/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/ldv-sets/test_mutex_unlock_at_exit.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:28:29,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:28:29,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:28:29,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:28:29,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:28:29,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:28:29,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:28:29,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:28:29,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:28:29,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:28:29,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:28:29,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:28:29,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:28:29,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:28:29,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:28:29,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:28:29,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:28:29,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:28:29,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:28:29,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:28:29,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:28:29,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:28:29,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:28:29,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:28:29,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:28:29,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:28:29,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:28:29,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:28:29,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:28:29,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:28:29,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:28:29,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:28:29,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:28:29,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:28:29,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:28:29,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:28:29,410 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 06:28:29,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:28:29,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:28:29,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:28:29,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:28:29,468 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:28:29,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:28:29,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:28:29,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:28:29,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:28:29,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:28:29,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:28:29,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:28:29,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:28:29,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:28:29,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:28:29,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:28:29,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:28:29,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:28:29,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:28:29,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:28:29,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:28:29,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:28:29,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:28:29,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:28:29,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:28:29,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:28:29,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:28:29,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:28:29,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:28:29,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:28:29,927 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:28:29,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2020-12-23 06:28:30,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9643e3d58/d5416c746ba048dda23b68cda9aab2a4/FLAG0ebbc57d0 [2020-12-23 06:28:30,809 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:28:30,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2020-12-23 06:28:30,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9643e3d58/d5416c746ba048dda23b68cda9aab2a4/FLAG0ebbc57d0 [2020-12-23 06:28:31,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9643e3d58/d5416c746ba048dda23b68cda9aab2a4 [2020-12-23 06:28:31,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:28:31,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:28:31,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:28:31,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:28:31,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:28:31,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ecd4174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31, skipping insertion in model container [2020-12-23 06:28:31,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:28:31,175 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~list,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~next,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~next,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new,],base],StructAccessExpression[IdentifierExpression[~new,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~new,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~prev,],base],StructAccessExpression[IdentifierExpression[~prev,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~next,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~next,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~prev,],base],StructAccessExpression[IdentifierExpression[~prev,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~le~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~le~0,],base],StructAccessExpression[IdentifierExpression[~le~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~m~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~m~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~m~1,] left hand side expression in assignment: lhs: VariableLHS[~m~1,] [2020-12-23 06:28:31,553 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/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2020-12-23 06:28:31,558 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/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2020-12-23 06:28:31,560 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/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2020-12-23 06:28:31,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:28:31,574 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~list,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~next,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~next,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new,],base],StructAccessExpression[IdentifierExpression[~new,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~new,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~prev,],base],StructAccessExpression[IdentifierExpression[~prev,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~next,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~next,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~prev,],base],StructAccessExpression[IdentifierExpression[~prev,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~le~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~le~0,],base],StructAccessExpression[IdentifierExpression[~le~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~m~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~m~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~m~1,] left hand side expression in assignment: lhs: VariableLHS[~m~1,] [2020-12-23 06:28:31,657 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/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2020-12-23 06:28:31,658 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/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2020-12-23 06:28:31,659 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/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2020-12-23 06:28:31,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:28:31,799 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:28:31,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31 WrapperNode [2020-12-23 06:28:31,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:28:31,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:28:31,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:28:31,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:28:31,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:28:31,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:28:31,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:28:31,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:28:31,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (1/1) ... [2020-12-23 