/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:53:23,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:53:23,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:53:23,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:53:23,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:53:23,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:53:23,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:53:23,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:53:23,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:53:23,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:53:23,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:53:23,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:53:23,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:53:23,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:53:23,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:53:23,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:53:23,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:53:23,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:53:23,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:53:23,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:53:23,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:53:23,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:53:23,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:53:23,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:53:23,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:53:23,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:53:23,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:53:23,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:53:23,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:53:23,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:53:23,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:53:23,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:53:23,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:53:23,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:53:23,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:53:23,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:53:23,359 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 16:53:23,408 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:53:23,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:53:23,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:53:23,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:53:23,414 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:53:23,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:53:23,415 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:53:23,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:53:23,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:53:23,415 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:53:23,417 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:53:23,417 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:53:23,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:53:23,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:53:23,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:53:23,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:53:23,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:53:23,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:53:23,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:53:23,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:53:23,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:53:23,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:53:23,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:53:23,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:53:23,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:53:23,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:53:23,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:53:23,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:53:23,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:53:23,873 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:53:23,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2020-12-23 16:53:23,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b187c5eb9/e7d4c1cd6f0c4adfa913d223df1399c5/FLAG331eb763f [2020-12-23 16:53:24,613 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:53:24,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2020-12-23 16:53:24,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b187c5eb9/e7d4c1cd6f0c4adfa913d223df1399c5/FLAG331eb763f [2020-12-23 16:53:24,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b187c5eb9/e7d4c1cd6f0c4adfa913d223df1399c5 [2020-12-23 16:53:24,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:53:24,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:53:24,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:24,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:53:24,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:53:24,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:24" (1/1) ... [2020-12-23 16:53:24,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155f9b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:24, skipping insertion in model container [2020-12-23 16:53:24,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:24" (1/1) ... [2020-12-23 16:53:24,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:53:25,026 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~spanp~0,] left hand side expression in assignment: lhs: VariableLHS[~sc~0,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~length2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],IdentifierExpression[~i~1,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length2~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:25,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:25,461 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~spanp~0,] left hand side expression in assignment: lhs: VariableLHS[~sc~0,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~length2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],IdentifierExpression[~i~1,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length2~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:25,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:25,572 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:53:25,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25 WrapperNode [2020-12-23 16:53:25,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:25,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:25,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:53:25,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:53:25,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:25,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:53:25,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:53:25,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:53:25,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... [2020-12-23 16:53:25,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:53:25,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:53:25,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:53:25,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:53:25,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:53:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:53:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:53:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:53:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:53:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:53:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:53:26,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:53:26,338 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 16:53:26,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:26 BoogieIcfgContainer [2020-12-23 16:53:26,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:53:26,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:53:26,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:53:26,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:53:26,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:53:24" (1/3) ... [2020-12-23 16:53:26,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a8be17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:26, skipping insertion in model container [2020-12-23 16:53:26,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:25" (2/3) ... [2020-12-23 16:53:26,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a8be17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:26, skipping insertion in model container [2020-12-23 16:53:26,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:26" (3/3) ... [2020-12-23 16:53:26,352 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2020-12-23 16:53:26,361 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:53:26,367 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-12-23 16:53:26,389 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-12-23 16:53:26,414 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:53:26,414 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:53:26,414 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:53:26,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:53:26,415 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:53:26,415 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:53:26,415 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:53:26,415 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:53:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-12-23 16:53:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:26,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:26,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:26,473 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:26,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-23 16:53:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:26,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912747091] [2020-12-23 16:53:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:26,735 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 16:53:26,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912747091] [2020-12-23 16:53:26,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:26,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:26,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178615831] [2020-12-23 16:53:26,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:26,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:26,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:26,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:26,766 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-12-23 16:53:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:26,828 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-12-23 16:53:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:26,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:53:26,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:26,847 INFO L225 Difference]: With dead ends: 78 [2020-12-23 16:53:26,847 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:53:26,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:53:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2020-12-23 16:53:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:53:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-12-23 16:53:26,893 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2020-12-23 16:53:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:26,893 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-12-23 16:53:26,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-12-23 16:53:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:26,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:26,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:26,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:53:26,895 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-23 16:53:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:26,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774457851] [2020-12-23 16:53:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:26,966 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 16:53:26,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774457851] [2020-12-23 16:53:26,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:26,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:26,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284529862] [2020-12-23 16:53:26,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:26,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:26,979 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 3 states. [2020-12-23 16:53:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,052 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-23 16:53:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:27,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:53:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,056 INFO L225 Difference]: With dead ends: 42 [2020-12-23 16:53:27,057 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 16:53:27,057 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 16:53:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 16:53:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 16:53:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 16:53:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-23 16:53:27,073 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2020-12-23 16:53:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,073 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-23 16:53:27,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-23 16:53:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:27,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:53:27,076 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-23 16:53:27,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318091264] [2020-12-23 16:53:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,198 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 16:53:27,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318091264] [2020-12-23 16:53:27,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:27,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:27,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131749460] [2020-12-23 16:53:27,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:27,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:27,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:27,201 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 4 states. [2020-12-23 16:53:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,405 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-12-23 16:53:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:27,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:53:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,407 INFO L225 Difference]: With dead ends: 75 [2020-12-23 16:53:27,407 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:53:27,407 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 16:53:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:53:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2020-12-23 16:53:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:53:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-12-23 16:53:27,413 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2020-12-23 16:53:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,414 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-12-23 16:53:27,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-12-23 16:53:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:27,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:53:27,415 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,416 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-23 16:53:27,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31434271] [2020-12-23 16:53:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,474 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 16:53:27,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31434271] [2020-12-23 16:53:27,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:27,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:27,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75710819] [2020-12-23 16:53:27,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:27,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:27,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:27,477 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 4 states. [2020-12-23 16:53:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,525 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-12-23 16:53:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:27,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:53:27,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,527 INFO L225 Difference]: With dead ends: 43 [2020-12-23 16:53:27,527 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 16:53:27,527 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 16:53:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 16:53:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 16:53:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:53:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-23 16:53:27,532 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 9 [2020-12-23 16:53:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,532 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-23 16:53:27,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-23 16:53:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:27,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:53:27,534 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-12-23 16:53:27,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652315479] [2020-12-23 16:53:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,574 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 16:53:27,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652315479] [2020-12-23 16:53:27,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:27,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:27,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719557630] [2020-12-23 16:53:27,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:27,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:27,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:27,577 