/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:42:18,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:42:18,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:42:18,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:42:18,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:42:18,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:42:18,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:42:18,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:42:18,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:42:18,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:42:18,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:42:18,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:42:18,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:42:18,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:42:18,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:42:18,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:42:18,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:42:18,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:42:18,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:42:18,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:42:18,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:42:18,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:42:18,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:42:18,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:42:18,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:42:18,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:42:18,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:42:18,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:42:18,445 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 09:42:18,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:42:18,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:42:18,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:42:18,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:42:18,477 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:42:18,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:42:18,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:42:18,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:42:18,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:42:18,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:42:18,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:42:18,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:42:18,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:42:18,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:42:18,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:42:18,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:42:18,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:42:18,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:18,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:42:18,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:42:18,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:42:18,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:42:18,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:42:18,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:42:18,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:42:18,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:42:18,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:42:18,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:42:18,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:42:18,976 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:42:18,977 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:42:18,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i [2021-01-06 09:42:19,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5dd426d55/6da8955ab70d4b2f98353c562931cf04/FLAG681a59dff [2021-01-06 09:42:19,802 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:42:19,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i [2021-01-06 09:42:19,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5dd426d55/6da8955ab70d4b2f98353c562931cf04/FLAG681a59dff [2021-01-06 09:42:20,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5dd426d55/6da8955ab70d4b2f98353c562931cf04 [2021-01-06 09:42:20,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:42:20,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:42:20,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:20,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:42:20,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:42:20,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb17099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20, skipping insertion in model container [2021-01-06 09:42:20,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:42:20,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:42:20,349 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:20,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:20,379 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:42:20,393 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:20,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:20,420 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:42:20,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20 WrapperNode [2021-01-06 09:42:20,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:20,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:20,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:42:20,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:42:20,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:20,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:42:20,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:42:20,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:42:20,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:42:20,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:42:20,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:42:20,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:42:20,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (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 09:42:20,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:42:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:42:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:42:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:42:20,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:42:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:42:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:42:21,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:42:21,050 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 09:42:21,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:21 BoogieIcfgContainer [2021-01-06 09:42:21,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:42:21,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:42:21,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:42:21,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:42:21,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:42:20" (1/3) ... [2021-01-06 09:42:21,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5424e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:21, skipping insertion in model container [2021-01-06 09:42:21,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (2/3) ... [2021-01-06 09:42:21,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5424e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:21, skipping insertion in model container [2021-01-06 09:42:21,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:21" (3/3) ... [2021-01-06 09:42:21,063 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2021-01-06 09:42:21,075 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:42:21,088 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:42:21,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:42:21,175 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:42:21,175 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:42:21,176 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:42:21,176 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:42:21,176 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:42:21,176 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:42:21,176 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:42:21,176 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:42:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 09:42:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 09:42:21,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:21,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:21,199 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2053894623, now seen corresponding path program 1 times [2021-01-06 09:42:21,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:21,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866151619] [2021-01-06 09:42:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:21,411 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 09:42:21,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866151619] [2021-01-06 09:42:21,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:42:21,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:42:21,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39937998] [2021-01-06 09:42:21,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:21,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:21,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:21,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:21,435 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-01-06 09:42:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:21,473 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2021-01-06 09:42:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:21,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-01-06 09:42:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:21,486 INFO L225 Difference]: With dead ends: 46 [2021-01-06 09:42:21,486 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 09:42:21,489 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 09:42:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 09:42:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 09:42:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 09:42:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-01-06 09:42:21,526 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2021-01-06 09:42:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:21,527 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-01-06 09:42:21,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-01-06 09:42:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:42:21,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:21,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:21,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:42:21,529 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:21,530 INFO L82 PathProgramCache]: Analyzing trace with hash -418223009, now seen corresponding path program 1 times [2021-01-06 09:42:21,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:21,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055363243] [2021-01-06 09:42:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:21,603 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 09:42:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055363243] [2021-01-06 09:42:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807541554] [2021-01-06 09:42:21,605 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 09:42:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:42:21,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:21,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:42:21,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:42:21,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019164531] [2021-01-06 09:42:21,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:21,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:21,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:21,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:21,714 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2021-01-06 09:42:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:21,750 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-01-06 09:42:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:21,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 09:42:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:21,752 INFO L225 Difference]: With dead ends: 40 [2021-01-06 09:42:21,752 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:42:21,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:42:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-01-06 09:42:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:42:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 09:42:21,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2021-01-06 09:42:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:21,759 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 09:42:21,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 09:42:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:42:21,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:21,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:21,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:42:21,976 