06:28:31,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:28:31,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:28:31,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:28:31,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:28:31,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (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 06:28:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 06:28:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 06:28:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:28:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 06:28:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:28:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-23 06:28:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:28:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:28:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:28:32,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:28:32,814 INFO L299 CfgBuilder]: Removed 70 assume(true) statements. [2020-12-23 06:28:32,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:28:32 BoogieIcfgContainer [2020-12-23 06:28:32,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:28:32,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:28:32,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:28:32,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:28:32,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:28:31" (1/3) ... [2020-12-23 06:28:32,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3060885a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:28:32, skipping insertion in model container [2020-12-23 06:28:32,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:28:31" (2/3) ... [2020-12-23 06:28:32,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3060885a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:28:32, skipping insertion in model container [2020-12-23 06:28:32,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:28:32" (3/3) ... [2020-12-23 06:28:32,828 INFO L111 eAbstractionObserver]: Analyzing ICFG test_mutex_unlock_at_exit.i [2020-12-23 06:28:32,837 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:28:32,843 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-23 06:28:32,869 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-23 06:28:32,903 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:28:32,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:28:32,904 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:28:32,904 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:28:32,904 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:28:32,904 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:28:32,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:28:32,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:28:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-12-23 06:28:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:28:32,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:32,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:32,934 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:32,942 INFO L82 PathProgramCache]: Analyzing trace with hash 912087840, now seen corresponding path program 1 times [2020-12-23 06:28:32,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:32,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864790438] [2020-12-23 06:28:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:33,144 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 06:28:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864790438] [2020-12-23 06:28:33,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:28:33,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:28:33,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007686275] [2020-12-23 06:28:33,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:28:33,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:33,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:28:33,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:28:33,173 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 2 states. [2020-12-23 06:28:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:33,204 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2020-12-23 06:28:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:28:33,205 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-23 06:28:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:33,216 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:28:33,217 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 06:28:33,221 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 06:28:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 06:28:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-23 06:28:33,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 06:28:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-12-23 06:28:33,269 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 14 [2020-12-23 06:28:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:33,270 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-12-23 06:28:33,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:28:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-12-23 06:28:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:28:33,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:33,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:33,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:28:33,272 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash 793647061, now seen corresponding path program 1 times [2020-12-23 06:28:33,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:33,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837164084] [2020-12-23 06:28:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:33,385 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 06:28:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837164084] [2020-12-23 06:28:33,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:28:33,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:28:33,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666804592] [2020-12-23 06:28:33,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:28:33,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:33,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:28:33,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:28:33,390 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 4 states. [2020-12-23 06:28:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:33,506 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-12-23 06:28:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:28:33,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 06:28:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:33,508 INFO L225 Difference]: With dead ends: 109 [2020-12-23 06:28:33,508 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 06:28:33,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:28:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 06:28:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2020-12-23 06:28:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 06:28:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-12-23 06:28:33,521 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 14 [2020-12-23 06:28:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:33,521 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-12-23 06:28:33,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:28:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-12-23 06:28:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:28:33,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:33,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:33,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:28:33,523 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:33,524 INFO L82 PathProgramCache]: Analyzing trace with hash 795255775, now seen corresponding path program 1 times [2020-12-23 06:28:33,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:33,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347246401] [2020-12-23 06:28:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:33,678 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 06:28:33,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347246401] [2020-12-23 06:28:33,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:28:33,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:28:33,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394645088] [2020-12-23 06:28:33,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:28:33,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:28:33,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:28:33,682 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 4 states. [2020-12-23 06:28:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:33,950 