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 4 states. [2020-12-23 16:53:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,607 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-12-23 16:53:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:27,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:53:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,609 INFO L225 Difference]: With dead ends: 76 [2020-12-23 16:53:27,609 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 16:53:27,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 16:53:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2020-12-23 16:53:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 16:53:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-23 16:53:27,622 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 9 [2020-12-23 16:53:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,624 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-23 16:53:27,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:27,625 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-23 16:53:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:27,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:53:27,629 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-12-23 16:53:27,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920447672] [2020-12-23 16:53:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,700 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 16:53:27,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920447672] [2020-12-23 16:53:27,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:27,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664244381] [2020-12-23 16:53:27,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:27,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:27,703 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 3 states. [2020-12-23 16:53:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,750 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-23 16:53:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:27,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 16:53:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,752 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:53:27,752 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:53:27,753 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 16:53:27,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:53:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 16:53:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:53:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-23 16:53:27,758 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 9 [2020-12-23 16:53:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,759 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-23 16:53:27,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-23 16:53:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:27,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:53:27,760 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-23 16:53:27,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710295191] [2020-12-23 16:53:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,822 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 16:53:27,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710295191] [2020-12-23 16:53:27,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:27,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:27,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463050450] [2020-12-23 16:53:27,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:27,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:27,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:27,826 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 5 states. [2020-12-23 16:53:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,928 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-12-23 16:53:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:27,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 16:53:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,930 INFO L225 Difference]: With dead ends: 76 [2020-12-23 16:53:27,931 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 16:53:27,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 16:53:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2020-12-23 16:53:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 16:53:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-23 16:53:27,948 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2020-12-23 16:53:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,948 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-23 16:53:27,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-23 16:53:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:53:27,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:53:27,951 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,952 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-12-23 16:53:27,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948375587] [2020-12-23 16:53:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:28,053 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 16:53:28,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948375587] [2020-12-23 16:53:28,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:28,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:28,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755766181] [2020-12-23 16:53:28,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:28,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:28,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:28,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:28,058 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 4 states. [2020-12-23 16:53:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:28,097 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-12-23 16:53:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:28,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 16:53:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:28,098 INFO L225 Difference]: With dead ends: 53 [2020-12-23 16:53:28,099 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 16:53:28,099 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 16:53:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 16:53:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 16:53:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:53:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-12-23 16:53:28,113 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2020-12-23 16:53:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:28,114 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-12-23 16:53:28,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-12-23 16:53:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:28,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:28,118 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:28,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:53:28,118 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-23 16:53:28,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:28,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79190571] [2020-12-23 16:53:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:28,240 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 16:53:28,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79190571] [2020-12-23 16:53:28,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178485377] [2020-12-23 16:53:28,241 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 16:53:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:28,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:53:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:28,388 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_24|]} [2020-12-23 16:53:28,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:28,408 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2020-12-23 16:53:28,409 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:28,421 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:28,430 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 16:53:28,438 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:28,448 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:28,452 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:28,453 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:53:28,524 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 16:53:28,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:28,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:53:28,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544805685] [2020-12-23 16:53:28,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:28,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:28,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:28,527 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 6 states. [2020-12-23 16:53:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:28,668 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-12-23 16:53:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:28,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 16:53:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:28,670 INFO L225 Difference]: With dead ends: 85 [2020-12-23 16:53:28,670 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 16:53:28,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 16:53:28,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2020-12-23 16:53:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:53:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-23 16:53:28,675 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2020-12-23 16:53:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:28,675 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-23 16:53:28,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-23 16:53:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:28,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:28,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:28,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 16:53:28,891 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2020-12-23 16:53:28,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:28,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255886243] [2020-12-23 16:53:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:28,942 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 16:53:28,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255886243] [2020-12-23 16:53:28,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:28,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:28,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409862308] [2020-12-23 16:53:28,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:28,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:28,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:28,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:28,946 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2020-12-23 16:53:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:29,022 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-12-23 16:53:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:29,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 16:53:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:29,024 INFO L225 Difference]: With dead ends: 47 [2020-12-23 16:53:29,024 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 16:53:29,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 16:53:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 16:53:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:53:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 16:53:29,028 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2020-12-23 16:53:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:29,028 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 16:53:29,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 16:53:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:29,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:29,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:29,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:53:29,030 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2020-12-23 16:53:29,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:29,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956053129] [2020-12-23 16:53:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,105 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 16:53:29,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956053129] [2020-12-23 16:53:29,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:29,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:53:29,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856332686] [2020-12-23 16:53:29,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:29,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:29,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:29,108 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 7 states. [2020-12-23 16:53:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:29,253 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-12-23 16:53:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:29,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 16:53:29,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:29,254 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:53:29,255 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:53:29,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:53:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-23 16:53:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 16:53:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-23 16:53:29,263 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2020-12-23 16:53:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:29,263 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-23 16:53:29,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-23 16:53:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:29,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:29,264 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:29,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:53:29,265 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-23 16:53:29,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:29,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013314516] [2020-12-23 16:53:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,379 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 16:53:29,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013314516] [2020-12-23 16:53:29,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519508575] [2020-12-23 16:53:29,380 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 16:53:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:53:29,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:29,474 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,474 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 9 treesize of output 25 [2020-12-23 16:53:29,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,505 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:29,509 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,509 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:29,559 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 16:53:29,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:29,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 16:53:29,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042272092] [2020-12-23 16:53:29,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:29,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:29,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:29,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:29,561 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 7 states. [2020-12-23 16:53:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:29,657 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-12-23 16:53:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:29,658 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 16:53:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:29,658 INFO L225 Difference]: With dead ends: 70 [2020-12-23 16:53:29,659 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 16:53:29,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 16:53:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-12-23 16:53:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:53:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-23 16:53:29,662 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2020-12-23 16:53:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:29,662 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-23 16:53:29,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-23 16:53:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:53:29,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:29,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:29,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 16:53:29,875 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:29,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2020-12-23 16:53:29,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:29,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389160064] [2020-12-23 16:53:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,941 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 16:53:29,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389160064] [2020-12-23 16:53:29,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:29,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:29,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548877334] [2020-12-23 16:53:29,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:29,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:29,946 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-12-23 16:53:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:30,032 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-12-23 16:53:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:30,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-23 16:53:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:30,033 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:53:30,034 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 16:53:30,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 16:53:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-23 16:53:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 16:53:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-23 16:53:30,037 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2020-12-23 16:53:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:30,037 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-23 16:53:30,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-23 16:53:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:53:30,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:30,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:30,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 16:53:30,039 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:30,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2020-12-23 16:53:30,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:30,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807002024] [2020-12-23 16:53:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,160 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 16:53:30,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807002024] [2020-12-23 16:53:30,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:30,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:53:30,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630619611] [2020-12-23 16:53:30,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:30,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:30,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:30,165 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 8 states. [2020-12-23 16:53:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:30,276 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-12-23 16:53:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:30,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 16:53:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:30,279 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:53:30,279 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 16:53:30,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:53:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 16:53:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-12-23 16:53:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:53:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-23 16:53:30,282 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2020-12-23 16:53:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:30,282 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-23 16:53:30,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-23 16:53:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:53:30,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:30,288 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 16:53:30,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 16:53:30,288 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:30,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2020-12-23 16:53:30,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:30,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750145204] [2020-12-23 16:53:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,411 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 16:53:30,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750145204] [2020-12-23 16:53:30,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:30,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:30,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464648537] [2020-12-23 16:53:30,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:30,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:30,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:30,414 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 4 states. [2020-12-23 16:53:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:30,436 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-12-23 16:53:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:30,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-23 16:53:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:30,437 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:53:30,437 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 16:53:30,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:30,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 16:53:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 16:53:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:53:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-23 16:53:30,442 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2020-12-23 16:53:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:30,443 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-23 16:53:30,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-23 16:53:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:53:30,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:30,444 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:30,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 16:53:30,444 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2020-12-23 16:53:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:30,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903768548] [2020-12-23 16:53:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,595 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 16:53:30,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903768548] [2020-12-23 16:53:30,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:30,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 16:53:30,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251041557] [2020-12-23 16:53:30,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:53:30,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:53:30,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:30,597 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 10 states. [2020-12-23 16:53:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:30,786 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-12-23 16:53:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:53:30,787 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-23 16:53:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:30,787 INFO L225 Difference]: With dead ends: 53 [2020-12-23 16:53:30,787 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 16:53:30,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 16:53:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 16:53:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 16:53:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-23 16:53:30,790 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2020-12-23 16:53:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:30,790 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-23 16:53:30,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:53:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-23 16:53:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:53:30,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:30,791 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:30,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 16:53:30,791 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2020-12-23 16:53:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:30,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137887642] [2020-12-23 16:53:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,977 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 16:53:30,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137887642] [2020-12-23 16:53:30,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:30,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-23 16:53:30,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591646767] [2020-12-23 16:53:30,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 16:53:30,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 16:53:30,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:53:30,979 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 12 states. [2020-12-23 16:53:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:31,224 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-12-23 16:53:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:53:31,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-12-23 16:53:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:31,226 INFO L225 Difference]: With dead ends: 48 [2020-12-23 16:53:31,226 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 16:53:31,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:53:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 16:53:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-12-23 16:53:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 16:53:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-23 16:53:31,228 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2020-12-23 16:53:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:31,228 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-23 16:53:31,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 16:53:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-23 16:53:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:53:31,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:31,229 INFO L422 BasicCegarLoop]: trace histogram [2, 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 16:53:31,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 16:53:31,230 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:31,230 INFO L82 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2020-12-23 16:53:31,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:31,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615334770] [2020-12-23 16:53:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:31,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615334770] [2020-12-23 16:53:31,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009180231] [2020-12-23 16:53:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:53:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 16:53:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:31,500 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:31,502 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 9 treesize of output 25 [2020-12-23 16:53:31,506 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:31,525 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:31,529 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:31,529 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:31,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:31,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2020-12-23 16:53:31,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049171401] [2020-12-23 16:53:31,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:53:31,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:53:31,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:53:31,749 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 20 states. [2020-12-23 16:53:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:32,228 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-12-23 16:53:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:32,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-12-23 16:53:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:32,230 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:53:32,230 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 16:53:32,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:53:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 16:53:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-23 16:53:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 16:53:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-23 16:53:32,234 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2020-12-23 16:53:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:32,234 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-23 16:53:32,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:53:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-23 16:53:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:53:32,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:32,236 INFO L422 BasicCegarLoop]: trace histogram [2, 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 16:53:32,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:53:32,451 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:32,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:32,452 INFO L82 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2020-12-23 16:53:32,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:32,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17922950] [2020-12-23 16:53:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:32,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17922950] [2020-12-23 16:53:32,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:32,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 16:53:32,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117034412] [2020-12-23 16:53:32,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:53:32,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:32,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:53:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:32,601 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 10 states. [2020-12-23 16:53:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:32,816 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-12-23 16:53:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:32,818 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-12-23 16:53:32,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:32,818 INFO L225 Difference]: With dead ends: 65 [2020-12-23 16:53:32,818 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 16:53:32,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 16:53:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-23 16:53:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:53:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-12-23 16:53:32,822 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2020-12-23 16:53:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:32,822 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-12-23 16:53:32,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:53:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-12-23 16:53:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:53:32,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:32,823 INFO L422 BasicCegarLoop]: trace histogram [2, 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 16:53:32,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 16:53:32,823 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2020-12-23 16:53:32,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:32,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652028068] [2020-12-23 16:53:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:33,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652028068] [2020-12-23 16:53:33,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:33,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-23 16:53:33,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394284057] [2020-12-23 16:53:33,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 16:53:33,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 16:53:33,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:53:33,005 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 11 states. [2020-12-23 16:53:33,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:33,325 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-12-23 16:53:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:53:33,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-23 16:53:33,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:33,326 INFO L225 Difference]: With dead ends: 93 [2020-12-23 16:53:33,326 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 16:53:33,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:53:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 16:53:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2020-12-23 16:53:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 16:53:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-12-23 16:53:33,330 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2020-12-23 16:53:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:33,330 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-12-23 16:53:33,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 16:53:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-12-23 16:53:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 16:53:33,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:33,332 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 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 16:53:33,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 16:53:33,332 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2020-12-23 16:53:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:33,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049659217] [2020-12-23 16:53:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049659217] [2020-12-23 16:53:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339824765] [2020-12-23 16:53:33,480 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 16:53:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:33,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 16:53:33,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:33,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:33,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-12-23 16:53:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23534155] [2020-12-23 16:53:33,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:33,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:33,706 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 15 states. [2020-12-23 16:53:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:34,085 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-12-23 16:53:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:53:34,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-12-23 16:53:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:34,086 INFO L225 Difference]: With dead ends: 86 [2020-12-23 16:53:34,087 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 16:53:34,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:53:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 16:53:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2020-12-23 16:53:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 16:53:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-12-23 16:53:34,090 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2020-12-23 16:53:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:34,091 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-12-23 16:53:34,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-12-23 16:53:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 16:53:34,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:34,092 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:34,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:34,306 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:34,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2020-12-23 16:53:34,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:34,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441517319] [2020-12-23 16:53:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:34,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441517319] [2020-12-23 16:53:34,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326999248] [2020-12-23 16:53:34,922 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 16:53:34,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:34,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 16:53:34,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:35,027 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:35,028 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 9 treesize of output 25 [2020-12-23 16:53:35,030 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,052 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:35,055 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:35,186 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:35,187 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,194 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:35,196 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,196 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:35,676 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:35,677 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2020-12-23 16:53:35,679 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:35,693 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:35,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:35,699 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,699 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:35 [2020-12-23 16:53:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:36,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:36,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2020-12-23 16:53:36,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971747801] [2020-12-23 16:53:36,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:53:36,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:53:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:53:36,008 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 30 states. [2020-12-23 16:53:37,236 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-23 16:53:37,601 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-23 16:53:38,162 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-23 16:53:38,617 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-23 16:53:38,814 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-23 16:53:38,997 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-12-23 16:53:39,347 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-23 16:53:39,519 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 16:53:39,760 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-23 16:53:40,134 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-23 16:53:40,414 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-12-23 16:53:40,630 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-12-23 16:53:41,045 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-23 16:53:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:41,553 INFO L93 Difference]: Finished difference Result 167 states and 181 transitions. [2020-12-23 16:53:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 16:53:41,554 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2020-12-23 16:53:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:41,555 INFO L225 Difference]: With dead ends: 167 [2020-12-23 16:53:41,555 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 16:53:41,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=745, Invalid=3677, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 16:53:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 16:53:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 100. [2020-12-23 16:53:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 16:53:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2020-12-23 16:53:41,562 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 30 [2020-12-23 16:53:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:41,562 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2020-12-23 16:53:41,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:53:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2020-12-23 16:53:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 16:53:41,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:41,563 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:41,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 16:53:41,776 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:41,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1037145676, now seen corresponding path program 1 times [2020-12-23 16:53:41,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:41,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125077949] [2020-12-23 16:53:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:42,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125077949] [2020-12-23 16:53:42,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287707301] [2020-12-23 16:53:42,015 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 16:53:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:53:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:42,129 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:42,129 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 9 treesize of output 25 [2020-12-23 16:53:42,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:42,146 INFO L625 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2020-12-23 16:53:42,149 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:42,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:9, output treesize:5 [2020-12-23 16:53:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:42,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:42,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-12-23 16:53:42,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806085152] [2020-12-23 16:53:42,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:53:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:42,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:53:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:42,403 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand 23 states. [2020-12-23 16:53:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:42,991 INFO L93 Difference]: Finished difference Result 175 states and 191 transitions. [2020-12-23 16:53:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:53:42,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-12-23 16:53:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:42,993 INFO L225 Difference]: With dead ends: 175 [2020-12-23 16:53:42,993 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 16:53:42,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:53:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 16:53:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 134. [2020-12-23 16:53:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 16:53:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2020-12-23 16:53:42,998 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 35 [2020-12-23 16:53:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:42,998 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2020-12-23 16:53:42,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:53:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2020-12-23 16:53:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 16:53:42,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:42,999 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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 16:53:43,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:43,213 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:43,214 INFO L82 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2020-12-23 16:53:43,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:43,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133802547] [2020-12-23 16:53:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:43,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133802547] [2020-12-23 16:53:43,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033455451] [2020-12-23 16:53:43,670 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 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 16:53:43,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:43,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 16:53:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:43,782 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 16:53:43,784 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:43,788 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:43,789 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:43,790 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:43,950 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 14 treesize of output 10 [2020-12-23 16:53:43,951 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:43,960 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:43,962 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 16:53:43,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:44,025 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 25 treesize of output 24 [2020-12-23 16:53:44,027 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:44,037 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:44,041 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 16:53:44,041 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:53:44,427 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:44,428 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-23 16:53:44,430 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:44,447 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:53:44,449 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 16:53:44,450 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-23 16:53:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:44,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:44,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-12-23 16:53:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591140625] [2020-12-23 16:53:44,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:53:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:44,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:53:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:53:44,501 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand 24 states. [2020-12-23 16:53:45,402 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-12-23 16:53:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:46,329 INFO L93 Difference]: Finished difference Result 226 states and 248 transitions. [2020-12-23 16:53:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:53:46,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-12-23 16:53:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:46,331 INFO L225 Difference]: With dead ends: 226 [2020-12-23 16:53:46,332 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 16:53:46,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:53:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 16:53:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2020-12-23 16:53:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 16:53:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 194 transitions. [2020-12-23 16:53:46,338 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 194 transitions. Word has length 37 [2020-12-23 16:53:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:46,338 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 194 transitions. [2020-12-23 16:53:46,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:53:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 194 transitions. [2020-12-23 16:53:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 16:53:46,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:46,339 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:46,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:46,553 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 3 times [2020-12-23 16:53:46,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:46,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365981234] [2020-12-23 16:53:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:46,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365981234] [2020-12-23 16:53:46,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071150836] [2020-12-23 16:53:46,863 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 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 16:53:46,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:53:46,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:46,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 16:53:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:46,978 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 16:53:46,979 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:46,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:46,985 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:46,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:47,250 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 16:53:47,251 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,259 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:47,260 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,261 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-12-23 16:53:47,303 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 22 treesize of output 21 [2020-12-23 16:53:47,305 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,315 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:47,316 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 16:53:47,317 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2020-12-23 16:53:47,998 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:47,999 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2020-12-23 16:53:48,001 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:48,019 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:53:48,021 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 16:53:48,021 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:35, output treesize:3 [2020-12-23 16:53:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:48,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:48,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 33 [2020-12-23 16:53:48,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013342868] [2020-12-23 16:53:48,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:53:48,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:53:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:53:48,039 INFO L87 Difference]: Start difference. First operand 171 states and 194 transitions. Second operand 33 states. [2020-12-23 16:53:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:51,101 INFO L93 Difference]: Finished difference Result 346 states and 374 transitions. [2020-12-23 16:53:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:53:51,102 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 39 [2020-12-23 16:53:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:51,105 INFO L225 Difference]: With dead ends: 346 [2020-12-23 16:53:51,106 INFO L226 Difference]: Without dead ends: 272 [2020-12-23 16:53:51,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=535, Invalid=3247, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:53:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-23 16:53:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 183. [2020-12-23 16:53:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 16:53:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 207 transitions. [2020-12-23 16:53:51,116 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 207 transitions. Word has length 39 [2020-12-23 16:53:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:51,116 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 207 transitions. [2020-12-23 16:53:51,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:53:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 207 transitions. [2020-12-23 16:53:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 16:53:51,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:51,117 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:51,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 16:53:51,332 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2020-12-23 16:53:51,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:51,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157230865] [2020-12-23 16:53:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:51,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157230865] [2020-12-23 16:53:51,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479420917] [2020-12-23 16:53:51,509 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 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 16:53:51,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:53:51,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:51,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:53:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:51,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:51,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-23 16:53:51,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666960789] [2020-12-23 16:53:51,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:53:51,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:53:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:53:51,780 INFO L87 Difference]: Start difference. First operand 183 states and 207 transitions. Second operand 17 states. [2020-12-23 16:53:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:52,276 INFO L93 Difference]: Finished difference Result 242 states and 268 transitions. [2020-12-23 16:53:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:52,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-12-23 16:53:52,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:52,279 INFO L225 Difference]: With dead ends: 242 [2020-12-23 16:53:52,279 INFO L226 Difference]: Without dead ends: 242 [2020-12-23 16:53:52,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:53:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-23 16:53:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 216. [2020-12-23 16:53:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-23 16:53:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 245 transitions. [2020-12-23 16:53:52,286 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 245 transitions. Word has length 41 [2020-12-23 16:53:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:52,287 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 245 transitions. [2020-12-23 16:53:52,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:53:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 245 transitions. [2020-12-23 16:53:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 16:53:52,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:52,288 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:52,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:53:52,502 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 4 times [2020-12-23 16:53:52,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:52,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032983610] [2020-12-23 16:53:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:52,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032983610] [2020-12-23 16:53:52,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404961930] [2020-12-23 16:53:52,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:53:52,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 16:53:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:52,887 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:52,887 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 9 treesize of output 25 [2020-12-23 16:53:52,888 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,906 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:52,908 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:52,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:52,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,998 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:53,000 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:53,000 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:53:53,335 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:53,336 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2020-12-23 16:53:53,338 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:53,348 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:53,350 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:53,350 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:22 [2020-12-23 16:53:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:53,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:53,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2020-12-23 16:53:53,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798077591] [2020-12-23 16:53:53,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:53:53,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:53:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:53:53,570 INFO L87 Difference]: Start difference. First operand 216 states and 245 transitions. Second operand 28 states. [2020-12-23 16:53:55,381 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-23 16:53:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:55,867 INFO L93 Difference]: Finished difference Result 342 states and 377 transitions. [2020-12-23 16:53:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:53:55,870 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 43 [2020-12-23 16:53:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:55,871 INFO L225 Difference]: With dead ends: 342 [2020-12-23 16:53:55,871 INFO L226 Difference]: Without dead ends: 342 [2020-12-23 16:53:55,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=384, Invalid=1778, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 16:53:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-23 16:53:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 241. [2020-12-23 16:53:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 16:53:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 274 transitions. [2020-12-23 16:53:55,883 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 274 transitions. Word has length 43 [2020-12-23 16:53:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:55,883 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 274 transitions. [2020-12-23 16:53:55,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:53:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 274 transitions. [2020-12-23 16:53:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 16:53:55,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:55,884 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:56,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 16:53:56,098 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:56,099 INFO L82 PathProgramCache]: Analyzing trace with hash -24196359, now seen corresponding path program 5 times [2020-12-23 16:53:56,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:56,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847046466] [2020-12-23 16:53:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:56,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847046466] [2020-12-23 16:53:56,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946669231] [2020-12-23 16:53:56,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:53:56,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 16:53:56,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:56,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 16:53:56,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:56,513 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:56,514 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 9 treesize of output 25 [2020-12-23 16:53:56,515 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:56,537 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:56,539 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:56,540 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:56,743 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:56,744 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:56,750 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:56,751 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:56,752 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:57,330 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:57,330 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2020-12-23 16:53:57,332 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:57,348 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:57,349 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:57,351 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:57,351 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:35 [2020-12-23 16:53:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:57,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:57,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2020-12-23 16:53:57,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94044773] [2020-12-23 16:53:57,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:53:57,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:53:57,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:53:57,659 INFO L87 Difference]: Start difference. First operand 241 states and 274 transitions. Second operand 36 states. [2020-12-23 16:53:59,132 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-23 16:53:59,463 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-23 16:53:59,876 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-23 16:54:00,388 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-23 16:54:01,079 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-23 16:54:01,553 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-23 16:54:01,852 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-23 16:54:02,150 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-12-23 16:54:02,513 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-23 16:54:02,779 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-23 16:54:03,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:03,389 INFO L93 Difference]: Finished difference Result 540 states and 589 transitions. [2020-12-23 16:54:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 16:54:03,390 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2020-12-23 16:54:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:03,393 INFO L225 Difference]: With dead ends: 540 [2020-12-23 16:54:03,393 INFO L226 Difference]: Without dead ends: 469 [2020-12-23 16:54:03,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=618, Invalid=3804, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 16:54:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-12-23 16:54:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 337. [2020-12-23 16:54:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-23 16:54:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 382 transitions. [2020-12-23 16:54:03,410 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 382 transitions. Word has length 48 [2020-12-23 16:54:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:03,411 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 382 transitions. [2020-12-23 16:54:03,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 16:54:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 382 transitions. [2020-12-23 16:54:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 16:54:03,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:03,412 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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 16:54:03,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 16:54:03,627 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:03,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:03,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2020-12-23 16:54:03,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:03,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684809759] [2020-12-23 16:54:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:04,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684809759] [2020-12-23 16:54:04,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970343190] [2020-12-23 16:54:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:54:04,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:54:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:04,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 16:54:04,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:04,829 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_23|], 1=[|v_#valid_27|]} [2020-12-23 16:54:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:04,833 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2020-12-23 16:54:04,834 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:04,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:04,850 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 16:54:04,851 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:04,863 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:04,864 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:04,864 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-23 16:54:05,154 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 16 treesize of output 12 [2020-12-23 16:54:05,155 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:05,166 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 16:54:05,239 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 29 treesize of output 28 [2020-12-23 16:54:05,241 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,253 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:05,255 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 16:54:05,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-12-23 16:54:05,861 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2020-12-23 16:54:05,863 INFO L547 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:05,885 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:05,892 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:05,894 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-12-23 16:54:05,896 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,907 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:05,911 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,912 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:56, output treesize:3 [2020-12-23 16:54:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:06,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:06,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 15] total 41 [2020-12-23 16:54:06,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872994140] [2020-12-23 16:54:06,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 16:54:06,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:06,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 16:54:06,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:54:06,119 INFO L87 Difference]: Start difference. First operand 337 states and 382 transitions. Second operand 41 states. [2020-12-23 16:54:08,296 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-12-23 16:54:12,691 WARN L197 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-12-23 16:54:15,329 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-12-23 16:54:15,963 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-23 16:54:16,487 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-23 16:54:17,055 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-23 16:54:19,301 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-12-23 16:54:19,715 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-12-23 16:54:23,955 WARN L197 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-12-23 16:54:28,526 WARN L197 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-23 16:54:32,979 WARN L197 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-23 16:54:33,216 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-23 16:54:37,532 WARN L197 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-12-23 16:54:37,771 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-23 16:54:42,052 WARN L197 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-23 16:54:46,397 WARN L197 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-23 16:54:46,637 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-12-23 16:54:51,000 WARN L197 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-23 16:54:51,244 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 16:54:53,548 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-12-23 16:54:56,141 WARN L197 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-12-23 16:55:00,412 WARN L197 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-23 16:55:00,748 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-23 16:55:01,129 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-23 16:55:01,389 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-23 16:55:01,731 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-23 16:55:04,226 WARN L197 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-12-23 16:55:04,538 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-23 16:55:07,124 WARN L197 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-12-23 16:55:07,500 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-12-23 16:55:07,911 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-23 16:55:08,168 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-23 16:55:08,715 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-12-23 16:55:09,022 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-23 16:55:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:09,217 INFO L93 Difference]: Finished difference Result 633 states and 696 transitions. [2020-12-23 16:55:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 16:55:09,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-12-23 16:55:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:09,223 INFO L225 Difference]: With dead ends: 633 [2020-12-23 16:55:09,224 INFO L226 Difference]: Without dead ends: 491 [2020-12-23 16:55:09,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=1290, Invalid=8216, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 16:55:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-12-23 16:55:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 392. [2020-12-23 16:55:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-12-23 16:55:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 445 transitions. [2020-12-23 16:55:09,245 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 445 transitions. Word has length 49 [2020-12-23 16:55:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:09,247 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 445 transitions. [2020-12-23 16:55:09,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 16:55:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 445 transitions. [2020-12-23 16:55:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 16:55:09,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:09,249 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:09,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 16:55:09,464 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:09,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 5 times [2020-12-23 16:55:09,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:09,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047723410] [2020-12-23 16:55:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:55:09,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047723410] [2020-12-23 16:55:09,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440732879] [2020-12-23 16:55:09,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:55:09,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 16:55:09,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 16:55:09,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:09,866 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:09,866 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 9 treesize of output 25 [2020-12-23 16:55:09,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:09,897 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 16:55:09,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:09,899 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 16:55:09,900 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:21 [2020-12-23 16:55:09,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:09,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:09,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:10,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:10,066 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:10,147 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:10,219 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:10,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:10,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:10,731 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-23 16:55:10,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:11,031 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-23 16:55:11,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:11,217 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 16:55:11,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:11,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2020-12-23 16:55:11,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850789248] [2020-12-23 16:55:11,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:55:11,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:55:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:55:11,219 INFO L87 Difference]: Start difference. First operand 392 states and 445 transitions. Second operand 27 states. [2020-12-23 16:55:11,811 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-12-23 16:55:12,119 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-12-23 16:55:12,512 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-23 16:55:12,710 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-12-23 16:55:12,979 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-12-23 16:55:13,255 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-23 16:55:13,653 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-12-23 16:55:13,849 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-23 16:55:14,092 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-23 16:55:14,285 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-23 16:55:14,522 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-12-23 16:55:14,971 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-23 16:55:15,176 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-12-23 16:55:15,540 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-12-23 16:55:15,728 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-23 16:55:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:15,903 INFO L93 Difference]: Finished difference Result 611 states and 679 transitions. [2020-12-23 16:55:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:55:15,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2020-12-23 16:55:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:15,913 INFO L225 Difference]: With dead ends: 611 [2020-12-23 16:55:15,913 INFO L226 Difference]: Without dead ends: 611 [2020-12-23 16:55:15,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 16:55:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-12-23 16:55:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 453. [2020-12-23 16:55:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-12-23 16:55:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 515 transitions. [2020-12-23 16:55:15,934 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 515 transitions. Word has length 53 [2020-12-23 16:55:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:15,935 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 515 transitions. [2020-12-23 16:55:15,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:55:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 515 transitions. [2020-12-23 16:55:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 16:55:15,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:15,942 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:16,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:16,156 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 6 times [2020-12-23 16:55:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:16,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022644088] [2020-12-23 16:55:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:16,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022644088] [2020-12-23 16:55:16,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444499889] [2020-12-23 16:55:16,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:55:16,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 16:55:16,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:16,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 16:55:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:16,963 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:16,965 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:16,974 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:16,976 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 16:55:16,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:55:17,308 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-12-23 16:55:17,309 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:17,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:17,311 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:17,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:55:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:17,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:17,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 31 [2020-12-23 16:55:17,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854918887] [2020-12-23 16:55:17,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:55:17,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:17,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:55:17,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:55:17,327 INFO L87 Difference]: Start difference. First operand 453 states and 515 transitions. Second operand 31 states. [2020-12-23 16:55:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:19,150 INFO L93 Difference]: Finished difference Result 805 states and 890 transitions. [2020-12-23 16:55:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:55:19,151 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-12-23 16:55:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:19,154 INFO L225 Difference]: With dead ends: 805 [2020-12-23 16:55:19,154 INFO L226 Difference]: Without dead ends: 675 [2020-12-23 16:55:19,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=1628, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:55:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-12-23 16:55:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 566. [2020-12-23 16:55:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-12-23 16:55:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 642 transitions. [2020-12-23 16:55:19,171 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 642 transitions. Word has length 57 [2020-12-23 16:55:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:19,171 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 642 transitions. [2020-12-23 16:55:19,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:55:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 642 transitions. [2020-12-23 16:55:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 16:55:19,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:19,173 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:19,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:19,387 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:19,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1164356062, now seen corresponding path program 7 times [2020-12-23 16:55:19,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:19,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249249972] [2020-12-23 16:55:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249249972] [2020-12-23 16:55:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49521738] [2020-12-23 16:55:19,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 16:55:19,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:19,904 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:19,905 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 9 treesize of output 25 [2020-12-23 16:55:19,906 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:19,930 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:55:19,933 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:19,933 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:55:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:20,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:20,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2020-12-23 16:55:20,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978950065] [2020-12-23 16:55:20,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 16:55:20,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 16:55:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:55:20,597 INFO L87 Difference]: Start difference. First operand 566 states and 642 transitions. Second operand 35 states. [2020-12-23 16:55:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:22,067 INFO L93 Difference]: Finished difference Result 766 states and 849 transitions. [2020-12-23 16:55:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:55:22,068 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 61 [2020-12-23 16:55:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:22,072 INFO L225 Difference]: With dead ends: 766 [2020-12-23 16:55:22,072 INFO L226 Difference]: Without dead ends: 766 [2020-12-23 16:55:22,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:55:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-12-23 16:55:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 601. [2020-12-23 16:55:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-12-23 16:55:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 683 transitions. [2020-12-23 16:55:22,090 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 683 transitions. Word has length 61 [2020-12-23 16:55:22,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:22,090 INFO L481 AbstractCegarLoop]: Abstraction has 601 states and 683 transitions. [2020-12-23 16:55:22,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 16:55:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 683 transitions. [2020-12-23 16:55:22,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 16:55:22,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:22,092 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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 16:55:22,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 16:55:22,307 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:22,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1052245572, now seen corresponding path program 6 times [2020-12-23 16:55:22,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:22,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117364715] [2020-12-23 16:55:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:55:22,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117364715] [2020-12-23 16:55:22,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949887831] [2020-12-23 16:55:22,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:23,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:55:23,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-23 16:55:23,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:23,127 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 16:55:23,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:23,135 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:23,135 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:23,136 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:55:23,486 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 14 treesize of output 10 [2020-12-23 16:55:23,486 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:23,496 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:23,498 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 16:55:23,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-23 16:55:23,608 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 25 treesize of output 24 [2020-12-23 16:55:23,610 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:23,626 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:23,627 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 16:55:23,628 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:34 [2020-12-23 16:55:25,508 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:25,509 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 38 [2020-12-23 16:55:25,511 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:25,539 INFO L625 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2020-12-23 16:55:25,542 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 16:55:25,542 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:8 [2020-12-23 16:55:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:55:25,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:25,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-12-23 16:55:25,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065438900] [2020-12-23 16:55:25,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 16:55:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:25,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 16:55:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2134, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:55:25,718 INFO L87 Difference]: Start difference. First operand 601 states and 683 transitions. Second operand 48 states. [2020-12-23 16:55:27,168 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-23 16:55:27,396 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-12-23 16:55:27,708 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-23 16:55:27,954 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-23 16:55:28,178 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:55:28,449 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-23 16:55:28,718 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-23 16:55:28,968 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-23 16:55:29,270 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-12-23 16:55:29,633 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 16:55:29,854 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-12-23 16:55:30,175 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-12-23 16:55:30,461 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-12-23 16:55:30,695 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 16:55:31,085 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-23 16:55:31,299 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-12-23 16:55:31,588 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-23 16:55:31,808 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 16:55:32,030 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-12-23 16:55:32,450 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:55:32,687 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:55:32,895 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 16:55:33,146 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-23 16:55:33,356 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-23 16:55:33,546 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-23 16:55:33,744 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-12-23 16:55:33,929 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:55:34,129 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-12-23 16:55:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:34,581 INFO L93 Difference]: Finished difference Result 1183 states and 1328 transitions. [2020-12-23 16:55:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 16:55:34,582 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 61 [2020-12-23 16:55:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:34,587 INFO L225 Difference]: With dead ends: 1183 [2020-12-23 16:55:34,588 INFO L226 Difference]: Without dead ends: 1183 [2020-12-23 16:55:34,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=735, Invalid=7097, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 16:55:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2020-12-23 16:55:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 938. [2020-12-23 16:55:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 16:55:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1065 transitions. [2020-12-23 16:55:34,617 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1065 transitions. Word has length 61 [2020-12-23 16:55:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:34,617 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1065 transitions. [2020-12-23 16:55:34,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 16:55:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1065 transitions. [2020-12-23 16:55:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 16:55:34,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:34,620 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:34,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:34,834 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:34,834 INFO L82 PathProgramCache]: Analyzing trace with hash 241818559, now seen corresponding path program 7 times [2020-12-23 16:55:34,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:34,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029377115] [2020-12-23 16:55:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:55:35,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029377115] [2020-12-23 16:55:35,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123471337] [2020-12-23 16:55:35,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 16:55:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:55:35,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:35,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-12-23 16:55:35,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672038091] [2020-12-23 16:55:35,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:55:35,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:35,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:55:35,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:55:35,670 INFO L87 Difference]: Start difference. First operand 938 states and 1065 transitions. Second operand 23 states. [2020-12-23 16:55:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:36,915 INFO L93 Difference]: Finished difference Result 1234 states and 1391 transitions. [2020-12-23 16:55:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:55:36,916 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-12-23 16:55:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:36,922 INFO L225 Difference]: With dead ends: 1234 [2020-12-23 16:55:36,923 INFO L226 Difference]: Without dead ends: 1234 [2020-12-23 16:55:36,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:55:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-12-23 16:55:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1027. [2020-12-23 16:55:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-12-23 16:55:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1167 transitions. [2020-12-23 16:55:36,946 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1167 transitions. Word has length 65 [2020-12-23 16:55:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:36,947 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1167 transitions. [2020-12-23 16:55:36,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:55:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1167 transitions. [2020-12-23 16:55:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 16:55:36,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:36,949 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:37,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 16:55:37,163 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:37,164 INFO L82 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 8 times [2020-12-23 16:55:37,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:37,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295393158] [2020-12-23 16:55:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:37,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295393158] [2020-12-23 16:55:37,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374346163] [2020-12-23 16:55:37,623 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:37,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:55:37,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 16:55:37,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:38,067 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:38,068 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:38,077 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:38,078 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 16:55:38,078 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:55:38,433 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-12-23 16:55:38,435 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:38,436 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:38,436 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:38,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:55:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:38,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:38,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 34 [2020-12-23 16:55:38,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889673779] [2020-12-23 16:55:38,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 16:55:38,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 16:55:38,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:55:38,455 INFO L87 Difference]: Start difference. First operand 1027 states and 1167 transitions. Second operand 34 states. [2020-12-23 16:55:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:41,075 INFO L93 Difference]: Finished difference Result 1690 states and 1879 transitions. [2020-12-23 16:55:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:55:41,076 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-23 16:55:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:41,083 INFO L225 Difference]: With dead ends: 1690 [2020-12-23 16:55:41,083 INFO L226 Difference]: Without dead ends: 1523 [2020-12-23 16:55:41,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=287, Invalid=1969, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:55:41,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2020-12-23 16:55:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1287. [2020-12-23 16:55:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1287 states. [2020-12-23 16:55:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1462 transitions. [2020-12-23 16:55:41,111 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1462 transitions. Word has length 66 [2020-12-23 16:55:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:41,112 INFO L481 AbstractCegarLoop]: Abstraction has 1287 states and 1462 transitions. [2020-12-23 16:55:41,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 16:55:41,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1462 transitions. [2020-12-23 16:55:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 16:55:41,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:41,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:41,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 16:55:41,327 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1184709681, now seen corresponding path program 1 times [2020-12-23 16:55:41,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:41,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401089341] [2020-12-23 16:55:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:55:41,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401089341] [2020-12-23 16:55:41,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543264565] [2020-12-23 16:55:41,797 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 16:55:41,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:42,082 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:42,082 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:42,091 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:42,092 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 16:55:42,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:55:42,819 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:42,820 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2020-12-23 16:55:42,826 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:42,869 INFO L625 ElimStorePlain]: treesize reduction 21, result has 51.2 percent of original size [2020-12-23 16:55:42,873 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 16:55:42,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:31, output treesize:3 [2020-12-23 16:55:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 16:55:43,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:43,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2020-12-23 16:55:43,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503432878] [2020-12-23 16:55:43,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:55:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:55:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:55:43,003 INFO L87 Difference]: Start difference. First operand 1287 states and 1462 transitions. Second operand 30 states. [2020-12-23 16:55:51,331 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-23 16:55:51,686 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-23 16:55:51,883 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-23 16:55:52,347 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-23 16:55:52,644 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-23 16:55:52,878 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-23 16:55:53,102 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-23 16:55:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:53,234 INFO L93 Difference]: Finished difference Result 1596 states and 1769 transitions. [2020-12-23 16:55:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 16:55:53,235 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-12-23 16:55:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:53,241 INFO L225 Difference]: With dead ends: 1596 [2020-12-23 16:55:53,242 INFO L226 Difference]: Without dead ends: 1185 [2020-12-23 16:55:53,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1161, Invalid=9759, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 16:55:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2020-12-23 16:55:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 964. [2020-12-23 16:55:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2020-12-23 16:55:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1091 transitions. [2020-12-23 16:55:53,266 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1091 transitions. Word has length 66 [2020-12-23 16:55:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:53,266 INFO L481 AbstractCegarLoop]: Abstraction has 964 states and 1091 transitions. [2020-12-23 16:55:53,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:55:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1091 transitions. [2020-12-23 16:55:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 16:55:53,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:53,268 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:53,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 16:55:53,484 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:53,485 INFO L82 PathProgramCache]: Analyzing trace with hash 267889840, now seen corresponding path program 9 times [2020-12-23 16:55:53,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:53,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810027845] [2020-12-23 16:55:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:54,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810027845] [2020-12-23 16:55:54,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311022658] [2020-12-23 16:55:54,043 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:54,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 16:55:54,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 16:55:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:54,220 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:54,220 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 9 treesize of output 25 [2020-12-23 16:55:54,222 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:54,248 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:55:54,251 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:54,251 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:55:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:55,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:55,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2020-12-23 16:55:55,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081500480] [2020-12-23 16:55:55,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:55:55,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:55:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:55:55,288 INFO L87 Difference]: Start difference. First operand 964 states and 1091 transitions. Second operand 39 states. [2020-12-23 16:55:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:58,395 INFO L93 Difference]: Finished difference Result 1176 states and 1306 transitions. [2020-12-23 16:55:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:55:58,396 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 70 [2020-12-23 16:55:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:58,400 INFO L225 Difference]: With dead ends: 1176 [2020-12-23 16:55:58,401 INFO L226 Difference]: Without dead ends: 1176 [2020-12-23 16:55:58,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=596, Invalid=2374, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 16:55:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2020-12-23 16:55:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1009. [2020-12-23 16:55:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1009 states. [2020-12-23 16:55:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1144 transitions. [2020-12-23 16:55:58,421 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1144 transitions. Word has length 70 [2020-12-23 16:55:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:58,422 INFO L481 AbstractCegarLoop]: Abstraction has 1009 states and 1144 transitions. [2020-12-23 16:55:58,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:55:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1144 transitions. [2020-12-23 16:55:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 16:55:58,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:58,425 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:58,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:55:58,641 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:58,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 8 times [2020-12-23 16:55:58,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:58,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198827806] [2020-12-23 16:55:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:55:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198827806] [2020-12-23 16:55:59,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080757442] [2020-12-23 16:55:59,599 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:59,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:55:59,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 118 conjunts are in the unsatisfiable core [2020-12-23 16:55:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:59,746 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 16:55:59,748 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:59,756 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:59,758 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:59,758 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:56:00,244 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 14 treesize of output 10 [2020-12-23 16:56:00,246 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:00,260 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:00,262 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 16:56:00,262 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-23 16:56:00,368 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 25 treesize of output 24 [2020-12-23 16:56:00,369 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:00,385 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:00,386 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 16:56:00,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:34 [2020-12-23 16:56:03,453 INFO L348 Elim1Store]: treesize reduction 10, result has 77.8 percent of original size [2020-12-23 16:56:03,454 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 54 [2020-12-23 16:56:03,461 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:03,499 INFO L625 ElimStorePlain]: treesize reduction 9, result has 71.0 percent of original size [2020-12-23 16:56:03,505 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 16:56:03,505 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:65, output treesize:8 [2020-12-23 16:56:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:56:03,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:03,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2020-12-23 16:56:03,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246036860] [2020-12-23 16:56:03,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 16:56:03,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 16:56:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2736, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:56:03,785 INFO L87 Difference]: Start difference. First operand 1009 states and 1144 transitions. Second operand 54 states. [2020-12-23 16:56:06,163 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-23 16:56:06,451 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-12-23 16:56:06,862 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-23 16:56:07,647 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-23 16:56:08,196 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-23 16:56:08,660 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-23 16:56:08,883 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-23 16:56:09,268 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-12-23 16:56:09,734 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-23 16:56:10,195 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-23 16:56:10,857 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-23 16:56:11,284 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-23 16:56:11,666 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-23 16:56:12,117 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-23 16:56:12,423 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-23 16:56:12,777 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-23 16:56:13,187 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-23 16:56:13,589 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-23 16:56:13,829 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-23 16:56:14,243 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-23 16:56:14,561 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:56:15,052 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-23 16:56:15,375 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-23 