/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/960521-1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:09:05,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:09:05,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:09:05,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:09:05,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:09:05,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:09:05,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:09:05,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:09:06,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:09:06,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:09:06,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:09:06,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:09:06,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:09:06,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:09:06,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:09:06,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:09:06,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:09:06,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:09:06,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:09:06,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:09:06,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:09:06,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:09:06,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:09:06,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:09:06,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-07 05:09:06,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-07 05:09:06,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-07 05:09:06,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-07 05:09:06,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-07 05:09:06,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-07 05:09:06,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:09:06,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:09:06,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:09:06,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:09:06,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:09:06,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:09:06,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:09:06,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:09:06,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:09:06,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:09:06,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:09:06,096 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 05:09:06,150 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:09:06,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:09:06,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:09:06,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:09:06,155 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:09:06,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:09:06,156 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:09:06,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:09:06,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:09:06,156 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:09:06,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:09:06,158 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:09:06,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:09:06,158 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:09:06,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:09:06,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:09:06,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:09:06,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:09:06,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:09:06,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:09:06,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:09:06,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:09:06,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:09:06,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:09:06,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:09:06,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:09:06,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:09:06,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:09:06,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:09:06,631 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:09:06,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-1.i [2021-01-07 05:09:06,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf3b28899/abfb36f4cb3242a5bbab84bf04a109b6/FLAG574a8743b [2021-01-07 05:09:07,352 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:09:07,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-1.i [2021-01-07 05:09:07,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf3b28899/abfb36f4cb3242a5bbab84bf04a109b6/FLAG574a8743b [2021-01-07 05:09:07,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf3b28899/abfb36f4cb3242a5bbab84bf04a109b6 [2021-01-07 05:09:07,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:09:07,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:09:07,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:09:07,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:09:07,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:09:07,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:09:07" (1/1) ... [2021-01-07 05:09:07,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de7e78b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:07, skipping insertion in model container [2021-01-07 05:09:07,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:09:07" (1/1) ... [2021-01-07 05:09:07,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:09:07,764 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 05:09:08,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:09:08,181 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 05:09:08,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:09:08,327 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:09:08,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08 WrapperNode [2021-01-07 05:09:08,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:09:08,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:09:08,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:09:08,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:09:08,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:09:08,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:09:08,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:09:08,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:09:08,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (1/1) ... [2021-01-07 05:09:08,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:09:08,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:09:08,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:09:08,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:09:08,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (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 05:09:08,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:09:08,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:09:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-07 05:09:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:09:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:09:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-07 05:09:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:09:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:09:09,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:09:09,072 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-07 05:09:09,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:09 BoogieIcfgContainer [2021-01-07 05:09:09,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:09:09,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:09:09,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:09:09,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:09:09,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:09:07" (1/3) ... [2021-01-07 05:09:09,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bab3ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:09:09, skipping insertion in model container [2021-01-07 05:09:09,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:08" (2/3) ... [2021-01-07 05:09:09,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bab3ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:09:09, skipping insertion in model container [2021-01-07 05:09:09,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:09" (3/3) ... [2021-01-07 05:09:09,085 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-1.i [2021-01-07 05:09:09,092 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:09:09,099 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2021-01-07 05:09:09,122 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-01-07 05:09:09,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:09:09,149 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:09:09,149 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:09:09,149 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:09:09,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:09:09,150 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:09:09,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:09:09,150 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:09:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2021-01-07 05:09:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-01-07 05:09:09,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:09,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-01-07 05:09:09,180 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 05:09:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:09,187 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-01-07 05:09:09,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:09,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747639372] [2021-01-07 05:09:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:09,401 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 05:09:09,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747639372] [2021-01-07 05:09:09,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:09,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:09,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918334998] [2021-01-07 05:09:09,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:09,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:09,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:09,429 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2021-01-07 05:09:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:09,517 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-07 05:09:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:09,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-01-07 05:09:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:09,529 INFO L225 Difference]: With dead ends: 49 [2021-01-07 05:09:09,529 INFO L226 Difference]: Without dead ends: 47 [2021-01-07 05:09:09,531 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 05:09:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-07 05:09:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-07 05:09:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-07 05:09:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-01-07 05:09:09,571 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2021-01-07 05:09:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:09,571 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-01-07 05:09:09,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-01-07 05:09:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-01-07 05:09:09,572 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:09,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-01-07 05:09:09,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:09:09,573 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 