INFO L93 Difference]: Finished difference Result 172 states and 202 transitions. [2020-12-23 06:28:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:28:33,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 06:28:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:33,952 INFO L225 Difference]: With dead ends: 172 [2020-12-23 06:28:33,952 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 06:28:33,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:28:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 06:28:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2020-12-23 06:28:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:28:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-12-23 06:28:33,968 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 14 [2020-12-23 06:28:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:33,968 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-12-23 06:28:33,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:28:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-12-23 06:28:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:28:33,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:33,970 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:33,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:28:33,970 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:33,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1115638045, now seen corresponding path program 1 times [2020-12-23 06:28:33,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:33,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334966796] [2020-12-23 06:28:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:34,490 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 06:28:34,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334966796] [2020-12-23 06:28:34,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:28:34,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-23 06:28:34,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840308141] [2020-12-23 06:28:34,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:28:34,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:34,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:28:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:28:34,499 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 15 states. [2020-12-23 06:28:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:35,687 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2020-12-23 06:28:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:28:35,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-23 06:28:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:35,689 INFO L225 Difference]: With dead ends: 157 [2020-12-23 06:28:35,689 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 06:28:35,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:28:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 06:28:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2020-12-23 06:28:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:28:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-12-23 06:28:35,703 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 28 [2020-12-23 06:28:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:35,704 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-12-23 06:28:35,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:28:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-12-23 06:28:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:28:35,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:35,706 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:35,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:28:35,706 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:35,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:35,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1190752804, now seen corresponding path program 1 times [2020-12-23 06:28:35,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:35,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124322187] [2020-12-23 06:28:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:28:36,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124322187] [2020-12-23 06:28:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861837772] [2020-12-23 06:28:36,021 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 06:28:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:36,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 120 conjunts are in the unsatisfiable core [2020-12-23 06:28:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:28:36,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:36,981 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-23 06:28:36,982 INFO L348 Elim1Store]: treesize reduction 66, result has 78.7 percent of original size [2020-12-23 06:28:36,982 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 538 treesize of output 530 [2020-12-23 06:28:36,991 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:28:37,104 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-23 06:28:37,105 INFO L625 ElimStorePlain]: treesize reduction 177, result has 66.3 percent of original size [2020-12-23 06:28:37,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:37,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:37,122 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:28:37,135 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:28:37,136 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 83 [2020-12-23 06:28:37,140 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:28:37,218 INFO L625 ElimStorePlain]: treesize reduction 38, result has 73.4 percent of original size [2020-12-23 06:28:37,223 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:28:37,223 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:639, output treesize:121 [2020-12-23 06:28:37,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:37,434 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:28:37,435 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 140 treesize of output 128 [2020-12-23 06:28:37,442 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-12-23 06:28:37,451 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 06:28:37,470 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:28:37,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:37,487 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:28:37,488 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 50 [2020-12-23 06:28:37,491 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:28:37,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:28:37,502 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:28:37,503 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:153, output treesize:15 [2020-12-23 06:28:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:28:37,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:28:37,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2020-12-23 06:28:37,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418013162] [2020-12-23 06:28:37,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:28:37,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:28:37,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:28:37,548 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 17 states. [2020-12-23 06:28:37,988 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-12-23 06:28:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:39,287 INFO L93 Difference]: Finished difference Result 237 states and 269 transitions. [2020-12-23 06:28:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:28:39,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-12-23 06:28:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:39,292 INFO L225 Difference]: With dead ends: 237 [2020-12-23 06:28:39,293 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 06:28:39,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:28:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 06:28:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 83. [2020-12-23 06:28:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 06:28:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-12-23 06:28:39,335 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 31 [2020-12-23 06:28:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:39,340 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-12-23 06:28:39,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:28:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-12-23 06:28:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:28:39,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:39,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:39,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:28:39,547 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:39,548 INFO L82 PathProgramCache]: Analyzing trace with hash 251401029, now seen corresponding path program 1 times [2020-12-23 