/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-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:38:53,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:38:53,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:38:54,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:38:54,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:38:54,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:38:54,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:38:54,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:38:54,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:38:54,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:38:54,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:38:54,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:38:54,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:38:54,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:38:54,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:38:54,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:38:54,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:38:54,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:38:54,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:38:54,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:38:54,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:38:54,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:38:54,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:38:54,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:38:54,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:38:54,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:38:54,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:38:54,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:38:54,087 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:38:54,118 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:38:54,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:38:54,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:38:54,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:38:54,121 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:38:54,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:38:54,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:38:54,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:38:54,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:38:54,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:38:54,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:38:54,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:38:54,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:38:54,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:38:54,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:38:54,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:38:54,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:38:54,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:38:54,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:38:54,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:38:54,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:38:54,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:38:54,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:38:54,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:38:54,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:38:54,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:38:54,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:38:54,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:38:54,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:38:54,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:38:54,667 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:38:54,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome2-1.i [2020-12-23 00:38:54,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/61c93cfe3/1f0f484d611143c783998cb9c04b2b39/FLAG991b26cab [2020-12-23 00:38:55,478 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:38:55,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome2-1.i [2020-12-23 00:38:55,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/61c93cfe3/1f0f484d611143c783998cb9c04b2b39/FLAG991b26cab [2020-12-23 00:38:55,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/61c93cfe3/1f0f484d611143c783998cb9c04b2b39 [2020-12-23 00:38:55,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:38:55,845 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:38:55,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:38:55,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:38:55,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:38:55,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:38:55" (1/1) ... [2020-12-23 00:38:55,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c21b825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:55, skipping insertion in model container [2020-12-23 00:38:55,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:38:55" (1/1) ... [2020-12-23 00:38:55,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:38:55,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:38:56,065 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-programs/copysome2-1.i[804,817] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~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[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:38:56,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:38:56,101 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:38:56,117 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-programs/copysome2-1.i[804,817] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~i~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[~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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],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[~#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[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~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[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:38:56,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:38:56,148 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:38:56,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56 WrapperNode [2020-12-23 00:38:56,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:38:56,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:38:56,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:38:56,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:38:56,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:38:56,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:38:56,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:38:56,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:38:56,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (1/1) ... [2020-12-23 00:38:56,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:38:56,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:38:56,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:38:56,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:38:56,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (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 [2020-12-23 00:38:56,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:38:56,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:38:56,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:38:56,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:38:56,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:38:56,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:38:56,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:38:56,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:38:56,791 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 00:38:56,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:38:56 BoogieIcfgContainer [2020-12-23 00:38:56,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:38:56,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:38:56,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:38:56,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:38:56,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:38:55" (1/3) ... [2020-12-23 00:38:56,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d6c4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:38:56, skipping insertion in model container [2020-12-23 00:38:56,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:56" (2/3) ... [2020-12-23 00:38:56,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d6c4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:38:56, skipping insertion in model container [2020-12-23 00:38:56,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:38:56" (3/3) ... [2020-12-23 00:38:56,816 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2020-12-23 00:38:56,851 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:38:56,863 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:38:56,898 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:38:56,946 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:38:56,948 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:38:56,948 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:38:56,949 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:38:56,949 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:38:56,949 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:38:56,949 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:38:56,949 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:38:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 00:38:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:38:56,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:56,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:56,987 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:56,994 INFO L82 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2020-12-23 00:38:57,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:57,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721062384] [2020-12-23 00:38:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:57,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721062384] [2020-12-23 00:38:57,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:38:57,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:38:57,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990011941] [2020-12-23 00:38:57,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:38:57,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:38:57,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:38:57,273 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-23 00:38:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:57,293 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-23 00:38:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:38:57,295 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 00:38:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:57,315 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:38:57,316 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 00:38:57,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:38:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 00:38:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 00:38:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:38:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-23 00:38:57,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2020-12-23 00:38:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:57,358 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-23 00:38:57,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:38:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-23 00:38:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:38:57,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:57,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:57,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:38:57,361 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:57,364 INFO L82 PathProgramCache]: Analyzing trace with hash -631716997, now seen corresponding path program 1 times [2020-12-23 00:38:57,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:57,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025686750] [2020-12-23 00:38:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:57,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025686750] [2020-12-23 00:38:57,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:38:57,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:38:57,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215072173] [2020-12-23 00:38:57,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:38:57,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:57,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:38:57,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:38:57,455 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-23 00:38:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:57,522 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-12-23 00:38:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:38:57,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-23 00:38:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:57,524 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:38:57,524 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:38:57,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:38:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:38:57,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-23 00:38:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:38:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-23 00:38:57,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2020-12-23 00:38:57,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:57,532 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-23 00:38:57,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:38:57,532 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-23 00:38:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:38:57,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:57,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:57,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:38:57,533 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2020-12-23 00:38:57,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:57,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482867417] [2020-12-23 00:38:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:38:57,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482867417] [2020-12-23 00:38:57,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517136788] [2020-12-23 00:38:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:57,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:38:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:38:57,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:57,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:38:57,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926579284] [2020-12-23 00:38:57,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:38:57,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:57,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:38:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:38:57,786 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2020-12-23 00:38:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:57,881 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-12-23 00:38:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:38:57,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-23 00:38:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:57,883 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:38:57,883 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:38:57,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:38:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:38:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-12-23 00:38:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:38:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-23 00:38:57,891 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2020-12-23 00:38:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:57,891 