05:09:09,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:09,574 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-01-07 05:09:09,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:09,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828399255] [2021-01-07 05:09:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:09,636 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 05:09:09,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828399255] [2021-01-07 05:09:09,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:09,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:09,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726549034] [2021-01-07 05:09:09,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:09,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:09,641 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 3 states. [2021-01-07 05:09:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:09,666 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-01-07 05:09:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:09,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-01-07 05:09:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:09,668 INFO L225 Difference]: With dead ends: 46 [2021-01-07 05:09:09,668 INFO L226 Difference]: Without dead ends: 46 [2021-01-07 05:09:09,669 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 05:09:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-07 05:09:09,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-07 05:09:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-07 05:09:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-07 05:09:09,676 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 3 [2021-01-07 05:09:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:09,676 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-07 05:09:09,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-07 05:09:09,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:09:09,677 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:09,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:09:09,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:09:09,678 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 05:09:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2021-01-07 05:09:09,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:09,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323384] [2021-01-07 05:09:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:09,800 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 05:09:09,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323384] [2021-01-07 05:09:09,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:09,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:09:09,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841285570] [2021-01-07 05:09:09,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:09:09,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:09:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:09:09,805 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2021-01-07 05:09:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:09,884 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-01-07 05:09:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:09,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:09:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:09,886 INFO L225 Difference]: With dead ends: 43 [2021-01-07 05:09:09,886 INFO L226 Difference]: Without dead ends: 43 [2021-01-07 05:09:09,887 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 05:09:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-07 05:09:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-07 05:09:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-07 05:09:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-01-07 05:09:09,903 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2021-01-07 05:09:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:09,904 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-01-07 05:09:09,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:09:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-01-07 05:09:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:09:09,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:09,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:09:09,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:09:09,908 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 05:09:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:09,909 INFO L82 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-01-07 05:09:09,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:09,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017178341] [2021-01-07 05:09:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:10,091 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 05:09:10,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017178341] [2021-01-07 05:09:10,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:10,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:09:10,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071969506] [2021-01-07 05:09:10,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:09:10,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:10,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:09:10,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:09:10,103 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2021-01-07 05:09:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:10,231 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-07 05:09:10,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:09:10,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-01-07 05:09:10,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:10,233 INFO L225 Difference]: With dead ends: 49 [2021-01-07 05:09:10,233 INFO L226 Difference]: Without dead ends: 49 [2021-01-07 05:09:10,234 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 05:09:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-07 05:09:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-01-07 05:09:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-07 05:09:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-07 05:09:10,241 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2021-01-07 05:09:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:10,241 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-07 05:09:10,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:09:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-07 05:09:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:09:10,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:10,242 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:10,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:09:10,243 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 05:09:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:10,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2021-01-07 05:09:10,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:10,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051767087] [2021-01-07 05:09:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:10,360 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 05:09:10,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051767087] [2021-01-07 05:09:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140139115] [2021-01-07 05:09:10,363 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 05:09:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-07 05:09:10,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:10,587 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:10,587 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 05:09:10,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:10,600 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:10,612 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 05:09:10,613 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2021-01-07 05:09:10,707 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 05:09:10,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:10,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-01-07 05:09:10,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809936287] [2021-01-07 05:09:10,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-07 05:09:10,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:10,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-07 05:09:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:09:10,710 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 9 states. [2021-01-07 05:09:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:10,934 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-01-07 05:09:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:09:10,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-01-07 05:09:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:10,937 INFO L225 Difference]: With dead ends: 57 [2021-01-07 05:09:10,937 INFO L226 Difference]: Without dead ends: 57 [2021-01-07 05:09:10,938 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 05:09:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-07 05:09:10,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-01-07 05:09:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-07 05:09:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-01-07 05:09:10,953 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 9 [2021-01-07 05:09:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:10,953 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-01-07 05:09:10,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-07 05:09:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-01-07 05:09:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-07 05:09:10,954 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:10,954 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2021-01-07 05:09:11,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:11,157 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 05:09:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:11,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1472839145, now seen corresponding path program 2 times [2021-01-07 05:09:11,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:11,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129705432] [2021-01-07 05:09:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,386 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 05:09:11,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129705432] [2021-01-07 05:09:11,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843717604] [2021-01-07 05:09:11,387 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 05:09:11,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:09:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:09:11,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:11,497 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:11,498 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 05:09:11,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:11,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:11,511 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 05:09:11,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2021-01-07 05:09:11,657 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 05:09:11,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:11,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-07 05:09:11,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559878391] [2021-01-07 05:09:11,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-07 05:09:11,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-07 05:09:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:09:11,666 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2021-01-07 05:09:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:11,993 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2021-01-07 05:09:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:09:11,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2021-01-07 