/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/list-ext-properties/960521-1_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:07:15,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:07:15,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:07:15,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:07:15,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:07:15,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:07:15,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:07:15,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:07:15,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:07:15,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:07:15,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:07:15,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:07:15,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:07:15,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:07:15,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:07:15,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:07:15,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:07:15,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:07:15,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:07:15,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:07:15,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:07:15,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:07:15,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:07:15,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:07:15,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 17:07:15,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 17:07:15,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 17:07:15,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 17:07:15,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 17:07:15,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 17:07:15,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:07:15,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:07:15,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:07:15,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:07:15,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:07:15,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:07:15,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:07:15,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:07:15,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:07:15,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:07:15,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:07:15,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 17:07:15,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:07:15,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:07:15,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:07:15,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:07:15,679 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:07:15,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:07:15,679 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:07:15,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:07:15,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:07:15,680 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:07:15,681 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:07:15,682 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:07:15,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:07:15,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:07:15,682 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:07:15,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:07:15,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:07:15,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:07:15,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:07:15,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:07:15,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:07:15,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:07:15,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:07:15,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:07:15,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:07:16,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:07:16,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:07:16,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:07:16,137 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:07:16,138 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:07:16,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-2.i [2020-12-23 17:07:16,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9017500ac/43f75a911af84dc9b946f74b94949cb3/FLAG44b4e8062 [2020-12-23 17:07:17,048 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:07:17,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-2.i [2020-12-23 17:07:17,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9017500ac/43f75a911af84dc9b946f74b94949cb3/FLAG44b4e8062 [2020-12-23 17:07:17,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9017500ac/43f75a911af84dc9b946f74b94949cb3 [2020-12-23 17:07:17,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:07:17,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:07:17,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:07:17,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:07:17,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:07:17,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:07:17" (1/1) ... [2020-12-23 17:07:17,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5841a0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:17, skipping insertion in model container [2020-12-23 17:07:17,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:07:17" (1/1) ... [2020-12-23 17:07:17,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:07:17,408 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post11,] [2020-12-23 17:07:17,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:07:17,880 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post11,] [2020-12-23 17:07:18,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:07:18,121 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:07:18,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18 WrapperNode [2020-12-23 17:07:18,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:07:18,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:07:18,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:07:18,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:07:18,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:07:18,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:07:18,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:07:18,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:07:18,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... [2020-12-23 17:07:18,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:07:18,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:07:18,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:07:18,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:07:18,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:07:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:07:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:07:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 17:07:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:07:18,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:07:18,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 17:07:18,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:07:18,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:07:19,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:07:19,424 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 17:07:19,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:07:19 BoogieIcfgContainer [2020-12-23 17:07:19,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:07:19,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:07:19,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:07:19,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:07:19,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:07:17" (1/3) ... [2020-12-23 17:07:19,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6785f68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:07:19, skipping insertion in model container [2020-12-23 17:07:19,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:07:18" (2/3) ... [2020-12-23 17:07:19,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6785f68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:07:19, skipping insertion in model container [2020-12-23 17:07:19,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:07:19" (3/3) ... [2020-12-23 17:07:19,441 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-2.i [2020-12-23 17:07:19,451 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:07:19,460 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-12-23 17:07:19,488 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-12-23 17:07:19,520 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:07:19,520 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:07:19,520 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:07:19,520 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:07:19,520 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:07:19,521 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:07:19,521 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:07:19,521 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:07:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-12-23 17:07:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 17:07:19,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:19,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 17:07:19,561 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:19,572 INFO L82 PathProgramCache]: Analyzing trace with hash 28702701, now seen corresponding path program 1 times [2020-12-23 17:07:19,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:19,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238958657] [2020-12-23 17:07:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:19,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238958657] [2020-12-23 17:07:19,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:19,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:07:19,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952922387] [2020-12-23 17:07:19,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 17:07:19,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:19,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 17:07:19,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:07:19,843 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2020-12-23 17:07:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:19,861 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-12-23 17:07:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 17:07:19,866 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-23 17:07:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:19,879 INFO L225 Difference]: With dead ends: 56 [2020-12-23 17:07:19,880 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 17:07:19,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:07:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 17:07:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 17:07:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 17:07:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-12-23 17:07:19,929 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 5 [2020-12-23 17:07:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:19,929 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-12-23 17:07:19,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 17:07:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-12-23 