/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-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/test22-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:17:59,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:17:59,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:17:59,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:17:59,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:17:59,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:17:59,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:17:59,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:17:59,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:17:59,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:17:59,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:17:59,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:17:59,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:17:59,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:17:59,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:17:59,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:17:59,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:17:59,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:17:59,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:17:59,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:17:59,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:17:59,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:17:59,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:17:59,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:17:59,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 06:17:59,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 06:17:59,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 06:18:00,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 06:18:00,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 06:18:00,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 06:18:00,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:18:00,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:18:00,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:18:00,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:18:00,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:18:00,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:18:00,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:18:00,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:18:00,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:18:00,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:18:00,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:18:00,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:18:00,071 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:18:00,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:18:00,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:18:00,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:18:00,078 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:18:00,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:18:00,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:18:00,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:18:00,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:18:00,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:18:00,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:18:00,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:18:00,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:18:00,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:18:00,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:18:00,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:18:00,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:18:00,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:18:00,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:18:00,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:18:00,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:18:00,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:18:00,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:18:00,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:18:00,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:18:00,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:18:00,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:18:00,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:18:00,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:18:00,615 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:18:00,617 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:18:00,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test22-1.c [2020-12-23 06:18:00,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fd3fd77ca/459f7d41cc74491a93fb8abaa825ce50/FLAG5bd489f5e [2020-12-23 06:18:01,413 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:18:01,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c [2020-12-23 06:18:01,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fd3fd77ca/459f7d41cc74491a93fb8abaa825ce50/FLAG5bd489f5e [2020-12-23 06:18:01,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fd3fd77ca/459f7d41cc74491a93fb8abaa825ce50 [2020-12-23 06:18:01,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:18:01,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:18:01,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:18:01,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:18:01,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:18:01,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:18:01" (1/1) ... [2020-12-23 06:18:01,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6b29ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:01, skipping insertion in model container [2020-12-23 06:18:01,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:18:01" (1/1) ... [2020-12-23 06:18:01,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:18:01,820 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d1~0,GLOBAL],a] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d1~0,GLOBAL],b] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d2~0,GLOBAL],a] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d2~0,GLOBAL],b] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:18:02,037 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c[1029,1042] [2020-12-23 06:18:02,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:18:02,055 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:18:02,081 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c[1029,1042] [2020-12-23 06:18:02,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:18:02,103 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:18:02,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02 WrapperNode [2020-12-23 06:18:02,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:18:02,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:18:02,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:18:02,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:18:02,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:18:02,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:18:02,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:18:02,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:18:02,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:18:02,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:18:02,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:18:02,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:18:02,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (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 06:18:02,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:18:02,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:18:02,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:18:02,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:18:02,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:18:02,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:18:02,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:18:02,810 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 06:18:02,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:02 BoogieIcfgContainer [2020-12-23 06:18:02,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:18:02,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:18:02,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:18:02,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:18:02,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:18:01" (1/3) ... [2020-12-23 06:18:02,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39857c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:18:02, skipping insertion in model container [2020-12-23 06:18:02,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (2/3) ... [2020-12-23 06:18:02,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39857c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:18:02, skipping insertion in model container [2020-12-23 