05:09:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:11,995 INFO L225 Difference]: With dead ends: 120 [2021-01-07 05:09:11,996 INFO L226 Difference]: Without dead ends: 120 [2021-01-07 05:09:11,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-01-07 05:09:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-07 05:09:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 54. [2021-01-07 05:09:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-07 05:09:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-01-07 05:09:12,003 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2021-01-07 05:09:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:12,003 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-01-07 05:09:12,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-07 05:09:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-01-07 05:09:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-07 05:09:12,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:12,004 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:12,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:12,218 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 05:09:12,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:12,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2021-01-07 05:09:12,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:12,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708977530] [2021-01-07 05:09:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:12,322 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 05:09:12,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708977530] [2021-01-07 05:09:12,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:12,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:09:12,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734771227] [2021-01-07 05:09:12,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:09:12,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:09:12,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:09:12,327 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2021-01-07 05:09:12,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:12,385 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-01-07 05:09:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:09:12,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-01-07 05:09:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:12,387 INFO L225 Difference]: With dead ends: 52 [2021-01-07 05:09:12,388 INFO L226 Difference]: Without dead ends: 52 [2021-01-07 05:09:12,389 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 05:09:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-07 05:09:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-07 05:09:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-07 05:09:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-01-07 05:09:12,394 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 20 [2021-01-07 05:09:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:12,394 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-01-07 05:09:12,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:09:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-01-07 05:09:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-07 05:09:12,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:12,395 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:12,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-07 05:09:12,396 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 05:09:12,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:12,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2021-01-07 05:09:12,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:12,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107743226] [2021-01-07 05:09:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:12,484 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 05:09:12,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107743226] [2021-01-07 05:09:12,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386830837] [2021-01-07 05:09:12,485 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 05:09:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:12,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-07 05:09:12,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:12,661 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 05:09:12,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:12,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-07 05:09:12,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107970463] [2021-01-07 05:09:12,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-07 05:09:12,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:12,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-07 05:09:12,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:09:12,665 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 13 states. [2021-01-07 05:09:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:12,787 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-01-07 05:09:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:09:12,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2021-01-07 05:09:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:12,789 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:09:12,789 INFO L226 Difference]: Without dead ends: 73 [2021-01-07 05:09:12,790 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 05:09:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-07 05:09:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-01-07 05:09:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-07 05:09:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-01-07 05:09:12,795 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 20 [2021-01-07 05:09:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:12,796 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-01-07 05:09:12,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-07 05:09:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-01-07 05:09:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-07 05:09:12,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:12,797 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:13,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:13,009 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 05:09:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash 116531578, now seen corresponding path program 2 times [2021-01-07 05:09:13,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:13,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948728185] [2021-01-07 05:09:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,143 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 05:09:13,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948728185] [2021-01-07 05:09:13,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021394476] [2021-01-07 05:09:13,144 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 05:09:13,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-07 05:09:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:13,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:09:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:13,241 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:13,241 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 05:09:13,243 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:13,255 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:13,260 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 05:09:13,261 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2021-01-07 05:09:13,400 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 05:09:13,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:09:13,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2021-01-07 05:09:13,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267707862] [2021-01-07 05:09:13,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:09:13,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:09:13,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:09:13,403 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 5 states. [2021-01-07 05:09:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:13,491 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-01-07 05:09:13,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:09:13,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-01-07 05:09:13,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:13,494 INFO L225 Difference]: With dead ends: 52 [2021-01-07 05:09:13,494 INFO L226 Difference]: Without dead ends: 52 [2021-01-07 05:09:13,494 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 05:09:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-07 05:09:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-07 05:09:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-07 05:09:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-01-07 05:09:13,499 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 23 [2021-01-07 05:09:13,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:13,500 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-01-07 05:09:13,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:09:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-01-07 05:09:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-07 05:09:13,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:13,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:13,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:13,716 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 05:09:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1258641039, now seen corresponding path program 1 times [2021-01-07 05:09:13,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:13,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993020637] [2021-01-07 05:09:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,831 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 05:09:13,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993020637] [2021-01-07 05:09:13,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630041924] [2021-01-07 05:09:13,832 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 05:09:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-07 05:09:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:14,046 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 05:09:14,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:14,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-07 05:09:14,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947400754] [2021-01-07 05:09:14,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-07 05:09:14,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-07 05:09:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-07 05:09:14,049 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 15 states. [2021-01-07 05:09:14,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:14,189 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-01-07 05:09:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:09:14,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2021-01-07 05:09:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:14,190 INFO L225 Difference]: With dead ends: 67 [2021-01-07 05:09:14,191 INFO L226 Difference]: Without dead ends: 67 [2021-01-07 05:09:14,191 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 05:09:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-07 05:09:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2021-01-07 05:09:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-07 05:09:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-01-07 05:09:14,195 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 26 [2021-01-07 05:09:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:14,196 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-01-07 05:09:14,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-07 05:09:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-01-07 05:09:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-07 05:09:14,197 