17:07:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:07:19,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:19,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:07:19,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:07:19,932 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash 889569384, now seen corresponding path program 1 times [2020-12-23 17:07:19,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:19,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461953303] [2020-12-23 17:07:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:20,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461953303] [2020-12-23 17:07:20,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:20,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:07:20,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811238873] [2020-12-23 17:07:20,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:07:20,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:20,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:07:20,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:07:20,079 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 3 states. [2020-12-23 17:07:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:20,195 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-12-23 17:07:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:07:20,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 17:07:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:20,200 INFO L225 Difference]: With dead ends: 53 [2020-12-23 17:07:20,200 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 17:07:20,201 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 [2020-12-23 17:07:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 17:07:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 17:07:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 17:07:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-12-23 17:07:20,222 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 6 [2020-12-23 17:07:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:20,223 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-12-23 17:07:20,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:07:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-12-23 17:07:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:07:20,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:20,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:07:20,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:07:20,226 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 889569385, now seen corresponding path program 1 times [2020-12-23 17:07:20,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:20,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352781392] [2020-12-23 17:07:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:20,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352781392] [2020-12-23 17:07:20,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:20,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:07:20,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566361733] [2020-12-23 17:07:20,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:07:20,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:07:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:07:20,342 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 4 states. [2020-12-23 17:07:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:20,452 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-12-23 17:07:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:07:20,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 17:07:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:20,455 INFO L225 Difference]: With dead ends: 103 [2020-12-23 17:07:20,456 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 17:07:20,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:07:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 17:07:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-12-23 17:07:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 17:07:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-23 17:07:20,466 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 6 [2020-12-23 17:07:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:20,466 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-23 17:07:20,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:07:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-23 17:07:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 17:07:20,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:20,468 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:20,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:07:20,468 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 179257870, now seen corresponding path program 1 times [2020-12-23 17:07:20,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:20,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119958222] [2020-12-23 17:07:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:20,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119958222] [2020-12-23 17:07:20,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481411879] [2020-12-23 17:07:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 17:07:20,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:20,777 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:20,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:20,781 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:20,793 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:20,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:20,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-23 17:07:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:20,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:07:20,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-23 17:07:20,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409857077] [2020-12-23 17:07:20,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:07:20,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:07:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:07:20,887 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 5 states. [2020-12-23 17:07:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:21,054 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-12-23 17:07:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:07:21,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 17:07:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:21,057 INFO L225 Difference]: With dead ends: 102 [2020-12-23 17:07:21,057 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 17:07:21,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:07:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 17:07:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 52. [2020-12-23 17:07:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 17:07:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-23 17:07:21,074 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 8 [2020-12-23 17:07:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:21,074 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-23 17:07:21,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:07:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-23 17:07:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 17:07:21,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:21,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:21,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:21,282 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1213292751, now seen corresponding path program 1 times [2020-12-23 17:07:21,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:21,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275953686] [2020-12-23 17:07:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:21,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275953686] [2020-12-23 17:07:21,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:21,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:07:21,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196175572] [2020-12-23 17:07:21,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:07:21,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:21,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:07:21,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:07:21,353 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 4 states. [2020-12-23 17:07:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:21,407 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-23 17:07:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:07:21,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 17:07:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:21,412 INFO L225 Difference]: With dead ends: 49 [2020-12-23 17:07:21,412 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 17:07:21,413 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 [2020-12-23 17:07:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 17:07:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 17:07:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 17:07:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-23 17:07:21,425 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 9 [2020-12-23 17:07:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:21,426 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-23 17:07:21,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:07:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-23 17:07:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 17:07:21,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:21,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:21,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 17:07:21,427 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1213292752, now seen corresponding path program 1 times [2020-12-23 17:07:21,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:21,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630572181] [2020-12-23 17:07:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:21,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630572181] [2020-12-23 17:07:21,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:21,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 17:07:21,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207566792] [2020-12-23 17:07:21,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:07:21,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:07:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:21,618 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 6 states. [2020-12-23 17:07:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:21,805 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-23 17:07:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:07:21,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 17:07:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:21,807 INFO L225 Difference]: With dead ends: 92 [2020-12-23 17:07:21,808 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 17:07:21,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 17:07:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2020-12-23 17:07:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 17:07:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-12-23 17:07:21,815 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 9 [2020-12-23 17:07:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:21,815 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-12-23 17:07:21,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:07:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-12-23 17:07:21,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 17:07:21,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:21,816 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:21,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 17:07:21,817 