/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/array-memsafety/cstrpbrk_unsafe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:00:22,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:00:22,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:00:23,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:00:23,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:00:23,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:00:23,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:00:23,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:00:23,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:00:23,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:00:23,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:00:23,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:00:23,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:00:23,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:00:23,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:00:23,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:00:23,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:00:23,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:00:23,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:00:23,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:00:23,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:00:23,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:00:23,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:00:23,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:00:23,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-07 05:00:23,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:00:23,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:00:23,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:00:23,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:00:23,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:00:23,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:00:23,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:00:23,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:00:23,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:00:23,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:00:23,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:00:23,127 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 05:00:23,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:00:23,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:00:23,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:00:23,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:00:23,155 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:00:23,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:00:23,156 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:00:23,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:00:23,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:00:23,157 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:00:23,157 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:00:23,157 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:00:23,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:00:23,157 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:00:23,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:00:23,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:00:23,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:00:23,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:00:23,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:00:23,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:00:23,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:00:23,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:00:23,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:00:23,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:00:23,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:00:23,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:00:23,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:00:23,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:00:23,566 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:00:23,568 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:00:23,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-01-07 05:00:23,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/560f50b60/05b07f98e4bd4b608fe75247d876475a/FLAG5a568540a [2021-01-07 05:00:24,370 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:00:24,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-01-07 05:00:24,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/560f50b60/05b07f98e4bd4b608fe75247d876475a/FLAG5a568540a [2021-01-07 05:00:24,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/560f50b60/05b07f98e4bd4b608fe75247d876475a [2021-01-07 05:00:24,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:00:24,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:00:24,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:00:24,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:00:24,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:00:24,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:00:24" (1/1) ... [2021-01-07 05:00:24,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b76607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:24, skipping insertion in model container [2021-01-07 05:00:24,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:00:24" (1/1) ... [2021-01-07 05:00:24,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:00:24,775 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length~0,],IntegerLiteral[1]]]]] left hand side expression in assignment: lhs: VariableLHS[~sc1~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] [2021-01-07 05:00:25,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:00:25,102 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length~0,],IntegerLiteral[1]]]]] left hand side expression in assignment: lhs: VariableLHS[~sc1~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] [2021-01-07 05:00:25,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:00:25,211 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:00:25,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25 WrapperNode [2021-01-07 05:00:25,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:00:25,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:00:25,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:00:25,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:00:25,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:00:25,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:00:25,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:00:25,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:00:25,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (1/1) ... [2021-01-07 05:00:25,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:00:25,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:00:25,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:00:25,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:00:25,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (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 05:00:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:00:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:00:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-07 05:00:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:00:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:00:25,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:00:26,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:00:26,032 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-07 05:00:26,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:26 BoogieIcfgContainer [2021-01-07 05:00:26,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:00:26,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:00:26,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:00:26,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:00:26,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:00:24" (1/3) ... [2021-01-07 05:00:26,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c63688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:00:26, skipping insertion in model container [2021-01-07 05:00:26,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:25" (2/3) ... [2021-01-07 05:00:26,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c63688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:00:26, skipping insertion in model container [2021-01-07 05:00:26,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:26" (3/3) ... [2021-01-07 05:00:26,044 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2021-01-07 05:00:26,050 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:00:26,056 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2021-01-07 05:00:26,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-01-07 05:00:26,099 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:00:26,100 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:00:26,100 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:00:26,100 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:00:26,100 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:00:26,101 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:00:26,101 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:00:26,101 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:00:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2021-01-07 05:00:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:00:26,126 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:26,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:00:26,128 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-01-07 05:00:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-01-07 05:00:26,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:26,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313581846] [2021-01-07 05:00:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:26,334 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 05:00:26,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313581846] [2021-01-07 05:00:26,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:26,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:00:26,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526903167] [2021-01-07 05:00:26,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:00:26,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:26,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:00:26,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:00:26,363 