/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/memsafety/960521-1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:09:07,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:09:07,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:09:07,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:09:07,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:09:07,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:09:07,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:09:07,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:09:07,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:09:07,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:09:07,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:09:07,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:09:07,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:09:07,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:09:07,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:09:07,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:09:07,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:09:07,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:09:07,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:09:07,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:09:07,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:09:07,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:09:07,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:09:07,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:09:07,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-07 05:09:07,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:09:07,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:09:07,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:09:07,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:09:07,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:09:07,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:09:07,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:09:07,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:09:07,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:09:07,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:09:07,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:09:07,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-01-07 05:09:07,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:09:07,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:09:07,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:09:07,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:09:07,413 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:09:07,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:09:07,414 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:09:07,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:09:07,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:09:07,415 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:09:07,415 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:09:07,415 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:09:07,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:09:07,415 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:09:07,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:09:07,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:09:07,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:09:07,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:09:07,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:09:07,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:09:07,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:09:07,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:09:07,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:09:07,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:09:07,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:09:07,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:09:07,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:09:07,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:09:07,864 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:09:07,865 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:09:07,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-2.i [2021-01-07 05:09:07,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a4aaf4bf0/36b746164fa34b03a8b0f0c8ef9e129a/FLAGf1807569d [2021-01-07 05:09:08,786 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:09:08,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-2.i [2021-01-07 05:09:08,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a4aaf4bf0/36b746164fa34b03a8b0f0c8ef9e129a/FLAGf1807569d [2021-01-07 05:09:09,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a4aaf4bf0/36b746164fa34b03a8b0f0c8ef9e129a [2021-01-07 05:09:09,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:09:09,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:09:09,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:09:09,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:09:09,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:09:09,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65e70e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09, skipping insertion in model container [2021-01-07 05:09:09,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:09:09,125 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post9,] [2021-01-07 05:09:09,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:09:09,507 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post9,] [2021-01-07 05:09:09,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:09:09,624 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:09:09,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09 WrapperNode [2021-01-07 05:09:09,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:09:09,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:09:09,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:09:09,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:09:09,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:09:09,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:09:09,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:09:09,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:09:09,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... [2021-01-07 05:09:09,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:09:09,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:09:09,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:09:09,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:09:09,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:09:09,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:09:09,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:09:09,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-07 05:09:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:09:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:09:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-07 05:09:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:09:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:09:10,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:09:10,391 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-07 05:09:10,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:10 BoogieIcfgContainer [2021-01-07 05:09:10,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:09:10,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:09:10,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:09:10,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:09:10,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:09:09" (1/3) ... [2021-01-07 05:09:10,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb8aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:09:10, skipping insertion in model container [2021-01-07 05:09:10,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:09" (2/3) ... [2021-01-07 05:09:10,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb8aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:09:10, skipping insertion in model container [2021-01-07 05:09:10,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:10" (3/3) ... [2021-01-07 05:09:10,403 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-2.i [2021-01-07 05:09:10,411 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:09:10,416 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2021-01-07 05:09:10,439 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-01-07 05:09:10,466 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:09:10,466 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:09:10,466 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:09:10,467 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:09:10,467 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:09:10,467 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:09:10,467 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:09:10,467 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:09:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2021-01-07 05:09:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-01-07 05:09:10,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:10,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-01-07 05:09:10,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:10,502 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-01-07 05:09:10,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:10,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344736723] [2021-01-07 05:09:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:10,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344736723] [2021-01-07 05:09:10,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:10,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:10,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649380972] [2021-01-07 05:09:10,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:10,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:10,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:10,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:10,740 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2021-01-07 05:09:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:10,812 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-07 05:09:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:10,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-01-07 05:09:10,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:10,823 INFO L225 Difference]: With dead ends: 49 [2021-01-07 05:09:10,824 INFO L226 Difference]: Without dead ends: 47 [2021-01-07 05:09:10,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-07 05:09:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-07 05:09:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-07 05:09:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-01-07 05:09:10,868 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2021-01-07 05:09:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:10,868 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-01-07 05:09:10,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-01-07 05:09:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-01-07 05:09:10,869 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:10,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-01-07 05:09:10,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:09:10,870 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:10,871 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-01-07 05:09:10,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:10,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654095269] [2021-01-07 