/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_cstrnlen-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:53:19,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:53:19,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:53:20,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:53:20,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:53:20,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:53:20,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:53:20,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:53:20,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:53:20,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:53:20,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:53:20,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:53:20,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:53:20,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:53:20,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:53:20,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:53:20,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:53:20,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:53:20,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:53:20,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:53:20,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:53:20,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:53:20,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:53:20,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:53:20,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:53:20,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:53:20,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:53:20,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:53:20,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:53:20,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:53:20,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:53:20,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:53:20,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:53:20,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:53:20,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:53:20,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:53:20,078 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 16:53:20,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:53:20,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:53:20,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:53:20,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:53:20,116 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:53:20,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:53:20,117 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:53:20,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:53:20,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:53:20,119 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:53:20,119 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:53:20,119 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:53:20,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:53:20,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:53:20,120 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:53:20,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:53:20,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:53:20,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:53:20,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:53:20,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:53:20,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:53:20,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:53:20,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:53:20,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:53:20,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:53:20,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:53:20,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:53:20,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:53:20,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:53:20,615 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:53:20,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-12-23 16:53:20,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ead2fabd/3ad005a236f04c49a6868884c568fc51/FLAGcac015fd4 [2020-12-23 16:53:21,406 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:53:21,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-12-23 16:53:21,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ead2fabd/3ad005a236f04c49a6868884c568fc51/FLAGcac015fd4 [2020-12-23 16:53:21,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ead2fabd/3ad005a236f04c49a6868884c568fc51 [2020-12-23 16:53:21,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:53:21,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:53:21,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:21,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:53:21,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:53:21,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:21" (1/1) ... [2020-12-23 16:53:21,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d0f463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:21, skipping insertion in model container [2020-12-23 16:53:21,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:21" (1/1) ... [2020-12-23 16:53:21,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:53:21,765 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~cp~0,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~n~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[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:22,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:22,113 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~cp~0,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~n~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[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:22,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:22,279 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:53:22,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22 WrapperNode [2020-12-23 16:53:22,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:22,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:22,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:53:22,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:53:22,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:22,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:53:22,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:53:22,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:53:22,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (1/1) ... [2020-12-23 16:53:22,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:53:22,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:53:22,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:53:22,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:53:22,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (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 16:53:22,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:53:22,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:53:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:53:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:53:22,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:53:22,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:53:22,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:53:22,974 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 16:53:22,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:22 BoogieIcfgContainer [2020-12-23 16:53:22,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:53:22,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:53:22,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:53:22,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:53:22,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:53:21" (1/3) ... [2020-12-23 16:53:22,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19403ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:22, skipping insertion in model container [2020-12-23 16:53:22,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:22" (2/3) ... [2020-12-23 16:53:22,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19403ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:22, skipping insertion in model container [2020-12-23 16:53:22,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:22" (3/3) ... [2020-12-23 16:53:22,987 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2020-12-23 16:53:23,010 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:53:23,022 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-23 16:53:23,080 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-23 16:53:23,128 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:53:23,128 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:53:23,128 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:53:23,129 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:53:23,129 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:53:23,129 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:53:23,129 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:53:23,129 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:53:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-23 16:53:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:23,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:23,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:23,154 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029043, now seen corresponding path program 1 times [2020-12-23 16:53:23,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:23,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599922825] [2020-12-23 16:53:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:23,415 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 16:53:23,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599922825] [2020-12-23 16:53:23,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:23,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522929809] [2020-12-23 16:53:23,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:23,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:23,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:23,454 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-12-23 16:53:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:23,548 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-23 16:53:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:23,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:53:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:23,579 INFO L225 Difference]: With dead ends: 27 [2020-12-23 16:53:23,580 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 16:53:23,583 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 16:53:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 16:53:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 16:53:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 