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:14,197 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:14,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-07 05:09:14,411 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 05:09:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 2 times [2021-01-07 05:09:14,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:14,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255623453] [2021-01-07 05:09:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:14,538 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 05:09:14,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255623453] [2021-01-07 05:09:14,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182125067] [2021-01-07 05:09:14,538 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 05:09:14,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:09:14,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:14,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-07 05:09:14,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:14,749 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 05:09:14,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:14,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-07 05:09:14,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273915497] [2021-01-07 05:09:14,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-07 05:09:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-07 05:09:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:09:14,752 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 17 states. [2021-01-07 05:09:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:14,896 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-01-07 05:09:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:09:14,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2021-01-07 05:09:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:14,898 INFO L225 Difference]: With dead ends: 74 [2021-01-07 05:09:14,898 INFO L226 Difference]: Without dead ends: 74 [2021-01-07 05:09:14,898 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 05:09:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-07 05:09:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-01-07 05:09:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-07 05:09:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-01-07 05:09:14,902 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 29 [2021-01-07 05:09:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:14,903 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-01-07 05:09:14,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-07 05:09:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-01-07 05:09:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-07 05:09:14,904 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:14,904 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:15,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:15,118 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 05:09:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:15,119 INFO L82 PathProgramCache]: Analyzing trace with hash 611161295, now seen corresponding path program 3 times [2021-01-07 05:09:15,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:15,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889595886] [2021-01-07 05:09:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:15,265 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 05:09:15,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889595886] [2021-01-07 05:09:15,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068514300] [2021-01-07 05:09:15,266 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 05:09:15,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-07 05:09:15,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-07 05:09:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:15,362 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:09:15,363 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 05:09:15,364 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:15,376 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:15,382 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 05:09:15,383 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2021-01-07 05:09:15,621 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 05:09:15,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:09:15,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2021-01-07 05:09:15,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720355759] [2021-01-07 05:09:15,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-07 05:09:15,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:15,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-07 05:09:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:09:15,624 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 7 states. [2021-01-07 05:09:15,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:15,727 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-01-07 05:09:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:09:15,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2021-01-07 05:09:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:15,729 INFO L225 Difference]: With dead ends: 63 [2021-01-07 05:09:15,729 INFO L226 Difference]: Without dead ends: 63 [2021-01-07 05:09:15,729 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 05:09:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-07 05:09:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-07 05:09:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-07 05:09:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-01-07 05:09:15,733 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 32 [2021-01-07 05:09:15,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:15,733 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-01-07 05:09:15,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-07 05:09:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-01-07 05:09:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-07 05:09:15,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:15,735 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 05:09:15,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:15,950 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 05:09:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:15,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1172416315, now seen corresponding path program 1 times [2021-01-07 05:09:15,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:15,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379199683] [2021-01-07 05:09:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:16,057 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 05:09:16,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379199683] [2021-01-07 05:09:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444482878] [2021-01-07 05:09:16,058 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 05:09:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:16,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-07 05:09:16,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:16,341 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 05:09:16,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:16,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-01-07 05:09:16,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655264815] [2021-01-07 05:09:16,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-07 05:09:16,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:16,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-07 05:09:16,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-01-07 05:09:16,349 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 19 states. [2021-01-07 05:09:16,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:16,486 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-07 05:09:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-07 05:09:16,487 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2021-01-07 05:09:16,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:16,488 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:09:16,488 INFO L226 Difference]: Without dead ends: 73 [2021-01-07 05:09:16,490 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 05:09:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-07 05:09:16,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2021-01-07 05:09:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-07 05:09:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-07 05:09:16,501 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 53 [2021-01-07 05:09:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:16,501 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-07 05:09:16,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-07 05:09:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-07 05:09:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-07 05:09:16,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:16,508 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 05:09:16,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-07 05:09:16,722 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 05:09:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1736039872, now seen corresponding path program 2 times [2021-01-07 05:09:16,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:16,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134950609] [2021-01-07 05:09:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:16,907 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 05:09:16,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134950609] [2021-01-07 05:09:16,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175280505] [2021-01-07 05:09:16,908 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 05:09:16,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-07 05:09:16,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-07 05:09:16,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:17,026 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 05:09:17,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:09:17,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 13 [2021-01-07 05:09:17,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818343380] [2021-01-07 05:09:17,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:17,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:09:17,028 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 3 states. [2021-01-07 05:09:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:17,041 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-01-07 05:09:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:17,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2021-01-07 05:09:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:17,042 INFO L225 Difference]: With dead ends: 67 [2021-01-07 05:09:17,043 INFO L226 Difference]: Without dead ends: 67 [2021-01-07 05:09:17,043 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 05:09:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-07 05:09:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-01-07 05:09:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-07 05:09:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-01-07 05:09:17,046 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2021-01-07 05:09:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:17,046 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-01-07 05:09:17,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-01-07 05:09:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-07 05:09:17,047 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:17,048 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 05:09:17,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:17,262 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 05:09:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1887003102, now seen corresponding path program 1 times [2021-01-07 