05:09:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:10,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654095269] [2021-01-07 05:09:10,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:10,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:10,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127984560] [2021-01-07 05:09:10,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:10,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:10,940 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 3 states. [2021-01-07 05:09:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:10,971 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-01-07 05:09:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:10,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-01-07 05:09:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:10,973 INFO L225 Difference]: With dead ends: 46 [2021-01-07 05:09:10,973 INFO L226 Difference]: Without dead ends: 46 [2021-01-07 05:09:10,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-07 05:09:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-07 05:09:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-07 05:09:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-07 05:09:10,980 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 3 [2021-01-07 05:09:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:10,981 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-07 05:09:10,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-07 05:09:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:09:10,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:10,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:09:10,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:09:10,982 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:10,983 INFO L82 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2021-01-07 05:09:10,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:10,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660334314] [2021-01-07 05:09:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:11,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660334314] [2021-01-07 05:09:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:11,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:09:11,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458185173] [2021-01-07 05:09:11,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:09:11,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:09:11,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:09:11,050 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2021-01-07 05:09:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:11,109 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-01-07 05:09:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:11,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:09:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:11,111 INFO L225 Difference]: With dead ends: 43 [2021-01-07 05:09:11,111 INFO L226 Difference]: Without dead ends: 43 [2021-01-07 05:09:11,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:09:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-07 05:09:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-07 05:09:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-07 05:09:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-01-07 05:09:11,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2021-01-07 05:09:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:11,118 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-01-07 05:09:11,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:09:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-01-07 05:09:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:09:11,119 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:11,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:09:11,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:09:11,119 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:11,120 INFO L82 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-01-07 05:09:11,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:11,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103771514] [2021-01-07 05:09:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:11,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103771514] [2021-01-07 05:09:11,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:11,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:09:11,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121456012] [2021-01-07 05:09:11,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:09:11,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:09:11,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:09:11,277 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2021-01-07 05:09:11,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:11,377 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-07 05:09:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:09:11,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-01-07 05:09:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:11,378 INFO L225 Difference]: With dead ends: 49 [2021-01-07 05:09:11,379 INFO L226 Difference]: Without dead ends: 49 [2021-01-07 05:09:11,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:09:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-07 05:09:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-01-07 05:09:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-07 05:09:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-07 05:09:11,385 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2021-01-07 05:09:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:11,386 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-07 05:09:11,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:09:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-07 05:09:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:09:11,387 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:11,387 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:11,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:09:11,388 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2021-01-07 05:09:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:11,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382489561] [2021-01-07 05:09:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:11,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382489561] [2021-01-07 05:09:11,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540685252] [2021-01-07 05:09:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-07 05:09:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:11,682 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:11,682 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 1 case distinctions, treesize of input 13 treesize of output 15 [2021-01-07 05:09:11,684 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:11,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:11,724 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:09:11,725 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2021-01-07 05:09:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:11,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:11,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-01-07 05:09:11,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3665589] [2021-01-07 05:09:11,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-07 05:09:11,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:11,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-07 05:09:11,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:09:11,831 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 9 states. [2021-01-07 05:09:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:12,047 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-01-07 05:09:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:09:12,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-01-07 05:09:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:12,048 INFO L225 Difference]: With dead ends: 57 [2021-01-07 05:09:12,049 INFO L226 Difference]: Without dead ends: 57 [2021-01-07 05:09:12,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:09:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-07 05:09:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-01-07 05:09:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-07 05:09:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-01-07 05:09:12,055 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 9 [2021-01-07 05:09:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:12,056 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-01-07 05:09:12,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-07 05:09:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-01-07 05:09:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-07 05:09:12,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:12,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2021-01-07 05:09:12,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:12,272 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:12,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1472839145, now seen corresponding path program 2 times [2021-01-07 05:09:12,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:12,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306276770] [2021-01-07 05:09:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:12,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306276770] [2021-01-07 05:09:12,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059716988] [2021-01-07 05:09:12,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:12,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:09:12,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:12,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:09:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:12,499 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:12,503 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 1 case distinctions, treesize of input 13 treesize of output 15 [2021-01-07 05:09:12,505 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:12,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:12,516 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:09:12,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2021-01-07 05:09:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:12,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:12,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-07 05:09:12,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197019802] [2021-01-07 05:09:12,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-07 05:09:12,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:12,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-07 05:09:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:09:12,687 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2021-01-07 05:09:13,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:13,056 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2021-01-07 05:09:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:09:13,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2021-01-07 05:09:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:13,065 INFO L225 Difference]: With dead ends: 120 [2021-01-07 05:09:13,065 INFO L226 Difference]: Without dead ends: 120 [2021-01-07 05:09:13,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-01-07 05:09:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-07 05:09:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 54. [2021-01-07 