021-01-06 09:38:05,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:38:05,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:38:05,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:05,790 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 14 states. [2021-01-06 09:38:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,932 INFO L93 Difference]: Finished difference Result 238 states and 273 transitions. [2021-01-06 09:38:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:38:05,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2021-01-06 09:38:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,934 INFO L225 Difference]: With dead ends: 238 [2021-01-06 09:38:05,934 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 09:38:05,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 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 09:38:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 09:38:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 87. [2021-01-06 09:38:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 09:38:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-01-06 09:38:05,944 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 70 [2021-01-06 09:38:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,945 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-01-06 09:38:05,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:38:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-01-06 09:38:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 09:38:05,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,946 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:06,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:06,160 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1534839149, now seen corresponding path program 5 times [2021-01-06 09:38:06,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:06,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319364168] [2021-01-06 09:38:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 09:38:06,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319364168] [2021-01-06 09:38:06,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242169418] [2021-01-06 09:38:06,333 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 09:38:07,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:38:07,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:07,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:38:07,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-01-06 09:38:07,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:07,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-01-06 09:38:07,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594700558] [2021-01-06 09:38:07,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:38:07,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:38:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:38:07,376 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 19 states. [2021-01-06 09:38:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:07,668 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2021-01-06 09:38:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:38:07,669 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 72 [2021-01-06 09:38:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:07,670 INFO L225 Difference]: With dead ends: 270 [2021-01-06 09:38:07,670 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 09:38:07,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:38:07,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 09:38:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 101. [2021-01-06 09:38:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 09:38:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-01-06 09:38:07,682 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 72 [2021-01-06 09:38:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:07,682 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-01-06 09:38:07,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:38:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-01-06 09:38:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 09:38:07,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:07,683 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:07,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 09:38:07,897 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:07,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:07,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1835696295, now seen corresponding path program 6 times [2021-01-06 09:38:07,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:07,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509751298] [2021-01-06 09:38:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-01-06 09:38:08,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509751298] [2021-01-06 09:38:08,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235160807] [2021-01-06 09:38:08,109 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 09:38:08,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 09:38:08,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:38:08,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 09:38:09,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:09,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2021-01-06 09:38:09,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596365173] [2021-01-06 09:38:09,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:38:09,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:38:09,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:09,086 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 21 states. [2021-01-06 09:38:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:09,474 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2021-01-06 09:38:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:38:09,475 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2021-01-06 09:38:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:09,478 INFO L225 Difference]: With dead ends: 304 [2021-01-06 09:38:09,478 INFO L226 Difference]: Without dead ends: 230 [2021-01-06 09:38:09,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=444, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:38:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-01-06 09:38:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 115. [2021-01-06 09:38:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 09:38:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2021-01-06 09:38:09,494 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 83 [2021-01-06 09:38:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:09,495 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2021-01-06 09:38:09,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:38:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2021-01-06 09:38:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 09:38:09,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:09,496 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:09,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:38:09,710 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2084179419, now seen corresponding path program 7 times [2021-01-06 09:38:09,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:09,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402704697] [2021-01-06 09:38:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-01-06 09:38:09,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402704697] [2021-01-06 09:38:09,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695343998] [2021-01-06 09:38:09,972 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 09:38:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:38:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-01-06 09:38:10,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:10,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:38:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80378918] [2021-01-06 09:38:10,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:38:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:38:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:38:10,237 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand 17 states. [2021-01-06 09:38:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:10,439 INFO L93 Difference]: Finished difference Result 316 states and 362 transitions. [2021-01-06 09:38:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:38:10,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2021-01-06 09:38:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:10,441 INFO L225 Difference]: With dead ends: 316 [2021-01-06 09:38:10,441 INFO L226 Difference]: Without dead ends: 230 [2021-01-06 