16:53:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 16:53:23,637 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2020-12-23 16:53:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:23,638 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 16:53:23,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 16:53:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:23,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:23,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:23,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:53:23,641 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:23,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029044, now seen corresponding path program 1 times [2020-12-23 16:53:23,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:23,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027449481] [2020-12-23 16:53:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:23,742 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 16:53:23,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027449481] [2020-12-23 16:53:23,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:23,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:23,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664692289] [2020-12-23 16:53:23,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:23,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:23,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:23,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:23,746 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2020-12-23 16:53:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:23,781 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-23 16:53:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:23,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:53:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:23,783 INFO L225 Difference]: With dead ends: 24 [2020-12-23 16:53:23,783 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 16:53:23,784 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 16:53:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 16:53:23,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 16:53:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 16:53:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 16:53:23,789 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-12-23 16:53:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:23,789 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 16:53:23,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 16:53:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:23,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:23,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:23,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:53:23,791 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2020-12-23 16:53:23,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:23,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839961094] [2020-12-23 16:53:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:23,837 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 16:53:23,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839961094] [2020-12-23 16:53:23,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:23,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:23,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72999900] [2020-12-23 16:53:23,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:23,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:23,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:23,840 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-12-23 16:53:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:23,863 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-12-23 16:53:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:23,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:53:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:23,866 INFO L225 Difference]: With dead ends: 41 [2020-12-23 16:53:23,866 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 16:53:23,867 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 16:53:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 16:53:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2020-12-23 16:53:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 16:53:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-23 16:53:23,872 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2020-12-23 16:53:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:23,873 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-23 16:53:23,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-23 16:53:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:23,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:23,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:23,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:53:23,875 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:23,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-23 16:53:23,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:23,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914560852] [2020-12-23 16:53:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:24,008 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 16:53:24,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914560852] [2020-12-23 16:53:24,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:24,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:24,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429435051] [2020-12-23 16:53:24,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:24,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:24,012 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2020-12-23 16:53:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:24,077 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-23 16:53:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:24,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 16:53:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:24,080 INFO L225 Difference]: With dead ends: 45 [2020-12-23 16:53:24,080 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 16:53:24,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 16:53:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2020-12-23 16:53:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 16:53:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-23 16:53:24,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2020-12-23 16:53:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:24,092 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-23 16:53:24,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-23 16:53:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:24,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:24,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:24,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:53:24,094 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1954750824, now seen corresponding path program 1 times [2020-12-23 16:53:24,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:24,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118550572] [2020-12-23 16:53:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:24,182 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 16:53:24,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118550572] [2020-12-23 16:53:24,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:24,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:24,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874432543] [2020-12-23 16:53:24,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:24,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:24,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:24,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:24,186 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-12-23 16:53:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:24,261 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-23 16:53:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:24,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 16:53:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:24,263 INFO L225 Difference]: With dead ends: 28 [2020-12-23 16:53:24,264 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 16:53:24,266 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 16:53:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 16:53:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 16:53:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:53:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-23 16:53:24,286 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2020-12-23 16:53:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:24,286 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-23 16:53:24,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-23 16:53:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:24,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:24,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:24,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:53:24,288 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1954750823, now seen corresponding path program 1 times [2020-12-23 16:53:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:24,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502155644] [2020-12-23 16:53:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:24,364 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 16:53:24,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502155644] [2020-12-23 16:53:24,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:24,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:24,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129553137] [2020-12-23 16:53:24,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:24,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:24,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:24,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:24,367 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 6 states. [2020-12-23 16:53:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:24,436 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-12-23 16:53:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:24,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 16:53:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:24,438 INFO L225 Difference]: With dead ends: 38 [2020-12-23 16:53:24,438 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 16:53:24,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 16:53:24,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-23 16:53:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 16:53:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-23 16:53:24,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2020-12-23 16:53:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:24,443 