16:56:15,938 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:56:16,244 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-23 16:56:16,676 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-23 16:56:16,933 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-23 16:56:17,186 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-23 16:56:17,476 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-12-23 16:56:17,681 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-12-23 16:56:17,978 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-23 16:56:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:19,923 INFO L93 Difference]: Finished difference Result 2183 states and 2453 transitions. [2020-12-23 16:56:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 16:56:19,926 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 73 [2020-12-23 16:56:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:19,934 INFO L225 Difference]: With dead ends: 2183 [2020-12-23 16:56:19,934 INFO L226 Difference]: Without dead ends: 2140 [2020-12-23 16:56:19,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=940, Invalid=10832, Unknown=0, NotChecked=0, Total=11772 [2020-12-23 16:56:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2020-12-23 16:56:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1582. [2020-12-23 16:56:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1582 states. [2020-12-23 16:56:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 1795 transitions. [2020-12-23 16:56:19,977 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 1795 transitions. Word has length 73 [2020-12-23 16:56:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:19,977 INFO L481 AbstractCegarLoop]: Abstraction has 1582 states and 1795 transitions. [2020-12-23 16:56:19,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 16:56:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 1795 transitions. [2020-12-23 16:56:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 16:56:19,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:19,981 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:20,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:56:20,195 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash 15423873, now seen corresponding path program 10 times [2020-12-23 16:56:20,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:20,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076677453] [2020-12-23 16:56:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076677453] [2020-12-23 16:56:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665287548] [2020-12-23 16:56:20,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:20,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:56:20,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:20,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 16:56:20,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:21,010 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:21,011 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 9 treesize of output 25 [2020-12-23 16:56:21,013 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:21,042 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:56:21,045 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:21,046 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:56:21,699 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 16:56:21,701 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:21,710 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:21,712 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:21,713 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 16:56:22,682 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 24 treesize of output 18 [2020-12-23 16:56:22,684 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:22,703 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:22,710 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:56:22,715 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:22,715 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-12-23 16:56:22,717 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:22,730 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:22,733 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:22,733 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-12-23 16:56:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 96 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:22,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:22,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 45 [2020-12-23 16:56:22,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598756254] [2020-12-23 16:56:22,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 16:56:22,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 16:56:22,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:56:22,759 INFO L87 Difference]: Start difference. First operand 1582 states and 1795 transitions. Second operand 45 states. [2020-12-23 16:56:25,570 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-23 16:56:26,241 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-23 16:56:27,519 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-23 16:56:28,684 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-23 16:56:29,995 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-23 16:56:30,693 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-23 16:56:30,903 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-23 16:56:31,154 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-23 16:56:32,293 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-23 16:56:32,709 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-23 16:56:33,211 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-23 16:56:34,294 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-23 16:56:34,904 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-23 16:56:35,505 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-23 16:56:35,749 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-23 16:56:35,960 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-23 16:56:36,166 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-23 16:56:36,572 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-23 16:56:37,474 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-23 16:56:37,856 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-23 16:56:38,341 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-23 16:56:38,639 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-23 16:56:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:39,950 INFO L93 Difference]: Finished difference Result 2598 states and 2871 transitions. [2020-12-23 16:56:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 16:56:39,951 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 75 [2020-12-23 16:56:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:39,960 INFO L225 Difference]: With dead ends: 2598 [2020-12-23 16:56:39,961 INFO L226 Difference]: Without dead ends: 2348 [2020-12-23 16:56:39,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3774 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1712, Invalid=14290, Unknown=0, NotChecked=0, Total=16002 [2020-12-23 16:56:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2020-12-23 16:56:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1919. [2020-12-23 16:56:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2020-12-23 16:56:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 2180 transitions. [2020-12-23 16:56:40,007 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 2180 transitions. Word has length 75 [2020-12-23 16:56:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:40,008 INFO L481 AbstractCegarLoop]: Abstraction has 1919 states and 2180 transitions. [2020-12-23 16:56:40,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 16:56:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 2180 transitions. [2020-12-23 16:56:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 16:56:40,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:40,011 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:40,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:40,225 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:40,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 9 times [2020-12-23 16:56:40,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:40,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474764796] [2020-12-23 16:56:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:56:40,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474764796] [2020-12-23 16:56:40,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225384707] [2020-12-23 16:56:40,781 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:40,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 16:56:40,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 16:56:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:41,028 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:41,029 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 9 treesize of output 25 [2020-12-23 16:56:41,031 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:41,073 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 16:56:41,076 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:41,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:7 [2020-12-23 16:56:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:56:41,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:41,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-12-23 16:56:41,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187739556] [2020-12-23 16:56:41,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:56:41,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:41,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:56:41,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:56:41,675 INFO L87 Difference]: Start difference. First operand 1919 states and 2180 transitions. Second operand 26 states. [2020-12-23 16:56:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:44,018 INFO L93 Difference]: Finished difference Result 2495 states and 2824 transitions. [2020-12-23 16:56:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:56:44,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-12-23 16:56:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:44,028 INFO L225 Difference]: With dead ends: 2495 [2020-12-23 16:56:44,029 INFO L226 Difference]: Without dead ends: 2495 [2020-12-23 16:56:44,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:56:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2020-12-23 16:56:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2082. [2020-12-23 16:56:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2082 states. [2020-12-23 16:56:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2366 transitions. [2020-12-23 16:56:44,070 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2366 transitions. Word has length 77 [2020-12-23 16:56:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:44,071 INFO L481 AbstractCegarLoop]: Abstraction has 2082 states and 2366 transitions. [2020-12-23 16:56:44,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:56:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2366 transitions. [2020-12-23 16:56:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 16:56:44,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:44,074 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:44,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 16:56:44,289 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:44,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1372924284, now seen corresponding path program 11 times [2020-12-23 16:56:44,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:44,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874609180] [2020-12-23 16:56:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:45,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874609180] [2020-12-23 16:56:45,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689001210] [2020-12-23 16:56:45,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:45,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 16:56:45,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 16:56:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:45,214 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:45,214 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 9 treesize of output 25 [2020-12-23 16:56:45,216 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:45,255 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:56:45,259 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:45,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:56:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:45,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:45,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 31 [2020-12-23 16:56:45,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482463071] [2020-12-23 16:56:45,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:56:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:56:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:56:45,955 INFO L87 Difference]: Start difference. First operand 2082 states and 2366 transitions. Second operand 32 states. [2020-12-23 16:56:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:48,752 INFO L93 Difference]: Finished difference Result 2459 states and 2750 transitions. [2020-12-23 16:56:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:56:48,753 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 79 [2020-12-23 16:56:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:48,762 INFO L225 Difference]: With dead ends: 2459 [2020-12-23 16:56:48,763 INFO L226 Difference]: Without dead ends: 2459 [2020-12-23 16:56:48,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:56:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2020-12-23 16:56:48,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2152. [2020-12-23 16:56:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-12-23 16:56:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2449 transitions. [2020-12-23 16:56:48,803 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2449 transitions. Word has length 79 [2020-12-23 16:56:48,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:48,804 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 2449 transitions. [2020-12-23 16:56:48,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:56:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2449 transitions. [2020-12-23 16:56:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 16:56:48,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:48,808 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:49,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:49,023 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2122268416, now seen corresponding path program 2 times [2020-12-23 16:56:49,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:49,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52929958] [2020-12-23 16:56:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 16:56:49,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52929958] [2020-12-23 16:56:49,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597943344] [2020-12-23 16:56:49,901 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:50,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:56:50,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:50,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 16:56:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:50,080 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 16:56:50,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:50,094 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:50,096 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:50,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:56:50,654 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 14 treesize of output 10 [2020-12-23 16:56:50,656 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:50,667 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:50,669 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 16:56:50,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:56:50,776 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 25 treesize of output 24 [2020-12-23 16:56:50,778 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:50,795 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:50,797 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 16:56:50,798 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:56:52,038 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:52,039 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-23 16:56:52,042 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:56:52,065 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:56:52,067 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 16:56:52,068 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-23 16:56:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 16:56:52,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:52,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-12-23 16:56:52,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460172108] [2020-12-23 16:56:52,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:56:52,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:56:52,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1172, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:56:52,244 INFO L87 Difference]: Start difference. First operand 2152 states and 2449 transitions. Second operand 36 states. [2020-12-23 16:56:54,249 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-23 16:56:58,491 WARN L197 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-23 16:57:02,803 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:57:07,271 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-23 16:57:11,540 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:57:15,806 WARN L197 SmtUtils]: Spent 3.43 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-23 16:57:20,103 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:57:24,831 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-23 16:57:29,042 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:57:33,439 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 55 DAG size of output: 45