05:09:17,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:17,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021198186] [2021-01-07 05:09:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:17,393 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 05:09:17,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021198186] [2021-01-07 05:09:17,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534933915] [2021-01-07 05:09:17,394 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 05:09:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:17,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-07 05:09:17,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:17,666 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 05:09:17,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:17,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-07 05:09:17,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258815782] [2021-01-07 05:09:17,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-07 05:09:17,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:17,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-07 05:09:17,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-07 05:09:17,669 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 21 states. [2021-01-07 05:09:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:17,848 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-01-07 05:09:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-07 05:09:17,848 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2021-01-07 05:09:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:17,849 INFO L225 Difference]: With dead ends: 77 [2021-01-07 05:09:17,849 INFO L226 Difference]: Without dead ends: 77 [2021-01-07 05:09:17,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-07 05:09:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-07 05:09:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2021-01-07 05:09:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-07 05:09:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-01-07 05:09:17,858 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 61 [2021-01-07 05:09:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:17,859 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-01-07 05:09:17,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-07 05:09:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-01-07 05:09:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-07 05:09:17,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:17,861 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 05:09:18,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-07 05:09:18,077 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 05:09:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1202087175, now seen corresponding path program 2 times [2021-01-07 05:09:18,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:18,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403560880] [2021-01-07 05:09:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:18,206 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 05:09:18,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403560880] [2021-01-07 05:09:18,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938599869] [2021-01-07 05:09:18,206 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 05:09:18,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:09:18,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:18,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-07 05:09:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:18,517 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 05:09:18,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:18,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-01-07 05:09:18,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448091966] [2021-01-07 05:09:18,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-07 05:09:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-07 05:09:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-01-07 05:09:18,520 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2021-01-07 05:09:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:18,714 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-01-07 05:09:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-07 05:09:18,714 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2021-01-07 05:09:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:18,715 INFO L225 Difference]: With dead ends: 83 [2021-01-07 05:09:18,715 INFO L226 Difference]: Without dead ends: 83 [2021-01-07 05:09:18,716 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 05:09:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-07 05:09:18,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2021-01-07 05:09:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-07 05:09:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-01-07 05:09:18,719 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 67 [2021-01-07 05:09:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:18,719 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-01-07 05:09:18,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-07 05:09:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-01-07 05:09:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-07 05:09:18,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:18,720 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 05:09:18,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-07 05:09:18,934 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 05:09:18,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:18,935 INFO L82 PathProgramCache]: Analyzing trace with hash 835466114, now seen corresponding path program 3 times [2021-01-07 05:09:18,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:18,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172455459] [2021-01-07 05:09:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:19,071 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 05:09:19,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172455459] [2021-01-07 05:09:19,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403718222] [2021-01-07 05:09:19,072 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 05:09:19,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-07 05:09:19,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-07 05:09:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:19,605 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 05:09:19,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:19,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-01-07 05:09:19,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837874740] [2021-01-07 05:09:19,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:09:19,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:19,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:09:19,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:09:19,607 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 25 states. [2021-01-07 05:09:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:19,818 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-01-07 05:09:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-07 05:09:19,820 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2021-01-07 05:09:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:19,821 INFO L225 Difference]: With dead ends: 89 [2021-01-07 05:09:19,821 INFO L226 Difference]: Without dead ends: 89 [2021-01-07 05:09:19,822 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 05:09:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-07 05:09:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-01-07 05:09:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-07 05:09:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-01-07 05:09:19,825 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 73 [2021-01-07 05:09:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:19,826 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-01-07 05:09:19,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:09:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-01-07 05:09:19,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-07 05:09:19,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:19,827 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 05:09:20,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-07 05:09:20,042 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 05:09:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:20,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1843123545, now seen corresponding path program 4 times [2021-01-07 05:09:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:20,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426395438] [2021-01-07 05:09:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:20,244 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 05:09:20,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426395438] [2021-01-07 05:09:20,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163780779] [2021-01-07 05:09:20,245 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 05:09:20,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:09:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:09:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:21,182 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 05:09:21,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:21,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-01-07 05:09:21,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459091873] [2021-01-07 05:09:21,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-07 05:09:21,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:21,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-07 05:09:21,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-01-07 05:09:21,185 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 27 states. [2021-01-07 05:09:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:21,397 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2021-01-07 05:09:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-07 05:09:21,400 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2021-01-07 05:09:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:21,401 INFO L225 Difference]: With dead ends: 95 [2021-01-07 05:09:21,402 INFO L226 Difference]: Without dead ends: 95 [2021-01-07 05:09:21,402 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 05:09:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-07 05:09:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-01-07 05:09:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-07 05:09:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-01-07 05:09:21,406 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 79 [2021-01-07 05:09:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:21,408 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-01-07 05:09:21,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-07 05:09:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-01-07 05:09:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-07 05:09:21,411 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:21,411 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 05:09:21,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-07 05:09:21,625 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 05:09:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1384358114, now seen corresponding path program 5 times [2021-01-07 05:09:21,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:21,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144057036] [2021-01-07 05:09:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:21,816 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 05:09:21,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144057036] [2021-01-07 05:09:21,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256451470] [2021-01-07 05:09:21,817 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 