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:21,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1626816779, now seen corresponding path program 1 times [2020-12-23 17:07:21,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:21,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176429486] [2020-12-23 17:07:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:21,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176429486] [2020-12-23 17:07:21,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270929381] [2020-12-23 17:07:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 17:07:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:22,045 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:22,046 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:22,048 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:22,060 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:22,068 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:22,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-23 17:07:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:22,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:07:22,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-12-23 17:07:22,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356126525] [2020-12-23 17:07:22,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:07:22,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:22,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:07:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:07:22,183 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 6 states. [2020-12-23 17:07:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:22,461 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-12-23 17:07:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:07:22,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 17:07:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:22,465 INFO L225 Difference]: With dead ends: 98 [2020-12-23 17:07:22,465 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 17:07:22,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:07:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 17:07:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2020-12-23 17:07:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 17:07:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-23 17:07:22,490 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 11 [2020-12-23 17:07:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:22,490 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-23 17:07:22,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:07:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-23 17:07:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 17:07:22,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:22,491 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:22,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:22,707 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1240415274, now seen corresponding path program 1 times [2020-12-23 17:07:22,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:22,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531067699] [2020-12-23 17:07:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:22,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531067699] [2020-12-23 17:07:22,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116183466] [2020-12-23 17:07:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:07:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:22,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:07:22,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-23 17:07:22,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770723975] [2020-12-23 17:07:22,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:07:22,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:22,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:07:22,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:07:22,937 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 5 states. [2020-12-23 17:07:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:23,030 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2020-12-23 17:07:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:07:23,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-23 17:07:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:23,032 INFO L225 Difference]: With dead ends: 91 [2020-12-23 17:07:23,033 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 17:07:23,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:07:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 17:07:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2020-12-23 17:07:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 17:07:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-12-23 17:07:23,049 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 12 [2020-12-23 17:07:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:23,049 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-12-23 17:07:23,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:07:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-12-23 17:07:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:07:23,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:23,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:23,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:23,267 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1961777546, now seen corresponding path program 1 times [2020-12-23 17:07:23,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:23,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801043105] [2020-12-23 17:07:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:23,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801043105] [2020-12-23 17:07:23,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:23,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:07:23,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477474088] [2020-12-23 17:07:23,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:07:23,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:23,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:07:23,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:07:23,342 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 4 states. [2020-12-23 17:07:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:23,406 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-23 17:07:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:07:23,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 17:07:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:23,407 INFO L225 Difference]: With dead ends: 58 [2020-12-23 17:07:23,407 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 17:07:23,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:07:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 17:07:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 17:07:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 17:07:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-23 17:07:23,426 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 14 [2020-12-23 17:07:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:23,426 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-23 17:07:23,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:07:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-23 17:07:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:07:23,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:23,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:23,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 17:07:23,428 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:23,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1961777547, now seen corresponding path program 1 times [2020-12-23 17:07:23,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:23,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843668905] [2020-12-23 17:07:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:23,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843668905] [2020-12-23 17:07:23,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:23,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 17:07:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093253362] [2020-12-23 17:07:23,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:07:23,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:07:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:23,559 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 6 states. [2020-12-23 17:07:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:23,654 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-23 17:07:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:07:23,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 17:07:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:23,656 INFO L225 Difference]: With dead ends: 75 [2020-12-23 17:07:23,656 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 17:07:23,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 17:07:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-12-23 17:07:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 17:07:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-12-23 17:07:23,663 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 14 [2020-12-23 17:07:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:23,663 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-12-23 17:07:23,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:07:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-12-23 17:07:23,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:07:23,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:23,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:23,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 17:07:23,665 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:23,666 INFO L82 PathProgramCache]: Analyzing trace with hash 87668155, now seen corresponding path program 1 times [2020-12-23 17:07:23,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:23,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743374284] [2020-12-23 17:07:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:23,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743374284] [2020-12-23 17:07:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968473081] [2020-12-23 17:07:23,829 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 17:07:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:23,958 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:23,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:23,961 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:23,971 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:23,976 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:23,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-23 17:07:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:24,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:24,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 17:07:24,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094720089] [2020-12-23 17:07:24,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 17:07:24,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:24,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 17:07:24,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:07:24,091 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 12 states. [2020-12-23 17:07:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:24,424 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2020-12-23 17:07:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:07:24,426 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-23 17:07:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:24,427 INFO L225 Difference]: With dead ends: 110 [2020-12-23 17:07:24,427 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 17:07:24,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:07:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 17:07:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 64. [2020-12-23 17:07:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 17:07:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-12-23 17:07:24,431 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 14 [2020-12-23 17:07:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:24,431 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-12-23 17:07:24,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 17:07:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-12-23 17:07:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:07:24,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:24,432 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:24,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:24,646 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash 381862667, now seen corresponding path program 2 times [2020-12-23 17:07:24,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:24,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194195745] [2020-12-23 17:07:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:24,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194195745] [2020-12-23 17:07:24,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178459456] [2020-12-23 17:07:24,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:24,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:07:24,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:07:24,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:07:24,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:24,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:24,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-23 17:07:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026044103] [2020-12-23 17:07:24,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:07:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:07:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:07:24,943 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 11 states. [2020-12-23 17:07:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:25,131 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-12-23 17:07:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 17:07:25,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-12-23 17:07:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:25,133 INFO L225 Difference]: With dead ends: 120 [2020-12-23 17:07:25,137 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 17:07:25,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:07:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 17:07:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2020-12-23 17:07:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 17:07:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-12-23 17:07:25,143 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 17 [2020-12-23 17:07:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:25,144 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-12-23 17:07:25,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:07:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-12-23 17:07:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 17:07:25,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:25,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:25,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 17:07:25,367 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1002405181, now seen corresponding path program 1 times [2020-12-23 17:07:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:25,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590950870] [2020-12-23 17:07:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:25,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590950870] [2020-12-23 17:07:25,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:25,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:07:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384415647] [2020-12-23 17:07:25,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:07:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:07:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:07:25,428 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 3 states. [2020-12-23 17:07:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:25,447 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-12-23 17:07:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:07:25,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 17:07:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:25,451 INFO L225 Difference]: With dead ends: 79 [2020-12-23 17:07:25,451 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 17:07:25,451 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 [2020-12-23 17:07:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 17:07:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-23 17:07:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 17:07:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-12-23 17:07:25,456 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 18 [2020-12-23 17:07:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:25,456 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-12-23 17:07:25,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:07:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-12-23 17:07:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 17:07:25,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:25,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:25,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 17:07:25,458 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:25,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1897750454, now seen corresponding path program 1 times [2020-12-23 17:07:25,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:25,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874558064] [2020-12-23 17:07:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 17:07:25,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874558064] [2020-12-23 17:07:25,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240027938] [2020-12-23 17:07:25,624 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:25,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 17:07:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:25,770 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:25,771 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:25,773 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:25,789 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:25,803 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:25,803 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-23 17:07:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 17:07:25,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:07:25,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-12-23 17:07:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848900287] [2020-12-23 17:07:25,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:07:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:07:25,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:07:25,931 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 7 states. [2020-12-23 17:07:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:26,172 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-12-23 17:07:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:07:26,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 17:07:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:26,174 INFO L225 Difference]: With dead ends: 91 [2020-12-23 17:07:26,174 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 17:07:26,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-23 17:07:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 17:07:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-12-23 17:07:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 17:07:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-12-23 17:07:26,177 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 19 [2020-12-23 17:07:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:26,178 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-12-23 17:07:26,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:07:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-12-23 17:07:26,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 17:07:26,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:26,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:26,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:26,393 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash -951175098, now seen corresponding path program 3 times [2020-12-23 17:07:26,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:26,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454307070] [2020-12-23 17:07:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:26,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454307070] [2020-12-23 17:07:26,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349711236] [2020-12-23 17:07:26,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:26,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:07:26,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:07:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 17:07:26,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:26,670 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:26,671 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:26,673 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:26,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:26,684 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:26,684 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-12-23 17:07:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 17:07:26,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:26,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2020-12-23 17:07:26,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436646925] [2020-12-23 17:07:26,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 17:07:26,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:26,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 17:07:26,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:07:26,821 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 14 states. [2020-12-23 17:07:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:27,458 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-12-23 17:07:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 17:07:27,459 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-12-23 17:07:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:27,460 INFO L225 Difference]: With dead ends: 118 [2020-12-23 17:07:27,461 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 17:07:27,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-23 17:07:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 17:07:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2020-12-23 17:07:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 17:07:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 17:07:27,471 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 19 [2020-12-23 17:07:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:27,471 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 17:07:27,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 17:07:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 17:07:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 17:07:27,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:27,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:27,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 17:07:27,688 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1225347953, now seen corresponding path program 1 times [2020-12-23 17:07:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:27,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534638726] [2020-12-23 17:07:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:27,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534638726] [2020-12-23 17:07:27,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:27,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 17:07:27,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405926549] [2020-12-23 17:07:27,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:07:27,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:27,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:07:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:07:27,877 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 7 states. [2020-12-23 17:07:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:28,045 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-12-23 17:07:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:07:28,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 17:07:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:28,047 INFO L225 Difference]: With dead ends: 88 [2020-12-23 17:07:28,047 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 17:07:28,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:07:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 17:07:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2020-12-23 17:07:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 17:07:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-12-23 17:07:28,051 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 20 [2020-12-23 17:07:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:28,051 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-12-23 17:07:28,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:07:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-12-23 17:07:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 17:07:28,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:28,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:28,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 17:07:28,052 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash -254750635, now seen corresponding path program 1 times [2020-12-23 17:07:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:28,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266387892] [2020-12-23 17:07:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:28,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266387892] [2020-12-23 17:07:28,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:28,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:07:28,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27204708] [2020-12-23 17:07:28,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:07:28,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:28,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:07:28,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:07:28,092 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 3 states. [2020-12-23 17:07:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:28,112 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-23 17:07:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:07:28,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-23 17:07:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:28,114 INFO L225 Difference]: With dead ends: 76 [2020-12-23 17:07:28,114 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 17:07:28,114 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 [2020-12-23 17:07:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 17:07:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-23 17:07:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 17:07:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 17:07:28,118 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 21 [2020-12-23 17:07:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:28,118 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 17:07:28,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:07:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 17:07:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 17:07:28,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:28,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:28,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 17:07:28,119 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:28,120 INFO L82 PathProgramCache]: Analyzing trace with hash 692665025, now seen corresponding path program 1 times [2020-12-23 17:07:28,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:28,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156976693] [2020-12-23 17:07:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:28,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156976693] [2020-12-23 17:07:28,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:28,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:07:28,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817754984] [2020-12-23 17:07:28,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:07:28,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:07:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:07:28,160 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 4 states. [2020-12-23 17:07:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:28,192 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-23 17:07:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:07:28,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-23 17:07:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:28,194 INFO L225 Difference]: With dead ends: 75 [2020-12-23 17:07:28,194 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 17:07:28,194 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 [2020-12-23 17:07:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 17:07:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 17:07:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 17:07:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-12-23 17:07:28,196 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 22 [2020-12-23 17:07:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:28,196 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-12-23 17:07:28,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:07:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-12-23 17:07:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 17:07:28,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:28,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:28,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 17:07:28,198 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash -548026254, now seen corresponding path program 1 times [2020-12-23 17:07:28,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:28,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150715925] [2020-12-23 17:07:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 17:07:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150715925] [2020-12-23 17:07:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373552899] [2020-12-23 17:07:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:07:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 17:07:28,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:28,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-12-23 17:07:28,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726228842] [2020-12-23 17:07:28,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:07:28,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:07:28,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:07:28,462 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 11 states. [2020-12-23 17:07:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:28,691 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-12-23 17:07:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:07:28,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-23 17:07:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:28,692 INFO L225 Difference]: With dead ends: 101 [2020-12-23 17:07:28,692 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 17:07:28,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:07:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 17:07:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2020-12-23 17:07:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 17:07:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-12-23 17:07:28,696 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 23 [2020-12-23 17:07:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:28,696 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-12-23 17:07:28,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:07:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-12-23 17:07:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 17:07:28,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:28,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:28,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:28,911 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:28,912 INFO L82 PathProgramCache]: Analyzing trace with hash -68838012, now seen corresponding path program 1 times [2020-12-23 17:07:28,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:28,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026912692] [2020-12-23 17:07:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 17:07:29,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026912692] [2020-12-23 17:07:29,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:07:29,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 17:07:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24452880] [2020-12-23 17:07:29,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:07:29,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:07:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:07:29,155 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 6 states. [2020-12-23 17:07:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:29,320 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-23 17:07:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:07:29,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-12-23 17:07:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:29,321 INFO L225 Difference]: With dead ends: 76 [2020-12-23 17:07:29,321 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 17:07:29,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:07:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 17:07:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 17:07:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 17:07:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-12-23 17:07:29,325 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 24 [2020-12-23 17:07:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:29,325 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-12-23 17:07:29,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:07:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-12-23 17:07:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 17:07:29,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:29,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:29,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 17:07:29,326 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:29,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:29,327 INFO L82 PathProgramCache]: Analyzing trace with hash -119563092, now seen corresponding path program 1 times [2020-12-23 17:07:29,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:29,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280400360] [2020-12-23 17:07:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 