05:09:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-07 05:09:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-01-07 05:09:13,073 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2021-01-07 05:09:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:13,074 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-01-07 05:09:13,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-07 05:09:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-01-07 05:09:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-07 05:09:13,075 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:13,075 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:13,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:13,290 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2021-01-07 05:09:13,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:13,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256495263] [2021-01-07 05:09:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-07 05:09:13,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256495263] [2021-01-07 05:09:13,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:13,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:09:13,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022800270] [2021-01-07 05:09:13,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:09:13,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:09:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:09:13,409 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2021-01-07 05:09:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:13,462 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-01-07 05:09:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:09:13,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-01-07 05:09:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:13,464 INFO L225 Difference]: With dead ends: 52 [2021-01-07 05:09:13,464 INFO L226 Difference]: Without dead ends: 52 [2021-01-07 05:09:13,464 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 [2021-01-07 05:09:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-07 05:09:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-07 05:09:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-07 05:09:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-01-07 05:09:13,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 20 [2021-01-07 05:09:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:13,470 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-01-07 05:09:13,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:09:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-01-07 05:09:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-07 05:09:13,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:13,471 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:13,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-07 05:09:13,471 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2021-01-07 05:09:13,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:13,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898534980] [2021-01-07 05:09:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:13,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898534980] [2021-01-07 05:09:13,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754413680] [2021-01-07 05:09:13,559 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 [2021-01-07 05:09:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-07 05:09:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:13,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:13,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-07 05:09:13,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346695999] [2021-01-07 05:09:13,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-07 05:09:13,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-07 05:09:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:09:13,756 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 13 states. [2021-01-07 05:09:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:13,870 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-01-07 05:09:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:09:13,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2021-01-07 05:09:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:13,872 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:09:13,873 INFO L226 Difference]: Without dead ends: 73 [2021-01-07 05:09:13,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:09:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-07 05:09:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-01-07 05:09:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-07 05:09:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-01-07 05:09:13,879 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 20 [2021-01-07 05:09:13,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:13,879 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-01-07 05:09:13,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-07 05:09:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-01-07 05:09:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-07 05:09:13,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:13,881 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:14,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:14,094 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash 116531578, now seen corresponding path program 2 times [2021-01-07 05:09:14,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:14,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870335217] [2021-01-07 05:09:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:14,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870335217] [2021-01-07 05:09:14,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209686297] [2021-01-07 05:09:14,197 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 [2021-01-07 05:09:14,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-07 05:09:14,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:14,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:09:14,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:14,293 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:14,294 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 1 case distinctions, treesize of input 13 treesize of output 15 [2021-01-07 05:09:14,296 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:14,308 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:14,313 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:09:14,314 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2021-01-07 05:09:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-07 05:09:14,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:09:14,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2021-01-07 05:09:14,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524153775] [2021-01-07 05:09:14,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:09:14,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:09:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:09:14,469 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 5 states. [2021-01-07 05:09:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:14,598 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-01-07 05:09:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:09:14,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-01-07 05:09:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:14,601 INFO L225 Difference]: With dead ends: 58 [2021-01-07 05:09:14,601 INFO L226 Difference]: Without dead ends: 58 [2021-01-07 05:09:14,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:09:14,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-07 05:09:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-07 05:09:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-07 05:09:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-01-07 05:09:14,615 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 23 [2021-01-07 05:09:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:14,616 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-01-07 05:09:14,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:09:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-01-07 05:09:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-07 05:09:14,618 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:14,618 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:14,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:14,829 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1258641039, now seen corresponding path program 1 times [2021-01-07 05:09:14,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:14,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554118529] [2021-01-07 05:09:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-07 05:09:14,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554118529] [2021-01-07 05:09:14,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909636373] [2021-01-07 05:09:14,997 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-07 05:09:15,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-07 05:09:15,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:15,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-07 05:09:15,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468319402] [2021-01-07 05:09:15,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-07 05:09:15,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:15,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-07 05:09:15,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-07 05:09:15,248 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 15 states. [2021-01-07 05:09:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:15,372 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-07 05:09:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:09:15,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2021-01-07 05:09:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:15,374 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:09:15,374 INFO L226 Difference]: Without dead ends: 73 [2021-01-07 05:09:15,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-07 05:09:15,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-07 05:09:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-01-07 05:09:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-07 05:09:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-01-07 05:09:15,379 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 26 [2021-01-07 05:09:15,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:15,380 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-01-07 05:09:15,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-07 05:09:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-01-07 05:09:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-07 05:09:15,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:15,381 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:15,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-07 05:09:15,595 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 2 times [2021-01-07 05:09:15,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:15,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002399351] [2021-01-07 05:09:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-07 05:09:15,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002399351] [2021-01-07 05:09:15,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114693396] [2021-01-07 05:09:15,703 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:15,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:09:15,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-07 