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-23 16:53:24,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-23 16:53:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:24,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:24,445 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:24,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:53:24,445 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-23 16:53:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:24,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756526560] [2020-12-23 16:53:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:24,514 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 16:53:24,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756526560] [2020-12-23 16:53:24,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720205272] [2020-12-23 16:53:24,516 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 16:53:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:24,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:53:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:24,658 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:53:24,659 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,667 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:24,668 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,669 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:53:24,759 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 16:53:24,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:24,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:53:24,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487184336] [2020-12-23 16:53:24,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:24,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:24,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:24,763 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 6 states. [2020-12-23 16:53:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:24,871 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-12-23 16:53:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:24,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 16:53:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:24,877 INFO L225 Difference]: With dead ends: 48 [2020-12-23 16:53:24,877 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 16:53:24,879 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 16:53:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 16:53:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2020-12-23 16:53:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:53:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-23 16:53:24,884 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2020-12-23 16:53:24,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:24,884 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-23 16:53:24,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-23 16:53:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:53:24,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:24,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:25,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 16:53:25,100 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:25,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1485608773, now seen corresponding path program 1 times [2020-12-23 16:53:25,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:25,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981468887] [2020-12-23 16:53:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:25,193 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 16:53:25,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981468887] [2020-12-23 16:53:25,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:25,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:25,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036248632] [2020-12-23 16:53:25,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:25,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:25,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:25,204 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-23 16:53:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:25,282 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-23 16:53:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:25,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 16:53:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:25,287 INFO L225 Difference]: With dead ends: 58 [2020-12-23 16:53:25,287 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 16:53:25,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:25,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 16:53:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-12-23 16:53:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 16:53:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-12-23 16:53:25,309 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2020-12-23 16:53:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:25,309 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-12-23 16:53:25,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-12-23 16:53:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:53:25,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:25,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:25,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:53:25,312 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2108293945, now seen corresponding path program 1 times [2020-12-23 16:53:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:25,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64424593] [2020-12-23 16:53:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:25,445 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 16:53:25,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64424593] [2020-12-23 16:53:25,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:25,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:53:25,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079034957] [2020-12-23 16:53:25,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:25,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:25,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:25,448 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-12-23 16:53:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:25,525 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-23 16:53:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:25,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 16:53:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:25,526 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:53:25,526 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 16:53:25,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 16:53:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-12-23 16:53:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:53:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 16:53:25,530 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2020-12-23 16:53:25,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:25,531 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 16:53:25,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 16:53:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:53:25,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:25,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:25,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:53:25,532 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash 439942402, now seen corresponding path program 1 times [2020-12-23 16:53:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:25,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26902521] [2020-12-23 16:53:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:25,633 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 16:53:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26902521] [2020-12-23 16:53:25,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:25,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:25,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786727039] [2020-12-23 16:53:25,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:25,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:25,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:25,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:25,636 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-12-23 16:53:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:25,654 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-23 16:53:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:25,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-23 16:53:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:25,655 INFO L225 Difference]: With dead ends: 27 [2020-12-23 16:53:25,655 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 16:53:25,656 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 16:53:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 16:53:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 16:53:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 16:53:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 16:53:25,658 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-23 16:53:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:25,659 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 16:53:25,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 16:53:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:53:25,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:25,660 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:25,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:53:25,660 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 755017713, now seen corresponding path program 1 times [2020-12-23 16:53:25,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:25,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927766852] [2020-12-23 16:53:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:25,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927766852] [2020-12-23 16:53:25,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543205895] [2020-12-23 16:53:25,758 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 16:53:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:25,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 16:53:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:25,907 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 11 treesize of output 7 [2020-12-23 16:53:25,908 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:25,913 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:25,916 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:25,916 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:53:26,037 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:26,040 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:26,040 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 15 treesize of output 10 [2020-12-23 16:53:26,042 