05:09:24,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-07 05:09:24,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:09:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:25,101 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 05:09:25,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:25,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-07 05:09:25,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312980059] [2021-01-07 05:09:25,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-07 05:09:25,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-07 05:09:25,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:09:25,104 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 16 states. [2021-01-07 05:09:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:25,261 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2021-01-07 05:09:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-07 05:09:25,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2021-01-07 05:09:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:25,263 INFO L225 Difference]: With dead ends: 102 [2021-01-07 05:09:25,263 INFO L226 Difference]: Without dead ends: 102 [2021-01-07 05:09:25,263 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 05:09:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-07 05:09:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2021-01-07 05:09:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-07 05:09:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-01-07 05:09:25,266 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2021-01-07 05:09:25,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:25,267 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-01-07 05:09:25,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-07 05:09:25,267 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-01-07 05:09:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-07 05:09:25,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:25,268 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 05:09:25,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:25,476 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 05:09:25,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1888928097, now seen corresponding path program 6 times [2021-01-07 05:09:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:25,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816315317] [2021-01-07 05:09:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:25,685 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 05:09:25,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816315317] [2021-01-07 05:09:25,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329423540] [2021-01-07 05:09:25,686 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 05:09:27,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-01-07 05:09:27,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-07 05:09:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:27,685 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 05:09:27,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:27,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-07 05:09:27,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192708333] [2021-01-07 05:09:27,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-07 05:09:27,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:27,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-07 05:09:27,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:09:27,688 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 17 states. [2021-01-07 05:09:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:27,852 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2021-01-07 05:09:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-07 05:09:27,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2021-01-07 05:09:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:27,854 INFO L225 Difference]: With dead ends: 109 [2021-01-07 05:09:27,854 INFO L226 Difference]: Without dead ends: 109 [2021-01-07 05:09:27,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:09:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-07 05:09:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2021-01-07 05:09:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-07 05:09:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-01-07 05:09:27,858 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 88 [2021-01-07 05:09:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:27,858 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-01-07 05:09:27,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-07 05:09:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-01-07 05:09:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-07 05:09:27,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:27,859 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:28,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:28,073 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 05:09:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:28,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1147755650, now seen corresponding path program 7 times [2021-01-07 05:09:28,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:28,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952579257] [2021-01-07 05:09:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-07 05:09:28,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952579257] [2021-01-07 05:09:28,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137988105] [2021-01-07 05:09:28,291 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 05:09:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:28,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-07 05:09:28,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-07 05:09:28,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:28,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-01-07 05:09:28,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78880791] [2021-01-07 05:09:28,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-07 05:09:28,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:28,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-07 05:09:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=559, Unknown=0, NotChecked=0, Total=930 [2021-01-07 05:09:28,700 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 31 states. [2021-01-07 05:09:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:29,011 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-01-07 05:09:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-07 05:09:29,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2021-01-07 05:09:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:29,013 INFO L225 Difference]: With dead ends: 113 [2021-01-07 05:09:29,013 INFO L226 Difference]: Without dead ends: 113 [2021-01-07 05:09:29,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=682, Unknown=0, NotChecked=0, Total=1122 [2021-01-07 05:09:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-07 05:09:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-01-07 05:09:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-07 05:09:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-01-07 05:09:29,017 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 91 [2021-01-07 05:09:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:29,017 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-01-07 05:09:29,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-07 05:09:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-01-07 05:09:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-07 05:09:29,018 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:29,018 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 05:09:29,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:29,232 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 05:09:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:29,233 INFO L82 PathProgramCache]: Analyzing trace with hash -80761369, now seen corresponding path program 8 times [2021-01-07 05:09:29,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:29,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144207656] [2021-01-07 05:09:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:29,476 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 05:09:29,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144207656] [2021-01-07 05:09:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949104249] [2021-01-07 05:09:29,479 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 05:09:29,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:09:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:29,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-07 05:09:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:30,077 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 05:09:30,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:30,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-01-07 05:09:30,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666242821] [2021-01-07 05:09:30,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-07 05:09:30,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-07 05:09:30,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=732, Unknown=0, NotChecked=0, Total=1190 [2021-01-07 05:09:30,081 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 35 states. [2021-01-07 05:09:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:30,453 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2021-01-07 05:09:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-07 05:09:30,453 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2021-01-07 05:09:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:30,454 INFO L225 Difference]: With dead ends: 119 [2021-01-07 05:09:30,455 INFO L226 Difference]: Without dead ends: 119 [2021-01-07 05:09:30,456 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 05:09:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-07 05:09:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-01-07 05:09:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-07 05:09:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-01-07 05:09:30,460 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 103 [2021-01-07 05:09:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:30,461 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-01-07 05:09:30,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-07 05:09:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-01-07 05:09:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-07 05:09:30,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:30,462 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 05:09:30,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-07 05:09:30,676 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 05:09:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:30,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1635779490, now seen corresponding path program 9 times [2021-01-07 05:09:30,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:30,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765186819] [2021-01-07 05:09:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:30,952 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 05:09:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765186819] [2021-01-07 05:09:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576946639] [2021-01-07 05:09:30,953 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 05:09:34,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-01-07 05:09:34,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-07 05:09:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:35,000 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 05:09:35,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:35,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-01-07 05:09:35,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624961015] [2021-01-07 