06:28:39,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:39,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191531604] [2020-12-23 06:28:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:39,592 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 06:28:39,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191531604] [2020-12-23 06:28:39,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:28:39,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:28:39,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116857061] [2020-12-23 06:28:39,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:28:39,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:39,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:28:39,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:28:39,594 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 4 states. [2020-12-23 06:28:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:39,661 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-12-23 06:28:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:28:39,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-12-23 06:28:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:39,663 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:28:39,663 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 06:28:39,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:28:39,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 06:28:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2020-12-23 06:28:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 06:28:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-12-23 06:28:39,675 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 34 [2020-12-23 06:28:39,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:39,675 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-12-23 06:28:39,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:28:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-12-23 06:28:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 06:28:39,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:39,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:39,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 06:28:39,677 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:39,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1769595066, now seen corresponding path program 1 times [2020-12-23 06:28:39,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:39,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765110859] [2020-12-23 06:28:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:28:39,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765110859] [2020-12-23 06:28:39,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:28:39,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:28:39,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025564331] [2020-12-23 06:28:39,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:28:39,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:39,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:28:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:28:39,738 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 4 states. [2020-12-23 06:28:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:39,781 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-12-23 06:28:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:28:39,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-12-23 06:28:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:39,783 INFO L225 Difference]: With dead ends: 91 [2020-12-23 06:28:39,783 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 06:28:39,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:28:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 06:28:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2020-12-23 06:28:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 06:28:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-12-23 06:28:39,795 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 41 [2020-12-23 06:28:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:39,795 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-12-23 06:28:39,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:28:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-12-23 06:28:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:28:39,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:39,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:39,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 06:28:39,798 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:39,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1130333060, now seen corresponding path program 1 times [2020-12-23 06:28:39,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:39,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78256807] [2020-12-23 06:28:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:28:40,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78256807] [2020-12-23 06:28:40,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062529016] [2020-12-23 06:28:40,373 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 06:28:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:40,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 168 conjunts are in the unsatisfiable core [2020-12-23 06:28:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:28:40,568 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 06:28:40,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:28:40,575 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:28:40,576 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:28:40,576 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 06:28:40,670 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:28:40,670 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-23 06:28:40,677 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:28:40,681 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:28:40,686 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:28:40,687 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:28:40,687 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2020-12-23 06:28:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:40,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:41,151 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-12-23 06:28:41,152 INFO L348 Elim1Store]: treesize reduction 42, result has 75.9 percent of original size [2020-12-23 06:28:41,153 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 155 [2020-12-23 06:28:41,160 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:28:41,418 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-23 06:28:41,418 INFO L625 ElimStorePlain]: treesize reduction 76, result has 75.8 percent of original size [2020-12-23 06:28:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:41,561 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-12-23 06:28:41,562 INFO L348 Elim1Store]: treesize reduction 109, result has 37.4 percent of original size [2020-12-23 06:28:41,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 88 [2020-12-23 06:28:41,569 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:28:41,702 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-12-23 06:28:41,708 INFO L625 ElimStorePlain]: treesize reduction 18, result has 88.6 percent of original size [2020-12-23 06:28:41,716 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:28:41,720 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:28:41,721 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:327, output treesize:302 [2020-12-23 06:28:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:28:42,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:28:42,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2020-12-23 06:28:42,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015115289] [2020-12-23 06:28:42,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:28:42,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:28:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:28:42,579 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 34 states. [2020-12-23 06:28:44,195 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-12-23 06:28:44,560 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-23 06:28:44,884 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-12-23 06:28:45,178 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-12-23 06:28:45,450 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-12-23 06:28:45,692 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-12-23 06:28:45,956 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-12-23 06:28:46,204 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-12-23 06:28:46,432 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-12-23 06:28:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:47,272 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-12-23 06:28:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:28:47,273 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 