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:21,978 INFO L82 PathProgramCache]: Analyzing trace with hash 241580185, now seen corresponding path program 1 times [2021-01-06 09:42:21,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:21,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230505105] [2021-01-06 09:42:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 09:42:22,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230505105] [2021-01-06 09:42:22,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855177289] [2021-01-06 09:42:22,069 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 09:42:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:22,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 09:42:22,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:22,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:22,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939604111] [2021-01-06 09:42:22,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:22,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:22,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:22,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:22,216 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2021-01-06 09:42:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:22,239 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-01-06 09:42:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:22,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2021-01-06 09:42:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:22,241 INFO L225 Difference]: With dead ends: 46 [2021-01-06 09:42:22,241 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:42:22,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 09:42:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:42:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 09:42:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:42:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-01-06 09:42:22,247 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2021-01-06 09:42:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:22,248 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-01-06 09:42:22,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-01-06 09:42:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:42:22,249 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:22,249 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] [2021-01-06 09:42:22,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:22,463 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:22,464 INFO L82 PathProgramCache]: Analyzing trace with hash 456751319, now seen corresponding path program 2 times [2021-01-06 09:42:22,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:22,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411161121] [2021-01-06 09:42:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:42:22,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411161121] [2021-01-06 09:42:22,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087105158] [2021-01-06 09:42:22,592 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 09:42:22,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:22,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:22,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:22,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:42:22,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:22,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:22,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982328625] [2021-01-06 09:42:22,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:22,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:22,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:22,745 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2021-01-06 09:42:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:22,827 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-01-06 09:42:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:22,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-01-06 09:42:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:22,831 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:42:22,831 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:42:22,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 09:42:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:42:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-01-06 09:42:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:42:22,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-06 09:42:22,849 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-01-06 09:42:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:22,850 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-06 09:42:22,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-06 09:42:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:42:22,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:22,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:23,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:23,068 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1993618671, now seen corresponding path program 3 times [2021-01-06 09:42:23,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:23,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985006736] [2021-01-06 09:42:23,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:23,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985006736] [2021-01-06 09:42:23,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975905017] [2021-01-06 09:42:23,208 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 09:42:23,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:42:23,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:23,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:23,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:23,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:42:23,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546584624] [2021-01-06 09:42:23,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:42:23,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:42:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:42:23,332 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2021-01-06 09:42:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:23,354 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-01-06 09:42:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:42:23,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 09:42:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:23,355 INFO L225 Difference]: With dead ends: 60 [2021-01-06 09:42:23,356 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:42:23,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:42:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:42:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 09:42:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:42:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-01-06 09:42:23,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2021-01-06 09:42:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:23,362 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-01-06 09:42:23,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:42:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-01-06 09:42:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:42:23,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:23,364 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:23,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:23,577 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash 391245135, now seen corresponding path program 4 times [2021-01-06 09:42:23,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:23,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708336508] [2021-01-06 09:42:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:23,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708336508] [2021-01-06 09:42:23,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050202515] [2021-01-06 09:42:23,686 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 09:42:23,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:23,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:23,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:23,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:23,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:23,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:42:23,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302979378] [2021-01-06 09:42:23,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:42:23,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:23,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:42:23,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:23,817 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2021-01-06 09:42:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:23,843 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-01-06 09:42:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:42:23,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 09:42:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:23,844 INFO L225 Difference]: With dead ends: 62 [2021-01-06 09:42:23,844 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 09:42:23,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 09:42:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 09:42:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 09:42:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:42:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-01-06 09:42:23,850 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2021-01-06 09:42:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:23,851 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-01-06 09:42:23,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:42:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-01-06 09:42:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:42:23,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:23,852 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:24,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:42:24,067 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:24,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173363, now seen corresponding path program 5 times [2021-01-06 09:42:24,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:24,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46813309] [2021-01-06 09:42:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:24,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46813309] [2021-01-06 09:42:24,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480601224] [2021-01-06 09:42:24,142 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 09:42:24,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 09:42:24,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:24,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:42:24,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:24,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 09:42:24,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872089118] [2021-01-06 09:42:24,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:42:24,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:24,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:42:24,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:24,644 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2021-01-06 09:42:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:24,767 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-01-06 09:42:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:24,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2021-01-06 09:42:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:24,768 INFO L225 Difference]: With dead ends: 73 [2021-01-06 09:42:24,768 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:42:24,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:24,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:42:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-01-06 09:42:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:42:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-01-06 09:42:24,775 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2021-01-06 09:42:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:24,776 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-01-06 09:42:24,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:42:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-01-06 09:42:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:42:24,777 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:24,777 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:24,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:24,992 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash -91572603, now seen corresponding path program 6 times [2021-01-06 09:42:24,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:24,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164133581] [2021-01-06 09:42:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 