05:09:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-07 05:09:15,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:15,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-07 05:09:15,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430929482] [2021-01-07 05:09:15,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-07 05:09:15,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:15,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-07 05:09:15,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:09:15,914 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 17 states. [2021-01-07 05:09:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:16,081 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-01-07 05:09:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:09:16,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2021-01-07 05:09:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:16,082 INFO L225 Difference]: With dead ends: 80 [2021-01-07 05:09:16,082 INFO L226 Difference]: Without dead ends: 80 [2021-01-07 05:09:16,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:09:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-07 05:09:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-01-07 05:09:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-07 05:09:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-01-07 05:09:16,091 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 29 [2021-01-07 05:09:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:16,091 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-01-07 05:09:16,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-07 05:09:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-01-07 05:09:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-07 05:09:16,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:16,092 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:16,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:16,305 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:16,306 INFO L82 PathProgramCache]: Analyzing trace with hash 611161295, now seen corresponding path program 3 times [2021-01-07 05:09:16,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:16,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241394564] [2021-01-07 05:09:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-07 05:09:16,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241394564] [2021-01-07 05:09:16,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678396666] [2021-01-07 05:09:16,429 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:16,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-07 05:09:16,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:16,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-07 05:09:16,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:16,531 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:16,531 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 1 case distinctions, treesize of input 13 treesize of output 15 [2021-01-07 05:09:16,532 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:16,543 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:16,552 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:09:16,552 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2021-01-07 05:09:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-07 05:09:16,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:09:16,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2021-01-07 05:09:16,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525730585] [2021-01-07 05:09:16,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-07 05:09:16,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-07 05:09:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:09:16,766 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2021-01-07 05:09:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:16,875 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-01-07 05:09:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:09:16,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2021-01-07 05:09:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:16,876 INFO L225 Difference]: With dead ends: 69 [2021-01-07 05:09:16,877 INFO L226 Difference]: Without dead ends: 69 [2021-01-07 05:09:16,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:09:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-07 05:09:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-07 05:09:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-07 05:09:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-07 05:09:16,881 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 32 [2021-01-07 05:09:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:16,882 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-07 05:09:16,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-07 05:09:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-07 05:09:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-07 05:09:16,883 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:16,884 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:17,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:17,099 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1172416315, now seen corresponding path program 1 times [2021-01-07 05:09:17,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:17,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658684341] [2021-01-07 05:09:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-07 05:09:17,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658684341] [2021-01-07 05:09:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100275099] [2021-01-07 05:09:17,210 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:17,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-07 05:09:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-07 05:09:17,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:17,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-01-07 05:09:17,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378324074] [2021-01-07 05:09:17,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-07 05:09:17,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:17,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-07 05:09:17,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-01-07 05:09:17,542 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 19 states. [2021-01-07 05:09:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:17,708 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-01-07 05:09:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-07 05:09:17,709 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2021-01-07 05:09:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:17,710 INFO L225 Difference]: With dead ends: 79 [2021-01-07 05:09:17,710 INFO L226 Difference]: Without dead ends: 79 [2021-01-07 05:09:17,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2021-01-07 05:09:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-07 05:09:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2021-01-07 05:09:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-07 05:09:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-01-07 05:09:17,715 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 53 [2021-01-07 05:09:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:17,715 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-01-07 05:09:17,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-07 05:09:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-01-07 05:09:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-07 05:09:17,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:17,717 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:17,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-07 05:09:17,931 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1736039872, now seen corresponding path program 2 times [2021-01-07 05:09:17,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:17,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945165390] [2021-01-07 05:09:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-07 05:09:18,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945165390] [2021-01-07 05:09:18,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015710192] [2021-01-07 05:09:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:18,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-07 05:09:18,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-07 05:09:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-01-07 05:09:18,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:09:18,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 13 [2021-01-07 05:09:18,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930632037] [2021-01-07 05:09:18,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:18,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:18,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:18,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:09:18,228 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 3 states. [2021-01-07 05:09:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:18,247 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-07 05:09:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:18,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2021-01-07 05:09:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:18,249 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:09:18,250 INFO L226 Difference]: Without dead ends: 73 [2021-01-07 05:09:18,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:09:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-07 05:09:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-07 05:09:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-07 05:09:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-01-07 05:09:18,254 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 59 [2021-01-07 05:09:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:18,254 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-01-07 05:09:18,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-01-07 05:09:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-07 05:09:18,256 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:18,256 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:18,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:18,471 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1900363372, now seen corresponding path program 1 times [2021-01-07 05:09:18,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:18,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038718335] [2021-01-07 05:09:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-07 05:09:18,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038718335] [2021-01-07 05:09:18,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926930159] [2021-01-07 05:09:18,654 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-07 05:09:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-07 05:09:18,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:18,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-07 05:09:18,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023745404] [2021-01-07 05:09:18,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-07 05:09:18,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:18,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-07 05:09:18,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-07 05:09:18,956 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 21 states. [2021-01-07 