05:09:35,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-07 05:09:35,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:35,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-07 05:09:35,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2021-01-07 05:09:35,003 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 37 states. [2021-01-07 05:09:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:35,312 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2021-01-07 05:09:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-07 05:09:35,313 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2021-01-07 05:09:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:35,315 INFO L225 Difference]: With dead ends: 125 [2021-01-07 05:09:35,315 INFO L226 Difference]: Without dead ends: 125 [2021-01-07 05:09:35,315 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 05:09:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-07 05:09:35,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2021-01-07 05:09:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-07 05:09:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-01-07 05:09:35,319 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 109 [2021-01-07 05:09:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:35,320 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-01-07 05:09:35,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-07 05:09:35,320 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-01-07 05:09:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-07 05:09:35,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:35,321 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 05:09:35,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-07 05:09:35,536 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 05:09:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash 736193415, now seen corresponding path program 10 times [2021-01-07 05:09:35,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:35,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902002874] [2021-01-07 05:09:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:35,863 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 05:09:35,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902002874] [2021-01-07 05:09:35,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319505382] [2021-01-07 05:09:35,864 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 05:09:42,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:09:42,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:09:42,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-07 05:09:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:42,927 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 05:09:42,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:42,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-01-07 05:09:42,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116171371] [2021-01-07 05:09:42,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-07 05:09:42,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-07 05:09:42,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=913, Unknown=0, NotChecked=0, Total=1482 [2021-01-07 05:09:42,930 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 39 states. [2021-01-07 05:09:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:43,272 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2021-01-07 05:09:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-07 05:09:43,272 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2021-01-07 05:09:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:43,274 INFO L225 Difference]: With dead ends: 131 [2021-01-07 05:09:43,274 INFO L226 Difference]: Without dead ends: 131 [2021-01-07 05:09:43,274 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 05:09:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-07 05:09:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-01-07 05:09:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-07 05:09:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-01-07 05:09:43,278 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 115 [2021-01-07 05:09:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:43,279 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-01-07 05:09:43,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-07 05:09:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-01-07 05:09:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-07 05:09:43,280 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:43,280 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 05:09:43,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-07 05:09:43,495 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 05:09:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:43,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1834944254, now seen corresponding path program 11 times [2021-01-07 05:09:43,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:43,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889071454] [2021-01-07 05:09:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:43,792 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 05:09:43,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889071454] [2021-01-07 05:09:43,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700796563] [2021-01-07 05:09:43,793 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 05:10:27,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-07 05:10:27,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:10:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-07 05:10:27,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:10:27,546 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 05:10:27,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:10:27,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-07 05:10:27,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444528804] [2021-01-07 05:10:27,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-07 05:10:27,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:10:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-07 05:10:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-07 05:10:27,548 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 22 states. [2021-01-07 05:10:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:10:27,780 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-01-07 05:10:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-07 05:10:27,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2021-01-07 05:10:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:10:27,782 INFO L225 Difference]: With dead ends: 138 [2021-01-07 05:10:27,782 INFO L226 Difference]: Without dead ends: 138 [2021-01-07 05:10:27,783 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 05:10:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-07 05:10:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2021-01-07 05:10:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-07 05:10:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-01-07 05:10:27,786 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 121 [2021-01-07 05:10:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:10:27,787 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-01-07 05:10:27,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-07 05:10:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-01-07 05:10:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-07 05:10:27,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:10:27,788 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 05:10:28,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-07 05:10:28,002 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 05:10:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:10:28,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2023164607, now seen corresponding path program 12 times [2021-01-07 05:10:28,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:10:28,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796808252] [2021-01-07 05:10:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:10:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:10:28,328 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 05:10:28,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796808252] [2021-01-07 05:10:28,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400661486] [2021-01-07 05:10:28,329 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 05:10:35,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-01-07 05:10:35,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:10:35,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-07 05:10:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:10:36,054 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 05:10:36,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:10:36,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-07 05:10:36,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981075352] [2021-01-07 05:10:36,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-07 05:10:36,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:10:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-07 05:10:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-07 05:10:36,056 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 23 states. [2021-01-07 05:10:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:10:36,289 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2021-01-07 05:10:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-07 05:10:36,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2021-01-07 05:10:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:10:36,290 INFO L225 Difference]: With dead ends: 145 [2021-01-07 05:10:36,291 INFO L226 Difference]: Without dead ends: 145 [2021-01-07 05:10:36,291 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 05:10:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-07 05:10:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2021-01-07 05:10:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-07 05:10:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-01-07 05:10:36,294 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-01-07 05:10:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:10:36,295 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-01-07 05:10:36,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-07 05:10:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-01-07 05:10:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-07 05:10:36,296 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:10:36,296 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 05:10:36,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-07 05:10:36,511 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 05:10:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:10:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash -68412254, now seen corresponding path program 13 times [2021-01-07 05:10:36,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:10:36,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108823408] [2021-01-07 05:10:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:10:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:10:36,883 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 05:10:36,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108823408] [2021-01-07 05:10:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333298486] [2021-01-07 05:10:36,884 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 05:10:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:10:36,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-07 05:10:36,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:10:37,476 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 05:10:37,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:10:37,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2021-01-07 05:10:37,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776553665] [2021-01-07 