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:26,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:26,053 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:26,054 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-12-23 16:53:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:26,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:26,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 11 [2020-12-23 16:53:26,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116183466] [2020-12-23 16:53:26,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:26,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:26,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:26,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:53:26,077 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 8 states. [2020-12-23 16:53:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:26,233 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-23 16:53:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:26,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 16:53:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:26,235 INFO L225 Difference]: With dead ends: 32 [2020-12-23 16:53:26,235 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 16:53:26,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 16:53:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 16:53:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 16:53:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-23 16:53:26,238 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-12-23 16:53:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:26,238 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-23 16:53:26,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-23 16:53:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:53:26,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:26,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:26,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:26,454 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash -524845965, now seen corresponding path program 1 times [2020-12-23 16:53:26,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:26,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082981502] [2020-12-23 16:53:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082981502] [2020-12-23 16:53:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106457104] [2020-12-23 16:53:26,566 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 16:53:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:26,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 16:53:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:26,751 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 16:53:26,754 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:26,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:26,770 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 16:53:26,771 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:53:26,976 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:26,978 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:26,979 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 18 treesize of output 10 [2020-12-23 16:53:26,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:26,994 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:26,998 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:26,999 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:3 [2020-12-23 16:53:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:27,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:27,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 12 [2020-12-23 16:53:27,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254384053] [2020-12-23 16:53:27,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:53:27,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:53:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:53:27,028 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2020-12-23 16:53:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,255 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-23 16:53:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:27,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-23 16:53:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,256 INFO L225 Difference]: With dead ends: 32 [2020-12-23 16:53:27,256 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 16:53:27,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:53:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 16:53:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-23 16:53:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 16:53:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 16:53:27,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-12-23 16:53:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,260 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 16:53:27,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:53:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 16:53:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:53:27,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 16:53:27,476 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash -547316234, now seen corresponding path program 1 times [2020-12-23 16:53:27,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398159868] [2020-12-23 16:53:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:27,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398159868] [2020-12-23 16:53:27,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740692861] [2020-12-23 16:53:27,591 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 16:53:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:53:27,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:27,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:27,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 16:53:27,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301187048] [2020-12-23 16:53:27,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:53:27,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:53:27,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:53:27,769 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 13 states. [2020-12-23 16:53:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,902 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 16:53:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:27,903 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-12-23 16:53:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,904 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:53:27,904 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 16:53:27,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 16:53:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-23 16:53:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:53:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 16:53:27,907 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-12-23 16:53:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,908 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 16:53:27,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:53:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 16:53:27,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 16:53:27,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 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: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:28,119 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:28,120 INFO L82 PathProgramCache]: Analyzing trace with hash -931353202, now seen corresponding path program 2 times [2020-12-23 16:53:28,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:28,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964167557] [2020-12-23 16:53:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:28,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964167557] [2020-12-23 16:53:28,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904817163] [2020-12-23 16:53:28,309 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 16:53:28,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:28,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:53:28,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:28,516 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 16:53:28,517 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:28,524 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:28,527 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 16:53:28,528 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:53:28,802 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:28,805 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:28,805 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 18 treesize of output 10 [2020-12-23 16:53:28,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:28,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:28,823 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:28,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:3 [2020-12-23 16:53:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:28,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:28,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 16 [2020-12-23 16:53:28,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673036800] [2020-12-23 16:53:28,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:53:28,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:53:28,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:28,870 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-12-23 16:53:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:29,717 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-12-23 16:53:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:53:29,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-23 16:53:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:29,718 INFO L225 Difference]: With dead ends: 81 [2020-12-23 16:53:29,718 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 16:53:29,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:53:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 16:53:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-23 16:53:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 16:53:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-23 16:53:29,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-12-23 16:53:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:29,722 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-23 16:53:29,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:53:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-23 16:53:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 16:53:29,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:29,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:29,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 16:53:29,932 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash -711322097, now seen corresponding path program 1 times [2020-12-23 