05:09:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:19,112 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-01-07 05:09:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-07 05:09:19,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2021-01-07 05:09:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:19,114 INFO L225 Difference]: With dead ends: 83 [2021-01-07 05:09:19,114 INFO L226 Difference]: Without dead ends: 83 [2021-01-07 05:09:19,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-07 05:09:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-07 05:09:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2021-01-07 05:09:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-07 05:09:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-01-07 05:09:19,117 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 61 [2021-01-07 05:09:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:19,118 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-01-07 05:09:19,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-07 05:09:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-01-07 05:09:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-07 05:09:19,119 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:19,119 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:19,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-07 05:09:19,333 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:19,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1188726905, now seen corresponding path program 2 times [2021-01-07 05:09:19,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:19,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481913441] [2021-01-07 05:09:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-07 05:09:19,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481913441] [2021-01-07 05:09:19,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862522789] [2021-01-07 05:09:19,523 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:19,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:09:19,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-07 05:09:19,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-07 05:09:19,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:19,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-01-07 05:09:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273716228] [2021-01-07 05:09:19,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-07 05:09:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-07 05:09:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-01-07 05:09:19,860 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 23 states. [2021-01-07 05:09:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:20,026 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-01-07 05:09:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-07 05:09:20,027 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2021-01-07 05:09:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:20,028 INFO L225 Difference]: With dead ends: 89 [2021-01-07 05:09:20,028 INFO L226 Difference]: Without dead ends: 89 [2021-01-07 05:09:20,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2021-01-07 05:09:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-07 05:09:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-01-07 05:09:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-07 05:09:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-01-07 05:09:20,031 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 67 [2021-01-07 05:09:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:20,032 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-01-07 05:09:20,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-07 05:09:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-01-07 05:09:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-07 05:09:20,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:20,033 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:20,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-07 05:09:20,247 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:20,248 INFO L82 PathProgramCache]: Analyzing trace with hash 822105844, now seen corresponding path program 3 times [2021-01-07 05:09:20,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:20,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578624374] [2021-01-07 05:09:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-07 05:09:20,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578624374] [2021-01-07 05:09:20,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657052510] [2021-01-07 05:09:20,457 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:20,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-07 05:09:20,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:20,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-07 05:09:20,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-07 05:09:21,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:21,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-01-07 05:09:21,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391628941] [2021-01-07 05:09:21,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:09:21,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:09:21,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:09:21,080 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 25 states. [2021-01-07 05:09:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:21,264 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2021-01-07 05:09:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-07 05:09:21,265 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2021-01-07 05:09:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:21,265 INFO L225 Difference]: With dead ends: 95 [2021-01-07 05:09:21,265 INFO L226 Difference]: Without dead ends: 95 [2021-01-07 05:09:21,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=392, Unknown=0, NotChecked=0, Total=650 [2021-01-07 05:09:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-07 05:09:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-01-07 05:09:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-07 05:09:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-01-07 05:09:21,270 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 73 [2021-01-07 05:09:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:21,270 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-01-07 05:09:21,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:09:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-01-07 05:09:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-07 05:09:21,272 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:21,272 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:21,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-07 05:09:21,486 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1856483815, now seen corresponding path program 4 times [2021-01-07 05:09:21,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:21,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288444900] [2021-01-07 05:09:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-07 05:09:21,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288444900] [2021-01-07 05:09:21,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685555880] [2021-01-07 05:09:21,665 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:22,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:09:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:22,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:09:22,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-07 05:09:22,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:22,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-01-07 05:09:22,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230124760] [2021-01-07 05:09:22,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-07 05:09:22,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:22,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-07 05:09:22,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-01-07 05:09:22,961 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 27 states. [2021-01-07 05:09:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:23,150 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-01-07 05:09:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-07 05:09:23,150 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2021-01-07 05:09:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:23,151 INFO L225 Difference]: With dead ends: 101 [2021-01-07 05:09:23,151 INFO L226 Difference]: Without dead ends: 101 [2021-01-07 05:09:23,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=299, Invalid=457, Unknown=0, NotChecked=0, Total=756 [2021-01-07 05:09:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-07 05:09:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-01-07 05:09:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-07 05:09:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-01-07 05:09:23,155 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 79 [2021-01-07 05:09:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:23,155 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-01-07 05:09:23,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-07 05:09:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-01-07 05:09:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-07 05:09:23,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:23,157 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:23,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-07 05:09:23,372 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1370997844, now seen corresponding path program 5 times [2021-01-07 05:09:23,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:23,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757191938] [2021-01-07 05:09:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-07 05:09:23,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757191938] [2021-01-07 05:09:23,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956971813] [2021-01-07 05:09:23,582 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:27,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-07 05:09:27,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:27,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:09:27,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-07 05:09:27,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:27,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-07 05:09:27,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625557927] [2021-01-07 05:09:27,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-07 05:09:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-07 05:09:27,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:09:27,308 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 16 states. [2021-01-07 05:09:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:27,458 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-01-07 05:09:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-07 05:09:27,459 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2021-01-07 05:09:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:27,460 INFO L225 Difference]: With dead ends: 108 [2021-01-07 05:09:27,460 INFO L226 Difference]: Without dead ends: 108 [2021-01-07 05:09:27,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:09:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-07 05:09:27,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-01-07 05:09:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-07 