05:10:37,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-07 05:10:37,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:10:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-07 05:10:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2021-01-07 05:10:37,480 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 43 states. [2021-01-07 05:10:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:10:37,907 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2021-01-07 05:10:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-07 05:10:37,908 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2021-01-07 05:10:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:10:37,909 INFO L225 Difference]: With dead ends: 149 [2021-01-07 05:10:37,909 INFO L226 Difference]: Without dead ends: 149 [2021-01-07 05:10:37,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=803, Invalid=1267, Unknown=0, NotChecked=0, Total=2070 [2021-01-07 05:10:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-01-07 05:10:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2021-01-07 05:10:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-07 05:10:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-01-07 05:10:37,913 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 127 [2021-01-07 05:10:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:10:37,914 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-01-07 05:10:37,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-07 05:10:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-01-07 05:10:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-07 05:10:37,915 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:10:37,915 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 05:10:38,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:10:38,130 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 05:10:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:10:38,131 INFO L82 PathProgramCache]: Analyzing trace with hash 230088391, now seen corresponding path program 14 times [2021-01-07 05:10:38,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:10:38,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248800832] [2021-01-07 05:10:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:10:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:10:38,523 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 05:10:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248800832] [2021-01-07 05:10:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218077786] [2021-01-07 05:10:38,524 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 05:10:38,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:10:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:10:38,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-07 05:10:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:10:39,290 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 05:10:39,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:10:39,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-01-07 05:10:39,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475417651] [2021-01-07 05:10:39,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-07 05:10:39,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:10:39,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-07 05:10:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=1335, Unknown=0, NotChecked=0, Total=2162 [2021-01-07 05:10:39,292 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 47 states. [2021-01-07 05:10:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:10:39,656 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2021-01-07 05:10:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-07 05:10:39,656 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2021-01-07 05:10:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:10:39,657 INFO L225 Difference]: With dead ends: 155 [2021-01-07 05:10:39,658 INFO L226 Difference]: Without dead ends: 155 [2021-01-07 05:10:39,659 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 05:10:39,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-07 05:10:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-01-07 05:10:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-07 05:10:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-01-07 05:10:39,662 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 139 [2021-01-07 05:10:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:10:39,662 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-01-07 05:10:39,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-07 05:10:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-01-07 05:10:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-07 05:10:39,663 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:10:39,664 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 05:10:39,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-07 05:10:39,878 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 05:10:39,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:10:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1821273026, now seen corresponding path program 15 times [2021-01-07 05:10:39,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:10:39,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586610062] [2021-01-07 05:10:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:10:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:10:40,320 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 05:10:40,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586610062] [2021-01-07 05:10:40,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134979857] [2021-01-07 05:10:40,321 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 05:10:59,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-01-07 05:10:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:10:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-07 05:10:59,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:10:59,861 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 05:10:59,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:10:59,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-01-07 05:10:59,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565144991] [2021-01-07 05:10:59,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-07 05:10:59,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:10:59,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-07 05:10:59,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=1453, Unknown=0, NotChecked=0, Total=2352 [2021-01-07 05:10:59,865 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 49 states. [2021-01-07 05:11:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:11:00,236 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2021-01-07 05:11:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-07 05:11:00,237 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2021-01-07 05:11:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:11:00,238 INFO L225 Difference]: With dead ends: 161 [2021-01-07 05:11:00,238 INFO L226 Difference]: Without dead ends: 161 [2021-01-07 05:11:00,239 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 05:11:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-07 05:11:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2021-01-07 05:11:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-07 05:11:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-01-07 05:11:00,243 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 145 [2021-01-07 05:11:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:11:00,243 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-01-07 05:11:00,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-07 05:11:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-01-07 05:11:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-07 05:11:00,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:11:00,245 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 05:11:00,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-07 05:11:00,459 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 05:11:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:11:00,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1610705817, now seen corresponding path program 16 times [2021-01-07 05:11:00,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:11:00,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811645362] [2021-01-07 05:11:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:11:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:11:00,934 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 05:11:00,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811645362] [2021-01-07 05:11:00,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530804679] [2021-01-07 05:11:00,934 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 05:11:51,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:11:51,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:11:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-07 05:11:51,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:11:52,657 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 05:11:52,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:11:52,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-01-07 05:11:52,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140888405] [2021-01-07 05:11:52,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-07 05:11:52,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:11:52,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-07 05:11:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1576, Unknown=0, NotChecked=0, Total=2550 [2021-01-07 05:11:52,660 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 51 states. [2021-01-07 05:11:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:11:53,112 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2021-01-07 05:11:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-07 05:11:53,113 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2021-01-07 05:11:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:11:53,115 INFO L225 Difference]: With dead ends: 167 [2021-01-07 05:11:53,115 INFO L226 Difference]: Without dead ends: 167 [2021-01-07 05:11:53,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1025, Invalid=1627, Unknown=0, NotChecked=0, Total=2652 [2021-01-07 05:11:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-07 05:11:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2021-01-07 05:11:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-07 05:11:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-01-07 05:11:53,120 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 151 [2021-01-07 05:11:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:11:53,120 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-01-07 05:11:53,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-07 05:11:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-01-07 05:11:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-07 05:11:53,121 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:11:53,121 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 05:11:53,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:11:53,322 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 05:11:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:11:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1765206306, now seen corresponding path program 17 times [2021-01-07 05:11:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:11:53,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936912787] [2021-01-07 05:11:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:11:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:11:53,768 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 05:11:53,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936912787] [2021-01-07 05:11:53,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916498903] [2021-01-07 05:11:53,769 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