16:53:29,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:29,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140657298] [2020-12-23 16:53:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:30,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140657298] [2020-12-23 16:53:30,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975055067] [2020-12-23 16:53:30,087 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 16:53:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 16:53:30,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:30,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:30,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-12-23 16:53:30,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957045792] [2020-12-23 16:53:30,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:30,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:30,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:30,317 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2020-12-23 16:53:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:30,497 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-12-23 16:53:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:30,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-12-23 16:53:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:30,498 INFO L225 Difference]: With dead ends: 41 [2020-12-23 16:53:30,498 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 16:53:30,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:53:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 16:53:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-12-23 16:53:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 16:53:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-23 16:53:30,502 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-12-23 16:53:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:30,502 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-23 16:53:30,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-23 16:53:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 16:53:30,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:30,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:30,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:30,719 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2043154713, now seen corresponding path program 2 times [2020-12-23 16:53:30,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:30,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362034003] [2020-12-23 16:53:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:30,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362034003] [2020-12-23 16:53:30,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306730499] [2020-12-23 16:53:30,967 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 16:53:31,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:31,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:31,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:53:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:31,113 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 16:53:31,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:31,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:31,124 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 16:53:31,124 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:31,543 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:31,544 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 18 treesize of output 18 [2020-12-23 16:53:31,545 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:31,558 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:31,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:31,566 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:53:31,568 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 16:53:31,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-23 16:53:31,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:31,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:31,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2020-12-23 16:53:31,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721829285] [2020-12-23 16:53:31,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:53:31,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:53:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:53:31,761 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2020-12-23 16:53:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:33,603 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-23 16:53:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:53:33,604 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2020-12-23 16:53:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:33,605 INFO L225 Difference]: With dead ends: 73 [2020-12-23 16:53:33,605 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:53:33,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:53:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:53:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-12-23 16:53:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:53:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 16:53:33,610 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 37 [2020-12-23 16:53:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:33,611 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 16:53:33,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:53:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 16:53:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 16:53:33,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:33,613 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:33,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:53:33,827 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1644156286, now seen corresponding path program 3 times [2020-12-23 16:53:33,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:33,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879380903] [2020-12-23 16:53:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:34,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879380903] [2020-12-23 16:53:34,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304519663] [2020-12-23 16:53:34,093 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 16:53:34,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 16:53:34,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:34,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:53:34,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:34,538 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 16:53:34,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:34,546 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:34,547 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 16:53:34,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:53:34,705 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 16:53:34,706 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:34,708 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:34,709 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 16:53:34,709 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:34,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:34,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2020-12-23 16:53:34,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502349669] [2020-12-23 16:53:34,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:53:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:34,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:53:34,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:34,726 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 23 states. [2020-12-23 16:53:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:35,270 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-12-23 16:53:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:53:35,271 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-12-23 16:53:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:35,272 INFO L225 Difference]: With dead ends: 80 [2020-12-23 16:53:35,272 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 16:53:35,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:53:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 16:53:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-23 16:53:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:53:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 16:53:35,276 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2020-12-23 16:53:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:35,277 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 16:53:35,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:53:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 16:53:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 16:53:35,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:35,279 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:35,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:53:35,495 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash -241928763, now seen corresponding path program 4 times [2020-12-23 16:53:35,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:35,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73319723] [2020-12-23 16:53:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:35,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73319723] [2020-12-23 16:53:35,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277840807] [2020-12-23 16:53:35,775 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 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 16:53:35,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:35,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:35,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 16:53:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:35,894 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:53:35,895 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,901 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:35,902 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,902 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:53:35,985 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 16:53:35,986 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,993 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:35,993 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,994 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:53:36,216 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:36,217 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 19 treesize of output 19 [2020-12-23 16:53:36,218 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:36,229 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:36,230 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:36,230 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:53:36,273 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:36,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:36,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:36,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2020-12-23 16:53:36,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660703113] [2020-12-23 16:53:36,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:53:36,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:53:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:53:36,430 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 25 states. [2020-12-23 16:53:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:37,303 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-23 16:53:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:37,304 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-12-23 16:53:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:37,304 INFO L225 Difference]: With dead ends: 61 [2020-12-23 16:53:37,305 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 16:53:37,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:53:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 16:53:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-23 16:53:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 16:53:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-23 16:53:37,309 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 51 [2020-12-23 16:53:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:37,309 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-23 16:53:37,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:53:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-23 16:53:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 16:53:37,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:37,310 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:37,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:53:37,526 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:37,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1247620637, now seen corresponding path program 5 times [2020-12-23 16:53:37,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:37,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481697744] [2020-12-23 16:53:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:37,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481697744] [2020-12-23 16:53:37,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780846889] [2020-12-23 16:53:37,830 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 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 16:53:37,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 16:53:37,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 16:53:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:38,221 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 16:53:38,223 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:38,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:38,232 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 16:53:38,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:53:38,401 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 16:53:38,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:38,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:38,404 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 16:53:38,404 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:38,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:38,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2020-12-23 16:53:38,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831575759] [2020-12-23 16:53:38,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:53:38,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:53:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:53:38,420 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 26 states. [2020-12-23 16:53:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:39,166 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2020-12-23 16:53:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:53:39,167 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-12-23 16:53:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:39,167 INFO L225 Difference]: With dead ends: 96 [2020-12-23 16:53:39,168 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 16:53:39,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:53:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 16:53:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-12-23 16:53:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 16:53:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-23 16:53:39,172 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2020-12-23 16:53:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:39,172 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-23 16:53:39,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:53:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-23 16:53:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 16:53:39,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:39,174 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:39,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:39,388 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash 757760416, now seen corresponding path program 6 times [2020-12-23 16:53:39,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:39,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604310804] [2020-12-23 16:53:39,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:39,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604310804] [2020-12-23 16:53:39,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607332555] [2020-12-23 16:53:39,701 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 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 16:53:39,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 16:53:39,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:39,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:53:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:39,815 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:53:39,816 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:39,822 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:39,822 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:39,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:53:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:40,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:40,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2020-12-23 16:53:40,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782158757] [2020-12-23 16:53:40,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:53:40,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:40,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:53:40,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:53:40,260 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 28 states. [2020-12-23 16:53:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:40,907 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-12-23 16:53:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:40,907 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-12-23 16:53:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:40,908 INFO L225 Difference]: With dead ends: 71 [2020-12-23 16:53:40,908 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 16:53:40,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:53:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 16:53:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-12-23 16:53:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 16:53:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-12-23 16:53:40,918 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2020-12-23 16:53:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:40,919 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-12-23 16:53:40,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:53:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-12-23 16:53:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 16:53:40,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:40,923 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:41,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:41,138 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash 586394040, now seen corresponding path program 7 times [2020-12-23 16:53:41,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:41,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263700820] [2020-12-23 16:53:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:41,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263700820] [2020-12-23 16:53:41,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820889284] [2020-12-23 16:53:41,587 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 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 16:53:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 16:53:41,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:41,931 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 16:53:41,931 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:41,938 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:41,939 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 16:53:41,940 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:53:42,116 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 16:53:42,117 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:42,119 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:42,119 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 16:53:42,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:42,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:42,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2020-12-23 16:53:42,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882058060] [2020-12-23 16:53:42,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:53:42,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:42,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:53:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:53:42,134 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 29 states. [2020-12-23 16:53:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:43,165 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2020-12-23 16:53:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 16:53:43,166 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-12-23 16:53:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:43,167 INFO L225 Difference]: With dead ends: 112 [2020-12-23 16:53:43,167 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:53:43,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:53:43,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:53:43,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-23 16:53:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 16:53:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 16:53:43,171 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2020-12-23 16:53:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:43,171 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 16:53:43,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:53:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 16:53:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 16:53:43,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:43,172 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:43,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:43,386 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:43,387 INFO L82 PathProgramCache]: Analyzing trace with hash 8172923, now seen corresponding path program 8 times [2020-12-23 16:53:43,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:43,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899723907] [2020-12-23 16:53:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:43,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899723907] [2020-12-23 16:53:43,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663452421] [2020-12-23 16:53:43,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:43,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:43,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 16:53:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:44,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:44,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2020-12-23 16:53:44,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010950322] [2020-12-23 16:53:44,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:53:44,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:44,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:53:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:53:44,160 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2020-12-23 16:53:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:44,705 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-12-23 16:53:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:53:44,706 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-12-23 16:53:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:44,707 INFO L225 Difference]: With dead ends: 81 [2020-12-23 16:53:44,707 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 16:53:44,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:53:44,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 16:53:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-12-23 16:53:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 16:53:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-23 16:53:44,711 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 71 [2020-12-23 16:53:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:44,713 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-23 16:53:44,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:53:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-23 16:53:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 16:53:44,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:44,714 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:44,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 16:53:44,928 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash -813150893, now seen corresponding path program 9 times [2020-12-23 16:53:44,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:44,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598676405] [2020-12-23 16:53:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598676405] [2020-12-23 16:53:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530288056] [2020-12-23 16:53:45,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:45,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 16:53:45,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 16:53:45,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:46,046 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 16:53:46,048 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:46,055 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:46,057 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 16:53:46,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:53:46,263 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 16:53:46,264 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:46,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:46,267 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 16:53:46,268 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:46,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:46,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2020-12-23 16:53:46,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379682650] [2020-12-23 16:53:46,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:53:46,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:46,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:53:46,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:53:46,285 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 32 states. [2020-12-23 16:53:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:47,496 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2020-12-23 16:53:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:53:47,497 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2020-12-23 16:53:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:47,498 INFO L225 Difference]: With dead ends: 128 [2020-12-23 16:53:47,498 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 16:53:47,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:53:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 16:53:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-23 16:53:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 16:53:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-12-23 16:53:47,502 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2020-12-23 16:53:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:47,502 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-12-23 16:53:47,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:53:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-12-23 16:53:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 16:53:47,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:47,503 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:47,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:47,717 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1404289366, now seen corresponding path program 10 times [2020-12-23 16:53:47,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:47,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081584781] [2020-12-23 16:53:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:48,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081584781] [2020-12-23 16:53:48,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116570626] [2020-12-23 16:53:48,097 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 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 16:53:48,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:48,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:48,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 16:53:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:48,190 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:53:48,191 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,198 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,199 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,199 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:53:48,305 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 16:53:48,307 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,314 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,315 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,315 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:53:48,823 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,824 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 19 treesize of output 19 [2020-12-23 16:53:48,825 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:48,837 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,838 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,838 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:53:48,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:48,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 72 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:49,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:49,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 33 [2020-12-23 16:53:49,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532886418] [2020-12-23 16:53:49,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 16:53:49,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:49,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 16:53:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:53:49,136 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 34 states. [2020-12-23 16:53:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:50,877 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-12-23 16:53:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:53:50,878 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2020-12-23 16:53:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:50,879 INFO L225 Difference]: With dead ends: 91 [2020-12-23 16:53:50,879 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 16:53:50,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:53:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 16:53:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-12-23 16:53:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 16:53:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-23 16:53:50,883 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2020-12-23 16:53:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:50,884 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-23 16:53:50,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 16:53:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-23 16:53:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 16:53:50,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:50,885 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:51,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 16:53:51,100 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1023424274, now seen corresponding path program 11 times [2020-12-23 16:53:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:51,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298791148] [2020-12-23 16:53:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:51,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298791148] [2020-12-23 16:53:51,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321255524] [2020-12-23 16:53:51,701 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 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 16:53:51,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 16:53:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:52,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 16:53:52,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:52,406 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 16:53:52,406 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,413 