06:18:02,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:02" (3/3) ... [2020-12-23 06:18:02,827 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-1.c [2020-12-23 06:18:02,837 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:18:02,844 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:18:02,871 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:18:02,925 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:18:02,925 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:18:02,926 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:18:02,926 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:18:02,926 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:18:02,926 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:18:02,926 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:18:02,927 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:18:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-23 06:18:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:18:02,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:02,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:02,958 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash 164664103, now seen corresponding path program 1 times [2020-12-23 06:18:02,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:02,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222686375] [2020-12-23 06:18:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:03,352 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 06:18:03,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222686375] [2020-12-23 06:18:03,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:03,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:18:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261377568] [2020-12-23 06:18:03,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:18:03,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:03,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:18:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:18:03,415 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-23 06:18:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:03,437 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-23 06:18:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:18:03,439 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-12-23 06:18:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:03,452 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:18:03,452 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:18:03,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:18:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:18:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 06:18:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:18:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 06:18:03,504 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2020-12-23 06:18:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:03,505 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 06:18:03,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:18:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 06:18:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:18:03,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:03,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:03,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:18:03,507 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:03,508 INFO L82 PathProgramCache]: Analyzing trace with hash 603612068, now seen corresponding path program 1 times [2020-12-23 06:18:03,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:03,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739487787] [2020-12-23 06:18:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:03,876 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 06:18:03,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739487787] [2020-12-23 06:18:03,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:03,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 06:18:03,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119450457] [2020-12-23 06:18:03,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:18:03,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:03,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:18:03,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:18:03,883 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 10 states. [2020-12-23 06:18:04,627 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-12-23 06:18:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:05,000 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-12-23 06:18:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:18:05,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 06:18:05,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:05,004 INFO L225 Difference]: With dead ends: 96 [2020-12-23 06:18:05,004 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 06:18:05,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:18:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 06:18:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 33. [2020-12-23 06:18:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:18:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-23 06:18:05,021 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-12-23 06:18:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:05,021 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-23 06:18:05,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:18:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-23 06:18:05,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:18:05,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:05,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:05,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:18:05,024 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash -407505182, now seen corresponding path program 1 times [2020-12-23 06:18:05,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:05,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085978523] [2020-12-23 06:18:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:05,224 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 06:18:05,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085978523] [2020-12-23 06:18:05,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:05,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 06:18:05,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072714026] [2020-12-23 06:18:05,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:18:05,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:05,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:18:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:18:05,229 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 10 states. [2020-12-23 06:18:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:05,781 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-12-23 06:18:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:18:05,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 06:18:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:05,783 INFO L225 Difference]: With dead ends: 91 [2020-12-23 06:18:05,784 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:18:05,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:18:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:18:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 33. [2020-12-23 06:18:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:18:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 06:18:05,797 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2020-12-23 06:18:05,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:05,797 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 06:18:05,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:18:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 06:18:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:18:05,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:05,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:05,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:18:05,800 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:05,801 INFO L82 PathProgramCache]: Analyzing trace with hash -984735834, now seen corresponding path program 1 times [2020-12-23 06:18:05,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:05,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336140377] [2020-12-23 06:18:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:05,965 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 06:18:05,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336140377] [2020-12-23 06:18:05,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:05,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 06:18:05,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160254432] [2020-12-23 