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 4 states. [2021-01-07 05:00:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:26,449 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-01-07 05:00:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:00:26,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:00:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:26,464 INFO L225 Difference]: With dead ends: 132 [2021-01-07 05:00:26,464 INFO L226 Difference]: Without dead ends: 128 [2021-01-07 05:00:26,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:00:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-07 05:00:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 75. [2021-01-07 05:00:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-07 05:00:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-01-07 05:00:26,531 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 6 [2021-01-07 05:00:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:26,531 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-01-07 05:00:26,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:00:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-01-07 05:00:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:00:26,532 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:26,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:00:26,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:00:26,533 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-01-07 05:00:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-01-07 05:00:26,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:26,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695773192] [2021-01-07 05:00:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:26,577 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 05:00:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695773192] [2021-01-07 05:00:26,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:26,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:00:26,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758459824] [2021-01-07 05:00:26,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:00:26,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:26,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:00:26,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:00:26,582 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 3 states. [2021-01-07 05:00:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:26,658 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-01-07 05:00:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:00:26,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-07 05:00:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:26,660 INFO L225 Difference]: With dead ends: 71 [2021-01-07 05:00:26,660 INFO L226 Difference]: Without dead ends: 71 [2021-01-07 05:00:26,661 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 05:00:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-07 05:00:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-01-07 05:00:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-07 05:00:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-01-07 05:00:26,670 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 6 [2021-01-07 05:00:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:26,670 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-01-07 05:00:26,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:00:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-01-07 05:00:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:00:26,671 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:26,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:00:26,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:00:26,672 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-01-07 05:00:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-01-07 05:00:26,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:26,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342603461] [2021-01-07 05:00:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:26,782 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 05:00:26,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342603461] [2021-01-07 05:00:26,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:26,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:00:26,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634210008] [2021-01-07 05:00:26,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:00:26,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:00:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:00:26,791 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 4 states. [2021-01-07 05:00:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:26,909 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-01-07 05:00:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:00:26,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:00:26,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:26,916 INFO L225 Difference]: With dead ends: 69 [2021-01-07 05:00:26,917 INFO L226 Difference]: Without dead ends: 69 [2021-01-07 05:00:26,918 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 05:00:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-07 05:00:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-07 05:00:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-07 05:00:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-01-07 05:00:26,940 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 6 [2021-01-07 05:00:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:26,942 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-01-07 05:00:26,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:00:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-01-07 05:00:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:00:26,943 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:26,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:00:26,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:00:26,945 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-01-07 05:00:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-01-07 05:00:26,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:26,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620633207] [2021-01-07 05:00:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:27,063 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 05:00:27,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620633207] [2021-01-07 05:00:27,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:27,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:00:27,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983907774] [2021-01-07 05:00:27,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:00:27,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:27,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:00:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:00:27,067 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 5 states. [2021-01-07 05:00:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:27,254 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2021-01-07 05:00:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:00:27,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-01-07 05:00:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:27,258 INFO L225 Difference]: With dead ends: 126 [2021-01-07 05:00:27,258 INFO L226 Difference]: Without dead ends: 126 [2021-01-07 05:00:27,259 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 05:00:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-07 05:00:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-01-07 05:00:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-07 05:00:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-01-07 05:00:27,279 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 6 [2021-01-07 05:00:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:27,282 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-01-07 05:00:27,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:00:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-01-07 05:00:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-07 05:00:27,283 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:27,283 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:27,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:00:27,284 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-01-07 05:00:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:27,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-01-07 05:00:27,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:27,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096945634] [2021-01-07 05:00:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:27,423 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 05:00:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096945634] [2021-01-07 05:00:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201451165] [2021-01-07 05:00:27,424 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 05:00:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-07 05:00:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:27,584 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:00:27,586 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:27,592 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:27,594 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:00:27,594 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:00:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:27,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:00:27,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-07 05:00:27,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527564779] [2021-01-07 05:00:27,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:00:27,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:00:27,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:00:27,649 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 6 states. [2021-01-07 05:00:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:27,847 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-01-07 05:00:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:00:27,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-07 05:00:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:27,849 INFO L225 Difference]: With dead ends: 124 [2021-01-07 