09:38:10,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 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 09:38:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-01-06 09:38:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 117. [2021-01-06 09:38:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 09:38:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2021-01-06 09:38:10,455 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 94 [2021-01-06 09:38:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:10,456 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2021-01-06 09:38:10,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:38:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2021-01-06 09:38:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:38:10,457 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:10,457 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:10,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:38:10,671 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash -362077347, now seen corresponding path program 8 times [2021-01-06 09:38:10,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:10,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206490268] [2021-01-06 09:38:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-01-06 09:38:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206490268] [2021-01-06 09:38:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724953648] [2021-01-06 09:38:10,903 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 09:38:11,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:11,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:38:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-01-06 09:38:11,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:11,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:38:11,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740530715] [2021-01-06 09:38:11,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:38:11,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:11,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:38:11,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:11,168 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand 18 states. [2021-01-06 09:38:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:11,364 INFO L93 Difference]: Finished difference Result 326 states and 373 transitions. [2021-01-06 09:38:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:38:11,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2021-01-06 09:38:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:11,366 INFO L225 Difference]: With dead ends: 326 [2021-01-06 09:38:11,366 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 09:38:11,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 96 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 09:38:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 09:38:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 119. [2021-01-06 09:38:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 09:38:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2021-01-06 09:38:11,380 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 96 [2021-01-06 09:38:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:11,380 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2021-01-06 09:38:11,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:38:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2021-01-06 09:38:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 09:38:11,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:11,381 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:11,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:11,597 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:11,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1867718561, now seen corresponding path program 9 times [2021-01-06 09:38:11,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:11,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674254] [2021-01-06 09:38:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-01-06 09:38:11,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674254] [2021-01-06 09:38:11,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707500163] [2021-01-06 09:38:11,871 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 09:38:12,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 09:38:12,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:38:12,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-01-06 09:38:12,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:12,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2021-01-06 09:38:12,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006347861] [2021-01-06 09:38:12,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 09:38:12,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:12,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 09:38:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:38:12,457 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 25 states. [2021-01-06 09:38:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:12,870 INFO L93 Difference]: Finished difference Result 358 states and 412 transitions. [2021-01-06 09:38:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:38:12,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2021-01-06 09:38:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:12,872 INFO L225 Difference]: With dead ends: 358 [2021-01-06 09:38:12,872 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 09:38:12,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 09:38:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 133. [2021-01-06 09:38:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 09:38:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2021-01-06 09:38:12,887 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 98 [2021-01-06 09:38:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:12,887 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2021-01-06 09:38:12,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 09:38:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2021-01-06 09:38:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 09:38:12,889 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:12,889 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:13,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:13,105 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash -481778419, now seen corresponding path program 10 times [2021-01-06 09:38:13,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:13,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606602933] [2021-01-06 09:38:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-01-06 09:38:13,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606602933] [2021-01-06 09:38:13,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718204007] [2021-01-06 09:38:13,371 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 09:38:13,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:13,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:13,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:38:13,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-01-06 09:38:13,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:13,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:38:13,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447146127] [2021-01-06 09:38:13,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:38:13,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:38:13,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:38:13,712 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand 20 states. [2021-01-06 09:38:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:13,987 INFO L93 Difference]: Finished difference Result 370 states and 423 transitions. [2021-01-06 09:38:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:38:13,988 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2021-01-06 09:38:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:13,990 INFO L225 Difference]: With dead ends: 370 [2021-01-06 09:38:13,990 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 09:38:13,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 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 09:38:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 09:38:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 135. [2021-01-06 09:38:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 09:38:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2021-01-06 09:38:14,006 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 109 [2021-01-06 09:38:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:14,006 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2021-01-06 