06:18:05,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:18:05,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:18:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:18:05,972 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2020-12-23 06:18:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:06,427 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-12-23 06:18:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:18:06,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 06:18:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:06,429 INFO L225 Difference]: With dead ends: 81 [2020-12-23 06:18:06,430 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 06:18:06,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:18:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 06:18:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2020-12-23 06:18:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:18:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-23 06:18:06,440 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 20 [2020-12-23 06:18:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:06,440 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-23 06:18:06,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:18:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-23 06:18:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:18:06,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:06,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:06,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:18:06,442 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:06,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1995853084, now seen corresponding path program 1 times [2020-12-23 06:18:06,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:06,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135682759] [2020-12-23 06:18:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:06,630 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 06:18:06,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135682759] [2020-12-23 06:18:06,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:06,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 06:18:06,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385172345] [2020-12-23 06:18:06,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:18:06,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:06,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:18:06,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:18:06,634 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-12-23 06:18:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:07,176 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-12-23 06:18:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:18:07,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 06:18:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:07,182 INFO L225 Difference]: With dead ends: 73 [2020-12-23 06:18:07,183 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:18:07,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:18:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:18:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 26. [2020-12-23 06:18:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:18:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-23 06:18:07,210 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2020-12-23 06:18:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:07,211 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-23 06:18:07,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:18:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-23 06:18:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:18:07,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:07,213 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:07,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 06:18:07,213 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:07,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1760411593, now seen corresponding path program 1 times [2020-12-23 06:18:07,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:07,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724895118] [2020-12-23 06:18:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:07,553 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 06:18:07,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724895118] [2020-12-23 06:18:07,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033385290] [2020-12-23 06:18:07,555 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 06:18:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:07,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:18:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:08,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-23 06:18:08,325 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:08,330 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:08,332 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:08,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2020-12-23 06:18:08,377 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 06:18:08,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:08,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2020-12-23 06:18:08,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278662889] [2020-12-23 06:18:08,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:18:08,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:18:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:18:08,381 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 24 states. [2020-12-23 06:18:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:09,989 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-12-23 06:18:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:18:09,990 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2020-12-23 06:18:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:09,992 INFO L225 Difference]: With dead ends: 77 [2020-12-23 06:18:09,992 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:18:09,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:18:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:18:10,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2020-12-23 06:18:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:18:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-12-23 06:18:10,005 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2020-12-23 06:18:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:10,005 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-12-23 06:18:10,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:18:10,006 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-12-23 06:18:10,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:18:10,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:10,007 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:10,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:18:10,223 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:10,225 INFO L82 PathProgramCache]: Analyzing trace with hash -949600503, now seen corresponding path program 1 times [2020-12-23 06:18:10,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:10,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523301585] [2020-12-23 06:18:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:10,486 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 06:18:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523301585] [2020-12-23 06:18:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195617407] [2020-12-23 06:18:10,488 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 06:18:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:10,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:18:10,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:11,003 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-23 06:18:11,007 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:11,013 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:11,017 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 06:18:11,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2020-12-23 06:18:11,032 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 06:18:11,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:11,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-23 06:18:11,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174712436] [2020-12-23 06:18:11,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:18:11,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:11,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:18:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:18:11,044 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 23 states. [2020-12-23 06:18:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:12,775 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-12-23 