44 [2020-12-23 06:28:47,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:47,274 INFO L225 Difference]: With dead ends: 110 [2020-12-23 06:28:47,274 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 06:28:47,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:28:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 06:28:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-12-23 06:28:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 06:28:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-12-23 06:28:47,286 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 44 [2020-12-23 06:28:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:47,287 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-12-23 06:28:47,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:28:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-12-23 06:28:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:28:47,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:47,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:47,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:28:47,494 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:47,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:47,495 INFO L82 PathProgramCache]: Analyzing trace with hash 786851695, now seen corresponding path program 1 times [2020-12-23 06:28:47,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:47,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136696300] [2020-12-23 06:28:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:28:47,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136696300] [2020-12-23 06:28:47,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:28:47,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 06:28:47,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974733584] [2020-12-23 06:28:47,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:28:47,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:28:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:28:47,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:28:47,709 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 8 states. [2020-12-23 06:28:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:28:48,062 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2020-12-23 06:28:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:28:48,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-12-23 06:28:48,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:28:48,063 INFO L225 Difference]: With dead ends: 117 [2020-12-23 06:28:48,064 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 06:28:48,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:28:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 06:28:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2020-12-23 06:28:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 06:28:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-12-23 06:28:48,079 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 48 [2020-12-23 06:28:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:28:48,079 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-12-23 06:28:48,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:28:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-12-23 06:28:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 06:28:48,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:28:48,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:28:48,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 06:28:48,082 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:28:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:28:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1434516829, now seen corresponding path program 1 times [2020-12-23 06:28:48,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:28:48,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736587491] [2020-12-23 06:28:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:28:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:48,535 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 06:28:48,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736587491] [2020-12-23 06:28:48,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327488518] [2020-12-23 06:28:48,536 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 06:28:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:28:48,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 128 conjunts are in the unsatisfiable core [2020-12-23 06:28:48,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:28:48,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:28:48,961 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:28:49,192 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-23 06:28:49,193 INFO L348 Elim1Store]: treesize reduction 42, result has 83.7 percent of original size [2020-12-23 06:28:49,193 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 240 [2020-12-23 06:28:49,201 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:28:49,335 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-12-23 06:28:49,336 INFO L625 ElimStorePlain]: treesize reduction 140, result has 41.7 percent of original size [2020-12-23 06:28:49,346 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:28:49,349 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:28:49,352 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:28:49,352 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:156, output treesize:54 [2020-12-23 06:28:49,354 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:28:49,410 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:28:49,465 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:01,783 WARN L197 SmtUtils]: Spent 12.26 s on a formula simplification that was a NOOP. DAG size: 39 [2020-12-23 06:29:02,102 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:02,166 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:02,234 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:02,289 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:16,391 WARN L197 SmtUtils]: Spent 14.04 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-23 06:29:16,851 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:33,508 WARN L197 SmtUtils]: Spent 16.60 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 06:29:33,543 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:52,677 WARN L197 SmtUtils]: Spent 19.07 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 06:29:52,765 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 7, 1] term [2020-12-23 06:29:52,766 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 06:29:52,789 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:52,821 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:29:52,907 INFO L443 ElimStorePlain]: Different costs {0=[v_prenex_25, v_prenex_32, |v_#memory_$Pointer$.base_38|], 51=[v_prenex_27, v_prenex_34], 69=[|v_#memory_$Pointer$.offset_39|]} [2020-12-23 06:29:56,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:29:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:29:58,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:29:58,320 INFO L244 Elim1Store]: Index analysis took 5217 ms [2020-12-23 06:30:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:30:09,875 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_ldv_set_add_~le~0.base) v_prenex_24) ULTIMATE.start___ldv_list_add_~new.base) [2020-12-23 06:30:11,909 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select |#memory_$Pointer$.base| ULTIMATE.start_ldv_set_add_~le~0.base) v_prenex_24) v_prenex_23) [2020-12-23 06:30:15,977 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-23 06:30:15,979 INFO L348 Elim1Store]: treesize reduction 143, result has 54.5 percent of original size [2020-12-23 06:30:15,979 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 189 treesize of output 194 [2020-12-23 06:30:15,983 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:31:45,647 WARN L197 SmtUtils]: Spent 1.49 m on a formula simplification. DAG size of input: 190 DAG size of output: 179 [2020-12-23 06:31:45,648 INFO L625 ElimStorePlain]: treesize reduction 76, result has 94.2 percent of original size [2020-12-23 06:31:49,717 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= ULTIMATE.start_ldv_set_add_~le~0.base ULTIMATE.start___ldv_list_add_~new.base) [2020-12-23 06:31:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:31:52,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:31:53,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:31:53,242 INFO L244 Elim1Store]: Index analysis took 7030 ms [2020-12-23 06:31:57,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:32:02,362 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-23 06:32:02,363 INFO L348 Elim1Store]: treesize reduction 143, result has 54.5 percent of original size [2020-12-23 06:32:02,364 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 189 treesize of output 194 [2020-12-23 06:32:02,372 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts.