/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/cstrchr_unsafe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:00:10,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:00:10,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:00:11,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:00:11,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:00:11,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:00:11,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:00:11,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:00:11,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:00:11,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:00:11,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:00:11,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:00:11,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:00:11,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:00:11,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:00:11,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:00:11,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:00:11,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:00:11,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:00:11,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:00:11,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:00:11,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:00:11,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:00:11,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:00:11,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-07 05:00:11,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-07 05:00:11,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-07 05:00:11,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-07 05:00:11,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-07 05:00:11,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-07 05:00:11,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:00:11,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:00:11,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:00:11,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:00:11,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:00:11,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:00:11,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:00:11,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:00:11,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:00:11,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:00:11,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:00:11,082 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 05:00:11,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:00:11,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:00:11,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:00:11,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:00:11,114 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:00:11,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:00:11,115 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:00:11,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:00:11,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:00:11,116 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:00:11,116 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:00:11,117 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:00:11,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:00:11,117 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:00:11,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:00:11,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:00:11,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:00:11,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:00:11,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:00:11,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:00:11,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:00:11,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:00:11,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:00:11,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:00:11,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:00:11,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:00:11,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:00:11,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:00:11,620 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:00:11,621 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:00:11,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2021-01-07 05:00:11,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/02039553d/1428bf5af3e94b0bb442f01305c20628/FLAGb9c506251 [2021-01-07 05:00:12,383 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:00:12,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2021-01-07 05:00:12,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/02039553d/1428bf5af3e94b0bb442f01305c20628/FLAGb9c506251 [2021-01-07 05:00:12,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/02039553d/1428bf5af3e94b0bb442f01305c20628 [2021-01-07 05:00:12,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:00:12,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:00:12,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:00:12,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:00:12,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:00:12,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:00:12" (1/1) ... [2021-01-07 05:00:12,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261d16f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:12, skipping insertion in model container [2021-01-07 05:00:12,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:00:12" (1/1) ... [2021-01-07 05:00:12,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:00:12,805 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]]]]] [2021-01-07 05:00:13,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:00:13,174 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]]]]] [2021-01-07 05:00:13,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:00:13,331 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:00:13,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13 WrapperNode [2021-01-07 05:00:13,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:00:13,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:00:13,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:00:13,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:00:13,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:00:13,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:00:13,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:00:13,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:00:13,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (1/1) ... [2021-01-07 05:00:13,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:00:13,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:00:13,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:00:13,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:00:13,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (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 05:00:13,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:00:13,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:00:13,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-07 05:00:13,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:00:13,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:00:13,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:00:14,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:00:14,104 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-07 05:00:14,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:14 BoogieIcfgContainer [2021-01-07 05:00:14,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:00:14,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:00:14,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:00:14,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:00:14,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:00:12" (1/3) ... [2021-01-07 05:00:14,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c7f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:00:14, skipping insertion in model container [2021-01-07 05:00:14,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:13" (2/3) ... [2021-01-07 05:00:14,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c7f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:00:14, skipping insertion in model container [2021-01-07 05:00:14,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:14" (3/3) ... [2021-01-07 05:00:14,115 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2021-01-07 05:00:14,122 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:00:14,127 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2021-01-07 05:00:14,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-01-07 05:00:14,172 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:00:14,172 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:00:14,172 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:00:14,172 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:00:14,172 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:00:14,172 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:00:14,173 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:00:14,173 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:00:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2021-01-07 05:00:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:00:14,195 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:14,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:00:14,197 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-01-07 05:00:14,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:14,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280860148] [2021-01-07 05:00:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:14,503 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 05:00:14,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280860148] [2021-01-07 05:00:14,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:14,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:00:14,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249606542] [2021-01-07 05:00:14,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:00:14,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:14,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:00:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:00:14,539 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2021-01-07 05:00:14,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:14,636 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-01-07 05:00:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:00:14,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:00:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:14,656 INFO L225 Difference]: With dead ends: 82 [2021-01-07 05:00:14,657 INFO L226 Difference]: Without dead ends: 78 [2021-01-07 05:00:14,659 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 05:00:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-07 05:00:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2021-01-07 05:00:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-07 05:00:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-01-07 05:00:14,708 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 6 [2021-01-07 05:00:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:14,709 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-01-07 05:00:14,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:00:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-01-07 05:00:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:00:14,709 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:14,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:00:14,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:00:14,711 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-01-07 05:00:14,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:14,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509663100] [2021-01-07 05:00:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:14,806 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 05:00:14,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509663100] [2021-01-07 05:00:14,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:14,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:00:14,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936934119] [2021-01-07 05:00:14,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:00:14,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:14,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:00:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:00:14,812 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 3 states. [2021-01-07 05:00:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:14,892 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-01-07 05:00:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:00:14,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-07 05:00:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:14,898 INFO L225 Difference]: With dead ends: 43 [2021-01-07 05:00:14,898 INFO L226 Difference]: Without dead ends: 43 [2021-01-07 05:00:14,899 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 05:00:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-07 05:00:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-07 05:00:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-07 05:00:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-01-07 05:00:14,913 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 6 [2021-01-07 05:00:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:14,913 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-01-07 05:00:14,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:00:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-01-07 05:00:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:00:14,915 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:14,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:00:14,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:00:14,915 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:14,918 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-01-07 05:00:14,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:14,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449962060] [2021-01-07 05:00:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:15,039 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 05:00:15,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449962060] [2021-01-07 05:00:15,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:15,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:00:15,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137528439] [2021-01-07 05:00:15,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:00:15,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:15,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:00:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:00:15,043 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2021-01-07 05:00:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:15,104 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-01-07 05:00:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:00:15,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:00:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:15,106 INFO L225 Difference]: With dead ends: 42 [2021-01-07 05:00:15,106 INFO L226 Difference]: Without dead ends: 42 [2021-01-07 05:00:15,106 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 05:00:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-07 05:00:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-07 05:00:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-07 05:00:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-01-07 05:00:15,112 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 6 [2021-01-07 05:00:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:15,112 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-01-07 05:00:15,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:00:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-01-07 05:00:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:00:15,113 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:15,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:00:15,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:00:15,114 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-01-07 05:00:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:15,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102986017] [2021-01-07 05:00:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:15,235 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 05:00:15,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102986017] [2021-01-07 05:00:15,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:15,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:00:15,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414603172] [2021-01-07 05:00:15,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:00:15,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:15,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:00:15,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:00:15,241 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2021-01-07 05:00:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:15,412 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-01-07 05:00:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:00:15,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-01-07 05:00:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:15,415 INFO L225 Difference]: With dead ends: 77 [2021-01-07 05:00:15,415 INFO L226 Difference]: Without dead ends: 77 [2021-01-07 05:00:15,416 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 05:00:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-07 05:00:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-01-07 05:00:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-07 05:00:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-01-07 05:00:15,422 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 6 [2021-01-07 05:00:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:15,422 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-01-07 05:00:15,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:00:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-01-07 05:00:15,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:00:15,423 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:15,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:15,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:00:15,424 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash -590959631, now seen corresponding path program 1 times [2021-01-07 05:00:15,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:15,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675596460] [2021-01-07 05:00:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:15,480 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 05:00:15,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675596460] [2021-01-07 05:00:15,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:15,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:00:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723982319] [2021-01-07 05:00:15,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:00:15,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:00:15,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:00:15,484 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 5 states. [2021-01-07 05:00:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:15,635 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-07 05:00:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:00:15,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-07 05:00:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:15,640 INFO L225 Difference]: With dead ends: 41 [2021-01-07 05:00:15,640 INFO L226 Difference]: Without dead ends: 41 [2021-01-07 05:00:15,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-07 05:00:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-07 05:00:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-07 05:00:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-01-07 05:00:15,651 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 9 [2021-01-07 05:00:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:15,652 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-01-07 05:00:15,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:00:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-01-07 05:00:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:00:15,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:15,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:15,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-07 05:00:15,658 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:15,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash -590959630, now seen corresponding path program 1 times [2021-01-07 05:00:15,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:15,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808843150] [2021-01-07 05:00:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:15,768 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 05:00:15,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808843150] [2021-01-07 05:00:15,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:15,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-07 