17:07:29,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280400360] [2020-12-23 17:07:29,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482793372] [2020-12-23 17:07:29,484 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:29,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 17:07:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:29,608 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:29,608 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:29,610 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:29,621 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:29,629 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:29,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-23 17:07:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 17:07:29,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:29,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-12-23 17:07:29,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249773933] [2020-12-23 17:07:29,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 17:07:29,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 17:07:29,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-23 17:07:29,816 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 15 states. [2020-12-23 17:07:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:30,263 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-12-23 17:07:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 17:07:30,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-12-23 17:07:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:30,265 INFO L225 Difference]: With dead ends: 63 [2020-12-23 17:07:30,265 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 17:07:30,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-12-23 17:07:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 17:07:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-12-23 17:07:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 17:07:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-12-23 17:07:30,268 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 27 [2020-12-23 17:07:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:30,268 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-12-23 17:07:30,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 17:07:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-12-23 17:07:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 17:07:30,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:30,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:30,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:30,479 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:30,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2041431761, now seen corresponding path program 1 times [2020-12-23 17:07:30,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:30,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348084407] [2020-12-23 17:07:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:31,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348084407] [2020-12-23 17:07:31,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852434130] [2020-12-23 17:07:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:31,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 17:07:31,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:31,296 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 17:07:31,299 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:31,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:31,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:07:31,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 17:07:31,353 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 17:07:31,354 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:31,363 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:31,364 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:07:31,364 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 17:07:31,412 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 17:07:31,414 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:31,427 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:31,429 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:31,429 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2020-12-23 17:07:31,521 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:31,522 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2020-12-23 17:07:31,527 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:31,585 INFO L625 ElimStorePlain]: treesize reduction 28, result has 60.6 percent of original size [2020-12-23 17:07:31,593 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:31,593 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:47, output treesize:43 [2020-12-23 17:07:31,851 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:31,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 78 [2020-12-23 17:07:31,855 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:31,902 INFO L625 ElimStorePlain]: treesize reduction 44, result has 53.2 percent of original size [2020-12-23 17:07:31,910 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:31,911 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:50 [2020-12-23 17:07:32,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:07:32,144 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 17:07:32,172 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:32,173 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 81 treesize of output 64 [2020-12-23 17:07:32,176 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:32,201 INFO L625 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2020-12-23 17:07:32,204 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:07:32,204 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:91, output treesize:10 [2020-12-23 17:07:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:32,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:32,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2020-12-23 17:07:32,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887314986] [2020-12-23 17:07:32,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 17:07:32,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:32,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 17:07:32,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-12-23 17:07:32,249 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 22 states. [2020-12-23 17:07:33,708 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-12-23 17:07:33,894 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2020-12-23 17:07:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:33,972 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-23 17:07:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 17:07:33,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-12-23 17:07:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:33,976 INFO L225 Difference]: With dead ends: 57 [2020-12-23 17:07:33,976 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 17:07:33,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 17:07:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 17:07:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 17:07:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 17:07:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 17:07:33,979 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 28 [2020-12-23 17:07:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:33,979 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 17:07:33,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 17:07:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 17:07:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 17:07:33,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:33,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:34,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:34,195 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1376195477, now seen corresponding path program 2 times [2020-12-23 17:07:34,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:34,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220529005] [2020-12-23 17:07:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 17:07:34,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220529005] [2020-12-23 17:07:34,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513751586] [2020-12-23 17:07:34,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:34,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:07:34,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:07:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:07:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 17:07:34,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:34,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-23 17:07:34,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903295807] [2020-12-23 17:07:34,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 17:07:34,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 17:07:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:07:34,488 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-12-23 17:07:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:34,601 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-12-23 17:07:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:07:34,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-12-23 17:07:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:34,602 INFO L225 Difference]: With dead ends: 70 [2020-12-23 17:07:34,602 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 17:07:34,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:07:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 17:07:34,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-12-23 17:07:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 17:07:34,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-12-23 17:07:34,606 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 30 [2020-12-23 17:07:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:34,606 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-12-23 17:07:34,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 17:07:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-12-23 17:07:34,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 17:07:34,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:34,607 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:34,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 17:07:34,821 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:34,822 INFO L82 PathProgramCache]: Analyzing trace with hash -493809904, now seen corresponding path program 3 times [2020-12-23 17:07:34,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:34,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547963413] [2020-12-23 17:07:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:07:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547963413] [2020-12-23 17:07:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854503011] [2020-12-23 17:07:34,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:34,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:07:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:07:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 17:07:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:35,017 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-23 17:07:35,018 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-23 17:07:35,019 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:35,028 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:35,029 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:35,030 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-12-23 17:07:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 