09:38:14,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:38:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2021-01-06 09:38:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 09:38:14,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:14,008 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:14,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:14,223 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1338139829, now seen corresponding path program 11 times [2021-01-06 09:38:14,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:14,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068238933] [2021-01-06 09:38:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-01-06 09:38:14,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068238933] [2021-01-06 09:38:14,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033335979] [2021-01-06 09:38:14,491 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 [2021-01-06 09:39:00,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 09:39:00,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:00,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:39:00,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-01-06 09:39:00,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:00,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:39:00,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144869674] [2021-01-06 09:39:00,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:39:00,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:00,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:39:00,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:39:00,355 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 21 states. [2021-01-06 09:39:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:00,642 INFO L93 Difference]: Finished difference Result 380 states and 434 transitions. [2021-01-06 09:39:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:39:00,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2021-01-06 09:39:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:00,644 INFO L225 Difference]: With dead ends: 380 [2021-01-06 09:39:00,644 INFO L226 Difference]: Without dead ends: 282 [2021-01-06 09:39:00,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:39:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-01-06 09:39:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 137. [2021-01-06 09:39:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 09:39:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2021-01-06 09:39:00,659 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 111 [2021-01-06 09:39:00,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:00,659 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2021-01-06 09:39:00,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:39:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2021-01-06 09:39:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-01-06 09:39:00,661 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:00,661 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:00,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:39:00,875 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:00,875 INFO L82 PathProgramCache]: Analyzing trace with hash 332265993, now seen corresponding path program 12 times [2021-01-06 09:39:00,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:00,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954602655] [2021-01-06 09:39:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-01-06 09:39:01,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954602655] [2021-01-06 09:39:01,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293942838] [2021-01-06 09:39:01,215 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:07,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 09:39:07,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:07,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:39:07,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-01-06 09:39:07,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:07,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2021-01-06 09:39:07,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511754001] [2021-01-06 09:39:07,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:39:07,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:07,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:39:07,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:39:07,286 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand 29 states. [2021-01-06 09:39:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:07,837 INFO L93 Difference]: Finished difference Result 412 states and 473 transitions. [2021-01-06 09:39:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:39:07,837 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2021-01-06 09:39:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:07,839 INFO L225 Difference]: With dead ends: 412 [2021-01-06 09:39:07,839 INFO L226 Difference]: Without dead ends: 314 [2021-01-06 09:39:07,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=846, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 09:39:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-01-06 09:39:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 151. [2021-01-06 09:39:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 09:39:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2021-01-06 09:39:07,857 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 113 [2021-01-06 09:39:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:07,857 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2021-01-06 09:39:07,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:39:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2021-01-06 09:39:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 09:39:07,858 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:07,859 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:08,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:39:08,073 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash -713195989, now seen corresponding path program 13 times [2021-01-06 09:39:08,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:08,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583530302] [2021-01-06 09:39:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-01-06 09:39:08,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583530302] [2021-01-06 09:39:08,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412498732] [2021-01-06 09:39:08,431 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:39:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-01-06 09:39:08,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:08,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:39:08,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959570333] [2021-01-06 09:39:08,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:39:08,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:39:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:39:08,795 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand 23 states. [2021-01-06 09:39:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:09,131 INFO L93 Difference]: Finished difference Result 424 states and 484 transitions. [2021-01-06 09:39:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:39:09,132 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2021-01-06 09:39:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:09,134 INFO L225 Difference]: With dead ends: 424 [2021-01-06 09:39:09,134 INFO L226 Difference]: Without dead ends: 314 [2021-01-06 09:39:09,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:39:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-01-06 09:39:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 153. [2021-01-06 09:39:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 09:39:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 173 transitions. [2021-01-06 09:39:09,151 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 173 transitions. Word has length 124 [2021-01-06 09:39:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:09,152 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 173 transitions. [2021-01-06 09:39:09,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:39:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 173 transitions. [2021-01-06 09:39:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 09:39:09,153 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:09,153 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:09,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 09:39:09,369 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash -829324243, now seen corresponding path program 14 times [2021-01-06 09:39:09,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:09,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626459689] [2021-01-06 09:39:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-01-06 09:39:09,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626459689] [2021-01-06 09:39:09,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010931837] [2021-01-06 09:39:09,761 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:09,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:39:09,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:09,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:39:09,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-01-06 09:39:10,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:10,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:39:10,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791511367] [2021-01-06 09:39:10,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:39:10,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:10,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:39:10,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:39:10,086 INFO L87 Difference]: Start difference. First operand 153 states and 173 transitions. Second operand 24 states. [2021-01-06 09:39:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:10,481 INFO L93 Difference]: Finished difference Result 434 states and 495 transitions. [2021-01-06 09:39:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:39:10,482 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2021-01-06 09:39:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:10,484 INFO L225 Difference]: With dead ends: 434 [2021-01-06 09:39:10,484 INFO L226 Difference]: Without dead ends: 324 [2021-01-06 09:39:10,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:39:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-01-06 09:39:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 155. [2021-01-06 09:39:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 09:39:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2021-01-06 09:39:10,515 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 126 [2021-01-06 09:39:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:10,515 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2021-01-06 09:39:10,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:39:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2021-01-06 09:39:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 09:39:10,517 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:10,517 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:10,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 09:39:10,731 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash -759426641, now seen corresponding path program 15 times [2021-01-06 09:39:10,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:10,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143793210] [2021-01-06 09:39:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-01-06 09:39:11,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143793210] [2021-01-06 09:39:11,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630325838] [2021-01-06 09:39:11,177 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:13,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:39:13,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:39:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2021-01-06 09:39:13,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:13,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2021-01-06 09:39:13,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334222435] [2021-01-06 09:39:13,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 09:39:13,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 09:39:13,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:39:13,542 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 33 states. [2021-01-06 09:39:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:14,146 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2021-01-06 09:39:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 09:39:14,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 128 [2021-01-06 09:39:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:14,149 INFO L225 Difference]: With dead ends: 466 [2021-01-06 09:39:14,149 INFO L226 Difference]: Without dead ends: 356 [2021-01-06 09:39:14,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=627, Invalid=1095, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 09:39:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-01-06 09:39:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 169. [2021-01-06 09:39:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 09:39:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2021-01-06 09:39:14,170 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 128 [2021-01-06 09:39:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:14,171 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2021-01-06 09:39:14,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 09:39:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2021-01-06 09:39:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-06 09:39:14,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:14,172 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:14,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 09:39:14,386 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:14,387 INFO L82 PathProgramCache]: Analyzing trace with hash -441718595, now seen corresponding path program 16 times [2021-01-06 09:39:14,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:14,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711736405] [2021-01-06 09:39:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-01-06 09:39:14,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711736405] [2021-01-06 09:39:14,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075246418] [2021-01-06 09:39:14,801 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:15,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:39:15,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:39:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-01-06 09:39:15,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:15,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 09:39:15,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343437984] [2021-01-06 09:39:15,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:39:15,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:15,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:39:15,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:39:15,281 INFO L87 Difference]: Start difference. First operand 169 states and 191 transitions. Second operand 26 states. [2021-01-06 09:39:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:15,743 INFO L93 Difference]: Finished difference Result 478 states and 545 transitions. [2021-01-06 09:39:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:39:15,743 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2021-01-06 09:39:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:15,745 INFO L225 Difference]: With dead ends: 478 [2021-01-06 09:39:15,745 INFO L226 Difference]: Without dead ends: 356 [2021-01-06 09:39:15,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:39:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-01-06 09:39:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 171. [2021-01-06 09:39:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 09:39:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2021-01-06 09:39:15,768 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 139 [2021-01-06 09:39:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:15,769 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2021-01-06 09:39:15,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:39:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2021-01-06 09:39:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 09:39:15,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:15,770 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:15,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:15,985 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1349443195, now seen corresponding path program 17 times [2021-01-06 09:39:15,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:15,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939244172] [2021-01-06 09:39:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-01-06 09:39:16,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939244172] [2021-01-06 09:39:16,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798064103] [2021-01-06 09:39:16,488 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true