05:00:27,849 INFO L226 Difference]: Without dead ends: 124 [2021-01-07 05:00:27,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-07 05:00:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 67. [2021-01-07 05:00:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-07 05:00:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-01-07 05:00:27,859 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 10 [2021-01-07 05:00:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:27,859 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-01-07 05:00:27,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:00:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-01-07 05:00:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:00:27,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:27,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:28,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:28,075 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-01-07 05:00:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:28,076 INFO L82 PathProgramCache]: Analyzing trace with hash -318278276, now seen corresponding path program 1 times [2021-01-07 05:00:28,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:28,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490179434] [2021-01-07 05:00:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:28,231 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 05:00:28,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490179434] [2021-01-07 05:00:28,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:28,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:00:28,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122901992] [2021-01-07 05:00:28,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:00:28,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:00:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:00:28,233 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 6 states. [2021-01-07 05:00:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:28,377 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-01-07 05:00:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:00:28,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-07 05:00:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:28,379 INFO L225 Difference]: With dead ends: 64 [2021-01-07 05:00:28,379 INFO L226 Difference]: Without dead ends: 64 [2021-01-07 05:00:28,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:00:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-07 05:00:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-07 05:00:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-07 05:00:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-01-07 05:00:28,397 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 15 [2021-01-07 05:00:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:28,397 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-01-07 05:00:28,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:00:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-01-07 05:00:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:00:28,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:28,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:28,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-07 05:00:28,401 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-01-07 05:00:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:28,402 INFO L82 PathProgramCache]: Analyzing trace with hash -318278275, now seen corresponding path program 1 times [2021-01-07 05:00:28,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:28,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557315143] [2021-01-07 05:00:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:28,600 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 05:00:28,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557315143] [2021-01-07 05:00:28,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:28,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-07 05:00:28,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741942196] [2021-01-07 05:00:28,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-07 05:00:28,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-07 05:00:28,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:00:28,603 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 9 states. [2021-01-07 05:00:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:29,048 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-01-07 05:00:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-07 05:00:29,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-01-07 05:00:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:29,049 INFO L225 Difference]: With dead ends: 100 [2021-01-07 05:00:29,050 INFO L226 Difference]: Without dead ends: 100 [2021-01-07 05:00:29,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:00:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-07 05:00:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2021-01-07 05:00:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-07 05:00:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-01-07 05:00:29,053 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 15 [2021-01-07 05:00:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:29,054 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-01-07 05:00:29,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-07 05:00:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-01-07 05:00:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-07 05:00:29,055 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:29,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:29,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-07 05:00:29,055 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-01-07 05:00:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:29,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1993585557, now seen corresponding path program 1 times [2021-01-07 05:00:29,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:29,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752971479] [2021-01-07 05:00:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-07 05:00:29,077 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-07 05:00:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-07 05:00:29,097 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-07 05:00:29,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-07 05:00:29,118 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-07 05:00:29,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-07 05:00:29,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:00:29 BoogieIcfgContainer [2021-01-07 05:00:29,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:00:29,150 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:00:29,150 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:00:29,151 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:00:29,151 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:26" (3/4) ... [2021-01-07 05:00:29,153 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-07 05:00:29,212 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/cstrpbrk_unsafe.i-witness.graphml [2021-01-07 05:00:29,212 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:00:29,214 INFO L168 Benchmark]: Toolchain (without parser) took 4530.03 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.0 MB in the beginning and 70.4 MB in the end (delta: 54.6 MB). Peak memory consumption was 86.3 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:29,214 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:00:29,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 524.70 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 103.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:29,216 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.59 ms. Allocated memory is still 151.0 MB. Free memory was 103.9 MB in the beginning and 101.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:29,216 INFO L168 Benchmark]: Boogie Preprocessor took 96.95 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 132.6 MB in the end (delta: -30.8 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:29,217 INFO L168 Benchmark]: RCFGBuilder took 668.94 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 106.9 MB in the end (delta: 25.7 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:29,218 INFO L168 Benchmark]: TraceAbstraction took 3113.52 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 106.4 MB in the beginning and 72.5 MB in the end (delta: 33.9 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:29,221 INFO L168 Benchmark]: Witness Printer took 61.99 ms. Allocated memory is still 181.4 MB. Free memory was 72.5 MB in the beginning and 70.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:29,225 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 524.70 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 103.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 53.59 ms. Allocated memory is still 151.0 MB. Free memory was 103.9 MB in the beginning and 101.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 96.95 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 132.6 MB in the end (delta: -30.8 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 668.94 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 106.9 MB in the end (delta: 25.7 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3113.52 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 106.4 MB in the beginning and 72.5 MB in the end (delta: 33.9 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. * Witness Printer took 61.99 ms. Allocated memory is still 181.4 MB. Free memory was 72.5 MB in the beginning and 70.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 548]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L546] char* s1 = build_nondet_String(); [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L547] char* s2 = build_nondet_String(); [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 [L535] EXPR \read(*sc1) [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 73 locations, 27 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 369 SDtfs, 1333 SDslu, 419 SDs, 0 SdLazy, 518 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 197 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 4453 SizeOfPredicates, 3 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...