09:42:25,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164133581] [2021-01-06 09:42:25,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947471361] [2021-01-06 09:42:25,074 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 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 09:42:25,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 09:42:25,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:25,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-01-06 09:42:25,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:25,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-01-06 09:42:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871831931] [2021-01-06 09:42:25,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:42:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:42:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:25,367 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 12 states. [2021-01-06 09:42:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:25,470 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-01-06 09:42:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:42:25,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2021-01-06 09:42:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:25,471 INFO L225 Difference]: With dead ends: 87 [2021-01-06 09:42:25,471 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:42:25,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:42:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-01-06 09:42:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:42:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-01-06 09:42:25,478 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2021-01-06 09:42:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:25,479 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-01-06 09:42:25,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:42:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-01-06 09:42:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:42:25,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:25,480 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:25,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:25,696 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash -673424131, now seen corresponding path program 7 times [2021-01-06 09:42:25,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:25,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135240728] [2021-01-06 09:42:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:25,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135240728] [2021-01-06 09:42:25,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401579264] [2021-01-06 09:42:25,814 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 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 09:42:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:25,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:42:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:25,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:25,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:42:25,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054190508] [2021-01-06 09:42:25,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:42:25,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:25,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:42:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:25,949 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 10 states. [2021-01-06 09:42:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:25,988 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-01-06 09:42:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:42:25,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2021-01-06 09:42:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:25,989 INFO L225 Difference]: With dead ends: 92 [2021-01-06 09:42:25,989 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 09:42:25,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 09:42:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 09:42:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:42:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-01-06 09:42:25,996 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 49 [2021-01-06 09:42:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:25,996 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-01-06 09:42:25,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:42:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-01-06 09:42:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:42:25,997 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:25,998 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:26,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:42:26,213 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash 883487803, now seen corresponding path program 8 times [2021-01-06 09:42:26,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649339076] [2021-01-06 09:42:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:26,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649339076] [2021-01-06 09:42:26,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339356114] [2021-01-06 09:42:26,339 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 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 09:42:26,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:26,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:26,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:42:26,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:26,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:26,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:42:26,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822598044] [2021-01-06 09:42:26,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:42:26,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:42:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:26,483 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2021-01-06 09:42:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:26,531 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2021-01-06 09:42:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:26,533 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2021-01-06 09:42:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:26,537 INFO L225 Difference]: With dead ends: 94 [2021-01-06 09:42:26,538 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 09:42:26,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 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 09:42:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 09:42:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 09:42:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:42:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 09:42:26,546 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 51 [2021-01-06 09:42:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:26,546 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 09:42:26,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:42:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 09:42:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:42:26,547 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:26,548 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:26,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:26,754 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1867729927, now seen corresponding path program 9 times [2021-01-06 09:42:26,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145843250] [2021-01-06 09:42:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:26,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145843250] [2021-01-06 09:42:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122521591] [2021-01-06 09:42:26,889 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 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 09:42:27,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 09:42:27,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:27,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:42:27,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-01-06 09:42:27,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:27,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-01-06 09:42:27,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135660695] [2021-01-06 09:42:27,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:42:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:42:27,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:42:27,228 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 16 states. [2021-01-06 09:42:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:27,386 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2021-01-06 09:42:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:42:27,387 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2021-01-06 09:42:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:27,388 INFO L225 Difference]: With dead ends: 105 [2021-01-06 09:42:27,388 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 09:42:27,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:42:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 09:42:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-01-06 09:42:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:42:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 09:42:27,395 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 53 [2021-01-06 09:42:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:27,396 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 09:42:27,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:42:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 09:42:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:42:27,397 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:27,397 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:27,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:27,611 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:27,612 INFO L82 PathProgramCache]: Analyzing trace with hash -179501455, now seen corresponding path program 10 times [2021-01-06 09:42:27,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:27,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645260557] [2021-01-06 09:42:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 09:42:27,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645260557] [2021-01-06 09:42:27,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335108902] [2021-01-06 09:42:27,804 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 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 09:42:27,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:42:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 09:42:27,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:27,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:42:27,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899134530] [2021-01-06 09:42:27,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:42:27,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:42:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:42:27,954 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 13 states. [2021-01-06 09:42:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:28,007 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-01-06 09:42:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:42:28,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2021-01-06 09:42:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:28,009 INFO L225 Difference]: With dead ends: 110 [2021-01-06 09:42:28,009 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:42:28,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:42:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:42:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 09:42:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 09:42:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-01-06 09:42:28,031 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 61 [2021-01-06 09:42:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:28,031 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-01-06 09:42:28,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:42:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-01-06 09:42:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:42:28,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:28,033 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:28,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:42:28,238 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1934970705, now seen corresponding path program 11 times [2021-01-06 09:42:28,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:28,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854851435] [2021-01-06 09:42:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 09:42:28,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854851435] [2021-01-06 09:42:28,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128451538] [2021-01-06 09:42:28,416 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 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