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-23 00:38:57,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:38:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-23 00:38:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:38:57,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:57,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:58,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:38:58,107 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash -890123177, now seen corresponding path program 2 times [2020-12-23 00:38:58,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:58,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290294035] [2020-12-23 00:38:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 00:38:58,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290294035] [2020-12-23 00:38:58,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:38:58,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:38:58,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087305813] [2020-12-23 00:38:58,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:38:58,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:58,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:38:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:38:58,287 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-12-23 00:38:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:58,353 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-12-23 00:38:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:38:58,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-23 00:38:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:58,355 INFO L225 Difference]: With dead ends: 50 [2020-12-23 00:38:58,355 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:38:58,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:38:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:38:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 00:38:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:38:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 00:38:58,362 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 27 [2020-12-23 00:38:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:58,362 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 00:38:58,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:38:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 00:38:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:38:58,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:58,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:58,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:38:58,364 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -497096167, now seen corresponding path program 1 times [2020-12-23 00:38:58,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:58,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371435316] [2020-12-23 00:38:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:38:58,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371435316] [2020-12-23 00:38:58,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100734082] [2020-12-23 00:38:58,446 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 [2020-12-23 00:38:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:38:58,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 00:38:58,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:58,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:38:58,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726330542] [2020-12-23 00:38:58,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:38:58,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:38:58,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:38:58,584 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2020-12-23 00:38:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:58,727 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-12-23 00:38:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:38:58,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-23 00:38:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:58,729 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:38:58,729 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:38:58,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:38:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:38:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-12-23 00:38:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 00:38:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-23 00:38:58,738 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 27 [2020-12-23 00:38:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:58,738 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-23 00:38:58,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:38:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-23 00:38:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:38:58,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:58,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:58,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:58,956 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:58,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1104364036, now seen corresponding path program 1 times [2020-12-23 00:38:58,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:58,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885388236] [2020-12-23 00:38:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:38:59,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885388236] [2020-12-23 00:38:59,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157548779] [2020-12-23 00:38:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:38:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:38:59,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:59,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:38:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376548819] [2020-12-23 00:38:59,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:38:59,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:38:59,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:38:59,208 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-12-23 00:38:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:59,315 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-12-23 00:38:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:38:59,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:38:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:59,333 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:38:59,333 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:38:59,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:38:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:38:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-12-23 00:38:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:38:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 00:38:59,342 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 35 [2020-12-23 00:38:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:59,343 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 00:38:59,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:38:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 00:38:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:38:59,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:59,345 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:59,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:59,560 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash 989483061, now seen corresponding path program 2 times [2020-12-23 00:38:59,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:59,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191937654] [2020-12-23 00:38:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-23 00:38:59,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191937654] [2020-12-23 00:38:59,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799212410] [2020-12-23 00:38:59,648 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:59,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:38:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:38:59,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 00:38:59,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:59,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-12-23 00:38:59,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933888427] [2020-12-23 00:38:59,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:38:59,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:59,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:38:59,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:38:59,836 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-12-23 00:39:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:00,075 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2020-12-23 00:39:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:39:00,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-12-23 00:39:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:00,078 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:39:00,079 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:39:00,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:39:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-23 00:39:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:39:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-12-23 00:39:00,091 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 43 [2020-12-23 00:39:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:00,091 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-12-23 00:39:00,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:39:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-12-23 00:39:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:39:00,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:00,094 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:00,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:00,307 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash -699697486, now seen corresponding path program 3 times [2020-12-23 00:39:00,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:00,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958356725] [2020-12-23 00:39:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:39:00,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958356725] [2020-12-23 00:39:00,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056297928] [2020-12-23 00:39:00,437 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:00,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:39:00,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:00,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:39:00,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:39:00,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:00,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-12-23 00:39:00,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236593151] [2020-12-23 00:39:00,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:39:00,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:00,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:39:00,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:39:00,748 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 16 states. [2020-12-23 00:39:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:01,290 INFO L93 Difference]: Finished difference Result 175 states and 221 transitions. [2020-12-23 00:39:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:39:01,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-12-23 00:39:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:01,293 INFO L225 Difference]: With dead ends: 175 [2020-12-23 00:39:01,294 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 00:39:01,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:39:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 00:39:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2020-12-23 00:39:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 00:39:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2020-12-23 00:39:01,309 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 67 [2020-12-23 00:39:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:01,309 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2020-12-23 00:39:01,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:39:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2020-12-23 00:39:01,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 00:39:01,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:01,313 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:01,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:01,527 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:01,528 INFO L82 PathProgramCache]: Analyzing trace with hash -144131101, now seen corresponding path program 4 times [2020-12-23 00:39:01,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:01,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70138881] [2020-12-23 00:39:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 00:39:01,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70138881] [2020-12-23 00:39:01,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212274422] [2020-12-23 00:39:01,807 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:01,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:01,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:01,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:39:01,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-12-23 00:39:02,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:02,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2020-12-23 00:39:02,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545347639] [2020-12-23 00:39:02,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:39:02,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:02,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:39:02,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:02,047 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand 4 states. [2020-12-23 00:39:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:02,106 INFO L93 Difference]: Finished difference Result 248 states and 305 transitions. [2020-12-23 00:39:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:39:02,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-12-23 00:39:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:02,109 INFO L225 Difference]: With dead ends: 248 [2020-12-23 00:39:02,109 INFO L226 Difference]: Without dead ends: 180 [2020-12-23 00:39:02,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-23 00:39:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2020-12-23 00:39:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:39:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-12-23 00:39:02,143 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 107 [2020-12-23 00:39:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:02,144 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-12-23 00:39:02,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:39:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-12-23 00:39:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 00:39:02,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:02,158 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:02,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:02,360 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:02,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1579016539, now seen corresponding path program 5 times [2020-12-23 00:39:02,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:02,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169308607] [2020-12-23 00:39:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 00:39:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169308607] [2020-12-23 00:39:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313970251] [2020-12-23 00:39:02,618 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 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