06:18:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:18:12,776 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2020-12-23 06:18:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:12,777 INFO L225 Difference]: With dead ends: 81 [2020-12-23 06:18:12,777 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 06:18:12,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:18:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 06:18:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 28. [2020-12-23 06:18:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:18:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 06:18:12,788 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-12-23 06:18:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:12,788 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 06:18:12,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:18:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 06:18:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:18:12,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:12,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:13,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:13,004 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1048225454, now seen corresponding path program 2 times [2020-12-23 06:18:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:13,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939340168] [2020-12-23 06:18:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:13,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939340168] [2020-12-23 06:18:13,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631431671] [2020-12-23 06:18:13,332 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 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 06:18:13,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:18:13,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:13,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:18:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:13,946 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-23 06:18:13,948 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:13,953 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:13,955 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 06:18:13,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2020-12-23 06:18:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:13,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:13,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2020-12-23 06:18:13,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235300259] [2020-12-23 06:18:13,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:18:13,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:13,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:18:13,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:18:13,971 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 25 states. [2020-12-23 06:18:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:15,943 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-23 06:18:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:18:15,944 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2020-12-23 06:18:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:15,945 INFO L225 Difference]: With dead ends: 85 [2020-12-23 06:18:15,945 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 06:18:15,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=473, Invalid=1879, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:18:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 06:18:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2020-12-23 06:18:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:18:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-23 06:18:15,958 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 24 [2020-12-23 06:18:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:15,958 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-23 06:18:15,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:18:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-23 06:18:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:18:15,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:15,960 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:16,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:16,174 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:16,175 INFO L82 PathProgramCache]: Analyzing trace with hash -523217426, now seen corresponding path program 2 times [2020-12-23 06:18:16,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:16,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825317942] [2020-12-23 06:18:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:16,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825317942] [2020-12-23 06:18:16,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770470091] [2020-12-23 06:18:16,442 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 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 06:18:16,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:18:16,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:18:16,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:17,128 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-23 06:18:17,132 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:17,137 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:17,139 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 06:18:17,140 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2020-12-23 06:18:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:17,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:17,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2020-12-23 06:18:17,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245808447] [2020-12-23 06:18:17,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:18:17,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:17,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:18:17,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:18:17,150 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 25 states. [2020-12-23 06:18:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:19,173 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-12-23 06:18:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:18:19,176 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2020-12-23 06:18:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:19,179 INFO L225 Difference]: With dead ends: 89 [2020-12-23 06:18:19,180 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 06:18:19,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=476, Invalid=1876, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:18:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 06:18:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 30. [2020-12-23 06:18:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:18:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 06:18:19,211 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-12-23 06:18:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:19,211 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 06:18:19,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:18:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 06:18:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:18:19,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:19,216 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:19,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:19,430 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:19,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:19,431 INFO L82 PathProgramCache]: Analyzing trace with hash -462854061, now seen corresponding path program 3 times [2020-12-23 06:18:19,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:19,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842933097] [2020-12-23 06:18:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:19,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842933097] [2020-12-23 06:18:19,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59997409] [2020-12-23 06:18:19,740 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 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 06:18:19,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:18:19,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:19,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:18:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:20,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:18:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:18:20,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:20,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2020-12-23 06:18:20,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291327098] [2020-12-23 