05:09:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-01-07 05:09:27,463 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 85 [2021-01-07 05:09:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:27,463 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-01-07 05:09:27,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-07 05:09:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-01-07 05:09:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-07 05:09:27,464 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:27,465 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:27,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:27,680 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1875567827, now seen corresponding path program 6 times [2021-01-07 05:09:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:27,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980517187] [2021-01-07 05:09:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-07 05:09:27,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980517187] [2021-01-07 05:09:27,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053791062] [2021-01-07 05:09:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:29,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-01-07 05:09:29,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-07 05:09:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:29,189 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:29,189 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 1 case distinctions, treesize of input 13 treesize of output 15 [2021-01-07 05:09:29,192 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:29,198 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:29,199 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:09:29,200 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2021-01-07 05:09:29,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-01-07 05:09:29,278 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:29,283 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:29,283 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:09:29,283 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-01-07 05:09:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-07 05:09:29,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:29,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 34 [2021-01-07 05:09:29,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748123557] [2021-01-07 05:09:29,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-07 05:09:29,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:29,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-07 05:09:29,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=756, Unknown=0, NotChecked=0, Total=1122 [2021-01-07 05:09:29,838 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 34 states. [2021-01-07 05:09:30,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:30,964 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2021-01-07 05:09:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-07 05:09:30,964 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 88 [2021-01-07 05:09:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:30,966 INFO L225 Difference]: With dead ends: 134 [2021-01-07 05:09:30,966 INFO L226 Difference]: Without dead ends: 134 [2021-01-07 05:09:30,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=811, Invalid=1739, Unknown=0, NotChecked=0, Total=2550 [2021-01-07 05:09:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-07 05:09:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2021-01-07 05:09:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-07 05:09:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-01-07 05:09:30,969 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 88 [2021-01-07 05:09:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:30,970 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-01-07 05:09:30,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-07 05:09:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-01-07 05:09:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-07 05:09:30,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:30,971 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:31,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:31,185 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash -435222092, now seen corresponding path program 7 times [2021-01-07 05:09:31,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:31,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522796871] [2021-01-07 05:09:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-07 05:09:31,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522796871] [2021-01-07 05:09:31,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592756651] [2021-01-07 05:09:31,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:31,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-07 05:09:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-07 05:09:31,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:31,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-01-07 05:09:31,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475591569] [2021-01-07 05:09:31,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-07 05:09:31,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-07 05:09:31,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=649, Unknown=0, NotChecked=0, Total=1056 [2021-01-07 05:09:31,884 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 33 states. [2021-01-07 05:09:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:32,185 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2021-01-07 05:09:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-07 05:09:32,185 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2021-01-07 05:09:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:32,186 INFO L225 Difference]: With dead ends: 119 [2021-01-07 05:09:32,186 INFO L226 Difference]: Without dead ends: 119 [2021-01-07 05:09:32,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=440, Invalid=682, Unknown=0, NotChecked=0, Total=1122 [2021-01-07 05:09:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-07 05:09:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-01-07 05:09:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-07 05:09:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-01-07 05:09:32,190 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 97 [2021-01-07 05:09:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:32,190 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-01-07 05:09:32,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-07 05:09:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-01-07 05:09:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-07 05:09:32,192 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:32,192 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:32,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:32,407 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:32,408 INFO L82 PathProgramCache]: Analyzing trace with hash -94121639, now seen corresponding path program 8 times [2021-01-07 05:09:32,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:32,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714408924] [2021-01-07 05:09:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-07 05:09:32,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714408924] [2021-01-07 05:09:32,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701118845] [2021-01-07 05:09:32,632 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:32,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:09:32,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:32,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-07 05:09:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-07 05:09:33,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:33,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-01-07 05:09:33,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664559905] [2021-01-07 05:09:33,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-07 05:09:33,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:33,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-07 05:09:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=732, Unknown=0, NotChecked=0, Total=1190 [2021-01-07 05:09:33,166 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 35 states. [2021-01-07 05:09:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:33,476 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2021-01-07 05:09:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-07 05:09:33,480 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2021-01-07 05:09:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:33,481 INFO L225 Difference]: With dead ends: 125 [2021-01-07 05:09:33,482 INFO L226 Difference]: Without dead ends: 125 [2021-01-07 05:09:33,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=493, Invalid=767, Unknown=0, NotChecked=0, Total=1260 [2021-01-07 05:09:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-07 05:09:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2021-01-07 05:09:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-07 05:09:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-01-07 05:09:33,485 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 103 [2021-01-07 05:09:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:33,486 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-01-07 05:09:33,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-07 05:09:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-01-07 05:09:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-07 05:09:33,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:33,487 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:33,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-07 05:09:33,702 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:33,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1622419220, now seen corresponding path program 9 times [2021-01-07 05:09:33,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:33,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159080276] [2021-01-07 05:09:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-07 05:09:33,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159080276] [2021-01-07 05:09:33,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404751982] [2021-01-07 05:09:33,981 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:36,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-01-07 05:09:36,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:36,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-07 05:09:36,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-07 05:09:36,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:36,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-01-07 05:09:36,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851880288] [2021-01-07 05:09:36,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-07 05:09:36,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:36,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-07 05:09:36,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2021-01-07 05:09:36,833 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 37 states. [2021-01-07 05:09:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:37,149 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2021-01-07 05:09:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-07 05:09:37,150 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2021-01-07 