05:00:15,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597949559] [2021-01-07 05:00:15,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-07 05:00:15,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:15,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-07 05:00:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:15,771 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 7 states. [2021-01-07 05:00:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:15,924 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-01-07 05:00:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:00:15,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-07 05:00:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:15,925 INFO L225 Difference]: With dead ends: 63 [2021-01-07 05:00:15,926 INFO L226 Difference]: Without dead ends: 63 [2021-01-07 05:00:15,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:00:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-07 05:00:15,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2021-01-07 05:00:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-07 05:00:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-01-07 05:00:15,931 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 9 [2021-01-07 05:00:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:15,932 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-01-07 05:00:15,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-07 05:00:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-01-07 05:00:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-07 05:00:15,933 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:15,933 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:15,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-07 05:00:15,933 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:15,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-01-07 05:00:15,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:15,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760015152] [2021-01-07 05:00:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:16,026 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 05:00:16,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760015152] [2021-01-07 05:00:16,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012391554] [2021-01-07 05:00:16,035 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 05:00:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:16,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-07 05:00:16,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:16,209 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 05:00:16,211 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:16,223 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:16,224 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:00:16,225 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:00:16,299 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 05:00:16,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:00:16,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-07 05:00:16,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070196777] [2021-01-07 05:00:16,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:00:16,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:16,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:00:16,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:00:16,301 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 6 states. [2021-01-07 05:00:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:16,488 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-01-07 05:00:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:00:16,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-07 05:00:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:16,489 INFO L225 Difference]: With dead ends: 84 [2021-01-07 05:00:16,490 INFO L226 Difference]: Without dead ends: 84 [2021-01-07 05:00:16,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-07 05:00:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2021-01-07 05:00:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-07 05:00:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-01-07 05:00:16,495 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 10 [2021-01-07 05:00:16,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:16,495 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-01-07 05:00:16,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:00:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-01-07 05:00:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-07 05:00:16,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:16,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:16,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-07 05:00:16,712 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:16,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2134761079, now seen corresponding path program 1 times [2021-01-07 05:00:16,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:16,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798066907] [2021-01-07 05:00:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:16,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798066907] [2021-01-07 05:00:16,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:16,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:00:16,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880410132] [2021-01-07 05:00:16,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:00:16,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:16,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:00:16,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:00:16,765 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 3 states. [2021-01-07 05:00:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:16,776 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-01-07 05:00:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:00:16,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-01-07 05:00:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:16,778 INFO L225 Difference]: With dead ends: 47 [2021-01-07 05:00:16,778 INFO L226 Difference]: Without dead ends: 47 [2021-01-07 05:00:16,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:00:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-07 05:00:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-07 05:00:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-07 05:00:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-01-07 05:00:16,782 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 13 [2021-01-07 05:00:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:16,782 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-01-07 05:00:16,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:00:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-01-07 05:00:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:00:16,784 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:16,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:16,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-07 05:00:16,784 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1483111174, now seen corresponding path program 1 times [2021-01-07 05:00:16,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:16,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888292693] [2021-01-07 05:00:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:16,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888292693] [2021-01-07 05:00:16,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:16,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-07 05:00:16,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820650086] [2021-01-07 05:00:16,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-07 05:00:16,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:16,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-07 05:00:16,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:00:16,955 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2021-01-07 05:00:17,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:17,178 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-01-07 05:00:17,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:00:17,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-01-07 05:00:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:17,179 INFO L225 Difference]: With dead ends: 70 [2021-01-07 05:00:17,180 INFO L226 Difference]: Without dead ends: 70 [2021-01-07 05:00:17,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-01-07 05:00:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-07 05:00:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-01-07 05:00:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-07 05:00:17,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-01-07 05:00:17,185 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2021-01-07 05:00:17,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:17,185 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-01-07 05:00:17,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-07 05:00:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-01-07 05:00:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:00:17,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:17,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:17,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-07 05:00:17,187 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:17,188 INFO L82 PathProgramCache]: Analyzing trace with hash 896305160, now seen corresponding path program 1 times [2021-01-07 05:00:17,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:17,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175824117] [2021-01-07 05:00:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:17,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175824117] [2021-01-07 05:00:17,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:17,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-01-07 05:00:17,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421161919] [2021-01-07 05:00:17,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-07 05:00:17,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:17,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-07 05:00:17,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:00:17,344 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 10 states. [2021-01-07 05:00:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:17,606 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-01-07 05:00:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-07 05:00:17,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2021-01-07 05:00:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:17,607 INFO L225 Difference]: With dead ends: 80 [2021-01-07 05:00:17,607 INFO L226 Difference]: Without dead