06:18:20,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:18:20,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:20,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:18:20,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:18:20,369 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 28 states. [2020-12-23 06:18:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:23,417 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-12-23 06:18:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:18:23,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 26 [2020-12-23 06:18:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:23,419 INFO L225 Difference]: With dead ends: 89 [2020-12-23 06:18:23,419 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:18:23,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=681, Invalid=2741, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:18:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:18:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2020-12-23 06:18:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:18:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 06:18:23,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2020-12-23 06:18:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:23,430 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 06:18:23,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:18:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 06:18:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:18:23,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:23,431 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:23,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:18:23,641 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1209026451, now seen corresponding path program 3 times [2020-12-23 06:18:23,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928831453] [2020-12-23 06:18:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:23,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928831453] [2020-12-23 06:18:23,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286106731] [2020-12-23 06:18:23,962 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 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 06:18:24,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:18:24,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:24,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:18:24,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:24,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:18:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:18:24,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:24,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 30 [2020-12-23 06:18:24,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950974410] [2020-12-23 06:18:24,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:18:24,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:18:24,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:18:24,792 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 30 states. [2020-12-23 06:18:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:28,821 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-23 06:18:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:18:28,821 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2020-12-23 06:18:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:28,822 INFO L225 Difference]: With dead ends: 49 [2020-12-23 06:18:28,822 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:18:28,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=866, Invalid=3690, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:18:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:18:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:18:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:18:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:18:28,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-12-23 06:18:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:28,826 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:18:28,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:18:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:18:28,826 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:18:29,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:29,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:18:30,097 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 195 DAG size of output: 164 [2020-12-23 06:18:30,238 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-12-23 06:18:30,363 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-12-23 06:18:31,552 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 163 DAG size of output: 39 [2020-12-23 06:18:31,768 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-12-23 06:18:32,085 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-12-23 06:18:32,561 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2020-12-23 06:18:32,566 INFO L185 CegarLoopUtils]: At program point L44(lines 33 52) the Hoare annotation is: false [2020-12-23 06:18:32,567 INFO L189 CegarLoopUtils]: For program point L40-1(lines 40 42) no Hoare annotation was computed. [2020-12-23 06:18:32,567 INFO L185 CegarLoopUtils]: At program point L40-3(lines 40 42) the Hoare annotation is: (let ((.cse0 (= |~#d2~0.offset| 0)) (.cse1 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse2 (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base)) (.cse3 (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base)) (.cse4 (= |~#d1~0.offset| 0)) (.cse5 (= ULTIMATE.start_main_~pd2~0.offset 0)) (.cse6 (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1)))) (or (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) .cse4 (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse5 .cse6 (= ULTIMATE.start_main_~pa~0.offset ULTIMATE.start_main_~pd2~0.offset) (not (= ULTIMATE.start_main_~pd1~0.base 0))) (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse4 .cse5 .cse6 (= ULTIMATE.start_main_~pa~0.offset 0)))) [2020-12-23 06:18:32,568 INFO L189 CegarLoopUtils]: For program point L40-4(lines 40 42) no Hoare annotation was computed. [2020-12-23 06:18:32,568 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:18:32,568 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:18:32,568 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:18:32,568 INFO L189 CegarLoopUtils]: For program point L24(line 24) no Hoare annotation was computed. [2020-12-23 06:18:32,568 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 50) no Hoare annotation was computed. [2020-12-23 06:18:32,569 INFO L189 CegarLoopUtils]: For program point L24-2(line 24) no Hoare annotation was computed. [2020-12-23 06:18:32,569 INFO L185 CegarLoopUtils]: At program point L24-3(lines 22 25) the Hoare annotation is: (let ((.cse0 (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) (.cse1 (= |~#d1~0.offset| 0))) (or (and (= |~#d2~0.offset| 0) (not (= |~#d1~0.base| |~#d2~0.base|)) .cse0 (= |~#d1~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) .cse1) (and (= |ULTIMATE.start_get_dummy_#res.offset| 0) (not .cse0) (= |~#d2~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|) .cse1))) [2020-12-23 06:18:32,569 INFO L189 CegarLoopUtils]: For program point L24-4(line 24) no Hoare annotation was computed. [2020-12-23 06:18:32,569 INFO L189 CegarLoopUtils]: For program point L24-6(line 24) no Hoare annotation was computed. [2020-12-23 06:18:32,570 INFO L185 CegarLoopUtils]: At program point L24-7(lines 22 25) the Hoare annotation is: (let ((.cse0 (not (= |~#d1~0.base| |~#d2~0.base|)))) (or (and (= |ULTIMATE.start_get_dummy_#res.offset| 0) (or (and (not (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) (= |~#d2~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|)) (and .cse0 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset))) (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) (= |~#d1~0.offset| 0)) (and .cse0 (not (= ULTIMATE.start_main_~pd1~0.base |ULTIMATE.start_get_dummy_#res.base|))))) [2020-12-23 06:18:32,570 INFO L189 CegarLoopUtils]: For program point L24-8(line 24) no Hoare annotation was computed. [2020-12-23 06:18:32,570 INFO L189 CegarLoopUtils]: For program point L24-10(line 24) no Hoare annotation was computed. [2020-12-23 06:18:32,570 INFO L185 CegarLoopUtils]: At program point L24-11(lines 22 25) the Hoare annotation is: (let ((.cse2 (not (= |~#d1~0.base| |~#d2~0.base|)))) (or (and (let ((.cse1 (= ULTIMATE.start_main_~pd2~0.offset ULTIMATE.start_main_~pd1~0.offset)) (.cse0 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|))) (or (and (not .cse0) (= ULTIMATE.start_main_~pd1~0.offset 0) .cse1 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset)) (and (= |~#d2~0.offset| 0) .cse2 .cse1 .cse0 (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset)))) (= |~#d1~0.offset| 0)) (and .cse2 (not (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base))))) [2020-12-23 06:18:32,570 INFO L189 