05:09:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:37,151 INFO L225 Difference]: With dead ends: 131 [2021-01-07 05:09:37,151 INFO L226 Difference]: Without dead ends: 131 [2021-01-07 05:09:37,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=857, Unknown=0, NotChecked=0, Total=1406 [2021-01-07 05:09:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-07 05:09:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-01-07 05:09:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-07 05:09:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-01-07 05:09:37,155 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 109 [2021-01-07 05:09:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:37,155 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-01-07 05:09:37,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-07 05:09:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-01-07 05:09:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-07 05:09:37,156 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:37,156 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:37,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-07 05:09:37,372 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 722833145, now seen corresponding path program 10 times [2021-01-07 05:09:37,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:37,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375372610] [2021-01-07 05:09:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-07 05:09:37,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375372610] [2021-01-07 05:09:37,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033655726] [2021-01-07 05:09:37,645 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:48,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:09:48,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-07 05:09:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-07 05:09:48,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:48,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-01-07 05:09:48,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973608437] [2021-01-07 05:09:48,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-07 05:09:48,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-07 05:09:48,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=913, Unknown=0, NotChecked=0, Total=1482 [2021-01-07 05:09:48,649 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 39 states. [2021-01-07 05:09:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:48,984 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2021-01-07 05:09:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-07 05:09:48,984 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2021-01-07 05:09:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:48,987 INFO L225 Difference]: With dead ends: 137 [2021-01-07 05:09:48,987 INFO L226 Difference]: Without dead ends: 137 [2021-01-07 05:09:48,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=608, Invalid=952, Unknown=0, NotChecked=0, Total=1560 [2021-01-07 05:09:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-07 05:09:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-01-07 05:09:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-07 05:09:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-01-07 05:09:48,997 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 115 [2021-01-07 05:09:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:48,997 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-01-07 05:09:48,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-07 05:09:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-01-07 05:09:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-07 05:09:48,999 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:48,999 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:49,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-07 05:09:49,200 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:49,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1848304524, now seen corresponding path program 11 times [2021-01-07 05:09:49,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:49,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302399420] [2021-01-07 05:09:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-07 05:09:49,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302399420] [2021-01-07 05:09:49,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988430855] [2021-01-07 05:09:49,546 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:10:50,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-07 05:10:50,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:10:50,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-07 05:10:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:10:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-07 05:10:50,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:10:50,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-07 05:10:50,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914170403] [2021-01-07 05:10:50,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-07 05:10:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:10:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-07 05:10:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-07 05:10:50,864 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 22 states. [2021-01-07 05:10:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:10:51,125 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2021-01-07 05:10:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-07 05:10:51,126 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2021-01-07 05:10:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:10:51,128 INFO L225 Difference]: With dead ends: 144 [2021-01-07 05:10:51,129 INFO L226 Difference]: Without dead ends: 144 [2021-01-07 05:10:51,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-07 05:10:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-07 05:10:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2021-01-07 05:10:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-07 05:10:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-01-07 05:10:51,137 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 121 [2021-01-07 05:10:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:10:51,138 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-01-07 05:10:51,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-07 05:10:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-01-07 05:10:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-07 05:10:51,139 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:10:51,139 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:10:51,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-07 05:10:51,340 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:10:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:10:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2036524877, now seen corresponding path program 12 times [2021-01-07 05:10:51,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:10:51,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410642283] [2021-01-07 05:10:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:10:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:10:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-07 05:10:51,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410642283] [2021-01-07 05:10:51,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974403933] [2021-01-07 05:10:51,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:11:01,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-01-07 05:11:01,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:11:01,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-07 05:11:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:11:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-07 05:11:01,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:11:01,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-07 05:11:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586402798] [2021-01-07 05:11:01,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-07 05:11:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:11:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-07 05:11:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-07 05:11:01,968 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 23 states. [2021-01-07 05:11:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:11:02,221 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2021-01-07 05:11:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-07 05:11:02,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2021-01-07 05:11:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:11:02,224 INFO L225 Difference]: With dead ends: 151 [2021-01-07 05:11:02,224 INFO L226 Difference]: Without dead ends: 151 [2021-01-07 05:11:02,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-07 05:11:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-07 05:11:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-01-07 05:11:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-07 05:11:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-01-07 05:11:02,230 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 124 [2021-01-07 05:11:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:11:02,231 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-01-07 05:11:02,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-07 05:11:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-01-07 05:11:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-07 05:11:02,232 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:11:02,232 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:11:02,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-07 05:11:02,446 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:11:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:11:02,447 INFO L82 PathProgramCache]: Analyzing trace with hash -81772524, now seen corresponding path program 13 times [2021-01-07 05:11:02,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:11:02,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163995643] [2021-01-07 05:11:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:11:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:11:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-07 05:11:02,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163995643] [2021-01-07 05:11:02,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718644118] [2021-01-07 05:11:02,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:11:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:11:02,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-07 05:11:02,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:11:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-07 05:11:03,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:11:03,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2021-01-07 05:11:03,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590100504] [2021-01-07 05:11:03,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-07 05:11:03,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:11:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-07 05:11:03,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2021-01-07 05:11:03,463 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 43 states. [2021-01-07 05:11:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:11:03,978 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2021-01-07 05:11:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-07 