17:07:35,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:35,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2020-12-23 17:07:35,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696787944] [2020-12-23 17:07:35,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 17:07:35,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:35,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 17:07:35,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:07:35,159 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 14 states. [2020-12-23 17:07:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:35,851 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-12-23 17:07:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 17:07:35,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-12-23 17:07:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:35,852 INFO L225 Difference]: With dead ends: 74 [2020-12-23 17:07:35,852 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 17:07:35,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2020-12-23 17:07:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 17:07:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-12-23 17:07:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 17:07:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-12-23 17:07:35,857 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 32 [2020-12-23 17:07:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:35,857 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-12-23 17:07:35,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 17:07:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-12-23 17:07:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 17:07:35,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:35,858 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:36,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 17:07:36,072 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2126397797, now seen corresponding path program 2 times [2020-12-23 17:07:36,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:36,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815136135] [2020-12-23 17:07:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:37,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815136135] [2020-12-23 17:07:37,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75952749] [2020-12-23 17:07:37,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:37,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:07:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:07:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 17:07:37,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:37,487 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 17:07:37,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:37,501 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:37,503 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:07:37,503 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 17:07:37,562 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 17:07:37,563 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:37,576 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:37,577 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:07:37,577 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 17:07:37,637 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 17:07:37,639 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:37,653 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:37,654 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:37,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2020-12-23 17:07:37,745 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:37,746 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2020-12-23 17:07:37,749 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:37,790 INFO L625 ElimStorePlain]: treesize reduction 28, result has 60.6 percent of original size [2020-12-23 17:07:37,792 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:37,792 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:43 [2020-12-23 17:07:37,888 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:37,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2020-12-23 17:07:37,892 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:37,931 INFO L625 ElimStorePlain]: treesize reduction 28, result has 60.6 percent of original size [2020-12-23 17:07:37,935 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:37,936 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:47, output treesize:43 [2020-12-23 17:07:42,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:07:42,215 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:42,215 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 66 [2020-12-23 17:07:42,218 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:42,277 INFO L625 ElimStorePlain]: treesize reduction 28, result has 67.1 percent of original size [2020-12-23 17:07:42,286 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:42,286 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:61, output treesize:57 [2020-12-23 17:07:44,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:07:44,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:07:44,558 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:44,559 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 74 [2020-12-23 17:07:44,562 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:44,612 INFO L625 ElimStorePlain]: treesize reduction 28, result has 67.8 percent of original size [2020-12-23 17:07:44,616 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:44,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:63, output treesize:59 [2020-12-23 17:07:46,886 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:46,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 72 [2020-12-23 17:07:46,890 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:46,913 INFO L625 ElimStorePlain]: treesize reduction 27, result has 34.1 percent of original size [2020-12-23 17:07:46,914 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:07:46,915 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:93, output treesize:10 [2020-12-23 17:07:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 17:07:46,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:07:46,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2020-12-23 17:07:47,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765961251] [2020-12-23 17:07:47,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 17:07:47,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:07:47,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 17:07:47,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=772, Unknown=2, NotChecked=0, Total=870 [2020-12-23 17:07:47,002 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 30 states. [2020-12-23 17:07:48,065 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-12-23 17:07:49,059 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 39 [2020-12-23 17:07:49,251 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-12-23 17:07:49,479 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-12-23 17:07:49,702 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2020-12-23 17:07:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:07:49,788 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-12-23 17:07:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 17:07:49,788 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 36 [2020-12-23 17:07:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:07:49,789 INFO L225 Difference]: With dead ends: 69 [2020-12-23 17:07:49,789 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 17:07:49,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=329, Invalid=1831, Unknown=2, NotChecked=0, Total=2162 [2020-12-23 17:07:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 17:07:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 17:07:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 17:07:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-23 17:07:49,793 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2020-12-23 17:07:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:07:49,794 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-23 17:07:49,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 17:07:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-23 17:07:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 17:07:49,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:07:49,795 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:07:50,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 17:07:50,009 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 17:07:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:07:50,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1858645957, now seen corresponding path program 3 times [2020-12-23 17:07:50,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:07:50,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732666352] [2020-12-23 17:07:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:07:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:07:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:07:51,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732666352] [2020-12-23 17:07:51,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513224072] [2020-12-23 17:07:51,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:07:51,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 17:07:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:07:51,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 17:07:51,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:07:51,639 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 17:07:51,643 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:51,654 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:51,656 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:07:51,656 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 17:07:51,712 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 17:07:51,713 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:51,723 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:51,724 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:07:51,724 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-12-23 17:07:51,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 17:07:51,779 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:51,791 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:51,793 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:51,793 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:29 [2020-12-23 17:07:51,890 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:51,891 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2020-12-23 17:07:51,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:51,935 INFO L625 ElimStorePlain]: treesize reduction 28, result has 58.8 percent of original size [2020-12-23 17:07:51,937 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:51,937 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:40 [2020-12-23 17:07:52,025 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:52,025 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2020-12-23 17:07:52,027 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:52,064 INFO L625 ElimStorePlain]: treesize reduction 28, result has 58.8 percent of original size [2020-12-23 17:07:52,065 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:52,066 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:40 [2020-12-23 17:07:52,153 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:52,153 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2020-12-23 17:07:52,159 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:52,197 INFO L625 ElimStorePlain]: treesize reduction 28, result has 58.8 percent of original size [2020-12-23 17:07:52,201 