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2020-12-23 06:18:32,571 INFO L189 CegarLoopUtils]: For program point L37-2(lines 37 46) no Hoare annotation was computed. [2020-12-23 06:18:32,571 INFO L189 CegarLoopUtils]: For program point L37-4(lines 37 46) no Hoare annotation was computed. [2020-12-23 06:18:32,571 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:18:32,571 INFO L185 CegarLoopUtils]: At program point L29(lines 27 30) the Hoare annotation is: (let ((.cse3 (= |~#d2~0.offset| 0)) (.cse0 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse1 (= |ULTIMATE.start_check_#res| 1)) (.cse5 (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base)) (.cse6 (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base)) (.cse2 (= |~#d1~0.offset| 0)) (.cse7 (= ULTIMATE.start_main_~pd2~0.offset 0)) (.cse8 (select |#memory_int| ULTIMATE.start_main_~pd2~0.base))) (or (let ((.cse4 (select .cse8 ULTIMATE.start_main_~pd2~0.offset))) (and .cse0 .cse1 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) .cse2 .cse3 (<= .cse4 ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 (+ .cse4 1)) .cse5 .cse6 (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse7 (= ULTIMATE.start_main_~pa~0.offset ULTIMATE.start_main_~pd2~0.offset) (not (= ULTIMATE.start_main_~pd1~0.base 0)))) (and .cse3 .cse0 .cse1 .cse5 .cse6 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse2 .cse7 (<= (select .cse8 0) ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1)) (= ULTIMATE.start_main_~pa~0.offset 0)))) [2020-12-23 06:18:32,571 INFO L189 CegarLoopUtils]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-12-23 06:18:32,572 INFO L192 CegarLoopUtils]: At program point L51(lines 32 52) the Hoare annotation is: true [2020-12-23 06:18:32,572 INFO L189 CegarLoopUtils]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-12-23 06:18:32,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:18:32 BoogieIcfgContainer [2020-12-23 06:18:32,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:18:32,656 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:18:32,659 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:18:32,660 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:18:32,661 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:02" (3/4) ... [2020-12-23 06:18:32,676 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:18:32,706 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-23 06:18:32,707 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-23 06:18:32,707 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:18:32,707 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:18:32,751 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((d2 == 0 && !(d1 == d2)) && d1 == \result) && d1 == \result) && d1 == 0) || ((((\result == 0 && !(d1 == \result)) && d2 == \result) && \result == d2) && d1 == 0) [2020-12-23 06:18:32,752 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((\result == 0 && (((!(d1 == \result) && d2 == \result) && \result == d2) || ((!(d1 == d2) && pd1 == d1) && d1 == pd1))) && d2 == pd1) && d1 == 0) || (!(d1 == d2) && !(pd1 == \result)) [2020-12-23 06:18:32,754 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((!(d1 == d2) && \result == 1) && pd1 == d2) && d1 == 0) && d2 == 0) && unknown-#memory_int-unknown[pd2][pd2] <= i) && i < unknown-#memory_int-unknown[pd2][pd2] + 1) && pd1 == pd2) && pd2 == pa) && d2 == pd1) && pd2 == 0) && pa == pd2) && !(pd1 == 0)) || (((((((((((d2 == 0 && !(d1 == d2)) && \result == 1) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && unknown-#memory_int-unknown[pd2][0] <= i) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) [2020-12-23 06:18:32,801 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test22-1.c-witness.graphml [2020-12-23 06:18:32,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:18:32,803 INFO L168 Benchmark]: Toolchain (without parser) took 31040.76 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 129.2 MB in the beginning and 209.8 MB in the end (delta: -80.6 MB). Peak memory consumption was 89.7 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:32,803 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory is still 127.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:18:32,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.33 ms. Allocated memory is still 155.2 MB. Free memory was 128.9 MB in the beginning and 118.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:32,808 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.35 ms. Allocated memory is still 155.2 MB. Free memory was 118.8 MB in the beginning and 117.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:32,808 INFO L168 Benchmark]: Boogie Preprocessor took 38.87 ms. Allocated memory is still 155.2 MB. Free memory was 117.1 MB in the beginning and 115.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:32,809 INFO L168 Benchmark]: RCFGBuilder took 612.62 ms. Allocated memory is still 155.2 MB. Free memory was 115.5 MB in the beginning and 97.9 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:32,809 INFO L168 Benchmark]: TraceAbstraction took 29839.46 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 97.7 MB in the beginning and 213.5 MB in the end (delta: -115.8 MB). Peak memory consumption was 155.8 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:32,810 INFO L168 Benchmark]: Witness Printer took 145.87 ms. Allocated memory is still 324.0 MB. Free memory was 213.5 MB in the beginning and 209.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:32,815 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory is still 127.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 336.33 ms. Allocated memory is still 155.2 MB. Free memory was 128.9 MB in the beginning and 118.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.35 ms. Allocated memory is still 155.2 MB. Free memory was 118.8 MB in the beginning and 117.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.87 ms. Allocated memory is still 155.2 MB. Free memory was 117.1 MB in the beginning and 115.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 612.62 ms. Allocated memory is still 155.2 MB. Free memory was 115.5 MB in the beginning and 97.9 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 29839.46 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 97.7 MB in the beginning and 213.5 MB in the end (delta: -115.8 MB). Peak memory consumption was 155.8 MB. Max. memory is 8.0 GB. * Witness Printer took 145.87 ms. Allocated memory is still 324.0 MB. Free memory was 213.5 MB in the beginning and 209.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((d2 == 0 && !(d1 == d2)) && d1 == \result) && d1 == \result) && d1 == 0) || ((((\result == 0 && !(d1 == \result)) && d2 == \result) && \result == d2) && d1 == 0) - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((d2 == 0 && !(d1 == d2)) && pd1 == pd2) && pd2 == pa) && pd1 == d2) && d1 == 0) && d2 == pd1) && pd2 == 0) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == pd2) && !(pd1 == 0)) || (((((((((d2 == 0 && !(d1 == d2)) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((\result == 0 && (((!(d1 == \result) && d2 == \result) && \result == d2) || ((!(d1 == d2) && pd1 == d1) && d1 == pd1))) && d2 == pd1) && d1 == 0) || (!(d1 == d2) && !(pd1 == \result)) - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((!(pd1 == d1) && pd1 == 0) && pd2 == pd1) && pd1 == d2) && d2 == pd1) || ((((d2 == 0 && !(d1 == d2)) && pd2 == pd1) && pd1 == d1) && d1 == pd1)) && d1 == 0) || (!(d1 == d2) && !(pd1 == pd2)) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((!(d1 == d2) && \result == 1) && pd1 == d2) && d1 == 0) && d2 == 0) && unknown-#memory_int-unknown[pd2][pd2] <= i) && i < unknown-#memory_int-unknown[pd2][pd2] + 1) && pd1 == pd2) && pd2 == pa) && d2 == pd1) && pd2 == 0) && pa == pd2) && !(pd1 == 0)) || (((((((((((d2 == 0 && !(d1 == d2)) && \result == 1) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && unknown-#memory_int-unknown[pd2][0] <= i) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.1s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 266 SDtfs, 1243 SDslu, 2050 SDs, 0 SdLazy, 3408 SolverSat, 443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=8, 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, 11 MinimizatonAttempts, 363 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 43 NumberOfFragments, 311 HoareAnnotationTreeSize, 7 FomulaSimplifications, 7109977 FormulaSimplificationTreeSizeReduction, 1.3s HoareSimplificationTime, 7 FomulaSimplificationsInter, 239354 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 387 NumberOfCodeBlocks, 383 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 370 ConstructedInterpolants, 0 QuantifiedInterpolants, 54982 SizeOfPredicates, 69 NumberOfNonLiveVariables, 896 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 18/80 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...