05:11:03,982 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2021-01-07 05:11:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:11:03,983 INFO L225 Difference]: With dead ends: 155 [2021-01-07 05:11:03,983 INFO L226 Difference]: Without dead ends: 155 [2021-01-07 05:11:03,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=803, Invalid=1267, Unknown=0, NotChecked=0, Total=2070 [2021-01-07 05:11:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-07 05:11:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-01-07 05:11:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-07 05:11:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-01-07 05:11:03,989 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 127 [2021-01-07 05:11:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:11:03,989 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-01-07 05:11:03,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-07 05:11:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-01-07 05:11:03,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-07 05:11:03,990 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:11:03,990 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:11:04,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:11:04,202 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:11:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:11:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash 216728121, now seen corresponding path program 14 times [2021-01-07 05:11:04,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:11:04,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536674327] [2021-01-07 05:11:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:11:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:11:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-01-07 05:11:04,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536674327] [2021-01-07 05:11:04,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330042662] [2021-01-07 05:11:04,602 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:11:04,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:11:04,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:11:04,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-07 05:11:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:11:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-01-07 05:11:05,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:11:05,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-01-07 05:11:05,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177223781] [2021-01-07 05:11:05,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-07 05:11:05,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:11:05,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-07 05:11:05,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=1335, Unknown=0, NotChecked=0, Total=2162 [2021-01-07 05:11:05,350 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 47 states. [2021-01-07 05:11:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:11:05,731 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2021-01-07 05:11:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-07 05:11:05,732 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2021-01-07 05:11:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:11:05,733 INFO L225 Difference]: With dead ends: 161 [2021-01-07 05:11:05,733 INFO L226 Difference]: Without dead ends: 161 [2021-01-07 05:11:05,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=874, Invalid=1382, Unknown=0, NotChecked=0, Total=2256 [2021-01-07 05:11:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-07 05:11:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2021-01-07 05:11:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-07 05:11:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-01-07 05:11:05,738 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 139 [2021-01-07 05:11:05,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:11:05,738 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-01-07 05:11:05,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-07 05:11:05,738 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-01-07 05:11:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-07 05:11:05,739 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:11:05,739 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:11:05,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-07 05:11:05,953 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:11:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:11:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1807912756, now seen corresponding path program 15 times [2021-01-07 05:11:05,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:11:05,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364467284] [2021-01-07 05:11:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:11:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:11:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-01-07 05:11:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364467284] [2021-01-07 05:11:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252933314] [2021-01-07 05:11:06,418 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:11:28,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-01-07 05:11:28,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:11:28,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-07 05:11:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:11:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-01-07 05:11:29,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:11:29,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-01-07 05:11:29,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983051425] [2021-01-07 05:11:29,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-07 05:11:29,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:11:29,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-07 05:11:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=1453, Unknown=0, NotChecked=0, Total=2352 [2021-01-07 05:11:29,639 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 49 states. [2021-01-07 05:11:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:11:30,062 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2021-01-07 05:11:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-07 05:11:30,062 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2021-01-07 05:11:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:11:30,064 INFO L225 Difference]: With dead ends: 167 [2021-01-07 05:11:30,064 INFO L226 Difference]: Without dead ends: 167 [2021-01-07 05:11:30,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=948, Invalid=1502, Unknown=0, NotChecked=0, Total=2450 [2021-01-07 05:11:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-07 05:11:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2021-01-07 05:11:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-07 05:11:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-01-07 05:11:30,071 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 145 [2021-01-07 05:11:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:11:30,071 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-01-07 05:11:30,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-07 05:11:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-01-07 05:11:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-07 05:11:30,072 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:11:30,072 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:11:30,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-07 05:11:30,284 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:11:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:11:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1624066087, now seen corresponding path program 16 times [2021-01-07 05:11:30,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:11:30,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353798206] [2021-01-07 05:11:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:11:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:11:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-01-07 05:11:30,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353798206] [2021-01-07 05:11:30,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135784723] [2021-01-07 05:11:30,733 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:12:47,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:12:47,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:12:48,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-07 05:12:48,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:12:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-01-07 05:12:48,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:12:48,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-01-07 05:12:48,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385368636] [2021-01-07 05:12:48,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-07 05:12:48,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:12:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-07 05:12:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1576, Unknown=0, NotChecked=0, Total=2550 [2021-01-07 05:12:48,742 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 51 states. [2021-01-07 05:12:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:12:49,156 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2021-01-07 05:12:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-07 05:12:49,161 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2021-01-07 05:12:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:12:49,162 INFO L225 Difference]: With dead ends: 173 [2021-01-07 05:12:49,163 INFO L226 Difference]: Without dead ends: 173 [2021-01-07 05:12:49,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1025, Invalid=1627, Unknown=0, NotChecked=0, Total=2652 [2021-01-07 05:12:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-07 05:12:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2021-01-07 05:12:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-07 05:12:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-01-07 05:12:49,168 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 151 [2021-01-07 05:12:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:12:49,168 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-01-07 05:12:49,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-07 05:12:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-01-07 05:12:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-07 05:12:49,169 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:12:49,169 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:12:49,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:12:49,370 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:12:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:12:49,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1751846036, now seen corresponding path program 17 times [2021-01-07 05:12:49,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:12:49,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804671098] [2021-01-07 05:12:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:12:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:12:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-07 05:12:49,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804671098] [2021-01-07 05:12:49,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104642211] [2021-01-07 05:12:49,904 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true