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:52,415 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 16:53:52,415 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:53:52,636 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 16:53:52,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,639 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:52,639 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 16:53:52,639 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:52,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:52,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2020-12-23 16:53:52,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35092879] [2020-12-23 16:53:52,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 16:53:52,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:52,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 16:53:52,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:53:52,666 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 35 states. [2020-12-23 16:53:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:54,125 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2020-12-23 16:53:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:53:54,126 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2020-12-23 16:53:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:54,127 INFO L225 Difference]: With dead ends: 144 [2020-12-23 16:53:54,127 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 16:53:54,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:53:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 16:53:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-12-23 16:53:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 16:53:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-23 16:53:54,131 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2020-12-23 16:53:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:54,131 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-23 16:53:54,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 16:53:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-23 16:53:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 16:53:54,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:54,132 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:54,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:54,334 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:54,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:54,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1390914255, now seen corresponding path program 12 times [2020-12-23 16:53:54,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:54,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004669533] [2020-12-23 16:53:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:54,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004669533] [2020-12-23 16:53:54,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327646822] [2020-12-23 16:53:54,786 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 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 16:53:55,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 16:53:55,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:55,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:53:55,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:55,192 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:53:55,193 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:55,197 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:55,198 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:55,198 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:53:55,282 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 16:53:55,283 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:55,289 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:55,291 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 16:53:55,291 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2020-12-23 16:53:55,548 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:55,548 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 20 treesize of output 20 [2020-12-23 16:53:55,550 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:55,563 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:55,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:55,566 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 16:53:55,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2020-12-23 16:53:55,610 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:55,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-23 16:53:55,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:55,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 27 [2020-12-23 16:53:55,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038815183] [2020-12-23 16:53:55,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:53:55,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:55,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:53:55,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:53:55,792 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 28 states. [2020-12-23 16:53:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:57,251 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-12-23 16:53:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:53:57,252 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-12-23 16:53:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:57,252 INFO L225 Difference]: With dead ends: 94 [2020-12-23 16:53:57,252 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 16:53:57,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 16:53:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 16:53:57,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 16:53:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 16:53:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 16:53:57,254 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2020-12-23 16:53:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:57,255 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 16:53:57,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:53:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 16:53:57,255 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 16:53:57,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:53:57,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:53:57 BoogieIcfgContainer [2020-12-23 16:53:57,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:53:57,463 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:53:57,464 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:53:57,464 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:53:57,464 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:22" (3/4) ... [2020-12-23 16:53:57,468 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 16:53:57,479 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 16:53:57,479 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 16:53:57,480 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 16:53:57,532 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/openbsd_cstrnlen-alloca-1.i-witness.graphml [2020-12-23 16:53:57,532 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:53:57,533 INFO L168 Benchmark]: Toolchain (without parser) took 35830.20 ms. Allocated memory was 159.4 MB in the beginning and 336.6 MB in the end (delta: 177.2 MB). Free memory was 135.0 MB in the beginning and 242.6 MB in the end (delta: -107.6 MB). Peak memory consumption was 70.4 MB. Max. memory is 8.0 GB. [2020-12-23 16:53:57,534 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 143.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:53:57,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 575.07 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 114.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-12-23 16:53:57,534 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.45 ms. Allocated memory is still 159.4 MB. Free memory was 114.2 MB in the beginning and 112.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:53:57,535 INFO L168 Benchmark]: Boogie Preprocessor took 66.01 ms. Allocated memory is still 159.4 MB. Free memory was 112.3 MB in the beginning and 111.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:53:57,539 INFO L168 Benchmark]: RCFGBuilder took 538.98 ms. Allocated memory is still 159.4 MB. Free memory was 110.9 MB in the beginning and 136.0 MB in the end (delta: -25.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-23 16:53:57,543 INFO L168 Benchmark]: TraceAbstraction took 34484.47 ms. Allocated memory was 159.4 MB in the beginning and 336.6 MB in the end (delta: 177.2 MB). Free memory was 135.5 MB in the beginning and 245.2 MB in the end (delta: -109.7 MB). Peak memory consumption was 69.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:53:57,544 INFO L168 Benchmark]: Witness Printer took 68.45 ms. Allocated memory is still 336.6 MB. Free memory was 245.2 MB in the beginning and 242.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:53:57,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 143.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 575.07 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 114.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 88.45 ms. Allocated memory is still 159.4 MB. Free memory was 114.2 MB in the beginning and 112.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.01 ms. Allocated memory is still 159.4 MB. Free memory was 112.3 MB in the beginning and 111.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 538.98 ms. Allocated memory is still 159.4 MB. Free memory was 110.9 MB in the beginning and 136.0 MB in the end (delta: -25.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34484.47 ms. Allocated memory was 159.4 MB in the beginning and 336.6 MB in the end (delta: 177.2 MB). Free memory was 135.5 MB in the beginning and 245.2 MB in the end (delta: -109.7 MB). Peak memory consumption was 69.0 MB. Max. memory is 8.0 GB. * Witness Printer took 68.45 ms. Allocated memory is still 336.6 MB. Free memory was 245.2 MB in the beginning and 242.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.3s, OverallIterations: 26, TraceHistogramMax: 9, AutomataDifference: 14.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 672 SDtfs, 3696 SDslu, 6206 SDs, 0 SdLazy, 7732 SolverSat, 568 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1265 GetRequests, 712 SyntacticMatches, 10 SemanticMatches, 543 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 14.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 142 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 1796 NumberOfCodeBlocks, 1770 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 1753 ConstructedInterpolants, 114 QuantifiedInterpolants, 1036681 SizeOfPredicates, 188 NumberOfNonLiveVariables, 2655 ConjunctsInSsa, 641 ConjunctsInUnsatCore, 43 InterpolantComputations, 11 PerfectInterpolantSequences, 860/3622 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...