ends: 80 [2021-01-07 05:00:17,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:00:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-07 05:00:17,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-01-07 05:00:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-07 05:00:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-01-07 05:00:17,612 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 15 [2021-01-07 05:00:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:17,612 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-01-07 05:00:17,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-07 05:00:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-01-07 05:00:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-07 05:00:17,613 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:17,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:17,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-07 05:00:17,614 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash 639793573, now seen corresponding path program 1 times [2021-01-07 05:00:17,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:17,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088251484] [2021-01-07 05:00:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:17,674 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 05:00:17,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088251484] [2021-01-07 05:00:17,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:17,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-07 05:00:17,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337507114] [2021-01-07 05:00:17,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:00:17,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:17,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:00:17,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:00:17,676 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 8 states. [2021-01-07 05:00:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:17,852 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-01-07 05:00:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:00:17,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-01-07 05:00:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:17,853 INFO L225 Difference]: With dead ends: 65 [2021-01-07 05:00:17,854 INFO L226 Difference]: Without dead ends: 65 [2021-01-07 05:00:17,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-01-07 05:00:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-07 05:00:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-01-07 05:00:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-07 05:00:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-01-07 05:00:17,858 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 17 [2021-01-07 05:00:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:17,858 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-01-07 05:00:17,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:00:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-01-07 05:00:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-07 05:00:17,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:17,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:17,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-07 05:00:17,860 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash 639793574, now seen corresponding path program 1 times [2021-01-07 05:00:17,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:17,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259073837] [2021-01-07 05:00:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:18,003 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 05:00:18,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259073837] [2021-01-07 05:00:18,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:18,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-07 05:00:18,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23128205] [2021-01-07 05:00:18,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-07 05:00:18,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:18,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-07 05:00:18,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:00:18,007 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 10 states. [2021-01-07 05:00:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:18,257 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-01-07 05:00:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:00:18,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-07 05:00:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:18,260 INFO L225 Difference]: With dead ends: 84 [2021-01-07 05:00:18,260 INFO L226 Difference]: Without dead ends: 84 [2021-01-07 05:00:18,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-01-07 05:00:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-07 05:00:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2021-01-07 05:00:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-07 05:00:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-01-07 05:00:18,265 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 17 [2021-01-07 05:00:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:18,265 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-01-07 05:00:18,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-07 05:00:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-01-07 05:00:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-07 05:00:18,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:18,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:18,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-07 05:00:18,268 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:00:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:18,268 INFO L82 PathProgramCache]: Analyzing trace with hash 639853155, now seen corresponding path program 1 times [2021-01-07 05:00:18,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:18,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254202348] [2021-01-07 05:00:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-07 05:00:18,283 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-07 05:00:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-07 05:00:18,294 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-07 05:00:18,318 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-07 05:00:18,318 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-07 05:00:18,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-07 05:00:18,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:00:18 BoogieIcfgContainer [2021-01-07 05:00:18,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:00:18,369 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:00:18,369 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:00:18,369 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:00:18,373 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:14" (3/4) ... [2021-01-07 05:00:18,377 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-07 05:00:18,476 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/cstrchr_unsafe.i-witness.graphml [2021-01-07 05:00:18,476 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:00:18,478 INFO L168 Benchmark]: Toolchain (without parser) took 5769.38 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 127.0 MB in the beginning and 102.0 MB in the end (delta: 25.0 MB). Peak memory consumption was 64.8 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:18,479 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:00:18,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 620.27 ms. Allocated memory is still 152.0 MB. Free memory was 126.8 MB in the beginning and 106.2 MB in the end (delta: 20.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:18,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.53 ms. Allocated memory is still 152.0 MB. Free memory was 106.0 MB in the beginning and 104.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:18,484 INFO L168 Benchmark]: Boogie Preprocessor took 32.11 ms. Allocated memory is still 152.0 MB. Free memory was 104.3 MB in the beginning and 103.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:18,485 INFO L168 Benchmark]: RCFGBuilder took 682.97 ms. Allocated memory is still 152.0 MB. Free memory was 102.8 MB in the beginning and 116.4 MB in the end (delta: -13.6 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:18,488 INFO L168 Benchmark]: TraceAbstraction took 4261.01 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 115.9 MB in the beginning and 104.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 51.6 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:18,489 INFO L168 Benchmark]: Witness Printer took 107.02 ms. Allocated memory is still 190.8 MB. Free memory was 104.1 MB in the beginning and 102.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:00:18,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 620.27 ms. Allocated memory is still 152.0 MB. Free memory was 126.8 MB in the beginning and 106.2 MB in the end (delta: 20.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 55.53 ms. Allocated memory is still 152.0 MB. Free memory was 106.0 MB in the beginning and 104.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.11 ms. Allocated memory is still 152.0 MB. Free memory was 104.3 MB in the beginning and 103.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 682.97 ms. Allocated memory is still 152.0 MB. Free memory was 102.8 MB in the beginning and 116.4 MB in the end (delta: -13.6 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4261.01 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 115.9 MB in the beginning and 104.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 51.6 MB. Max. memory is 8.0 GB. * Witness Printer took 107.02 ms. Allocated memory is still 190.8 MB. Free memory was 104.1 MB in the beginning and 102.0 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: 537]: 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) [L526] nondetString[length-1] = '\0' [L527] return nondetString; [L536] char* s = build_nondet_String(); [L531] EXPR \read(*s) [L531] *s != '\0' && *s != (char)c [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) [L533] EXPR (*s == c) ? (char *) s : 0 [L533] return ( (*s == c) ? (char *) s : 0 ); - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 13, TraceHistogramMax: 2, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 361 SDtfs, 1283 SDslu, 763 SDs, 0 SdLazy, 687 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 194 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 7497 SizeOfPredicates, 3 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 13 InterpolantComputations, 11 PerfectInterpolantSequences, 4/7 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...