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:52,201 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:40 [2020-12-23 17:07:58,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:07:58,536 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:07:58,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 66 [2020-12-23 17:07:58,543 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:07:58,587 INFO L625 ElimStorePlain]: treesize reduction 28, result has 67.8 percent of original size [2020-12-23 17:07:58,590 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 17:07:58,591 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:59 [2020-12-23 17:08:06,727 WARN L197 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-23 17:08:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:08:06,825 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:08:06,825 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 140 [2020-12-23 17:08:06,830 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:08:06,904 INFO L625 ElimStorePlain]: treesize reduction 52, result has 57.4 percent of original size [2020-12-23 17:08:06,909 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 17:08:06,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:74, output treesize:70 [2020-12-23 17:08:09,741 WARN L197 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-23 17:08:23,076 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-23 17:08:30,168 WARN L197 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 17:08:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:08:30,282 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:08:30,283 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 218 [2020-12-23 17:08:30,289 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:08:30,412 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 17:08:30,413 INFO L625 ElimStorePlain]: treesize reduction 80, result has 53.2 percent of original size [2020-12-23 17:08:30,421 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2020-12-23 17:08:30,421 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:95, output treesize:91 [2020-12-23 17:08:34,460 WARN L197 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-23 17:08:39,384 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 17:08:45,800 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:08:45,800 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 84 [2020-12-23 17:08:45,805 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:08:45,833 INFO L625 ElimStorePlain]: treesize reduction 21, result has 50.0 percent of original size [2020-12-23 17:08:45,836 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:08:45,836 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:97, output treesize:7 [2020-12-23 17:08:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 17:08:45,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:08:45,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2020-12-23 17:08:45,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630838865] [2020-12-23 17:08:45,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 17:08:45,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:08:45,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 17:08:45,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1201, Unknown=17, NotChecked=0, Total=1406 [2020-12-23 17:08:45,909 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 38 states. [2020-12-23 17:08:52,076 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-12-23 17:08:52,327 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-12-23 17:08:56,402 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-12-23 17:08:56,639 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-12-23 17:08:56,904 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 39 [2020-12-23 17:08:57,429 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 46 [2020-12-23 17:08:57,632 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2020-12-23 17:08:57,958 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 38 [2020-12-23 17:08:58,201 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-12-23 17:09:00,478 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 41 [2020-12-23 17:09:00,694 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-12-23 17:09:01,786 WARN L197 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 40 [2020-12-23 17:09:02,045 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 43 [2020-12-23 17:09:04,267 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 96 DAG size of output: 43 [2020-12-23 17:09:04,526 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2020-12-23 17:09:04,799 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 48 [2020-12-23 17:09:11,394 WARN L197 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-23 17:09:15,692 WARN L197 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-12-23 17:09:15,977 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2020-12-23 17:09:19,765 WARN L197 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2020-12-23 17:09:20,657 WARN L197 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2020-12-23 17:09:21,308 WARN L197 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2020-12-23 17:09:21,598 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-12-23 17:09:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:09:21,600 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-12-23 17:09:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 17:09:21,600 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 44 [2020-12-23 17:09:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:09:21,600 INFO L225 Difference]: With dead ends: 62 [2020-12-23 17:09:21,600 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 17:09:21,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 88.6s TimeCoverageRelationStatistics Valid=1138, Invalid=4540, Unknown=22, NotChecked=0, Total=5700 [2020-12-23 17:09:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 17:09:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 17:09:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 17:09:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 17:09:21,603 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2020-12-23 17:09:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:09:21,604 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 17:09:21,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 17:09:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 17:09:21,604 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 17:09:21,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:09:21,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:09:21 BoogieIcfgContainer [2020-12-23 17:09:21,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:09:21,814 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:09:21,814 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:09:21,815 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:09:21,815 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:07:19" (3/4) ... [2020-12-23 17:09:21,820 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 17:09:21,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 17:09:21,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 17:09:21,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 17:09:21,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 17:09:21,913 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-ext-properties/960521-1_1-2.i-witness.graphml [2020-12-23 17:09:21,914 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:09:21,917 INFO L168 Benchmark]: Toolchain (without parser) took 124609.02 ms. Allocated memory was 153.1 MB in the beginning and 335.5 MB in the end (delta: 182.5 MB). Free memory was 126.9 MB in the beginning and 262.4 MB in the end (delta: -135.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 8.0 GB. [2020-12-23 17:09:21,918 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 153.1 MB. Free memory is still 126.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:09:21,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 812.49 ms. Allocated memory is still 153.1 MB. Free memory was 126.7 MB in the beginning and 105.3 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:09:21,918 INFO L168 Benchmark]: Boogie Procedure Inliner took 141.27 ms. Allocated memory is still 153.1 MB. Free memory was 105.3 MB in the beginning and 103.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:09:21,921 INFO L168 Benchmark]: Boogie Preprocessor took 89.85 ms. Allocated memory is still 153.1 MB. Free memory was 103.4 MB in the beginning and 102.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:09:21,922 INFO L168 Benchmark]: RCFGBuilder took 1067.69 ms. Allocated memory is still 153.1 MB. Free memory was 102.0 MB in the beginning and 116.6 MB in the end (delta: -14.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 8.0 GB. [2020-12-23 17:09:21,922 INFO L168 Benchmark]: TraceAbstraction took 122383.66 ms. Allocated memory was 153.1 MB in the beginning and 335.5 MB in the end (delta: 182.5 MB). Free memory was 116.1 MB in the beginning and 265.3 MB in the end (delta: -149.3 MB). Peak memory consumption was 33.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:09:21,923 INFO L168 Benchmark]: Witness Printer took 99.51 ms. Allocated memory is still 335.5 MB. Free memory was 265.3 MB in the beginning and 262.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:09:21,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 153.1 MB. Free memory is still 126.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 812.49 ms. Allocated memory is still 153.1 MB. Free memory was 126.7 MB in the beginning and 105.3 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 141.27 ms. Allocated memory is still 153.1 MB. Free memory was 105.3 MB in the beginning and 103.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 89.85 ms. Allocated memory is still 153.1 MB. Free memory was 103.4 MB in the beginning and 102.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1067.69 ms. Allocated memory is still 153.1 MB. Free memory was 102.0 MB in the beginning and 116.6 MB in the end (delta: -14.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 122383.66 ms. Allocated memory was 153.1 MB in the beginning and 335.5 MB in the end (delta: 182.5 MB). Free memory was 116.1 MB in the beginning and 265.3 MB in the end (delta: -149.3 MB). Peak memory consumption was 33.4 MB. Max. memory is 8.0 GB. * Witness Printer took 99.51 ms. Allocated memory is still 335.5 MB. Free memory was 265.3 MB in the beginning and 262.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 534]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 23 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 56 locations, 23 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 122.2s, OverallIterations: 26, TraceHistogramMax: 4, AutomataDifference: 44.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 900 SDtfs, 2411 SDslu, 1777 SDs, 0 SdLazy, 3755 SolverSat, 568 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 616 GetRequests, 263 SyntacticMatches, 20 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 105.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred 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: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 407 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 72.0s InterpolantComputationTime, 808 NumberOfCodeBlocks, 790 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 768 ConstructedInterpolants, 54 QuantifiedInterpolants, 313701 SizeOfPredicates, 92 NumberOfNonLiveVariables, 1536 ConjunctsInSsa, 222 ConjunctsInUnsatCore, 40 InterpolantComputations, 16 PerfectInterpolantSequences, 218/407 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 correct! Received shutdown request...